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698d99221d
Careless use of TopMemoryContext for I/O function data meant that repeated use of spi_prepare and spi_freeplan would leak memory at the session level, as per report from Christian Schröder. In addition, spi_prepare leaked a lot of transient data within the current plperl function's SPI Proc context, which would be a problem for repeated use of spi_prepare within a single plperl function call; and it wasn't terribly careful about releasing permanent allocations in event of an error, either. In passing, clean up some copy-and-pasteos in query-lookup error messages. Alex Hunsaker and Tom Lane
2983 lines
77 KiB
C
2983 lines
77 KiB
C
/**********************************************************************
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* plperl.c - perl as a procedural language for PostgreSQL
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*
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* $PostgreSQL: pgsql/src/pl/plperl/plperl.c,v 1.150.2.8 2010/05/17 20:46:53 adunstan Exp $
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*
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**********************************************************************/
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#include "postgres.h"
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/* Defined by Perl */
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#undef _
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/* system stuff */
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#include <ctype.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <locale.h>
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/* postgreSQL stuff */
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#include "access/xact.h"
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#include "catalog/pg_language.h"
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#include "catalog/pg_proc.h"
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#include "catalog/pg_type.h"
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#include "commands/trigger.h"
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#include "executor/spi.h"
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#include "funcapi.h"
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#include "libpq/pqsignal.h"
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#include "mb/pg_wchar.h"
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#include "miscadmin.h"
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#include "nodes/makefuncs.h"
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#include "parser/parse_type.h"
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#include "tcop/tcopprot.h"
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#include "utils/builtins.h"
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#include "utils/fmgroids.h"
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#include "utils/guc.h"
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#include "utils/hsearch.h"
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#include "utils/lsyscache.h"
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#include "utils/memutils.h"
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#include "utils/syscache.h"
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#include "utils/typcache.h"
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/* define our text domain for translations */
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#undef TEXTDOMAIN
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#define TEXTDOMAIN PG_TEXTDOMAIN("plperl")
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/* perl stuff */
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#include "plperl.h"
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/* defines PLPERL_SET_OPMASK */
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#include "plperl_opmask.h"
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EXTERN_C void boot_DynaLoader(pTHX_ CV *cv);
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EXTERN_C void boot_SPI(pTHX_ CV *cv);
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PG_MODULE_MAGIC;
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/**********************************************************************
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* Information associated with a Perl interpreter. We have one interpreter
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* that is used for all plperlu (untrusted) functions. For plperl (trusted)
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* functions, there is a separate interpreter for each effective SQL userid.
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* (This is needed to ensure that an unprivileged user can't inject Perl code
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* that'll be executed with the privileges of some other SQL user.)
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*
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* The plperl_interp_desc structs are kept in a Postgres hash table indexed
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* by userid OID, with OID 0 used for the single untrusted interpreter.
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* Once created, an interpreter is kept for the life of the process.
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*
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* We start out by creating a "held" interpreter, which we initialize
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* only as far as we can do without deciding if it will be trusted or
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* untrusted. Later, when we first need to run a plperl or plperlu
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* function, we complete the initialization appropriately and move the
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* PerlInterpreter pointer into the plperl_interp_hash hashtable. If after
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* that we need more interpreters, we create them as needed if we can, or
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* fail if the Perl build doesn't support multiple interpreters.
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*
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* The reason for all the dancing about with a held interpreter is to make
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* it possible for people to preload a lot of Perl code at postmaster startup
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* (using plperl.on_init) and then use that code in backends. Of course this
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* will only work for the first interpreter created in any backend, but it's
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* still useful with that restriction.
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**********************************************************************/
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typedef struct plperl_interp_desc
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{
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Oid user_id; /* Hash key (must be first!) */
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PerlInterpreter *interp; /* The interpreter */
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HTAB *query_hash; /* plperl_query_entry structs */
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} plperl_interp_desc;
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/**********************************************************************
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* The information we cache about loaded procedures
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*
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* The refcount field counts the struct's reference from the hash table shown
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* below, plus one reference for each function call level that is using the
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* struct. We can release the struct, and the associated Perl sub, when the
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* refcount goes to zero.
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**********************************************************************/
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typedef struct plperl_proc_desc
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{
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char *proname; /* user name of procedure */
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TransactionId fn_xmin; /* xmin/TID of procedure's pg_proc tuple */
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ItemPointerData fn_tid;
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int refcount; /* reference count of this struct */
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SV *reference; /* CODE reference for Perl sub */
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plperl_interp_desc *interp; /* interpreter it's created in */
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bool fn_readonly; /* is function readonly (not volatile)? */
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bool lanpltrusted; /* is it plperl, rather than plperlu? */
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bool fn_retistuple; /* true, if function returns tuple */
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bool fn_retisset; /* true, if function returns set */
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bool fn_retisarray; /* true if function returns array */
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/* Conversion info for function's result type: */
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Oid result_oid; /* Oid of result type */
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FmgrInfo result_in_func; /* I/O function and arg for result type */
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Oid result_typioparam;
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/* Conversion info for function's argument types: */
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int nargs;
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FmgrInfo arg_out_func[FUNC_MAX_ARGS];
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bool arg_is_rowtype[FUNC_MAX_ARGS];
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} plperl_proc_desc;
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#define increment_prodesc_refcount(prodesc) \
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((prodesc)->refcount++)
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#define decrement_prodesc_refcount(prodesc) \
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do { \
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if (--((prodesc)->refcount) <= 0) \
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free_plperl_function(prodesc); \
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} while(0)
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/**********************************************************************
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* For speedy lookup, we maintain a hash table mapping from
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* function OID + trigger flag + user OID to plperl_proc_desc pointers.
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* The reason the plperl_proc_desc struct isn't directly part of the hash
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* entry is to simplify recovery from errors during compile_plperl_function.
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*
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* Note: if the same function is called by multiple userIDs within a session,
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* there will be a separate plperl_proc_desc entry for each userID in the case
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* of plperl functions, but only one entry for plperlu functions, because we
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* set user_id = 0 for that case. If the user redeclares the same function
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* from plperl to plperlu or vice versa, there might be multiple
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* plperl_proc_ptr entries in the hashtable, but only one is valid.
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**********************************************************************/
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typedef struct plperl_proc_key
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{
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Oid proc_id; /* Function OID */
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/*
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* is_trigger is really a bool, but declare as Oid to ensure this struct
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* contains no padding
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*/
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Oid is_trigger; /* is it a trigger function? */
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Oid user_id; /* User calling the function, or 0 */
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} plperl_proc_key;
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typedef struct plperl_proc_ptr
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{
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plperl_proc_key proc_key; /* Hash key (must be first!) */
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plperl_proc_desc *proc_ptr;
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} plperl_proc_ptr;
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/*
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* The information we cache for the duration of a single call to a
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* function.
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*/
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typedef struct plperl_call_data
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{
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plperl_proc_desc *prodesc;
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FunctionCallInfo fcinfo;
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Tuplestorestate *tuple_store;
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TupleDesc ret_tdesc;
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AttInMetadata *attinmeta;
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MemoryContext tmp_cxt;
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} plperl_call_data;
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/**********************************************************************
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* The information we cache about prepared and saved plans
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**********************************************************************/
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typedef struct plperl_query_desc
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{
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char qname[24];
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MemoryContext plan_cxt; /* context holding this struct */
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void *plan;
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int nargs;
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Oid *argtypes;
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FmgrInfo *arginfuncs;
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Oid *argtypioparams;
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} plperl_query_desc;
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/* hash table entry for query desc */
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typedef struct plperl_query_entry
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{
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char query_name[NAMEDATALEN];
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plperl_query_desc *query_data;
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} plperl_query_entry;
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/**********************************************************************
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* Global data
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**********************************************************************/
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static HTAB *plperl_interp_hash = NULL;
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static HTAB *plperl_proc_hash = NULL;
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static plperl_interp_desc *plperl_active_interp = NULL;
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/* If we have an unassigned "held" interpreter, it's stored here */
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static PerlInterpreter *plperl_held_interp = NULL;
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/* GUC variables */
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static bool plperl_use_strict = false;
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static OP *(*pp_require_orig) (pTHX) = NULL;
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static char plperl_opmask[MAXO];
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/* this is saved and restored by plperl_call_handler */
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static plperl_call_data *current_call_data = NULL;
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/**********************************************************************
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* Forward declarations
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**********************************************************************/
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Datum plperl_call_handler(PG_FUNCTION_ARGS);
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Datum plperl_validator(PG_FUNCTION_ARGS);
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void _PG_init(void);
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static PerlInterpreter *plperl_init_interp(void);
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static void set_interp_require(bool trusted);
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static Datum plperl_func_handler(PG_FUNCTION_ARGS);
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static Datum plperl_trigger_handler(PG_FUNCTION_ARGS);
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static void free_plperl_function(plperl_proc_desc *prodesc);
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static plperl_proc_desc *compile_plperl_function(Oid fn_oid, bool is_trigger);
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static SV *plperl_hash_from_tuple(HeapTuple tuple, TupleDesc tupdesc);
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static void plperl_init_shared_libs(pTHX);
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static void plperl_trusted_init(void);
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static void plperl_untrusted_init(void);
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static HV *plperl_spi_execute_fetch_result(SPITupleTable *, int, int);
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static SV *newSVstring(const char *str);
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static SV **hv_store_string(HV *hv, const char *key, SV *val);
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static SV **hv_fetch_string(HV *hv, const char *key);
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static void plperl_create_sub(plperl_proc_desc *desc, char *s, Oid fn_oid);
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static SV *plperl_call_perl_func(plperl_proc_desc *desc, FunctionCallInfo fcinfo);
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static char *strip_trailing_ws(const char *msg);
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static OP *pp_require_safe(pTHX);
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static void activate_interpreter(plperl_interp_desc *interp_desc);
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#ifdef WIN32
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static char *setlocale_perl(int category, char *locale);
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#endif
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/*
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* This routine is a crock, and so is everyplace that calls it. The problem
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* is that the cached form of plperl functions/queries is allocated permanently
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* (mostly via malloc()) and never released until backend exit. Subsidiary
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* data structures such as fmgr info records therefore must live forever
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* as well. A better implementation would store all this stuff in a per-
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* function memory context that could be reclaimed at need. In the meantime,
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* fmgr_info_cxt must be called specifying TopMemoryContext so that whatever
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* it might allocate, and whatever the eventual function might allocate using
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* fn_mcxt, will live forever too.
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*/
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static void
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perm_fmgr_info(Oid functionId, FmgrInfo *finfo)
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{
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fmgr_info_cxt(functionId, finfo, TopMemoryContext);
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}
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/*
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* _PG_init() - library load-time initialization
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*
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* DO NOT make this static nor change its name!
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*/
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void
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_PG_init(void)
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{
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/* Be sure we do initialization only once (should be redundant now) */
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static bool inited = false;
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HASHCTL hash_ctl;
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if (inited)
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return;
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pg_bindtextdomain(TEXTDOMAIN);
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DefineCustomBoolVariable("plperl.use_strict",
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gettext_noop("If true, trusted and untrusted Perl code will be compiled in strict mode."),
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NULL,
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&plperl_use_strict,
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false,
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PGC_USERSET, 0,
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NULL, NULL);
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EmitWarningsOnPlaceholders("plperl");
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/*
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* Create hash tables.
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*/
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memset(&hash_ctl, 0, sizeof(hash_ctl));
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hash_ctl.keysize = sizeof(Oid);
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hash_ctl.entrysize = sizeof(plperl_interp_desc);
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hash_ctl.hash = oid_hash;
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plperl_interp_hash = hash_create("PL/Perl interpreters",
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8,
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&hash_ctl,
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HASH_ELEM | HASH_FUNCTION);
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memset(&hash_ctl, 0, sizeof(hash_ctl));
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hash_ctl.keysize = sizeof(plperl_proc_key);
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hash_ctl.entrysize = sizeof(plperl_proc_ptr);
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hash_ctl.hash = tag_hash;
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plperl_proc_hash = hash_create("PL/Perl procedures",
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32,
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&hash_ctl,
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HASH_ELEM | HASH_FUNCTION);
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/*
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* Save the default opmask.
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*/
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PLPERL_SET_OPMASK(plperl_opmask);
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/*
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* Create the first Perl interpreter, but only partially initialize it.
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*/
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plperl_held_interp = plperl_init_interp();
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inited = true;
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}
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/* Each of these macros must represent a single string literal */
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#define PERLBOOT \
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"SPI::bootstrap(); use vars qw(%_SHARED);" \
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"sub ::plperl_warn { my $msg = shift; " \
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" $msg =~ s/\\(eval \\d+\\) //g; &elog(&NOTICE, $msg); } " \
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"$SIG{__WARN__} = \\&::plperl_warn; " \
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"sub ::plperl_die { my $msg = shift; " \
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" $msg =~ s/\\(eval \\d+\\) //g; die $msg; } " \
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"$SIG{__DIE__} = \\&::plperl_die; " \
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"sub ::mkfunc {" \
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" my $ret = eval(qq[ sub { $_[0] $_[1] } ]); " \
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" $@ =~ s/\\(eval \\d+\\) //g if $@; return $ret; }" \
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"use strict; " \
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"sub ::mk_strict_func {" \
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" my $ret = eval(qq[ sub { use strict; $_[0] $_[1] } ]); " \
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" $@ =~ s/\\(eval \\d+\\) //g if $@; return $ret; } " \
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"sub ::_plperl_to_pg_array {" \
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" my $arg = shift; ref $arg eq 'ARRAY' || return $arg; " \
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" my $res = ''; my $first = 1; " \
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" foreach my $elem (@$arg) " \
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" { " \
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" $res .= ', ' unless $first; $first = undef; " \
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" if (ref $elem) " \
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" { " \
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" $res .= _plperl_to_pg_array($elem); " \
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" } " \
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" elsif (defined($elem)) " \
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" { " \
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" my $str = qq($elem); " \
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" $str =~ s/([\"\\\\])/\\\\$1/g; " \
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" $res .= qq(\"$str\"); " \
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" } " \
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" else " \
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" { "\
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" $res .= 'NULL' ; " \
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" } "\
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" } " \
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" return qq({$res}); " \
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"} "
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#define PLC_TRUSTED \
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"require strict; "
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static void
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set_interp_require(bool trusted)
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{
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if (trusted)
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{
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PL_ppaddr[OP_REQUIRE] = pp_require_safe;
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PL_ppaddr[OP_DOFILE] = pp_require_safe;
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}
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else
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{
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PL_ppaddr[OP_REQUIRE] = pp_require_orig;
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PL_ppaddr[OP_DOFILE] = pp_require_orig;
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}
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}
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/*
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* Select and activate an appropriate Perl interpreter.
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*/
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static void
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select_perl_context(bool trusted)
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{
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Oid user_id;
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plperl_interp_desc *interp_desc;
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bool found;
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PerlInterpreter *interp = NULL;
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/* Find or create the interpreter hashtable entry for this userid */
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if (trusted)
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user_id = GetUserId();
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else
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user_id = InvalidOid;
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interp_desc = hash_search(plperl_interp_hash, &user_id,
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HASH_ENTER,
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&found);
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if (!found)
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{
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/* Initialize newly-created hashtable entry */
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interp_desc->interp = NULL;
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interp_desc->query_hash = NULL;
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}
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/* Make sure we have a query_hash for this interpreter */
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if (interp_desc->query_hash == NULL)
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{
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HASHCTL hash_ctl;
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memset(&hash_ctl, 0, sizeof(hash_ctl));
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hash_ctl.keysize = NAMEDATALEN;
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hash_ctl.entrysize = sizeof(plperl_query_entry);
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interp_desc->query_hash = hash_create("PL/Perl queries",
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32,
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&hash_ctl,
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HASH_ELEM);
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}
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|
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/*
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* Quick exit if already have an interpreter
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*/
|
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if (interp_desc->interp)
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{
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activate_interpreter(interp_desc);
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return;
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}
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|
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/*
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* adopt held interp if free, else create new one if possible
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*/
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if (plperl_held_interp != NULL)
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{
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/* first actual use of a perl interpreter */
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interp = plperl_held_interp;
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|
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/*
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* Reset the plperl_held_interp pointer first; if we fail during init
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* we don't want to try again with the partially-initialized interp.
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*/
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plperl_held_interp = NULL;
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if (trusted)
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plperl_trusted_init();
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else
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plperl_untrusted_init();
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}
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else
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{
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#ifdef MULTIPLICITY
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/*
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|
* plperl_init_interp will change Perl's idea of the active
|
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* interpreter. Reset plperl_active_interp temporarily, so that if we
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* hit an error partway through here, we'll make sure to switch back
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* to a non-broken interpreter before running any other Perl
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* functions.
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*/
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plperl_active_interp = NULL;
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/* Now build the new interpreter */
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interp = plperl_init_interp();
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if (trusted)
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plperl_trusted_init();
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else
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plperl_untrusted_init();
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#else
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elog(ERROR,
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"cannot allocate multiple Perl interpreters on this platform");
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#endif
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}
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set_interp_require(trusted);
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|
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/* Fully initialized, so mark the hashtable entry valid */
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interp_desc->interp = interp;
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/* And mark this as the active interpreter */
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plperl_active_interp = interp_desc;
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|
}
|
|
|
|
/*
|
|
* Make the specified interpreter the active one
|
|
*
|
|
* A call with NULL does nothing. This is so that "restoring" to a previously
|
|
* null state of plperl_active_interp doesn't result in useless thrashing.
|
|
*/
|
|
static void
|
|
activate_interpreter(plperl_interp_desc *interp_desc)
|
|
{
|
|
if (interp_desc && plperl_active_interp != interp_desc)
|
|
{
|
|
Assert(interp_desc->interp);
|
|
PERL_SET_CONTEXT(interp_desc->interp);
|
|
/* trusted iff user_id isn't InvalidOid */
|
|
set_interp_require(OidIsValid(interp_desc->user_id));
|
|
plperl_active_interp = interp_desc;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Create a new Perl interpreter.
|
|
*
|
|
* We initialize the interpreter as far as we can without knowing whether
|
|
* it will become a trusted or untrusted interpreter; in particular, the
|
|
* plperl.on_init code will get executed. Later, either plperl_trusted_init
|
|
* or plperl_untrusted_init must be called to complete the initialization.
|
|
*/
|
|
static PerlInterpreter *
|
|
plperl_init_interp(void)
|
|
{
|
|
PerlInterpreter *plperl;
|
|
static int perl_sys_init_done;
|
|
|
|
static char *embedding[3] = {
|
|
"", "-e", PERLBOOT
|
|
};
|
|
int nargs = 3;
|
|
|
|
#ifdef WIN32
|
|
|
|
/*
|
|
* The perl library on startup does horrible things like call
|
|
* setlocale(LC_ALL,""). We have protected against that on most platforms
|
|
* by setting the environment appropriately. However, on Windows,
|
|
* setlocale() does not consult the environment, so we need to save the
|
|
* existing locale settings before perl has a chance to mangle them and
|
|
* restore them after its dirty deeds are done.
|
|
*
|
|
* MSDN ref:
|
|
* http://msdn.microsoft.com/library/en-us/vclib/html/_crt_locale.asp
|
|
*
|
|
* It appears that we only need to do this on interpreter startup, and
|
|
* subsequent calls to the interpreter don't mess with the locale
|
|
* settings.
|
|
*
|
|
* We restore them using Perl's perl_setlocale() function so that Perl
|
|
* doesn't have a different idea of the locale from Postgres.
|
|
*
|
|
*/
|
|
|
|
char *loc;
|
|
char *save_collate,
|
|
*save_ctype,
|
|
*save_monetary,
|
|
*save_numeric,
|
|
*save_time;
|
|
|
|
loc = setlocale(LC_COLLATE, NULL);
|
|
save_collate = loc ? pstrdup(loc) : NULL;
|
|
loc = setlocale(LC_CTYPE, NULL);
|
|
save_ctype = loc ? pstrdup(loc) : NULL;
|
|
loc = setlocale(LC_MONETARY, NULL);
|
|
save_monetary = loc ? pstrdup(loc) : NULL;
|
|
loc = setlocale(LC_NUMERIC, NULL);
|
|
save_numeric = loc ? pstrdup(loc) : NULL;
|
|
loc = setlocale(LC_TIME, NULL);
|
|
save_time = loc ? pstrdup(loc) : NULL;
|
|
|
|
#define PLPERL_RESTORE_LOCALE(name, saved) \
|
|
STMT_START { \
|
|
if (saved != NULL) { setlocale_perl(name, saved); pfree(saved); } \
|
|
} STMT_END
|
|
#endif
|
|
|
|
/****
|
|
* The perl API docs state that PERL_SYS_INIT3 should be called before
|
|
* allocating interprters. Unfortunately, on some platforms this fails
|
|
* in the Perl_do_taint() routine, which is called when the platform is
|
|
* using the system's malloc() instead of perl's own. Other platforms,
|
|
* notably Windows, fail if PERL_SYS_INIT3 is not called. So we call it
|
|
* if it's available, unless perl is using the system malloc(), which is
|
|
* true when MYMALLOC is set.
|
|
*/
|
|
#if defined(PERL_SYS_INIT3) && !defined(MYMALLOC)
|
|
/* only call this the first time through, as per perlembed man page */
|
|
if (!perl_sys_init_done)
|
|
{
|
|
char *dummy_env[1] = {NULL};
|
|
|
|
PERL_SYS_INIT3(&nargs, (char ***) &embedding, (char ***) &dummy_env);
|
|
|
|
/*
|
|
* For unclear reasons, PERL_SYS_INIT3 sets the SIGFPE handler to
|
|
* SIG_IGN. Aside from being extremely unfriendly behavior for a
|
|
* library, this is dumb on the grounds that the results of a
|
|
* SIGFPE in this state are undefined according to POSIX, and in
|
|
* fact you get a forced process kill at least on Linux. Hence,
|
|
* restore the SIGFPE handler to the backend's standard setting.
|
|
* (See Perl bug 114574 for more information.)
|
|
*/
|
|
pqsignal(SIGFPE, FloatExceptionHandler);
|
|
|
|
perl_sys_init_done = 1;
|
|
/* quiet warning if PERL_SYS_INIT3 doesn't use the third argument */
|
|
dummy_env[0] = NULL;
|
|
}
|
|
#endif
|
|
|
|
plperl = perl_alloc();
|
|
if (!plperl)
|
|
elog(ERROR, "could not allocate Perl interpreter");
|
|
|
|
PERL_SET_CONTEXT(plperl);
|
|
perl_construct(plperl);
|
|
|
|
/*
|
|
* Record the original function for the 'require' and 'dofile' opcodes.
|
|
* (They share the same implementation.) Ensure it's used for new
|
|
* interpreters.
|
|
*/
|
|
if (!pp_require_orig)
|
|
pp_require_orig = PL_ppaddr[OP_REQUIRE];
|
|
else
|
|
{
|
|
PL_ppaddr[OP_REQUIRE] = pp_require_orig;
|
|
PL_ppaddr[OP_DOFILE] = pp_require_orig;
|
|
}
|
|
|
|
if (perl_parse(plperl, plperl_init_shared_libs,
|
|
nargs, embedding, NULL) != 0)
|
|
ereport(ERROR,
|
|
(errmsg("%s", strip_trailing_ws(SvPV_nolen(ERRSV))),
|
|
errcontext("while parsing Perl initialization")));
|
|
|
|
if (perl_run(plperl) != 0)
|
|
ereport(ERROR,
|
|
(errmsg("%s", strip_trailing_ws(SvPV_nolen(ERRSV))),
|
|
errcontext("while running Perl initialization")));
|
|
|
|
#ifdef PLPERL_RESTORE_LOCALE
|
|
PLPERL_RESTORE_LOCALE(LC_COLLATE, save_collate);
|
|
PLPERL_RESTORE_LOCALE(LC_CTYPE, save_ctype);
|
|
PLPERL_RESTORE_LOCALE(LC_MONETARY, save_monetary);
|
|
PLPERL_RESTORE_LOCALE(LC_NUMERIC, save_numeric);
|
|
PLPERL_RESTORE_LOCALE(LC_TIME, save_time);
|
|
#endif
|
|
|
|
return plperl;
|
|
}
|
|
|
|
|
|
/*
|
|
* Our safe implementation of the require opcode.
|
|
* This is safe because it's completely unable to load any code.
|
|
* If the requested file/module has already been loaded it'll return true.
|
|
* If not, it'll die.
|
|
* So now "use Foo;" will work iff Foo has already been loaded.
|
|
*/
|
|
static OP *
|
|
pp_require_safe(pTHX)
|
|
{
|
|
dVAR;
|
|
dSP;
|
|
SV *sv,
|
|
**svp;
|
|
char *name;
|
|
STRLEN len;
|
|
|
|
sv = POPs;
|
|
name = SvPV(sv, len);
|
|
if (!(name && len > 0 && *name))
|
|
RETPUSHNO;
|
|
|
|
svp = hv_fetch(GvHVn(PL_incgv), name, len, 0);
|
|
if (svp && *svp != &PL_sv_undef)
|
|
RETPUSHYES;
|
|
|
|
DIE(aTHX_ "Unable to load %s into plperl", name);
|
|
}
|
|
|
|
/*
|
|
* Initialize the current Perl interpreter as a trusted interp
|
|
*/
|
|
static void
|
|
plperl_trusted_init(void)
|
|
{
|
|
HV *stash;
|
|
SV *sv;
|
|
char *key;
|
|
I32 klen;
|
|
|
|
/* use original require while we set up */
|
|
PL_ppaddr[OP_REQUIRE] = pp_require_orig;
|
|
PL_ppaddr[OP_DOFILE] = pp_require_orig;
|
|
|
|
eval_pv(PLC_TRUSTED, FALSE);
|
|
if (SvTRUE(ERRSV))
|
|
ereport(ERROR,
|
|
(errmsg("%s", strip_trailing_ws(SvPV_nolen(ERRSV))),
|
|
errcontext("while executing PLC_TRUSTED")));
|
|
|
|
if (GetDatabaseEncoding() == PG_UTF8)
|
|
{
|
|
/*
|
|
* Force loading of utf8 module now to prevent errors that can arise
|
|
* from the regex code later trying to load utf8 modules. See
|
|
* http://rt.perl.org/rt3/Ticket/Display.html?id=47576
|
|
*/
|
|
eval_pv("my $a=chr(0x100); return $a =~ /\\xa9/i", FALSE);
|
|
if (SvTRUE(ERRSV))
|
|
ereport(ERROR,
|
|
(errmsg("%s", strip_trailing_ws(SvPV_nolen(ERRSV))),
|
|
errcontext("while executing utf8fix")));
|
|
}
|
|
|
|
/*
|
|
* Lock down the interpreter
|
|
*/
|
|
|
|
/* switch to the safe require/dofile opcode for future code */
|
|
PL_ppaddr[OP_REQUIRE] = pp_require_safe;
|
|
PL_ppaddr[OP_DOFILE] = pp_require_safe;
|
|
|
|
/*
|
|
* prevent (any more) unsafe opcodes being compiled
|
|
* PL_op_mask is per interpreter, so this only needs to be set once
|
|
*/
|
|
PL_op_mask = plperl_opmask;
|
|
|
|
/* delete the DynaLoader:: namespace so extensions can't be loaded */
|
|
stash = gv_stashpv("DynaLoader", GV_ADDWARN);
|
|
hv_iterinit(stash);
|
|
while ((sv = hv_iternextsv(stash, &key, &klen)))
|
|
{
|
|
if (!isGV_with_GP(sv) || !GvCV(sv))
|
|
continue;
|
|
SvREFCNT_dec(GvCV(sv)); /* free the CV */
|
|
GvCV_set(sv, NULL); /* prevent call via GV */
|
|
}
|
|
hv_clear(stash);
|
|
/* invalidate assorted caches */
|
|
++PL_sub_generation;
|
|
#ifdef PL_stashcache
|
|
hv_clear(PL_stashcache);
|
|
#endif
|
|
}
|
|
|
|
|
|
/*
|
|
* Initialize the current Perl interpreter as an untrusted interp
|
|
*/
|
|
static void
|
|
plperl_untrusted_init(void)
|
|
{
|
|
/*
|
|
* Nothing to do here
|
|
*/
|
|
}
|
|
|
|
|
|
/*
|
|
* Perl likes to put a newline after its error messages; clean up such
|
|
*/
|
|
static char *
|
|
strip_trailing_ws(const char *msg)
|
|
{
|
|
char *res = pstrdup(msg);
|
|
int len = strlen(res);
|
|
|
|
while (len > 0 && isspace((unsigned char) res[len - 1]))
|
|
res[--len] = '\0';
|
|
return res;
|
|
}
|
|
|
|
|
|
/* Build a tuple from a hash. */
|
|
|
|
static HeapTuple
|
|
plperl_build_tuple_result(HV *perlhash, AttInMetadata *attinmeta)
|
|
{
|
|
TupleDesc td = attinmeta->tupdesc;
|
|
char **values;
|
|
SV *val;
|
|
char *key;
|
|
I32 klen;
|
|
HeapTuple tup;
|
|
|
|
values = (char **) palloc0(td->natts * sizeof(char *));
|
|
|
|
hv_iterinit(perlhash);
|
|
while ((val = hv_iternextsv(perlhash, &key, &klen)))
|
|
{
|
|
int attn = SPI_fnumber(td, key);
|
|
|
|
if (attn <= 0 || td->attrs[attn - 1]->attisdropped)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_UNDEFINED_COLUMN),
|
|
errmsg("Perl hash contains nonexistent column \"%s\"",
|
|
key)));
|
|
if (SvOK(val))
|
|
values[attn - 1] = SvPV(val, PL_na);
|
|
}
|
|
hv_iterinit(perlhash);
|
|
|
|
tup = BuildTupleFromCStrings(attinmeta, values);
|
|
pfree(values);
|
|
return tup;
|
|
}
|
|
|
|
/*
|
|
* convert perl array to postgres string representation
|
|
*/
|
|
static SV *
|
|
plperl_convert_to_pg_array(SV *src)
|
|
{
|
|
SV *rv;
|
|
int count;
|
|
|
|
dSP;
|
|
|
|
PUSHMARK(SP);
|
|
XPUSHs(src);
|
|
PUTBACK;
|
|
|
|
count = call_pv("::_plperl_to_pg_array", G_SCALAR);
|
|
|
|
SPAGAIN;
|
|
|
|
if (count != 1)
|
|
elog(ERROR, "unexpected _plperl_to_pg_array failure");
|
|
|
|
rv = POPs;
|
|
|
|
PUTBACK;
|
|
|
|
return rv;
|
|
}
|
|
|
|
|
|
/* Set up the arguments for a trigger call. */
|
|
|
|
static SV *
|
|
plperl_trigger_build_args(FunctionCallInfo fcinfo)
|
|
{
|
|
TriggerData *tdata;
|
|
TupleDesc tupdesc;
|
|
int i;
|
|
char *level;
|
|
char *event;
|
|
char *relid;
|
|
char *when;
|
|
HV *hv;
|
|
|
|
hv = newHV();
|
|
|
|
tdata = (TriggerData *) fcinfo->context;
|
|
tupdesc = tdata->tg_relation->rd_att;
|
|
|
|
relid = DatumGetCString(
|
|
DirectFunctionCall1(oidout,
|
|
ObjectIdGetDatum(tdata->tg_relation->rd_id)
|
|
)
|
|
);
|
|
|
|
hv_store_string(hv, "name", newSVstring(tdata->tg_trigger->tgname));
|
|
hv_store_string(hv, "relid", newSVstring(relid));
|
|
|
|
if (TRIGGER_FIRED_BY_INSERT(tdata->tg_event))
|
|
{
|
|
event = "INSERT";
|
|
if (TRIGGER_FIRED_FOR_ROW(tdata->tg_event))
|
|
hv_store_string(hv, "new",
|
|
plperl_hash_from_tuple(tdata->tg_trigtuple,
|
|
tupdesc));
|
|
}
|
|
else if (TRIGGER_FIRED_BY_DELETE(tdata->tg_event))
|
|
{
|
|
event = "DELETE";
|
|
if (TRIGGER_FIRED_FOR_ROW(tdata->tg_event))
|
|
hv_store_string(hv, "old",
|
|
plperl_hash_from_tuple(tdata->tg_trigtuple,
|
|
tupdesc));
|
|
}
|
|
else if (TRIGGER_FIRED_BY_UPDATE(tdata->tg_event))
|
|
{
|
|
event = "UPDATE";
|
|
if (TRIGGER_FIRED_FOR_ROW(tdata->tg_event))
|
|
{
|
|
hv_store_string(hv, "old",
|
|
plperl_hash_from_tuple(tdata->tg_trigtuple,
|
|
tupdesc));
|
|
hv_store_string(hv, "new",
|
|
plperl_hash_from_tuple(tdata->tg_newtuple,
|
|
tupdesc));
|
|
}
|
|
}
|
|
else if (TRIGGER_FIRED_BY_TRUNCATE(tdata->tg_event))
|
|
event = "TRUNCATE";
|
|
else
|
|
event = "UNKNOWN";
|
|
|
|
hv_store_string(hv, "event", newSVstring(event));
|
|
hv_store_string(hv, "argc", newSViv(tdata->tg_trigger->tgnargs));
|
|
|
|
if (tdata->tg_trigger->tgnargs > 0)
|
|
{
|
|
AV *av = newAV();
|
|
|
|
for (i = 0; i < tdata->tg_trigger->tgnargs; i++)
|
|
av_push(av, newSVstring(tdata->tg_trigger->tgargs[i]));
|
|
hv_store_string(hv, "args", newRV_noinc((SV *) av));
|
|
}
|
|
|
|
hv_store_string(hv, "relname",
|
|
newSVstring(SPI_getrelname(tdata->tg_relation)));
|
|
|
|
hv_store_string(hv, "table_name",
|
|
newSVstring(SPI_getrelname(tdata->tg_relation)));
|
|
|
|
hv_store_string(hv, "table_schema",
|
|
newSVstring(SPI_getnspname(tdata->tg_relation)));
|
|
|
|
if (TRIGGER_FIRED_BEFORE(tdata->tg_event))
|
|
when = "BEFORE";
|
|
else if (TRIGGER_FIRED_AFTER(tdata->tg_event))
|
|
when = "AFTER";
|
|
else
|
|
when = "UNKNOWN";
|
|
hv_store_string(hv, "when", newSVstring(when));
|
|
|
|
if (TRIGGER_FIRED_FOR_ROW(tdata->tg_event))
|
|
level = "ROW";
|
|
else if (TRIGGER_FIRED_FOR_STATEMENT(tdata->tg_event))
|
|
level = "STATEMENT";
|
|
else
|
|
level = "UNKNOWN";
|
|
hv_store_string(hv, "level", newSVstring(level));
|
|
|
|
return newRV_noinc((SV *) hv);
|
|
}
|
|
|
|
|
|
/* Set up the new tuple returned from a trigger. */
|
|
|
|
static HeapTuple
|
|
plperl_modify_tuple(HV *hvTD, TriggerData *tdata, HeapTuple otup)
|
|
{
|
|
SV **svp;
|
|
HV *hvNew;
|
|
HeapTuple rtup;
|
|
SV *val;
|
|
char *key;
|
|
I32 klen;
|
|
int slotsused;
|
|
int *modattrs;
|
|
Datum *modvalues;
|
|
char *modnulls;
|
|
|
|
TupleDesc tupdesc;
|
|
|
|
tupdesc = tdata->tg_relation->rd_att;
|
|
|
|
svp = hv_fetch_string(hvTD, "new");
|
|
if (!svp)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_UNDEFINED_COLUMN),
|
|
errmsg("$_TD->{new} does not exist")));
|
|
if (!SvOK(*svp) || !SvROK(*svp) || SvTYPE(SvRV(*svp)) != SVt_PVHV)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_DATATYPE_MISMATCH),
|
|
errmsg("$_TD->{new} is not a hash reference")));
|
|
hvNew = (HV *) SvRV(*svp);
|
|
|
|
modattrs = palloc(tupdesc->natts * sizeof(int));
|
|
modvalues = palloc(tupdesc->natts * sizeof(Datum));
|
|
modnulls = palloc(tupdesc->natts * sizeof(char));
|
|
slotsused = 0;
|
|
|
|
hv_iterinit(hvNew);
|
|
while ((val = hv_iternextsv(hvNew, &key, &klen)))
|
|
{
|
|
int attn = SPI_fnumber(tupdesc, key);
|
|
Oid typinput;
|
|
Oid typioparam;
|
|
int32 atttypmod;
|
|
FmgrInfo finfo;
|
|
|
|
if (attn <= 0 || tupdesc->attrs[attn - 1]->attisdropped)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_UNDEFINED_COLUMN),
|
|
errmsg("Perl hash contains nonexistent column \"%s\"",
|
|
key)));
|
|
/* XXX would be better to cache these lookups */
|
|
getTypeInputInfo(tupdesc->attrs[attn - 1]->atttypid,
|
|
&typinput, &typioparam);
|
|
fmgr_info(typinput, &finfo);
|
|
atttypmod = tupdesc->attrs[attn - 1]->atttypmod;
|
|
if (SvOK(val))
|
|
{
|
|
modvalues[slotsused] = InputFunctionCall(&finfo,
|
|
SvPV(val, PL_na),
|
|
typioparam,
|
|
atttypmod);
|
|
modnulls[slotsused] = ' ';
|
|
}
|
|
else
|
|
{
|
|
modvalues[slotsused] = InputFunctionCall(&finfo,
|
|
NULL,
|
|
typioparam,
|
|
atttypmod);
|
|
modnulls[slotsused] = 'n';
|
|
}
|
|
modattrs[slotsused] = attn;
|
|
slotsused++;
|
|
}
|
|
hv_iterinit(hvNew);
|
|
|
|
rtup = SPI_modifytuple(tdata->tg_relation, otup, slotsused,
|
|
modattrs, modvalues, modnulls);
|
|
|
|
pfree(modattrs);
|
|
pfree(modvalues);
|
|
pfree(modnulls);
|
|
|
|
if (rtup == NULL)
|
|
elog(ERROR, "SPI_modifytuple failed: %s",
|
|
SPI_result_code_string(SPI_result));
|
|
|
|
return rtup;
|
|
}
|
|
|
|
|
|
/*
|
|
* This is the only externally-visible part of the plperl call interface.
|
|
* The Postgres function and trigger managers call it to execute a
|
|
* perl function.
|
|
*/
|
|
PG_FUNCTION_INFO_V1(plperl_call_handler);
|
|
|
|
Datum
|
|
plperl_call_handler(PG_FUNCTION_ARGS)
|
|
{
|
|
Datum retval;
|
|
plperl_call_data *save_call_data = current_call_data;
|
|
plperl_interp_desc *oldinterp = plperl_active_interp;
|
|
plperl_call_data this_call_data;
|
|
|
|
/* Initialize current-call status record */
|
|
MemSet(&this_call_data, 0, sizeof(this_call_data));
|
|
this_call_data.fcinfo = fcinfo;
|
|
|
|
PG_TRY();
|
|
{
|
|
current_call_data = &this_call_data;
|
|
if (CALLED_AS_TRIGGER(fcinfo))
|
|
retval = PointerGetDatum(plperl_trigger_handler(fcinfo));
|
|
else
|
|
retval = plperl_func_handler(fcinfo);
|
|
}
|
|
PG_CATCH();
|
|
{
|
|
if (this_call_data.prodesc)
|
|
decrement_prodesc_refcount(this_call_data.prodesc);
|
|
current_call_data = save_call_data;
|
|
activate_interpreter(oldinterp);
|
|
PG_RE_THROW();
|
|
}
|
|
PG_END_TRY();
|
|
|
|
if (this_call_data.prodesc)
|
|
decrement_prodesc_refcount(this_call_data.prodesc);
|
|
current_call_data = save_call_data;
|
|
activate_interpreter(oldinterp);
|
|
return retval;
|
|
}
|
|
|
|
/*
|
|
* This is the other externally visible function - it is called when CREATE
|
|
* FUNCTION is issued to validate the function being created/replaced.
|
|
*/
|
|
PG_FUNCTION_INFO_V1(plperl_validator);
|
|
|
|
Datum
|
|
plperl_validator(PG_FUNCTION_ARGS)
|
|
{
|
|
Oid funcoid = PG_GETARG_OID(0);
|
|
HeapTuple tuple;
|
|
Form_pg_proc proc;
|
|
char functyptype;
|
|
int numargs;
|
|
Oid *argtypes;
|
|
char **argnames;
|
|
char *argmodes;
|
|
bool istrigger = false;
|
|
int i;
|
|
|
|
/* Get the new function's pg_proc entry */
|
|
tuple = SearchSysCache(PROCOID,
|
|
ObjectIdGetDatum(funcoid),
|
|
0, 0, 0);
|
|
if (!HeapTupleIsValid(tuple))
|
|
elog(ERROR, "cache lookup failed for function %u", funcoid);
|
|
proc = (Form_pg_proc) GETSTRUCT(tuple);
|
|
|
|
functyptype = get_typtype(proc->prorettype);
|
|
|
|
/* Disallow pseudotype result */
|
|
/* except for TRIGGER, RECORD, or VOID */
|
|
if (functyptype == TYPTYPE_PSEUDO)
|
|
{
|
|
/* we assume OPAQUE with no arguments means a trigger */
|
|
if (proc->prorettype == TRIGGEROID ||
|
|
(proc->prorettype == OPAQUEOID && proc->pronargs == 0))
|
|
istrigger = true;
|
|
else if (proc->prorettype != RECORDOID &&
|
|
proc->prorettype != VOIDOID)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("PL/Perl functions cannot return type %s",
|
|
format_type_be(proc->prorettype))));
|
|
}
|
|
|
|
/* Disallow pseudotypes in arguments (either IN or OUT) */
|
|
numargs = get_func_arg_info(tuple,
|
|
&argtypes, &argnames, &argmodes);
|
|
for (i = 0; i < numargs; i++)
|
|
{
|
|
if (get_typtype(argtypes[i]) == TYPTYPE_PSEUDO)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("PL/Perl functions cannot accept type %s",
|
|
format_type_be(argtypes[i]))));
|
|
}
|
|
|
|
ReleaseSysCache(tuple);
|
|
|
|
/* Postpone body checks if !check_function_bodies */
|
|
if (check_function_bodies)
|
|
{
|
|
(void) compile_plperl_function(funcoid, istrigger);
|
|
}
|
|
|
|
/* the result of a validator is ignored */
|
|
PG_RETURN_VOID();
|
|
}
|
|
|
|
|
|
/*
|
|
* Uses mkfunc to create an anonymous sub whose text is
|
|
* supplied in s, and returns a reference to the closure.
|
|
*/
|
|
static void
|
|
plperl_create_sub(plperl_proc_desc *prodesc, char *s, Oid fn_oid)
|
|
{
|
|
dSP;
|
|
char subname[NAMEDATALEN + 40];
|
|
SV *subref;
|
|
int count;
|
|
char *compile_sub;
|
|
|
|
sprintf(subname, "%s__%u", prodesc->proname, fn_oid);
|
|
|
|
ENTER;
|
|
SAVETMPS;
|
|
PUSHMARK(SP);
|
|
XPUSHs(sv_2mortal(newSVstring("our $_TD; local $_TD=$_[0]; shift;")));
|
|
XPUSHs(sv_2mortal(newSVstring(s)));
|
|
PUTBACK;
|
|
|
|
/*
|
|
* G_KEEPERR seems to be needed here, else we don't recognize compile
|
|
* errors properly. Perhaps it's because there's another level of eval
|
|
* inside mksafefunc?
|
|
*/
|
|
|
|
if (plperl_use_strict)
|
|
compile_sub = "::mk_strict_func";
|
|
else
|
|
compile_sub = "::mkfunc";
|
|
|
|
count = perl_call_pv(compile_sub, G_SCALAR | G_EVAL | G_KEEPERR);
|
|
SPAGAIN;
|
|
|
|
if (count != 1)
|
|
{
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
elog(ERROR, "didn't get a return item from mksafefunc");
|
|
}
|
|
|
|
if (SvTRUE(ERRSV))
|
|
{
|
|
(void) POPs;
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_SYNTAX_ERROR),
|
|
errmsg("creation of Perl function \"%s\" failed: %s",
|
|
prodesc->proname,
|
|
strip_trailing_ws(SvPV(ERRSV, PL_na)))));
|
|
}
|
|
|
|
/*
|
|
* need to make a deep copy of the return. it comes off the stack as a
|
|
* temporary.
|
|
*/
|
|
subref = newSVsv(POPs);
|
|
|
|
if (!SvROK(subref) || SvTYPE(SvRV(subref)) != SVt_PVCV)
|
|
{
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
|
|
/*
|
|
* subref is our responsibility because it is not mortal
|
|
*/
|
|
SvREFCNT_dec(subref);
|
|
elog(ERROR, "didn't get a code ref");
|
|
}
|
|
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
|
|
prodesc->reference = subref;
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* plperl_init_shared_libs() -
|
|
*
|
|
* We cannot use the DynaLoader directly to get at the Opcode
|
|
* module. So, we link Opcode into ourselves
|
|
* and do the initialization behind perl's back.
|
|
*
|
|
**********************************************************************/
|
|
static void
|
|
plperl_init_shared_libs(pTHX)
|
|
{
|
|
char *file = __FILE__;
|
|
|
|
newXS("DynaLoader::boot_DynaLoader", boot_DynaLoader, file);
|
|
newXS("SPI::bootstrap", boot_SPI, file);
|
|
}
|
|
|
|
|
|
static SV *
|
|
plperl_call_perl_func(plperl_proc_desc *desc, FunctionCallInfo fcinfo)
|
|
{
|
|
dSP;
|
|
SV *retval;
|
|
int i;
|
|
int count;
|
|
SV *sv;
|
|
|
|
ENTER;
|
|
SAVETMPS;
|
|
|
|
PUSHMARK(SP);
|
|
|
|
XPUSHs(&PL_sv_undef); /* no trigger data */
|
|
|
|
for (i = 0; i < desc->nargs; i++)
|
|
{
|
|
if (fcinfo->argnull[i])
|
|
XPUSHs(&PL_sv_undef);
|
|
else if (desc->arg_is_rowtype[i])
|
|
{
|
|
HeapTupleHeader td;
|
|
Oid tupType;
|
|
int32 tupTypmod;
|
|
TupleDesc tupdesc;
|
|
HeapTupleData tmptup;
|
|
SV *hashref;
|
|
|
|
td = DatumGetHeapTupleHeader(fcinfo->arg[i]);
|
|
/* Extract rowtype info and find a tupdesc */
|
|
tupType = HeapTupleHeaderGetTypeId(td);
|
|
tupTypmod = HeapTupleHeaderGetTypMod(td);
|
|
tupdesc = lookup_rowtype_tupdesc(tupType, tupTypmod);
|
|
/* Build a temporary HeapTuple control structure */
|
|
tmptup.t_len = HeapTupleHeaderGetDatumLength(td);
|
|
tmptup.t_data = td;
|
|
|
|
hashref = plperl_hash_from_tuple(&tmptup, tupdesc);
|
|
XPUSHs(sv_2mortal(hashref));
|
|
ReleaseTupleDesc(tupdesc);
|
|
}
|
|
else
|
|
{
|
|
char *tmp;
|
|
|
|
tmp = OutputFunctionCall(&(desc->arg_out_func[i]),
|
|
fcinfo->arg[i]);
|
|
sv = newSVstring(tmp);
|
|
XPUSHs(sv_2mortal(sv));
|
|
pfree(tmp);
|
|
}
|
|
}
|
|
PUTBACK;
|
|
|
|
/* Do NOT use G_KEEPERR here */
|
|
count = perl_call_sv(desc->reference, G_SCALAR | G_EVAL);
|
|
|
|
SPAGAIN;
|
|
|
|
if (count != 1)
|
|
{
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
elog(ERROR, "didn't get a return item from function");
|
|
}
|
|
|
|
if (SvTRUE(ERRSV))
|
|
{
|
|
(void) POPs;
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
/* XXX need to find a way to assign an errcode here */
|
|
ereport(ERROR,
|
|
(errmsg("error from Perl function \"%s\": %s",
|
|
desc->proname,
|
|
strip_trailing_ws(SvPV(ERRSV, PL_na)))));
|
|
}
|
|
|
|
retval = newSVsv(POPs);
|
|
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
|
|
return retval;
|
|
}
|
|
|
|
|
|
static SV *
|
|
plperl_call_perl_trigger_func(plperl_proc_desc *desc, FunctionCallInfo fcinfo,
|
|
SV *td)
|
|
{
|
|
dSP;
|
|
SV *retval;
|
|
Trigger *tg_trigger;
|
|
int i;
|
|
int count;
|
|
|
|
ENTER;
|
|
SAVETMPS;
|
|
|
|
PUSHMARK(sp);
|
|
|
|
XPUSHs(td);
|
|
|
|
tg_trigger = ((TriggerData *) fcinfo->context)->tg_trigger;
|
|
for (i = 0; i < tg_trigger->tgnargs; i++)
|
|
XPUSHs(sv_2mortal(newSVstring(tg_trigger->tgargs[i])));
|
|
PUTBACK;
|
|
|
|
/* Do NOT use G_KEEPERR here */
|
|
count = perl_call_sv(desc->reference, G_SCALAR | G_EVAL);
|
|
|
|
SPAGAIN;
|
|
|
|
if (count != 1)
|
|
{
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
elog(ERROR, "didn't get a return item from trigger function");
|
|
}
|
|
|
|
if (SvTRUE(ERRSV))
|
|
{
|
|
(void) POPs;
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
/* XXX need to find a way to assign an errcode here */
|
|
ereport(ERROR,
|
|
(errmsg("error from Perl function \"%s\": %s",
|
|
desc->proname,
|
|
strip_trailing_ws(SvPV(ERRSV, PL_na)))));
|
|
}
|
|
|
|
retval = newSVsv(POPs);
|
|
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
|
|
return retval;
|
|
}
|
|
|
|
|
|
static Datum
|
|
plperl_func_handler(PG_FUNCTION_ARGS)
|
|
{
|
|
plperl_proc_desc *prodesc;
|
|
SV *perlret;
|
|
Datum retval;
|
|
ReturnSetInfo *rsi;
|
|
SV *array_ret = NULL;
|
|
|
|
if (SPI_connect() != SPI_OK_CONNECT)
|
|
elog(ERROR, "could not connect to SPI manager");
|
|
|
|
prodesc = compile_plperl_function(fcinfo->flinfo->fn_oid, false);
|
|
current_call_data->prodesc = prodesc;
|
|
increment_prodesc_refcount(prodesc);
|
|
|
|
rsi = (ReturnSetInfo *) fcinfo->resultinfo;
|
|
|
|
if (prodesc->fn_retisset)
|
|
{
|
|
/* Check context before allowing the call to go through */
|
|
if (!rsi || !IsA(rsi, ReturnSetInfo) ||
|
|
(rsi->allowedModes & SFRM_Materialize) == 0 ||
|
|
rsi->expectedDesc == NULL)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("set-valued function called in context that "
|
|
"cannot accept a set")));
|
|
}
|
|
|
|
activate_interpreter(prodesc->interp);
|
|
|
|
perlret = plperl_call_perl_func(prodesc, fcinfo);
|
|
|
|
/************************************************************
|
|
* Disconnect from SPI manager and then create the return
|
|
* values datum (if the input function does a palloc for it
|
|
* this must not be allocated in the SPI memory context
|
|
* because SPI_finish would free it).
|
|
************************************************************/
|
|
if (SPI_finish() != SPI_OK_FINISH)
|
|
elog(ERROR, "SPI_finish() failed");
|
|
|
|
if (prodesc->fn_retisset)
|
|
{
|
|
/*
|
|
* If the Perl function returned an arrayref, we pretend that it
|
|
* called return_next() for each element of the array, to handle old
|
|
* SRFs that didn't know about return_next(). Any other sort of return
|
|
* value is an error, except undef which means return an empty set.
|
|
*/
|
|
if (SvOK(perlret) &&
|
|
SvROK(perlret) &&
|
|
SvTYPE(SvRV(perlret)) == SVt_PVAV)
|
|
{
|
|
int i = 0;
|
|
SV **svp = 0;
|
|
AV *rav = (AV *) SvRV(perlret);
|
|
|
|
while ((svp = av_fetch(rav, i, FALSE)) != NULL)
|
|
{
|
|
plperl_return_next(*svp);
|
|
i++;
|
|
}
|
|
}
|
|
else if (SvOK(perlret))
|
|
{
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_DATATYPE_MISMATCH),
|
|
errmsg("set-returning PL/Perl function must return "
|
|
"reference to array or use return_next")));
|
|
}
|
|
|
|
rsi->returnMode = SFRM_Materialize;
|
|
if (current_call_data->tuple_store)
|
|
{
|
|
rsi->setResult = current_call_data->tuple_store;
|
|
rsi->setDesc = current_call_data->ret_tdesc;
|
|
}
|
|
retval = (Datum) 0;
|
|
}
|
|
else if (!SvOK(perlret))
|
|
{
|
|
/* Return NULL if Perl code returned undef */
|
|
if (rsi && IsA(rsi, ReturnSetInfo))
|
|
rsi->isDone = ExprEndResult;
|
|
retval = InputFunctionCall(&prodesc->result_in_func, NULL,
|
|
prodesc->result_typioparam, -1);
|
|
fcinfo->isnull = true;
|
|
}
|
|
else if (prodesc->fn_retistuple)
|
|
{
|
|
/* Return a perl hash converted to a Datum */
|
|
TupleDesc td;
|
|
AttInMetadata *attinmeta;
|
|
HeapTuple tup;
|
|
|
|
if (!SvOK(perlret) || !SvROK(perlret) ||
|
|
SvTYPE(SvRV(perlret)) != SVt_PVHV)
|
|
{
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_DATATYPE_MISMATCH),
|
|
errmsg("composite-returning PL/Perl function "
|
|
"must return reference to hash")));
|
|
}
|
|
|
|
/* XXX should cache the attinmeta data instead of recomputing */
|
|
if (get_call_result_type(fcinfo, NULL, &td) != TYPEFUNC_COMPOSITE)
|
|
{
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("function returning record called in context "
|
|
"that cannot accept type record")));
|
|
}
|
|
|
|
attinmeta = TupleDescGetAttInMetadata(td);
|
|
tup = plperl_build_tuple_result((HV *) SvRV(perlret), attinmeta);
|
|
retval = HeapTupleGetDatum(tup);
|
|
}
|
|
else
|
|
{
|
|
/* Return a perl string converted to a Datum */
|
|
char *val;
|
|
|
|
if (prodesc->fn_retisarray && SvROK(perlret) &&
|
|
SvTYPE(SvRV(perlret)) == SVt_PVAV)
|
|
{
|
|
array_ret = plperl_convert_to_pg_array(perlret);
|
|
SvREFCNT_dec(perlret);
|
|
perlret = array_ret;
|
|
}
|
|
|
|
val = SvPV(perlret, PL_na);
|
|
|
|
retval = InputFunctionCall(&prodesc->result_in_func, val,
|
|
prodesc->result_typioparam, -1);
|
|
}
|
|
|
|
if (array_ret == NULL)
|
|
SvREFCNT_dec(perlret);
|
|
|
|
return retval;
|
|
}
|
|
|
|
|
|
static Datum
|
|
plperl_trigger_handler(PG_FUNCTION_ARGS)
|
|
{
|
|
plperl_proc_desc *prodesc;
|
|
SV *perlret;
|
|
Datum retval;
|
|
SV *svTD;
|
|
HV *hvTD;
|
|
|
|
/* Connect to SPI manager */
|
|
if (SPI_connect() != SPI_OK_CONNECT)
|
|
elog(ERROR, "could not connect to SPI manager");
|
|
|
|
/* Find or compile the function */
|
|
prodesc = compile_plperl_function(fcinfo->flinfo->fn_oid, true);
|
|
current_call_data->prodesc = prodesc;
|
|
increment_prodesc_refcount(prodesc);
|
|
|
|
activate_interpreter(prodesc->interp);
|
|
|
|
svTD = plperl_trigger_build_args(fcinfo);
|
|
perlret = plperl_call_perl_trigger_func(prodesc, fcinfo, svTD);
|
|
hvTD = (HV *) SvRV(svTD);
|
|
|
|
/************************************************************
|
|
* Disconnect from SPI manager and then create the return
|
|
* values datum (if the input function does a palloc for it
|
|
* this must not be allocated in the SPI memory context
|
|
* because SPI_finish would free it).
|
|
************************************************************/
|
|
if (SPI_finish() != SPI_OK_FINISH)
|
|
elog(ERROR, "SPI_finish() failed");
|
|
|
|
if (perlret == NULL || !SvOK(perlret))
|
|
{
|
|
/* undef result means go ahead with original tuple */
|
|
TriggerData *trigdata = ((TriggerData *) fcinfo->context);
|
|
|
|
if (TRIGGER_FIRED_BY_INSERT(trigdata->tg_event))
|
|
retval = (Datum) trigdata->tg_trigtuple;
|
|
else if (TRIGGER_FIRED_BY_UPDATE(trigdata->tg_event))
|
|
retval = (Datum) trigdata->tg_newtuple;
|
|
else if (TRIGGER_FIRED_BY_DELETE(trigdata->tg_event))
|
|
retval = (Datum) trigdata->tg_trigtuple;
|
|
else if (TRIGGER_FIRED_BY_TRUNCATE(trigdata->tg_event))
|
|
retval = (Datum) trigdata->tg_trigtuple;
|
|
else
|
|
retval = (Datum) 0; /* can this happen? */
|
|
}
|
|
else
|
|
{
|
|
HeapTuple trv;
|
|
char *tmp;
|
|
|
|
tmp = SvPV(perlret, PL_na);
|
|
|
|
if (pg_strcasecmp(tmp, "SKIP") == 0)
|
|
trv = NULL;
|
|
else if (pg_strcasecmp(tmp, "MODIFY") == 0)
|
|
{
|
|
TriggerData *trigdata = (TriggerData *) fcinfo->context;
|
|
|
|
if (TRIGGER_FIRED_BY_INSERT(trigdata->tg_event))
|
|
trv = plperl_modify_tuple(hvTD, trigdata,
|
|
trigdata->tg_trigtuple);
|
|
else if (TRIGGER_FIRED_BY_UPDATE(trigdata->tg_event))
|
|
trv = plperl_modify_tuple(hvTD, trigdata,
|
|
trigdata->tg_newtuple);
|
|
else
|
|
{
|
|
ereport(WARNING,
|
|
(errcode(ERRCODE_E_R_I_E_TRIGGER_PROTOCOL_VIOLATED),
|
|
errmsg("ignoring modified row in DELETE trigger")));
|
|
trv = NULL;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_E_R_I_E_TRIGGER_PROTOCOL_VIOLATED),
|
|
errmsg("result of PL/Perl trigger function must be undef, "
|
|
"\"SKIP\", or \"MODIFY\"")));
|
|
trv = NULL;
|
|
}
|
|
retval = PointerGetDatum(trv);
|
|
}
|
|
|
|
SvREFCNT_dec(svTD);
|
|
if (perlret)
|
|
SvREFCNT_dec(perlret);
|
|
|
|
return retval;
|
|
}
|
|
|
|
|
|
static bool
|
|
validate_plperl_function(plperl_proc_ptr *proc_ptr, HeapTuple procTup)
|
|
{
|
|
if (proc_ptr && proc_ptr->proc_ptr)
|
|
{
|
|
plperl_proc_desc *prodesc = proc_ptr->proc_ptr;
|
|
bool uptodate;
|
|
|
|
/************************************************************
|
|
* If it's present, must check whether it's still up to date.
|
|
* This is needed because CREATE OR REPLACE FUNCTION can modify the
|
|
* function's pg_proc entry without changing its OID.
|
|
************************************************************/
|
|
uptodate = (prodesc->fn_xmin == HeapTupleHeaderGetXmin(procTup->t_data) &&
|
|
ItemPointerEquals(&prodesc->fn_tid, &procTup->t_self));
|
|
|
|
if (uptodate)
|
|
return true;
|
|
|
|
/* Otherwise, unlink the obsoleted entry from the hashtable ... */
|
|
proc_ptr->proc_ptr = NULL;
|
|
/* ... and release the corresponding refcount, probably deleting it */
|
|
decrement_prodesc_refcount(prodesc);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
|
|
static void
|
|
free_plperl_function(plperl_proc_desc *prodesc)
|
|
{
|
|
Assert(prodesc->refcount <= 0);
|
|
/* Release CODE reference, if we have one, from the appropriate interp */
|
|
if (prodesc->reference)
|
|
{
|
|
plperl_interp_desc *oldinterp = plperl_active_interp;
|
|
|
|
activate_interpreter(prodesc->interp);
|
|
SvREFCNT_dec(prodesc->reference);
|
|
activate_interpreter(oldinterp);
|
|
}
|
|
/* Get rid of what we conveniently can of our own structs */
|
|
/* (FmgrInfo subsidiary info will get leaked ...) */
|
|
if (prodesc->proname)
|
|
free(prodesc->proname);
|
|
free(prodesc);
|
|
}
|
|
|
|
|
|
static plperl_proc_desc *
|
|
compile_plperl_function(Oid fn_oid, bool is_trigger)
|
|
{
|
|
HeapTuple procTup;
|
|
Form_pg_proc procStruct;
|
|
plperl_proc_key proc_key;
|
|
plperl_proc_ptr *proc_ptr;
|
|
plperl_proc_desc *prodesc = NULL;
|
|
int i;
|
|
plperl_interp_desc *oldinterp = plperl_active_interp;
|
|
|
|
/* We'll need the pg_proc tuple in any case... */
|
|
procTup = SearchSysCache(PROCOID,
|
|
ObjectIdGetDatum(fn_oid),
|
|
0, 0, 0);
|
|
if (!HeapTupleIsValid(procTup))
|
|
elog(ERROR, "cache lookup failed for function %u", fn_oid);
|
|
procStruct = (Form_pg_proc) GETSTRUCT(procTup);
|
|
|
|
/* Try to find function in plperl_proc_hash */
|
|
proc_key.proc_id = fn_oid;
|
|
proc_key.is_trigger = is_trigger;
|
|
proc_key.user_id = GetUserId();
|
|
|
|
proc_ptr = hash_search(plperl_proc_hash, &proc_key,
|
|
HASH_FIND, NULL);
|
|
|
|
if (validate_plperl_function(proc_ptr, procTup))
|
|
prodesc = proc_ptr->proc_ptr;
|
|
else
|
|
{
|
|
/* If not found or obsolete, maybe it's plperlu */
|
|
proc_key.user_id = InvalidOid;
|
|
proc_ptr = hash_search(plperl_proc_hash, &proc_key,
|
|
HASH_FIND, NULL);
|
|
if (validate_plperl_function(proc_ptr, procTup))
|
|
prodesc = proc_ptr->proc_ptr;
|
|
}
|
|
|
|
/************************************************************
|
|
* If we haven't found it in the hashtable, we analyze
|
|
* the function's arguments and return type and store
|
|
* the in-/out-functions in the prodesc block and create
|
|
* a new hashtable entry for it.
|
|
*
|
|
* Then we load the procedure into the Perl interpreter.
|
|
************************************************************/
|
|
if (prodesc == NULL)
|
|
{
|
|
HeapTuple langTup;
|
|
HeapTuple typeTup;
|
|
Form_pg_language langStruct;
|
|
Form_pg_type typeStruct;
|
|
Datum prosrcdatum;
|
|
bool isnull;
|
|
char *proc_source;
|
|
|
|
/************************************************************
|
|
* Allocate a new procedure description block
|
|
************************************************************/
|
|
prodesc = (plperl_proc_desc *) malloc(sizeof(plperl_proc_desc));
|
|
if (prodesc == NULL)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_OUT_OF_MEMORY),
|
|
errmsg("out of memory")));
|
|
/* Initialize all fields to 0 so free_plperl_function is safe */
|
|
MemSet(prodesc, 0, sizeof(plperl_proc_desc));
|
|
|
|
prodesc->proname = strdup(NameStr(procStruct->proname));
|
|
if (prodesc->proname == NULL)
|
|
{
|
|
free_plperl_function(prodesc);
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_OUT_OF_MEMORY),
|
|
errmsg("out of memory")));
|
|
}
|
|
prodesc->fn_xmin = HeapTupleHeaderGetXmin(procTup->t_data);
|
|
prodesc->fn_tid = procTup->t_self;
|
|
|
|
/* Remember if function is STABLE/IMMUTABLE */
|
|
prodesc->fn_readonly =
|
|
(procStruct->provolatile != PROVOLATILE_VOLATILE);
|
|
|
|
/************************************************************
|
|
* Lookup the pg_language tuple by Oid
|
|
************************************************************/
|
|
langTup = SearchSysCache(LANGOID,
|
|
ObjectIdGetDatum(procStruct->prolang),
|
|
0, 0, 0);
|
|
if (!HeapTupleIsValid(langTup))
|
|
{
|
|
free_plperl_function(prodesc);
|
|
elog(ERROR, "cache lookup failed for language %u",
|
|
procStruct->prolang);
|
|
}
|
|
langStruct = (Form_pg_language) GETSTRUCT(langTup);
|
|
prodesc->lanpltrusted = langStruct->lanpltrusted;
|
|
ReleaseSysCache(langTup);
|
|
|
|
/************************************************************
|
|
* Get the required information for input conversion of the
|
|
* return value.
|
|
************************************************************/
|
|
if (!is_trigger)
|
|
{
|
|
typeTup = SearchSysCache(TYPEOID,
|
|
ObjectIdGetDatum(procStruct->prorettype),
|
|
0, 0, 0);
|
|
if (!HeapTupleIsValid(typeTup))
|
|
{
|
|
free_plperl_function(prodesc);
|
|
elog(ERROR, "cache lookup failed for type %u",
|
|
procStruct->prorettype);
|
|
}
|
|
typeStruct = (Form_pg_type) GETSTRUCT(typeTup);
|
|
|
|
/* Disallow pseudotype result, except VOID or RECORD */
|
|
if (typeStruct->typtype == TYPTYPE_PSEUDO)
|
|
{
|
|
if (procStruct->prorettype == VOIDOID ||
|
|
procStruct->prorettype == RECORDOID)
|
|
/* okay */ ;
|
|
else if (procStruct->prorettype == TRIGGEROID)
|
|
{
|
|
free_plperl_function(prodesc);
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("trigger functions can only be called "
|
|
"as triggers")));
|
|
}
|
|
else
|
|
{
|
|
free_plperl_function(prodesc);
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("PL/Perl functions cannot return type %s",
|
|
format_type_be(procStruct->prorettype))));
|
|
}
|
|
}
|
|
|
|
prodesc->result_oid = procStruct->prorettype;
|
|
prodesc->fn_retisset = procStruct->proretset;
|
|
prodesc->fn_retistuple = (procStruct->prorettype == RECORDOID ||
|
|
typeStruct->typtype == TYPTYPE_COMPOSITE);
|
|
|
|
prodesc->fn_retisarray =
|
|
(typeStruct->typlen == -1 && typeStruct->typelem);
|
|
|
|
perm_fmgr_info(typeStruct->typinput, &(prodesc->result_in_func));
|
|
prodesc->result_typioparam = getTypeIOParam(typeTup);
|
|
|
|
ReleaseSysCache(typeTup);
|
|
}
|
|
|
|
/************************************************************
|
|
* Get the required information for output conversion
|
|
* of all procedure arguments
|
|
************************************************************/
|
|
if (!is_trigger)
|
|
{
|
|
prodesc->nargs = procStruct->pronargs;
|
|
for (i = 0; i < prodesc->nargs; i++)
|
|
{
|
|
typeTup = SearchSysCache(TYPEOID,
|
|
ObjectIdGetDatum(procStruct->proargtypes.values[i]),
|
|
0, 0, 0);
|
|
if (!HeapTupleIsValid(typeTup))
|
|
{
|
|
free_plperl_function(prodesc);
|
|
elog(ERROR, "cache lookup failed for type %u",
|
|
procStruct->proargtypes.values[i]);
|
|
}
|
|
typeStruct = (Form_pg_type) GETSTRUCT(typeTup);
|
|
|
|
/* Disallow pseudotype argument */
|
|
if (typeStruct->typtype == TYPTYPE_PSEUDO)
|
|
{
|
|
free_plperl_function(prodesc);
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("PL/Perl functions cannot accept type %s",
|
|
format_type_be(procStruct->proargtypes.values[i]))));
|
|
}
|
|
|
|
if (typeStruct->typtype == TYPTYPE_COMPOSITE)
|
|
prodesc->arg_is_rowtype[i] = true;
|
|
else
|
|
{
|
|
prodesc->arg_is_rowtype[i] = false;
|
|
perm_fmgr_info(typeStruct->typoutput,
|
|
&(prodesc->arg_out_func[i]));
|
|
}
|
|
|
|
ReleaseSysCache(typeTup);
|
|
}
|
|
}
|
|
|
|
/************************************************************
|
|
* create the text of the anonymous subroutine.
|
|
* we do not use a named subroutine so that we can call directly
|
|
* through the reference.
|
|
************************************************************/
|
|
prosrcdatum = SysCacheGetAttr(PROCOID, procTup,
|
|
Anum_pg_proc_prosrc, &isnull);
|
|
if (isnull)
|
|
elog(ERROR, "null prosrc");
|
|
proc_source = TextDatumGetCString(prosrcdatum);
|
|
|
|
/************************************************************
|
|
* Create the procedure in the appropriate interpreter
|
|
************************************************************/
|
|
|
|
select_perl_context(prodesc->lanpltrusted);
|
|
|
|
prodesc->interp = plperl_active_interp;
|
|
|
|
plperl_create_sub(prodesc, proc_source, fn_oid);
|
|
|
|
activate_interpreter(oldinterp);
|
|
|
|
pfree(proc_source);
|
|
if (!prodesc->reference) /* can this happen? */
|
|
{
|
|
free_plperl_function(prodesc);
|
|
elog(ERROR, "could not create PL/Perl internal procedure");
|
|
}
|
|
|
|
/************************************************************
|
|
* OK, link the procedure into the correct hashtable entry
|
|
************************************************************/
|
|
proc_key.user_id = prodesc->lanpltrusted ? GetUserId() : InvalidOid;
|
|
|
|
proc_ptr = hash_search(plperl_proc_hash, &proc_key,
|
|
HASH_ENTER, NULL);
|
|
proc_ptr->proc_ptr = prodesc;
|
|
increment_prodesc_refcount(prodesc);
|
|
}
|
|
|
|
ReleaseSysCache(procTup);
|
|
|
|
return prodesc;
|
|
}
|
|
|
|
|
|
/* Build a hash from all attributes of a given tuple. */
|
|
|
|
static SV *
|
|
plperl_hash_from_tuple(HeapTuple tuple, TupleDesc tupdesc)
|
|
{
|
|
HV *hv;
|
|
int i;
|
|
|
|
hv = newHV();
|
|
|
|
for (i = 0; i < tupdesc->natts; i++)
|
|
{
|
|
Datum attr;
|
|
bool isnull;
|
|
char *attname;
|
|
char *outputstr;
|
|
Oid typoutput;
|
|
bool typisvarlena;
|
|
|
|
if (tupdesc->attrs[i]->attisdropped)
|
|
continue;
|
|
|
|
attname = NameStr(tupdesc->attrs[i]->attname);
|
|
attr = heap_getattr(tuple, i + 1, tupdesc, &isnull);
|
|
|
|
if (isnull)
|
|
{
|
|
/* Store (attname => undef) and move on. */
|
|
hv_store_string(hv, attname, newSV(0));
|
|
continue;
|
|
}
|
|
|
|
/* XXX should have a way to cache these lookups */
|
|
getTypeOutputInfo(tupdesc->attrs[i]->atttypid,
|
|
&typoutput, &typisvarlena);
|
|
|
|
outputstr = OidOutputFunctionCall(typoutput, attr);
|
|
|
|
hv_store_string(hv, attname, newSVstring(outputstr));
|
|
|
|
pfree(outputstr);
|
|
}
|
|
|
|
return newRV_noinc((SV *) hv);
|
|
}
|
|
|
|
|
|
HV *
|
|
plperl_spi_exec(char *query, int limit)
|
|
{
|
|
HV *ret_hv;
|
|
|
|
/*
|
|
* Execute the query inside a sub-transaction, so we can cope with errors
|
|
* sanely
|
|
*/
|
|
MemoryContext oldcontext = CurrentMemoryContext;
|
|
ResourceOwner oldowner = CurrentResourceOwner;
|
|
|
|
BeginInternalSubTransaction(NULL);
|
|
/* Want to run inside function's memory context */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
|
|
PG_TRY();
|
|
{
|
|
int spi_rv;
|
|
|
|
spi_rv = SPI_execute(query, current_call_data->prodesc->fn_readonly,
|
|
limit);
|
|
ret_hv = plperl_spi_execute_fetch_result(SPI_tuptable, SPI_processed,
|
|
spi_rv);
|
|
|
|
/* Commit the inner transaction, return to outer xact context */
|
|
ReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
|
|
/*
|
|
* AtEOSubXact_SPI() should not have popped any SPI context, but just
|
|
* in case it did, make sure we remain connected.
|
|
*/
|
|
SPI_restore_connection();
|
|
}
|
|
PG_CATCH();
|
|
{
|
|
ErrorData *edata;
|
|
|
|
/* Save error info */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
edata = CopyErrorData();
|
|
FlushErrorState();
|
|
|
|
/* Abort the inner transaction */
|
|
RollbackAndReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
|
|
/*
|
|
* If AtEOSubXact_SPI() popped any SPI context of the subxact, it will
|
|
* have left us in a disconnected state. We need this hack to return
|
|
* to connected state.
|
|
*/
|
|
SPI_restore_connection();
|
|
|
|
/* Punt the error to Perl */
|
|
croak("%s", edata->message);
|
|
|
|
/* Can't get here, but keep compiler quiet */
|
|
return NULL;
|
|
}
|
|
PG_END_TRY();
|
|
|
|
return ret_hv;
|
|
}
|
|
|
|
|
|
static HV *
|
|
plperl_spi_execute_fetch_result(SPITupleTable *tuptable, int processed,
|
|
int status)
|
|
{
|
|
HV *result;
|
|
|
|
result = newHV();
|
|
|
|
hv_store_string(result, "status",
|
|
newSVstring(SPI_result_code_string(status)));
|
|
hv_store_string(result, "processed",
|
|
newSViv(processed));
|
|
|
|
if (status > 0 && tuptable)
|
|
{
|
|
AV *rows;
|
|
SV *row;
|
|
int i;
|
|
|
|
rows = newAV();
|
|
for (i = 0; i < processed; i++)
|
|
{
|
|
row = plperl_hash_from_tuple(tuptable->vals[i], tuptable->tupdesc);
|
|
av_push(rows, row);
|
|
}
|
|
hv_store_string(result, "rows",
|
|
newRV_noinc((SV *) rows));
|
|
}
|
|
|
|
SPI_freetuptable(tuptable);
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
/*
|
|
* Note: plperl_return_next is called both in Postgres and Perl contexts.
|
|
* We report any errors in Postgres fashion (via ereport). If called in
|
|
* Perl context, it is SPI.xs's responsibility to catch the error and
|
|
* convert to a Perl error. We assume (perhaps without adequate justification)
|
|
* that we need not abort the current transaction if the Perl code traps the
|
|
* error.
|
|
*/
|
|
void
|
|
plperl_return_next(SV *sv)
|
|
{
|
|
plperl_proc_desc *prodesc;
|
|
FunctionCallInfo fcinfo;
|
|
ReturnSetInfo *rsi;
|
|
MemoryContext old_cxt;
|
|
|
|
if (!sv)
|
|
return;
|
|
|
|
prodesc = current_call_data->prodesc;
|
|
fcinfo = current_call_data->fcinfo;
|
|
rsi = (ReturnSetInfo *) fcinfo->resultinfo;
|
|
|
|
if (!prodesc->fn_retisset)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_SYNTAX_ERROR),
|
|
errmsg("cannot use return_next in a non-SETOF function")));
|
|
|
|
if (prodesc->fn_retistuple &&
|
|
!(SvOK(sv) && SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVHV))
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_DATATYPE_MISMATCH),
|
|
errmsg("SETOF-composite-returning PL/Perl function "
|
|
"must call return_next with reference to hash")));
|
|
|
|
if (!current_call_data->ret_tdesc)
|
|
{
|
|
TupleDesc tupdesc;
|
|
|
|
Assert(!current_call_data->tuple_store);
|
|
Assert(!current_call_data->attinmeta);
|
|
|
|
/*
|
|
* This is the first call to return_next in the current PL/Perl
|
|
* function call, so memoize some lookups
|
|
*/
|
|
if (prodesc->fn_retistuple)
|
|
(void) get_call_result_type(fcinfo, NULL, &tupdesc);
|
|
else
|
|
tupdesc = rsi->expectedDesc;
|
|
|
|
/*
|
|
* Make sure the tuple_store and ret_tdesc are sufficiently
|
|
* long-lived.
|
|
*/
|
|
old_cxt = MemoryContextSwitchTo(rsi->econtext->ecxt_per_query_memory);
|
|
|
|
current_call_data->ret_tdesc = CreateTupleDescCopy(tupdesc);
|
|
current_call_data->tuple_store =
|
|
tuplestore_begin_heap(rsi->allowedModes & SFRM_Materialize_Random,
|
|
false, work_mem);
|
|
if (prodesc->fn_retistuple)
|
|
{
|
|
current_call_data->attinmeta =
|
|
TupleDescGetAttInMetadata(current_call_data->ret_tdesc);
|
|
}
|
|
|
|
MemoryContextSwitchTo(old_cxt);
|
|
}
|
|
|
|
/*
|
|
* Producing the tuple we want to return requires making plenty of
|
|
* palloc() allocations that are not cleaned up. Since this function can
|
|
* be called many times before the current memory context is reset, we
|
|
* need to do those allocations in a temporary context.
|
|
*/
|
|
if (!current_call_data->tmp_cxt)
|
|
{
|
|
current_call_data->tmp_cxt =
|
|
AllocSetContextCreate(rsi->econtext->ecxt_per_tuple_memory,
|
|
"PL/Perl return_next temporary cxt",
|
|
ALLOCSET_DEFAULT_MINSIZE,
|
|
ALLOCSET_DEFAULT_INITSIZE,
|
|
ALLOCSET_DEFAULT_MAXSIZE);
|
|
}
|
|
|
|
old_cxt = MemoryContextSwitchTo(current_call_data->tmp_cxt);
|
|
|
|
if (prodesc->fn_retistuple)
|
|
{
|
|
HeapTuple tuple;
|
|
|
|
tuple = plperl_build_tuple_result((HV *) SvRV(sv),
|
|
current_call_data->attinmeta);
|
|
tuplestore_puttuple(current_call_data->tuple_store, tuple);
|
|
}
|
|
else
|
|
{
|
|
Datum ret;
|
|
bool isNull;
|
|
|
|
if (SvOK(sv))
|
|
{
|
|
char *val;
|
|
|
|
if (prodesc->fn_retisarray && SvROK(sv) &&
|
|
SvTYPE(SvRV(sv)) == SVt_PVAV)
|
|
{
|
|
sv = plperl_convert_to_pg_array(sv);
|
|
}
|
|
|
|
val = SvPV(sv, PL_na);
|
|
|
|
ret = InputFunctionCall(&prodesc->result_in_func, val,
|
|
prodesc->result_typioparam, -1);
|
|
isNull = false;
|
|
}
|
|
else
|
|
{
|
|
ret = InputFunctionCall(&prodesc->result_in_func, NULL,
|
|
prodesc->result_typioparam, -1);
|
|
isNull = true;
|
|
}
|
|
|
|
tuplestore_putvalues(current_call_data->tuple_store,
|
|
current_call_data->ret_tdesc,
|
|
&ret, &isNull);
|
|
}
|
|
|
|
MemoryContextSwitchTo(old_cxt);
|
|
MemoryContextReset(current_call_data->tmp_cxt);
|
|
}
|
|
|
|
|
|
SV *
|
|
plperl_spi_query(char *query)
|
|
{
|
|
SV *cursor;
|
|
|
|
/*
|
|
* Execute the query inside a sub-transaction, so we can cope with errors
|
|
* sanely
|
|
*/
|
|
MemoryContext oldcontext = CurrentMemoryContext;
|
|
ResourceOwner oldowner = CurrentResourceOwner;
|
|
|
|
BeginInternalSubTransaction(NULL);
|
|
/* Want to run inside function's memory context */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
|
|
PG_TRY();
|
|
{
|
|
void *plan;
|
|
Portal portal;
|
|
|
|
/* Create a cursor for the query */
|
|
plan = SPI_prepare(query, 0, NULL);
|
|
if (plan == NULL)
|
|
elog(ERROR, "SPI_prepare() failed:%s",
|
|
SPI_result_code_string(SPI_result));
|
|
|
|
portal = SPI_cursor_open(NULL, plan, NULL, NULL, false);
|
|
SPI_freeplan(plan);
|
|
if (portal == NULL)
|
|
elog(ERROR, "SPI_cursor_open() failed:%s",
|
|
SPI_result_code_string(SPI_result));
|
|
cursor = newSVstring(portal->name);
|
|
|
|
/* Commit the inner transaction, return to outer xact context */
|
|
ReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
|
|
/*
|
|
* AtEOSubXact_SPI() should not have popped any SPI context, but just
|
|
* in case it did, make sure we remain connected.
|
|
*/
|
|
SPI_restore_connection();
|
|
}
|
|
PG_CATCH();
|
|
{
|
|
ErrorData *edata;
|
|
|
|
/* Save error info */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
edata = CopyErrorData();
|
|
FlushErrorState();
|
|
|
|
/* Abort the inner transaction */
|
|
RollbackAndReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
|
|
/*
|
|
* If AtEOSubXact_SPI() popped any SPI context of the subxact, it will
|
|
* have left us in a disconnected state. We need this hack to return
|
|
* to connected state.
|
|
*/
|
|
SPI_restore_connection();
|
|
|
|
/* Punt the error to Perl */
|
|
croak("%s", edata->message);
|
|
|
|
/* Can't get here, but keep compiler quiet */
|
|
return NULL;
|
|
}
|
|
PG_END_TRY();
|
|
|
|
return cursor;
|
|
}
|
|
|
|
|
|
SV *
|
|
plperl_spi_fetchrow(char *cursor)
|
|
{
|
|
SV *row;
|
|
|
|
/*
|
|
* Execute the FETCH inside a sub-transaction, so we can cope with errors
|
|
* sanely
|
|
*/
|
|
MemoryContext oldcontext = CurrentMemoryContext;
|
|
ResourceOwner oldowner = CurrentResourceOwner;
|
|
|
|
BeginInternalSubTransaction(NULL);
|
|
/* Want to run inside function's memory context */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
|
|
PG_TRY();
|
|
{
|
|
Portal p = SPI_cursor_find(cursor);
|
|
|
|
if (!p)
|
|
{
|
|
row = &PL_sv_undef;
|
|
}
|
|
else
|
|
{
|
|
SPI_cursor_fetch(p, true, 1);
|
|
if (SPI_processed == 0)
|
|
{
|
|
SPI_cursor_close(p);
|
|
row = &PL_sv_undef;
|
|
}
|
|
else
|
|
{
|
|
row = plperl_hash_from_tuple(SPI_tuptable->vals[0],
|
|
SPI_tuptable->tupdesc);
|
|
}
|
|
SPI_freetuptable(SPI_tuptable);
|
|
}
|
|
|
|
/* Commit the inner transaction, return to outer xact context */
|
|
ReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
|
|
/*
|
|
* AtEOSubXact_SPI() should not have popped any SPI context, but just
|
|
* in case it did, make sure we remain connected.
|
|
*/
|
|
SPI_restore_connection();
|
|
}
|
|
PG_CATCH();
|
|
{
|
|
ErrorData *edata;
|
|
|
|
/* Save error info */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
edata = CopyErrorData();
|
|
FlushErrorState();
|
|
|
|
/* Abort the inner transaction */
|
|
RollbackAndReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
|
|
/*
|
|
* If AtEOSubXact_SPI() popped any SPI context of the subxact, it will
|
|
* have left us in a disconnected state. We need this hack to return
|
|
* to connected state.
|
|
*/
|
|
SPI_restore_connection();
|
|
|
|
/* Punt the error to Perl */
|
|
croak("%s", edata->message);
|
|
|
|
/* Can't get here, but keep compiler quiet */
|
|
return NULL;
|
|
}
|
|
PG_END_TRY();
|
|
|
|
return row;
|
|
}
|
|
|
|
void
|
|
plperl_spi_cursor_close(char *cursor)
|
|
{
|
|
Portal p = SPI_cursor_find(cursor);
|
|
|
|
if (p)
|
|
SPI_cursor_close(p);
|
|
}
|
|
|
|
SV *
|
|
plperl_spi_prepare(char *query, int argc, SV **argv)
|
|
{
|
|
void *volatile plan = NULL;
|
|
volatile MemoryContext plan_cxt = NULL;
|
|
plperl_query_desc *volatile qdesc = NULL;
|
|
plperl_query_entry *volatile hash_entry = NULL;
|
|
MemoryContext oldcontext = CurrentMemoryContext;
|
|
ResourceOwner oldowner = CurrentResourceOwner;
|
|
MemoryContext work_cxt;
|
|
bool found;
|
|
int i;
|
|
|
|
BeginInternalSubTransaction(NULL);
|
|
MemoryContextSwitchTo(oldcontext);
|
|
|
|
PG_TRY();
|
|
{
|
|
CHECK_FOR_INTERRUPTS();
|
|
|
|
/************************************************************
|
|
* Allocate the new querydesc structure
|
|
*
|
|
* The qdesc struct, as well as all its subsidiary data, lives in its
|
|
* plan_cxt. But note that the SPIPlan does not.
|
|
************************************************************/
|
|
plan_cxt = AllocSetContextCreate(TopMemoryContext,
|
|
"PL/Perl spi_prepare query",
|
|
ALLOCSET_SMALL_MINSIZE,
|
|
ALLOCSET_SMALL_INITSIZE,
|
|
ALLOCSET_SMALL_MAXSIZE);
|
|
MemoryContextSwitchTo(plan_cxt);
|
|
qdesc = (plperl_query_desc *) palloc0(sizeof(plperl_query_desc));
|
|
snprintf(qdesc->qname, sizeof(qdesc->qname), "%lx", (long) qdesc);
|
|
qdesc->plan_cxt = plan_cxt;
|
|
qdesc->nargs = argc;
|
|
qdesc->argtypes = (Oid *) palloc(argc * sizeof(Oid));
|
|
qdesc->arginfuncs = (FmgrInfo *) palloc(argc * sizeof(FmgrInfo));
|
|
qdesc->argtypioparams = (Oid *) palloc(argc * sizeof(Oid));
|
|
MemoryContextSwitchTo(oldcontext);
|
|
|
|
/************************************************************
|
|
* Do the following work in a short-lived context so that we don't
|
|
* leak a lot of memory in the PL/Perl function's SPI Proc context.
|
|
************************************************************/
|
|
work_cxt = AllocSetContextCreate(CurrentMemoryContext,
|
|
"PL/Perl spi_prepare workspace",
|
|
ALLOCSET_DEFAULT_MINSIZE,
|
|
ALLOCSET_DEFAULT_INITSIZE,
|
|
ALLOCSET_DEFAULT_MAXSIZE);
|
|
MemoryContextSwitchTo(work_cxt);
|
|
|
|
/************************************************************
|
|
* Resolve argument type names and then look them up by oid
|
|
* in the system cache, and remember the required information
|
|
* for input conversion.
|
|
************************************************************/
|
|
for (i = 0; i < argc; i++)
|
|
{
|
|
Oid typId,
|
|
typInput,
|
|
typIOParam;
|
|
int32 typmod;
|
|
|
|
parseTypeString(SvPV(argv[i], PL_na), &typId, &typmod);
|
|
|
|
getTypeInputInfo(typId, &typInput, &typIOParam);
|
|
|
|
qdesc->argtypes[i] = typId;
|
|
fmgr_info_cxt(typInput, &(qdesc->arginfuncs[i]), plan_cxt);
|
|
qdesc->argtypioparams[i] = typIOParam;
|
|
}
|
|
|
|
/************************************************************
|
|
* Prepare the plan and check for errors
|
|
************************************************************/
|
|
plan = SPI_prepare(query, argc, qdesc->argtypes);
|
|
|
|
if (plan == NULL)
|
|
elog(ERROR, "SPI_prepare() failed:%s",
|
|
SPI_result_code_string(SPI_result));
|
|
|
|
/************************************************************
|
|
* Save the plan into permanent memory (right now it's in the
|
|
* SPI procCxt, which will go away at function end).
|
|
************************************************************/
|
|
qdesc->plan = SPI_saveplan(plan);
|
|
if (qdesc->plan == NULL)
|
|
elog(ERROR, "SPI_saveplan() failed: %s",
|
|
SPI_result_code_string(SPI_result));
|
|
|
|
/* Release the procCxt copy to avoid within-function memory leak */
|
|
SPI_freeplan(plan);
|
|
|
|
/************************************************************
|
|
* Insert a hashtable entry for the plan.
|
|
************************************************************/
|
|
hash_entry = hash_search(plperl_active_interp->query_hash,
|
|
qdesc->qname,
|
|
HASH_ENTER, &found);
|
|
hash_entry->query_data = qdesc;
|
|
|
|
/* Get rid of workspace */
|
|
MemoryContextDelete(work_cxt);
|
|
|
|
/* Commit the inner transaction, return to outer xact context */
|
|
ReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
|
|
/*
|
|
* AtEOSubXact_SPI() should not have popped any SPI context, but just
|
|
* in case it did, make sure we remain connected.
|
|
*/
|
|
SPI_restore_connection();
|
|
}
|
|
PG_CATCH();
|
|
{
|
|
ErrorData *edata;
|
|
|
|
/* Save error info */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
edata = CopyErrorData();
|
|
FlushErrorState();
|
|
|
|
/* Drop anything we managed to allocate */
|
|
if (hash_entry)
|
|
hash_search(plperl_active_interp->query_hash,
|
|
qdesc->qname,
|
|
HASH_REMOVE, NULL);
|
|
if (plan_cxt)
|
|
MemoryContextDelete(plan_cxt);
|
|
if (plan)
|
|
SPI_freeplan(plan);
|
|
|
|
/* Abort the inner transaction */
|
|
RollbackAndReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
|
|
/*
|
|
* If AtEOSubXact_SPI() popped any SPI context of the subxact, it will
|
|
* have left us in a disconnected state. We need this hack to return
|
|
* to connected state.
|
|
*/
|
|
SPI_restore_connection();
|
|
|
|
/* Punt the error to Perl */
|
|
croak("%s", edata->message);
|
|
|
|
/* Can't get here, but keep compiler quiet */
|
|
return NULL;
|
|
}
|
|
PG_END_TRY();
|
|
|
|
/************************************************************
|
|
* Return the query's hash key to the caller.
|
|
************************************************************/
|
|
return newSVstring(qdesc->qname);
|
|
}
|
|
|
|
HV *
|
|
plperl_spi_exec_prepared(char *query, HV *attr, int argc, SV **argv)
|
|
{
|
|
HV *ret_hv;
|
|
SV **sv;
|
|
int i,
|
|
limit,
|
|
spi_rv;
|
|
char *nulls;
|
|
Datum *argvalues;
|
|
plperl_query_desc *qdesc;
|
|
plperl_query_entry *hash_entry;
|
|
|
|
/*
|
|
* Execute the query inside a sub-transaction, so we can cope with errors
|
|
* sanely
|
|
*/
|
|
MemoryContext oldcontext = CurrentMemoryContext;
|
|
ResourceOwner oldowner = CurrentResourceOwner;
|
|
|
|
BeginInternalSubTransaction(NULL);
|
|
/* Want to run inside function's memory context */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
|
|
PG_TRY();
|
|
{
|
|
/************************************************************
|
|
* Fetch the saved plan descriptor, see if it's o.k.
|
|
************************************************************/
|
|
hash_entry = hash_search(plperl_active_interp->query_hash, query,
|
|
HASH_FIND, NULL);
|
|
if (hash_entry == NULL)
|
|
elog(ERROR, "spi_exec_prepared: Invalid prepared query passed");
|
|
|
|
qdesc = hash_entry->query_data;
|
|
if (qdesc == NULL)
|
|
elog(ERROR, "spi_exec_prepared: plperl query_hash value vanished");
|
|
|
|
if (qdesc->nargs != argc)
|
|
elog(ERROR, "spi_exec_prepared: expected %d argument(s), %d passed",
|
|
qdesc->nargs, argc);
|
|
|
|
/************************************************************
|
|
* Parse eventual attributes
|
|
************************************************************/
|
|
limit = 0;
|
|
if (attr != NULL)
|
|
{
|
|
sv = hv_fetch_string(attr, "limit");
|
|
if (*sv && SvIOK(*sv))
|
|
limit = SvIV(*sv);
|
|
}
|
|
/************************************************************
|
|
* Set up arguments
|
|
************************************************************/
|
|
if (argc > 0)
|
|
{
|
|
nulls = (char *) palloc(argc);
|
|
argvalues = (Datum *) palloc(argc * sizeof(Datum));
|
|
}
|
|
else
|
|
{
|
|
nulls = NULL;
|
|
argvalues = NULL;
|
|
}
|
|
|
|
for (i = 0; i < argc; i++)
|
|
{
|
|
if (SvOK(argv[i]))
|
|
{
|
|
argvalues[i] = InputFunctionCall(&qdesc->arginfuncs[i],
|
|
SvPV(argv[i], PL_na),
|
|
qdesc->argtypioparams[i],
|
|
-1);
|
|
nulls[i] = ' ';
|
|
}
|
|
else
|
|
{
|
|
argvalues[i] = InputFunctionCall(&qdesc->arginfuncs[i],
|
|
NULL,
|
|
qdesc->argtypioparams[i],
|
|
-1);
|
|
nulls[i] = 'n';
|
|
}
|
|
}
|
|
|
|
/************************************************************
|
|
* go
|
|
************************************************************/
|
|
spi_rv = SPI_execute_plan(qdesc->plan, argvalues, nulls,
|
|
current_call_data->prodesc->fn_readonly, limit);
|
|
ret_hv = plperl_spi_execute_fetch_result(SPI_tuptable, SPI_processed,
|
|
spi_rv);
|
|
if (argc > 0)
|
|
{
|
|
pfree(argvalues);
|
|
pfree(nulls);
|
|
}
|
|
|
|
/* Commit the inner transaction, return to outer xact context */
|
|
ReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
|
|
/*
|
|
* AtEOSubXact_SPI() should not have popped any SPI context, but just
|
|
* in case it did, make sure we remain connected.
|
|
*/
|
|
SPI_restore_connection();
|
|
}
|
|
PG_CATCH();
|
|
{
|
|
ErrorData *edata;
|
|
|
|
/* Save error info */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
edata = CopyErrorData();
|
|
FlushErrorState();
|
|
|
|
/* Abort the inner transaction */
|
|
RollbackAndReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
|
|
/*
|
|
* If AtEOSubXact_SPI() popped any SPI context of the subxact, it will
|
|
* have left us in a disconnected state. We need this hack to return
|
|
* to connected state.
|
|
*/
|
|
SPI_restore_connection();
|
|
|
|
/* Punt the error to Perl */
|
|
croak("%s", edata->message);
|
|
|
|
/* Can't get here, but keep compiler quiet */
|
|
return NULL;
|
|
}
|
|
PG_END_TRY();
|
|
|
|
return ret_hv;
|
|
}
|
|
|
|
SV *
|
|
plperl_spi_query_prepared(char *query, int argc, SV **argv)
|
|
{
|
|
int i;
|
|
char *nulls;
|
|
Datum *argvalues;
|
|
plperl_query_desc *qdesc;
|
|
plperl_query_entry *hash_entry;
|
|
SV *cursor;
|
|
Portal portal = NULL;
|
|
|
|
/*
|
|
* Execute the query inside a sub-transaction, so we can cope with errors
|
|
* sanely
|
|
*/
|
|
MemoryContext oldcontext = CurrentMemoryContext;
|
|
ResourceOwner oldowner = CurrentResourceOwner;
|
|
|
|
BeginInternalSubTransaction(NULL);
|
|
/* Want to run inside function's memory context */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
|
|
PG_TRY();
|
|
{
|
|
/************************************************************
|
|
* Fetch the saved plan descriptor, see if it's o.k.
|
|
************************************************************/
|
|
hash_entry = hash_search(plperl_active_interp->query_hash, query,
|
|
HASH_FIND, NULL);
|
|
if (hash_entry == NULL)
|
|
elog(ERROR, "spi_query_prepared: Invalid prepared query passed");
|
|
|
|
qdesc = hash_entry->query_data;
|
|
if (qdesc == NULL)
|
|
elog(ERROR, "spi_query_prepared: plperl query_hash value vanished");
|
|
|
|
if (qdesc->nargs != argc)
|
|
elog(ERROR, "spi_query_prepared: expected %d argument(s), %d passed",
|
|
qdesc->nargs, argc);
|
|
|
|
/************************************************************
|
|
* Set up arguments
|
|
************************************************************/
|
|
if (argc > 0)
|
|
{
|
|
nulls = (char *) palloc(argc);
|
|
argvalues = (Datum *) palloc(argc * sizeof(Datum));
|
|
}
|
|
else
|
|
{
|
|
nulls = NULL;
|
|
argvalues = NULL;
|
|
}
|
|
|
|
for (i = 0; i < argc; i++)
|
|
{
|
|
if (SvOK(argv[i]))
|
|
{
|
|
argvalues[i] = InputFunctionCall(&qdesc->arginfuncs[i],
|
|
SvPV(argv[i], PL_na),
|
|
qdesc->argtypioparams[i],
|
|
-1);
|
|
nulls[i] = ' ';
|
|
}
|
|
else
|
|
{
|
|
argvalues[i] = InputFunctionCall(&qdesc->arginfuncs[i],
|
|
NULL,
|
|
qdesc->argtypioparams[i],
|
|
-1);
|
|
nulls[i] = 'n';
|
|
}
|
|
}
|
|
|
|
/************************************************************
|
|
* go
|
|
************************************************************/
|
|
portal = SPI_cursor_open(NULL, qdesc->plan, argvalues, nulls,
|
|
current_call_data->prodesc->fn_readonly);
|
|
if (argc > 0)
|
|
{
|
|
pfree(argvalues);
|
|
pfree(nulls);
|
|
}
|
|
if (portal == NULL)
|
|
elog(ERROR, "SPI_cursor_open() failed:%s",
|
|
SPI_result_code_string(SPI_result));
|
|
|
|
cursor = newSVstring(portal->name);
|
|
|
|
/* Commit the inner transaction, return to outer xact context */
|
|
ReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
|
|
/*
|
|
* AtEOSubXact_SPI() should not have popped any SPI context, but just
|
|
* in case it did, make sure we remain connected.
|
|
*/
|
|
SPI_restore_connection();
|
|
}
|
|
PG_CATCH();
|
|
{
|
|
ErrorData *edata;
|
|
|
|
/* Save error info */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
edata = CopyErrorData();
|
|
FlushErrorState();
|
|
|
|
/* Abort the inner transaction */
|
|
RollbackAndReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
|
|
/*
|
|
* If AtEOSubXact_SPI() popped any SPI context of the subxact, it will
|
|
* have left us in a disconnected state. We need this hack to return
|
|
* to connected state.
|
|
*/
|
|
SPI_restore_connection();
|
|
|
|
/* Punt the error to Perl */
|
|
croak("%s", edata->message);
|
|
|
|
/* Can't get here, but keep compiler quiet */
|
|
return NULL;
|
|
}
|
|
PG_END_TRY();
|
|
|
|
return cursor;
|
|
}
|
|
|
|
void
|
|
plperl_spi_freeplan(char *query)
|
|
{
|
|
void *plan;
|
|
plperl_query_desc *qdesc;
|
|
plperl_query_entry *hash_entry;
|
|
|
|
hash_entry = hash_search(plperl_active_interp->query_hash, query,
|
|
HASH_FIND, NULL);
|
|
if (hash_entry == NULL)
|
|
elog(ERROR, "spi_freeplan: Invalid prepared query passed");
|
|
|
|
qdesc = hash_entry->query_data;
|
|
if (qdesc == NULL)
|
|
elog(ERROR, "spi_freeplan: plperl query_hash value vanished");
|
|
plan = qdesc->plan;
|
|
|
|
/*
|
|
* free all memory before SPI_freeplan, so if it dies, nothing will be
|
|
* left over
|
|
*/
|
|
hash_search(plperl_active_interp->query_hash, query,
|
|
HASH_REMOVE, NULL);
|
|
|
|
MemoryContextDelete(qdesc->plan_cxt);
|
|
|
|
SPI_freeplan(plan);
|
|
}
|
|
|
|
/*
|
|
* Create a new SV from a string assumed to be in the current database's
|
|
* encoding.
|
|
*/
|
|
static SV *
|
|
newSVstring(const char *str)
|
|
{
|
|
SV *sv;
|
|
|
|
sv = newSVpv(str, 0);
|
|
#if PERL_BCDVERSION >= 0x5006000L
|
|
if (GetDatabaseEncoding() == PG_UTF8)
|
|
SvUTF8_on(sv);
|
|
#endif
|
|
return sv;
|
|
}
|
|
|
|
/*
|
|
* Store an SV into a hash table under a key that is a string assumed to be
|
|
* in the current database's encoding.
|
|
*/
|
|
static SV **
|
|
hv_store_string(HV *hv, const char *key, SV *val)
|
|
{
|
|
int32 klen = strlen(key);
|
|
|
|
/*
|
|
* This seems nowhere documented, but under Perl 5.8.0 and up, hv_store()
|
|
* recognizes a negative klen parameter as meaning a UTF-8 encoded key. It
|
|
* does not appear that hashes track UTF-8-ness of keys at all in Perl
|
|
* 5.6.
|
|
*/
|
|
#if PERL_BCDVERSION >= 0x5008000L
|
|
if (GetDatabaseEncoding() == PG_UTF8)
|
|
klen = -klen;
|
|
#endif
|
|
return hv_store(hv, key, klen, val, 0);
|
|
}
|
|
|
|
/*
|
|
* Fetch an SV from a hash table under a key that is a string assumed to be
|
|
* in the current database's encoding.
|
|
*/
|
|
static SV **
|
|
hv_fetch_string(HV *hv, const char *key)
|
|
{
|
|
int32 klen = strlen(key);
|
|
|
|
/* See notes in hv_store_string */
|
|
#if PERL_BCDVERSION >= 0x5008000L
|
|
if (GetDatabaseEncoding() == PG_UTF8)
|
|
klen = -klen;
|
|
#endif
|
|
return hv_fetch(hv, key, klen, 0);
|
|
}
|
|
|
|
|
|
/*
|
|
* Perl's own setlocal() copied from POSIX.xs
|
|
* (needed because of the calls to new_*())
|
|
*/
|
|
#ifdef WIN32
|
|
static char *
|
|
setlocale_perl(int category, char *locale)
|
|
{
|
|
char *RETVAL = setlocale(category, locale);
|
|
|
|
if (RETVAL)
|
|
{
|
|
#ifdef USE_LOCALE_CTYPE
|
|
if (category == LC_CTYPE
|
|
#ifdef LC_ALL
|
|
|| category == LC_ALL
|
|
#endif
|
|
)
|
|
{
|
|
char *newctype;
|
|
|
|
#ifdef LC_ALL
|
|
if (category == LC_ALL)
|
|
newctype = setlocale(LC_CTYPE, NULL);
|
|
else
|
|
#endif
|
|
newctype = RETVAL;
|
|
new_ctype(newctype);
|
|
}
|
|
#endif /* USE_LOCALE_CTYPE */
|
|
#ifdef USE_LOCALE_COLLATE
|
|
if (category == LC_COLLATE
|
|
#ifdef LC_ALL
|
|
|| category == LC_ALL
|
|
#endif
|
|
)
|
|
{
|
|
char *newcoll;
|
|
|
|
#ifdef LC_ALL
|
|
if (category == LC_ALL)
|
|
newcoll = setlocale(LC_COLLATE, NULL);
|
|
else
|
|
#endif
|
|
newcoll = RETVAL;
|
|
new_collate(newcoll);
|
|
}
|
|
#endif /* USE_LOCALE_COLLATE */
|
|
|
|
|
|
#ifdef USE_LOCALE_NUMERIC
|
|
if (category == LC_NUMERIC
|
|
#ifdef LC_ALL
|
|
|| category == LC_ALL
|
|
#endif
|
|
)
|
|
{
|
|
char *newnum;
|
|
|
|
#ifdef LC_ALL
|
|
if (category == LC_ALL)
|
|
newnum = setlocale(LC_NUMERIC, NULL);
|
|
else
|
|
#endif
|
|
newnum = RETVAL;
|
|
new_numeric(newnum);
|
|
}
|
|
#endif /* USE_LOCALE_NUMERIC */
|
|
}
|
|
|
|
return RETVAL;
|
|
}
|
|
|
|
#endif
|