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The previous coding failed to work correctly when we have a multi-level partitioned hierarchy where tables at successive levels have different attribute numbers for the partition key attributes. To fix, have each PartitionDispatch object store a standalone TupleTableSlot initialized with the TupleDesc of the corresponding partitioned table, along with a TupleConversionMap to map tuples from the its parent's rowtype to own rowtype. After tuple routing chooses a leaf partition, we must use the leaf partition's tuple descriptor, not the root table's. To that end, a dedicated TupleTableSlot for tuple routing is now allocated in EState. Amit Langote
90 lines
3 KiB
C
90 lines
3 KiB
C
/*-------------------------------------------------------------------------
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*
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* partition.h
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* Header file for structures and utility functions related to
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* partitioning
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*
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* Copyright (c) 2007-2016, PostgreSQL Global Development Group
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*
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* src/include/catalog/partition.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef PARTITION_H
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#define PARTITION_H
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#include "fmgr.h"
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#include "executor/tuptable.h"
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#include "nodes/execnodes.h"
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#include "parser/parse_node.h"
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#include "utils/rel.h"
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/*
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* PartitionBoundInfo encapsulates a set of partition bounds. It is usually
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* associated with partitioned tables as part of its partition descriptor.
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*
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* The internal structure is opaque outside partition.c.
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*/
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typedef struct PartitionBoundInfoData *PartitionBoundInfo;
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/*
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* Information about partitions of a partitioned table.
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*/
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typedef struct PartitionDescData
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{
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int nparts; /* Number of partitions */
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Oid *oids; /* OIDs of partitions */
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PartitionBoundInfo boundinfo; /* collection of partition bounds */
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} PartitionDescData;
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typedef struct PartitionDescData *PartitionDesc;
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/*-----------------------
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* PartitionDispatch - information about one partitioned table in a partition
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* hiearchy required to route a tuple to one of its partitions
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*
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* reldesc Relation descriptor of the table
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* key Partition key information of the table
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* keystate Execution state required for expressions in the partition key
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* partdesc Partition descriptor of the table
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* tupslot A standalone TupleTableSlot initialized with this table's tuple
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* descriptor
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* tupmap TupleConversionMap to convert from the parent's rowtype to
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* this table's rowtype (when extracting the partition key of a
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* tuple just before routing it through this table)
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* indexes Array with partdesc->nparts members (for details on what
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* individual members represent, see how they are set in
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* RelationGetPartitionDispatchInfo())
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*-----------------------
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*/
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typedef struct PartitionDispatchData
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{
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Relation reldesc;
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PartitionKey key;
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List *keystate; /* list of ExprState */
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PartitionDesc partdesc;
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TupleTableSlot *tupslot;
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TupleConversionMap *tupmap;
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int *indexes;
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} PartitionDispatchData;
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typedef struct PartitionDispatchData *PartitionDispatch;
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extern void RelationBuildPartitionDesc(Relation relation);
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extern bool partition_bounds_equal(PartitionKey key,
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PartitionBoundInfo p1, PartitionBoundInfo p2);
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extern void check_new_partition_bound(char *relname, Relation parent, Node *bound);
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extern Oid get_partition_parent(Oid relid);
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extern List *get_qual_from_partbound(Relation rel, Relation parent, Node *bound);
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extern List *RelationGetPartitionQual(Relation rel, bool recurse);
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/* For tuple routing */
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extern PartitionDispatch *RelationGetPartitionDispatchInfo(Relation rel,
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int lockmode, int *num_parted,
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List **leaf_part_oids);
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extern int get_partition_for_tuple(PartitionDispatch *pd,
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TupleTableSlot *slot,
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EState *estate,
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Oid *failed_at);
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#endif /* PARTITION_H */
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