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postgresql/src/backend/parser
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Bruce Momjian 53622d66d2 Gram.y cleanup.
1998-01-17 05:01:34 +00:00
..
analyze.c Remove Query->qry_aggs and qry_numaggs and replace with Query->hasAggs. 1998-01-15 19:00:16 +00:00
gram.y Gram.y cleanup. 1998-01-17 05:01:34 +00:00
keywords.c Change elog(WARN) to elog(ERROR) and elog(ABORT). 1998-01-05 03:35:55 +00:00
Makefile Major cleanout of PORTNAME variables from Makefiles...bound to screw up 1997-12-20 00:29:35 +00:00
parse_agg.c Remove Query->qry_aggs and qry_numaggs and replace with Query->hasAggs. 1998-01-15 19:00:16 +00:00
parse_clause.c Fix sorting of multiple fields broken with UNION. 1998-01-06 23:58:05 +00:00
parse_expr.c New pg_attribute.atttypmod for type-specific information like 1998-01-16 23:21:07 +00:00
parse_func.c Remove Query->qry_aggs and qry_numaggs and replace with Query->hasAggs. 1998-01-15 19:00:16 +00:00
parse_node.c Creates the SubLink structure, and the Query->hasSubLink field, 1998-01-17 04:53:46 +00:00
parse_oper.c New pg_attribute.atttypmod for type-specific information like 1998-01-16 23:21:07 +00:00
parse_relation.c New pg_attribute.atttypmod for type-specific information like 1998-01-16 23:21:07 +00:00
parse_target.c New pg_attribute.atttypmod for type-specific information like 1998-01-16 23:21:07 +00:00
parse_type.c New pg_attribute.atttypmod for type-specific information like 1998-01-16 23:21:07 +00:00
parser.c Fix for select 1=1 or 2=2, select 1=1 and 2=2, and select sum(2+2). 1997-12-22 05:42:25 +00:00
README Cleaups of comments. 1997-11-27 02:23:02 +00:00
scan.c Fix: 1998-01-15 20:54:52 +00:00
scan.l Change some ABORTS to ERROR. Add line number when COPY Failure. 1998-01-05 16:40:20 +00:00
scansup.c Cleanup up include files. 1997-11-26 01:14:33 +00:00

README 

This directory does more than tokenize and parse SQL queries.  It also
creates Query structures for the various complex queries that is passed
to the optimizer and then executor.

parser.c	things start here
scan.l		break query into tokens
scansup.c	handle escapes in input
keywords.c	turn keywords into specific tokens
gram.y		parse the tokens and fill query-type-specific structures
analyze.c	handle post-parse processing for each query type
parse_clause.c	handle clauses like WHERE, ORDER BY, GROUP BY, ...
parse_expr.c	handle expressions like col, col + 3, x = 3 or x = 4
parse_oper.c	handle operations in expressions
parse_agg.c	handle aggregates, like SUM(col1),  AVG(col2), ...
parse_func.c	handle functions like date_part(col3), trim(col4), ...

parse_node.c	create nodes for various structures
parse_target.c	handle the result list of the query
parse_relation.c support routines for tables and column handling
parse_type.c	support routines for type handling