postgresql

History

Tom Lane 3908473c80 Make DROP TABLE rollback-able: postpone physical file delete until commit. (WAL logging for this is not done yet, however.) Clean up a number of really crufty things that are no longer needed now that DROP behaves nicely. Make temp table mapper do the right things when drop or rename affecting a temp table is rolled back. Also, remove "relation modified while in use" error check, in favor of locking tables at first reference and holding that lock throughout the statement.		2000-11-08 22:10:03 +00:00
..
.cvsignore	Add .cvsignore file so cvs doesn't complain if you have lex/yacc	1999-03-21 02:43:58 +00:00
Makefile	Add support for VPATH builds, that is, building somewhere else than in the	2000-10-20 21:04:27 +00:00
README	cleanup	1998-08-23 14:43:46 +00:00
analyze.c	Make DROP TABLE rollback-able: postpone physical file delete until commit.	2000-11-08 22:10:03 +00:00
gram.y	Make DROP TABLE rollback-able: postpone physical file delete until commit.	2000-11-08 22:10:03 +00:00
keywords.c	Add ANALYSE spelling of ANALYZE for vacuum.	2000-11-08 21:28:06 +00:00
parse_agg.c	Subselects in FROM clause, per ISO syntax: FROM (SELECT ...) [AS] alias.	2000-09-29 18:21:41 +00:00
parse_clause.c	Make DROP TABLE rollback-able: postpone physical file delete until commit.	2000-11-08 22:10:03 +00:00
parse_coerce.c	Reimplementation of UNION/INTERSECT/EXCEPT. INTERSECT/EXCEPT now meet the	2000-10-05 19:11:39 +00:00
parse_expr.c	Arrange that no database accesses are attempted during parser() --- this	2000-10-07 00:58:23 +00:00
parse_func.c	Allow type resolution for UNKNOWN arguments to functions to fall back to	2000-11-06 15:42:30 +00:00
parse_node.c	Change the parser to convert SQL "position" and "substring" syntax to	2000-10-31 10:22:13 +00:00
parse_oper.c	Enable fallback to string type when argument(s) are of UNKNOWN type.	2000-11-07 16:01:01 +00:00
parse_relation.c	Make DROP TABLE rollback-able: postpone physical file delete until commit.	2000-11-08 22:10:03 +00:00
parse_target.c	Subselects in FROM clause, per ISO syntax: FROM (SELECT ...) [AS] alias.	2000-09-29 18:21:41 +00:00
parse_type.c	Mark functions as static and ifdef NOT_USED as appropriate.	2000-06-08 22:38:00 +00:00
parser.c	Arrange that no database accesses are attempted during parser() --- this	2000-10-07 00:58:23 +00:00
scan.l	Peter forgot to fix {operator} rule to match modified definition of	2000-11-02 23:20:27 +00:00
scansup.c	Ye-old pgindent run. Same 4-space tabs.	2000-04-12 17:17:23 +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_coerce.c	used for coercing expressions of different types
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, table.column and column identifiers
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