postgresql

History

Tom Lane f630157496 Merge parser's p_relnamespace and p_varnamespace lists into a single list. Now that we are storing structs in these lists, the distinction between the two lists can be represented with a couple of extra flags while using only a single list. This simplifies the code and should save a little bit of palloc traffic, since the majority of RTEs are represented in both lists anyway.		2012-08-08 16:41:31 -04:00
..
.gitignore	Convert cvsignore to gitignore, and add .gitignore for build targets.	2010-09-22 12:57:04 +02:00
Makefile	Call check_keywords.pl in maintainer-check	2012-02-27 13:53:12 +02:00
README	Revise collation derivation method and expression-tree representation.	2011-03-19 20:30:08 -04:00
analyze.c	Merge parser's p_relnamespace and p_varnamespace lists into a single list.	2012-08-08 16:41:31 -04:00
gram.y	Implement SQL-standard LATERAL subqueries.	2012-08-07 19:02:54 -04:00
keywords.c	Update copyright notices for year 2012.	2012-01-01 18:01:58 -05:00
kwlookup.c	Update copyright notices for year 2012.	2012-01-01 18:01:58 -05:00
parse_agg.c	Implement SQL-standard LATERAL subqueries.	2012-08-07 19:02:54 -04:00
parse_clause.c	Merge parser's p_relnamespace and p_varnamespace lists into a single list.	2012-08-08 16:41:31 -04:00
parse_coerce.c	Run pgindent on 9.2 source tree in preparation for first 9.3	2012-06-10 15:20:04 -04:00
parse_collate.c	Lots of doc corrections.	2012-04-23 22:43:09 -04:00
parse_cte.c	Fix WITH attached to a nested set operation (UNION/INTERSECT/EXCEPT).	2012-07-31 17:56:21 -04:00
parse_expr.c	Implement SQL-standard LATERAL subqueries.	2012-08-07 19:02:54 -04:00
parse_func.c	Run pgindent on 9.2 source tree in preparation for first 9.3	2012-06-10 15:20:04 -04:00
parse_node.c	Update copyright notices for year 2012.	2012-01-01 18:01:58 -05:00
parse_oper.c	Update copyright notices for year 2012.	2012-01-01 18:01:58 -05:00
parse_param.c	Update copyright notices for year 2012.	2012-01-01 18:01:58 -05:00
parse_relation.c	Merge parser's p_relnamespace and p_varnamespace lists into a single list.	2012-08-08 16:41:31 -04:00
parse_target.c	Merge parser's p_relnamespace and p_varnamespace lists into a single list.	2012-08-08 16:41:31 -04:00
parse_type.c	Fix WITH attached to a nested set operation (UNION/INTERSECT/EXCEPT).	2012-07-31 17:56:21 -04:00
parse_utilcmd.c	Avoid pre-determining index names during CREATE TABLE LIKE parsing.	2012-07-16 13:25:18 -04:00
parser.c	Update copyright notices for year 2012.	2012-01-01 18:01:58 -05:00
scan.l	Update copyright notices for year 2012.	2012-01-01 18:01:58 -05:00
scansup.c	Update copyright notices for year 2012.	2012-01-01 18:01:58 -05:00

README

src/backend/parser/README

Parser
======

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

parser.c	things start here
scan.l		break query into tokens
scansup.c	handle escapes in input strings
kwlookup.c	turn keywords into specific tokens
keywords.c	table of standard keywords (passed to kwlookup.c)
gram.y		parse the tokens and produce a "raw" parse tree
analyze.c	top level of parse analysis for optimizable queries
parse_agg.c	handle aggregates, like SUM(col1),  AVG(col2), ...
parse_clause.c	handle clauses like WHERE, ORDER BY, GROUP BY, ...
parse_coerce.c	handle coercing expressions to different data types
parse_collate.c	assign collation information in completed expressions
parse_cte.c	handle Common Table Expressions (WITH clauses)
parse_expr.c	handle expressions like col, col + 3, x = 3 or x = 4
parse_func.c	handle functions, table.column and column identifiers
parse_node.c	create nodes for various structures
parse_oper.c	handle operators in expressions
parse_param.c	handle Params (for the cases used in the core backend)
parse_relation.c support routines for tables and column handling
parse_target.c	handle the result list of the query
parse_type.c	support routines for data type handling
parse_utilcmd.c	parse analysis for utility commands (done at execution time)