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Andres Freund 111944c5ee Replace heapam.h includes with {table, relation}.h where applicable. 
A lot of files only included heapam.h for relation_open, heap_open etc
- replace the heapam.h include in those files with the narrower
header.

Author: Andres Freund
Discussion: https://postgr.es/m/20190111000539.xbv7s6w7ilcvm7dp@alap3.anarazel.de
 		2019-01-21 10:51:37 -08:00
..
.gitignore Convert cvsignore to gitignore, and add .gitignore for build targets. 2010-09-22 12:57:04 +02:00
Makefile Revert MERGE patch 2018-04-12 11:22:56 +01:00
README Move keywords.c/kwlookup.c into src/common/. 2016-03-23 20:22:08 -04:00
analyze.c Postpone aggregate checks until after collation is assigned. 2019-01-17 06:46:10 +00:00
check_keywords.pl Update copyright for 2019 2019-01-02 12:44:25 -05:00
gram.y Allow COPY FROM to filter data using WHERE conditions 2019-01-20 00:22:14 +01:00
parse_agg.c Allow COPY FROM to filter data using WHERE conditions 2019-01-20 00:22:14 +01:00
parse_clause.c Replace heapam.h includes with {table, relation}.h where applicable. 2019-01-21 10:51:37 -08:00
parse_coerce.c Update copyright for 2019 2019-01-02 12:44:25 -05:00
parse_collate.c Update copyright for 2019 2019-01-02 12:44:25 -05:00
parse_cte.c Update copyright for 2019 2019-01-02 12:44:25 -05:00
parse_enr.c Update copyright for 2019 2019-01-02 12:44:25 -05:00
parse_expr.c Allow COPY FROM to filter data using WHERE conditions 2019-01-20 00:22:14 +01:00
parse_func.c Allow COPY FROM to filter data using WHERE conditions 2019-01-20 00:22:14 +01:00
parse_node.c Replace heapam.h includes with {table, relation}.h where applicable. 2019-01-21 10:51:37 -08:00
parse_oper.c Update copyright for 2019 2019-01-02 12:44:25 -05:00
parse_param.c Update copyright for 2019 2019-01-02 12:44:25 -05:00
parse_relation.c Replace heapam.h includes with {table, relation}.h where applicable. 2019-01-21 10:51:37 -08:00
parse_target.c Update copyright for 2019 2019-01-02 12:44:25 -05:00
parse_type.c Update copyright for 2019 2019-01-02 12:44:25 -05:00
parse_utilcmd.c Replace heapam.h includes with {table, relation}.h where applicable. 2019-01-21 10:51:37 -08:00
parser.c Replace the data structure used for keyword lookup. 2019-01-06 17:02:57 -05:00
scan.l Replace the data structure used for keyword lookup. 2019-01-06 17:02:57 -05:00
scansup.c Update copyright for 2019 2019-01-02 12:44:25 -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
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)

See also src/common/keywords.c, which contains the table of standard
keywords and the keyword lookup function.  We separated that out because
various frontend code wants to use it too.