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postgresql/src/backend/parser
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Peter Eisentraut 550214a4ef Add operator_with_argtypes grammar rule 
This makes the handling of operators similar to that of functions and
aggregates.

Rename node FuncWithArgs to ObjectWithArgs, to reflect the expanded use.

Reviewed-by: Jim Nasby <Jim.Nasby@BlueTreble.com>
Reviewed-by: Michael Paquier <michael.paquier@gmail.com>
 		2017-03-06 13:31:47 -05:00
..
.gitignore Convert cvsignore to gitignore, and add .gitignore for build targets. 2010-09-22 12:57:04 +02:00
Makefile Suppress "unused variable" warnings with older versions of flex. 2017-02-19 13:04:30 -05:00
README Move keywords.c/kwlookup.c into src/common/. 2016-03-23 20:22:08 -04:00
analyze.c Make more use of castNode() 2017-02-21 11:59:09 -05:00
check_keywords.pl Update copyright via script for 2017 2017-01-03 13:48:53 -05:00
gram.y Add operator_with_argtypes grammar rule 2017-03-06 13:31:47 -05:00
parse_agg.c Remove vestigial resolveUnknown arguments from transformSortClause etc. 2017-01-25 09:35:00 -05:00
parse_clause.c Make tablesample work with partitioned tables. 2017-02-24 12:23:28 +05:30
parse_coerce.c Make messages mentioning type names more uniform 2017-01-18 16:08:20 -03:00
parse_collate.c Make more use of castNode() 2017-02-21 11:59:09 -05:00
parse_cte.c Change unknown-type literals to type text in SELECT and RETURNING lists. 2017-01-25 09:17:24 -05:00
parse_expr.c Make more use of castNode() 2017-02-21 11:59:09 -05:00
parse_func.c Make more use of castNode() 2017-02-21 11:59:09 -05:00
parse_node.c Make more use of castNode() 2017-02-21 11:59:09 -05:00
parse_oper.c Update copyright via script for 2017 2017-01-03 13:48:53 -05:00
parse_param.c Update copyright via script for 2017 2017-01-03 13:48:53 -05:00
parse_relation.c Make more use of castNode() 2017-02-21 11:59:09 -05:00
parse_target.c Change unknown-type literals to type text in SELECT and RETURNING lists. 2017-01-25 09:17:24 -05:00
parse_type.c Make more use of castNode() 2017-02-21 11:59:09 -05:00
parse_utilcmd.c Make more use of castNode() 2017-02-21 11:59:09 -05:00
parser.c Change representation of statement lists, and add statement location info. 2017-01-14 16:02:35 -05:00
scan.l Update copyright via script for 2017 2017-01-03 13:48:53 -05:00
scansup.c Update copyright via script for 2017 2017-01-03 13:48:53 -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.