postgresql/src/backend/parser
Stephen Frost b9a3ef55b2 Remove unnecessairly duplicated gram.y productions
Declarative partitioning duplicated the TypedTableElement productions,
evidently to remove the need to specify WITH OPTIONS when creating
partitions.  Instead, simply make WITH OPTIONS optional in the
TypedTableElement production and remove all of the duplicate
PartitionElement-related productions.  This change simplifies the
syntax and makes WITH OPTIONS optional when adding defaults, constraints
or storage parameters to columns when creating either typed tables or
partitions.

Also update pg_dump to no longer include WITH OPTIONS, since it's not
necessary, and update the documentation to reflect that WITH OPTIONS is
now optional.
2017-04-27 20:14:39 -04:00
..
.gitignore Convert cvsignore to gitignore, and add .gitignore for build targets. 2010-09-22 12:57:04 +02:00
analyze.c Improve castNode notation by introducing list-extraction-specific variants. 2017-04-10 13:51:53 -04:00
check_keywords.pl Clean up Perl code according to perlcritic 2017-03-27 08:18:22 -04:00
gram.y Remove unnecessairly duplicated gram.y productions 2017-04-27 20:14:39 -04:00
Makefile Add infrastructure to support EphemeralNamedRelation references. 2017-03-31 23:17:18 -05:00
parse_agg.c Remove vestigial resolveUnknown arguments from transformSortClause etc. 2017-01-25 09:35:00 -05:00
parse_clause.c Add infrastructure to support EphemeralNamedRelation references. 2017-03-31 23:17:18 -05:00
parse_coerce.c Support XMLTABLE query expression 2017-03-08 12:40:26 -03:00
parse_collate.c Improve castNode notation by introducing list-extraction-specific variants. 2017-04-10 13:51:53 -04:00
parse_cte.c Change unknown-type literals to type text in SELECT and RETURNING lists. 2017-01-25 09:17:24 -05:00
parse_enr.c Add infrastructure to support EphemeralNamedRelation references. 2017-03-31 23:17:18 -05:00
parse_expr.c Improve castNode notation by introducing list-extraction-specific variants. 2017-04-10 13:51:53 -04:00
parse_func.c Allow referring to functions without arguments when unique 2017-03-14 23:55:19 -04:00
parse_node.c Improve castNode notation by introducing list-extraction-specific variants. 2017-04-10 13:51:53 -04:00
parse_oper.c Replace LookupFuncNameTypeNames() with LookupFuncWithArgs() 2017-03-06 13:31:47 -05:00
parse_param.c Spelling fixes in code comments 2017-03-14 12:58:39 -04:00
parse_relation.c Sync addRangeTableEntryForENR() with its peer functions. 2017-04-16 14:02:47 -04:00
parse_target.c Add infrastructure to support EphemeralNamedRelation references. 2017-03-31 23:17:18 -05:00
parse_type.c Improve castNode notation by introducing list-extraction-specific variants. 2017-04-10 13:51:53 -04:00
parse_utilcmd.c Improve castNode notation by introducing list-extraction-specific variants. 2017-04-10 13:51:53 -04:00
parser.c Change representation of statement lists, and add statement location info. 2017-01-14 16:02:35 -05:00
README Move keywords.c/kwlookup.c into src/common/. 2016-03-23 20:22:08 -04:00
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

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.