postgresql/src/backend/parser
Tom Lane 658d391d87 Fix handling of GENERATED columns in CREATE TABLE LIKE INCLUDING DEFAULTS.
LIKE INCLUDING DEFAULTS tried to copy the attrdef expression without
copying the state of the attgenerated column.  This is in fact wrong,
because GENERATED and DEFAULT expressions are not the same kind of animal;
one can contain Vars and the other not.  We *must* copy attgenerated
when we're copying the attrdef expression.  Rearrange the if-tests
so that the expression is copied only when the correct one of
INCLUDING DEFAULTS and INCLUDING GENERATED has been specified.

Per private report from Manuel Rigger.

Tom Lane and Peter Eisentraut
2019-09-25 17:30:42 -04:00
..
.gitignore Convert cvsignore to gitignore, and add .gitignore for build targets. 2010-09-22 12:57:04 +02:00
analyze.c Fix many typos and inconsistencies 2019-07-01 10:00:23 +09:00
check_keywords.pl Update copyright for 2019 2019-01-02 12:44:25 -05:00
gram.y Fix many typos and inconsistencies 2019-07-01 10:00:23 +09:00
Makefile Revert MERGE patch 2018-04-12 11:22:56 +01:00
parse_agg.c Phase 2 pgindent run for v12. 2019-05-22 13:04:48 -04:00
parse_clause.c Phase 2 pgindent run for v12. 2019-05-22 13:04:48 -04:00
parse_coerce.c Phase 2 pgindent run for v12. 2019-05-22 13:04:48 -04:00
parse_collate.c Phase 2 pgindent run for v12. 2019-05-22 13:04:48 -04:00
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 Phase 2 pgindent run for v12. 2019-05-22 13:04:48 -04:00
parse_func.c Require the schema qualification in pg_temp.type_name(arg). 2019-08-05 07:48:45 -07:00
parse_node.c Reconcile nodes/*funcs.c with PostgreSQL 12 work. 2019-06-09 14:00:36 -07:00
parse_oper.c Phase 2 pgindent run for v12. 2019-05-22 13:04:48 -04:00
parse_param.c Phase 2 pgindent run for v12. 2019-05-22 13:04:48 -04:00
parse_relation.c Phase 2 pgindent run for v12. 2019-05-22 13:04:48 -04:00
parse_target.c Fix many typos and inconsistencies 2019-07-01 10:00:23 +09:00
parse_type.c Require the schema qualification in pg_temp.type_name(arg). 2019-08-05 07:48:45 -07:00
parse_utilcmd.c Fix handling of GENERATED columns in CREATE TABLE LIKE INCLUDING DEFAULTS. 2019-09-25 17:30:42 -04:00
parser.c Replace the data structure used for keyword lookup. 2019-01-06 17:02:57 -05:00
README Move keywords.c/kwlookup.c into src/common/. 2016-03-23 20:22:08 -04:00
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

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.