postgresql/src/backend/parser
Tom Lane fedfcf6650 Don't try to parallelize array_agg() on an anonymous record type.
This doesn't work because record_recv requires the typmod that
identifies the specific record type (in our session) and
array_agg_deserialize has no convenient way to get that information.
The result is an "input of anonymous composite types is not
implemented" error.

We could probably make this work if we had to, but it does not seem
worth the trouble, given that it took this long to get a field report.
Just shut off parallelization, as though record_recv didn't exist.

Oversight in commit 16fd03e95.  Back-patch to v16 where that
came in.

Reported-by: Kirill Zdornyy <kirill@dineserve.com>
Diagnosed-by: Richard Guo <guofenglinux@gmail.com>
Author: Tom Lane <tgl@sss.pgh.pa.us>
Reviewed-by: David Rowley <dgrowleyml@gmail.com>
Discussion: https://postgr.es/m/atLI5Kce2ie1zcYjU0w_kjtVaxiYbYGTihrkLDmGZQnRDD4pnXukIATaABbnIj9pUnelC4ESvCXMm4HAyHg-v61XABaKpERj0A2IXzJZM7g=@dineserve.com
Backpatch-through: 16
2025-03-09 13:11:20 -04:00
..
.gitignore Convert cvsignore to gitignore, and add .gitignore for build targets. 2010-09-22 12:57:04 +02:00
analyze.c Add OLD/NEW support to RETURNING in DML queries. 2025-01-16 14:57:35 +00:00
check_keywords.pl Update copyright for 2025 2025-01-01 11:21:55 -05:00
gram.y Add ALTER TABLE ... ALTER CONSTRAINT ... SET [NO] INHERIT 2025-03-05 13:50:22 +01:00
gramparse.h Update copyright for 2025 2025-01-01 11:21:55 -05:00
Makefile Drop warning-free support for Flex 2.5.35 2025-01-15 15:35:08 +01:00
meson.build Drop warning-free support for Flex 2.5.35 2025-01-15 15:35:08 +01:00
parse_agg.c Don't try to parallelize array_agg() on an anonymous record type. 2025-03-09 13:11:20 -04:00
parse_clause.c Add OLD/NEW support to RETURNING in DML queries. 2025-01-16 14:57:35 +00:00
parse_coerce.c Require callers of coerce_to_domain() to supply base type/typmod. 2025-01-29 15:42:25 -05:00
parse_collate.c Update copyright for 2025 2025-01-01 11:21:55 -05:00
parse_cte.c Update copyright for 2025 2025-01-01 11:21:55 -05:00
parse_enr.c Update copyright for 2025 2025-01-01 11:21:55 -05:00
parse_expr.c Add OLD/NEW support to RETURNING in DML queries. 2025-01-16 14:57:35 +00:00
parse_func.c Update copyright for 2025 2025-01-01 11:21:55 -05:00
parse_jsontable.c Update copyright for 2025 2025-01-01 11:21:55 -05:00
parse_merge.c Add OLD/NEW support to RETURNING in DML queries. 2025-01-16 14:57:35 +00:00
parse_node.c Update copyright for 2025 2025-01-01 11:21:55 -05:00
parse_oper.c Update copyright for 2025 2025-01-01 11:21:55 -05:00
parse_param.c Update copyright for 2025 2025-01-01 11:21:55 -05:00
parse_relation.c Virtual generated columns 2025-02-07 09:46:59 +01:00
parse_target.c Add OLD/NEW support to RETURNING in DML queries. 2025-01-16 14:57:35 +00:00
parse_type.c Update copyright for 2025 2025-01-01 11:21:55 -05:00
parse_utilcmd.c Add support for LIKE in CREATE FOREIGN TABLE 2025-02-19 15:50:37 +09:00
parser.c Update copyright for 2025 2025-01-01 11:21:55 -05:00
README Remove outdated reference to a removed file 2023-06-15 22:35:42 +09:00
scan.l Drop warning-free support for Flex 2.5.35 2025-01-15 15:35:08 +01:00
scansup.c Update copyright for 2025 2025-01-01 11:21:55 -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_enr.c	handle ephemeral named rels (trigger transition tables, ...)
parse_func.c	handle functions, table.column and column identifiers
parse_merge.c	handle MERGE
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.