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Álvaro Herrera c2da1a5d63 Make query jumbling also squash PARAM_EXTERN params ... Commit 62d712ecfd made query jumbling squash lists of Consts as a single element, but there's no reason not to treat PARAM_EXTERN parameters the same. For these purposes, these values are indeed constants for any particular execution of a query. In particular, this should make list squashing more useful for applications using extended query protocol, which would use parameters extensively. A complication arises: if a query has both external parameters and squashable lists, then the parameter number used as placeholder for the squashed list might be inconsistent with regards to the parameter numbers used by the query literal. To reduce the surprise factor, all parameters are renumbered starting from 1 in that case. Author: Sami Imseih <samimseih@gmail.com> Author: Dmitry Dolgov <9erthalion6@gmail.com> Reviewed-by: Michael Paquier <michael@paquier.xyz> Discussion: https://postgr.es/m/CAA5RZ0tRXoPG2y6bMgBCWNDt0Tn=unRerbzYM=oW0syi1=C1OA@mail.gmail.com		3 months ago
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cleanup.out	Refactor tests of pg_stat_statements for planning, utility and level tracking	3 years ago
cursors.out	Add NOT NULL checking of pg_stat_statements_reset() in tests	2 years ago
dml.out	Remove the query_id_squash_values GUC	6 months ago
entry_timestamp.out	Track statement entry timestamp in contrib/pg_stat_statements	2 years ago
extended.out	Make query jumbling also squash PARAM_EXTERN params	3 months ago
level_tracking.out	Revert support for improved tracking of nested queries	3 months ago
oldextversions.out	pg_stat_statements: Add wal_buffers_full	7 months ago
parallel.out	pg_stat_statements: Add columns to track parallel worker activity	11 months ago
planning.out	Revert support for improved tracking of nested queries	3 months ago
privileges.out	pg_stat_statements: Add regression test for privilege handling.	1 year ago
select.out	Fix squashing algorithm for query texts	3 months ago
squashing.out	Make query jumbling also squash PARAM_EXTERN params	3 months ago
user_activity.out	Add NOT NULL checking of pg_stat_statements_reset() in tests	2 years ago
utility.out	Revert support for improved tracking of nested queries	3 months ago
wal.out	Show values of SET statements as constants in pg_stat_statements	12 months ago