Show sort ordering options in EXPLAIN output. Up to now, EXPLAIN has contented itself with printing the sort expressions in a Sort or Merge Append plan node. This patch improves that by annotating the sort keys with COLLATE, DESC, USING, and/or NULLS FIRST/LAST whenever nondefault sort ordering options are used. The output is now a reasonably close approximation of an ORDER BY clause equivalent to the plan's ordering.
Marius Timmer, Lukas Kreft, and Arne Scheffer; reviewed by Mike Blackwell. Some additional hacking by me. Branch ------ master Details ------- http://git.postgresql.org/pg/commitdiff/20af53d7191f84d0f5b86da4362e481b7e85d52a Modified Files -------------- src/backend/commands/explain.c | 90 +++++++++++++++++++++++++++++- src/test/regress/expected/aggregates.out | 6 +- src/test/regress/expected/collate.out | 19 +++++++ src/test/regress/expected/equivclass.out | 4 +- src/test/regress/sql/collate.sql | 9 +++ 5 files changed, 120 insertions(+), 8 deletions(-) -- Sent via pgsql-committers mailing list ([email protected]) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-committers
