Repair bug in regexp split performance improvements. Commit c8ea87e4b introduced a temporary conversion buffer for substrings extracted during regexp splits. Unfortunately the code that sized it was failing to ignore the effects of ignored degenerate regexp matches, so for regexp_split_* calls it could under-size the buffer in such cases.
Fix, and add some regression test cases (though those will only catch the bug if run in a multibyte encoding). Backpatch to 9.3 as the faulty code was. Thanks to the PostGIS project, Regina Obe and Paul Ramsey for the report (via IRC) and assistance in analysis. Patch by me. Branch ------ REL9_4_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/a389ddc759ae26169f3b124f2b72eea44eaf292a Modified Files -------------- src/backend/utils/adt/regexp.c | 16 ++++++++++------ src/test/regress/expected/strings.out | 18 ++++++++++++++++++ src/test/regress/sql/strings.sql | 3 +++ 3 files changed, 31 insertions(+), 6 deletions(-)
