Обсуждение: pgsql: Fix ILIKE to honor collation when working in single-byte encodin

Fix ILIKE to honor collation when working in single-byte encodings.

The original collation patch only fixed the multi-byte code path.
This change also ensures that ILIKE's idea of the case-folding rules
is exactly the same as str_tolower's.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/00f11f419caa873b44d70071d4ade0b8c75e7f36

Modified Files
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src/backend/utils/adt/like.c       |   80 +++++++++++++++++++++++++++++-------
src/backend/utils/adt/like_match.c |   12 +++--
2 files changed, 72 insertions(+), 20 deletions(-)