Fix multibyte issue in ltree_strncasecmp().
Previously, the API for ltree_strncasecmp() took two inputs but only
one length (that of the smaller input). It truncated the larger input
to that length, but that could break a multibyte sequence.
Change the API to be a check for prefix equality (possibly
case-insensitive) instead, which is all that's needed by the
callers. Also, provide the lengths of both inputs.
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Reviewed-by: Peter Eisentraut <peter@eisentraut.org>
Discussion: https://postgr.es/m/5f65b85740197ba6249ea507cddf609f84a6188b.camel%40j-davis.com
Backpatch-through: 14
Branch
------
master
Details
-------
https://git.postgresql.org/pg/commitdiff/84d5efa7e3ebcf04694d312b0f14ceb35dcdfb8e
Modified Files
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contrib/ltree/lquery_op.c | 40 ++++++++++++++++++++++++++++------------
contrib/ltree/ltree.h | 7 +++++--
contrib/ltree/ltxtquery_op.c | 8 ++++----
3 files changed, 37 insertions(+), 18 deletions(-)
