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authorOleksandr Byelkin <sanja@mariadb.com>2019-10-15 12:24:23 +0200
committerOleksandr Byelkin <sanja@mariadb.com>2019-10-15 13:20:22 +0200
commit4ba763db77a954e355cdb90a7ef30572e2a4317b (patch)
tree526f83cfc2b3dcd30605b1d61c4cdefd3df0ff88 /mysql-test/r/merge-big.result
parentc2854c7863aa01895febfb6503f542fce6825bd6 (diff)
downloadmariadb-git-4ba763db77a954e355cdb90a7ef30572e2a4317b.tar.gz
MDEV-13172: Wrong result / SELECT ... WHERE EXISTS ... (with UNIQUE Key)bb-5.5-MDEV-13172
IS NULL or <=> with unique field does not mean unique row, because several NULL possible, so we can not convert to normal join in this case.
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