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mariadb/sql
DerZc 46ea84b186 MDEV-39194: Fix DISTINCT bit and hex aggregation
Problem: SUM(DISTINCT b'1100') returns 9 instead of 12. The hybrid
hex/bit literal handler uses the default DOUBLE temporary field, so
its byte length becomes a DOUBLE(M,0) display width and clips the
numeric value.

Fix: Override numeric DISTINCT field construction for hybrid hex and
bit literals to allocate an unsigned Field_longlong directly. Preserve
argument-based field selection for other types so DISTINCT retains the
input expression's precision and scale, including decimal AVG inputs.
Extend main.sum_distinct to cover bit and hex literals, zero, byte and
unsigned 64-bit boundaries, duplicates, AVG, COUNT and decimal scale.

Recreated-by: Georgi "Joro" Kodinov <joro@mariadb.org>
2026-10-13 19:39:19 +03:00
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