Optimized max_part_bit in sql_select.cc to use my_find_first_bit.

886d740a · Monty · f0b2e765 · 886d740a
Commit 886d740a authored Sep 06, 2024 by Monty
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Showing with 5 additions and 4 deletions

sql/sql_select.cc sql/sql_select.cc +5 -4

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--- a/sql/sql_select.cc
+++ b/sql/sql_select.cc
@@ -6967,12 +6967,13 @@ Item_equal::add_key_fields(JOIN *join, KEY_FIELD **key_fields,
 }
-static uint
+static inline uint
 max_part_bit(key_part_map bits)
 {
-  uint found;
+  if (bits == 0)
-  for (found=0; bits & 1 ; found++,bits>>=1) ;
+    return 0;
-  return found;
+  /* find first zero bit by reverting all bits and find first bit */
+  return my_find_first_bit(~(ulonglong) bits);
 }