Commit 47a70282 authored by unknown's avatar unknown

BUG#22937 - Valgrind failure in 'merge' test (ha_myisammrg.cc:329)

This is addition to fix for bug21617. Valgrind reports an error when
opening merge table that has underlying tables with less indexes than
in a merge table itself.

Copy at most min(file->keys, table->key_parts) elements from rec_per_key array.
This fixes problems when merge table and subtables have different number of keys.


sql/ha_myisammrg.cc:
  Copy at most min(file->keys, table->key_parts) elements from rec_per_key array.
  This fixes problems when merge table and subtables have different number of keys.
parent 9076d70e
......@@ -249,9 +249,22 @@ void ha_myisammrg::info(uint flag)
if (flag & HA_STATUS_CONST)
{
if (table->key_parts && info.rec_per_key)
{
#ifdef HAVE_purify
/*
valgrind may be unhappy about it, because optimizer may access values
between file->keys and table->key_parts, that will be uninitialized.
It's safe though, because even if opimizer will decide to use a key
with such a number, it'll be an error later anyway.
*/
bzero((char*) table->key_info[0].rec_per_key,
sizeof(table->key_info[0].rec_per_key) * table->key_parts);
#endif
memcpy((char*) table->key_info[0].rec_per_key,
(char*) info.rec_per_key,
sizeof(table->key_info[0].rec_per_key)*table->key_parts);
sizeof(table->key_info[0].rec_per_key) *
min(file->keys, table->key_parts));
}
}
}
......
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