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Bug#19978: INSERT .. ON DUPLICATE erroneously reports some records were

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updated.

INSERT ... ON DUPLICATE KEY UPDATE reports that a record was updated when
the duplicate key occurs even if the record wasn't actually changed
because the update values are the same as those in the record.

Now the compare_record() function is used to check whether the record was
changed and the update of a record reported only if the record differs
from the original one.
This commit is contained in:
evgen@moonbone.local
2007-02-07 00:46:03 +03:00
parent 5092f7ab26
commit 968369906e
5 changed files with 43 additions and 11 deletions
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2
sql/sql_update.cc
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@ -26,7 +26,7 @@
/* Return 0 if row hasn't changed */
static bool compare_record(TABLE *table, query_id_t query_id)
bool compare_record(TABLE *table, query_id_t query_id)
{
if (table->s->blob_fields + table->s->varchar_fields == 0)
return cmp_record(table,record[1]);