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Bug#27127, Incorrect behaviour of timestamp column with DEFAULT CURRENT_TIMESTAMP

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correct the bitmap_set_bit when a field is timestamp and described 
with default CURRENT_TIMESTAMP or on update CURRENT_TIMESTAMP,
then it will reduce a little time cost when the field doesnot need 
to write.


sql/sql_update.cc:
  here table->timestamp_field represent only the timestamp field related to CURRENT_TIMESTAMP,
  when the timestamp_field_type is 0 or 1, it need not to write the field data further.
This commit is contained in:
unknown 2007-03-22 12:16:52 +08:00
commit 774a19554b
1 changed files with 4 additions and 2 deletions
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6
sql/sql_update.cc
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@ -201,8 +201,10 @@ int mysql_update(THD *thd,
table->timestamp_field_type= TIMESTAMP_NO_AUTO_SET;
else
{
bitmap_set_bit(table->write_set,
table->timestamp_field->field_index);
if (table->timestamp_field_type == TIMESTAMP_AUTO_SET_ON_UPDATE ||
table->timestamp_field_type == TIMESTAMP_AUTO_SET_ON_BOTH)
bitmap_set_bit(table->write_set,
table->timestamp_field->field_index);
}
}