Hi.
Another question. I have tried to figure this out for over half an
hour now and don't get it. If I start to annoy you, just tell me and I
will search for some longer.
The problem is within the intended ha_myisammrg::write_row:
--- mysql-3.23.40/sql/ha_myisammrg.cc Wed Jul 18 23:19:10 2001
+++ mysql-3.23.40-philemon/sql/ha_myisammrg.cc Thu Aug 30 04:36:49 2001
@@ -67,5 +67,11 @@
int ha_myisammrg::write_row(byte * buf)
{
- return (my_errno=HA_ERR_WRONG_COMMAND);
+ statistic_increment(ha_write_count,&LOCK_status);
+ if (table->time_stamp)
+ update_timestamp(buf+table->time_stamp-1);
+ if (table->next_number_field && buf == table->record[0])
+ return (my_errno=HA_ERR_WRONG_COMMAND);
+ /* update_auto_increment(); [phi] have to check this before allowing it */
+ return myrg_write(file,buf);
}
This is mainly taken from ha_myisam::write_row and I just assured that
everything still makes sense. My problem with that is, that I cannot
figure out what "buf == table->record[0]" is intended to do/mean. I
understand that table->record[0] seems to be a pointer to a "row".
But what does the comparison mean (i.e. when is
(buf == table->record[0]) true and when false?) and at which place in
the source is table->record[0] set to the relevant value?
Thank you,
Benjamin.
