Melvin Davidson wrote:
> OK, one more time.
>
> Yes I know that right click count does that!
>
> I know about select count(*).
> I know about Right-click -> Count
>
> The question was/is "What is the equivalent SQL function to update the
> Rows(counted) value?
Right, one more time :-)
There is no SQL function. It just does a SELECT count(*) and updates the
value stored in memory (in the pgTable object to be precise).
> IOW, What is the underlying code in Right-click -> Count?
Ultimately, once you get clear of all the menu handling code you get to:
void pgTable::UpdateRows()
{ pgSet *props = ExecuteSet(wxT("SELECT count(*) AS rows FROM ONLY ")
+ GetQuotedFullIdentifier()); if (props) { rows = props->GetLongLong(0); delete props;
rowsCounted= true; }
}
pgTable.rows contains the row count.
pgTable.rowsCounted is a flag that indicates that a count has been done,
rather than an estimate made (estimates come from pg_class.reltuples,
which is populated by ANALYZE).
Regards, Dave
