Luke Lonergan wrote:

That says it's something else in the path.  As you probably know there is a
page lock taken, a copy of the tuple from the page, lock removed, count
incremented for every iteration of the agg node on a count(*).  Is the same
true of a count(1)?


Sorry Luke - message 3 - I seem to be suffering from a very small working memory buffer myself right now, I think it's after a day of working with DB2 ... :-)

Anyway, as I read src/backend/parser/gram.y:6542 - count(*) is transformed into count(1), so these two are identical.

Cheers (last time tonight, promise!)

Mark

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