Presumably it can't _ever_ know without being explicitly told, because
even for a plain SELECT there might be triggers involved that update
tables, or it might be a select of a stored proc, etc. So in the
general case, you can't assume that a select doesn't cause an update,
and you can't be sure that the table list in an update is a complete
list of the tables that might be updated.
Tatsuo Ishii wrote:
Can I ask a question?
Suppose table A gets updated on the master at time 00:00. Until 00:03
pgpool needs to send all queries regarding A to the master only. My
question is, how can pgpool know a query is related to A?
--
Tatsuo Ishii
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