Bruce Momjian wrote:
* Flush cached query plans when the dependent objects change,
when the cardinality of parameters changes dramatically, or
when new ANALYZE statistics are available
Wouldn't it also make sense to flush a cached query plan when after
execution it is determined that one or more assumptions that the cached
query plan was based on was found to be off? Like the query plan was
based on the assumption that a particular table would only return a hand
full of rows, but in reality it returned a few thousand.
regards,
Lukas
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