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authorAlvaro Herrera <alvherre@alvh.no-ip.org>2018-07-10 15:07:28 -0400
committerAlvaro Herrera <alvherre@alvh.no-ip.org>2018-07-10 15:16:27 -0400
commite7df94f317c979ad176adc0155a3e8af63e68ac9 (patch)
tree3bffd42ebdcac79f2c1e277e556c85a7528c6567 /src/backend/executor/nodeModifyTable.c
parent4cf30f6fdeed4977dfe52bf1d4fda74c883d3760 (diff)
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Better handle pseudotypes as partition keys
We fail to handle polymorphic types properly when they are used as partition keys: we were unnecessarily adding a RelabelType node on top, which confuses code examining the nodes. In particular, this makes predtest.c-based partition pruning not to work, and ruleutils.c to emit expressions that are uglier than needed. Fix it by not adding RelabelType when not needed. In master/11 the new pruning code is separate so it doesn't suffer from this problem, since we already fixed it (in essentially the same way) in e5dcbb88a15d, which also added a few tests; back-patch those tests to pg10 also. But since UPDATE/DELETE still uses predtest.c in pg11, this change improves partitioning for those cases too. Add tests for this. The ruleutils.c behavior change is relevant in pg11/master too. Co-authored-by: Amit Langote <Langote_Amit_f8@lab.ntt.co.jp> Co-authored-by: Álvaro Herrera <alvherre@alvh.no-ip.org> Reviewed-by: Álvaro Herrera <alvherre@alvh.no-ip.org> Reviewed-by: Robert Haas <robertmhaas@gmail.com> Discussion: https://postgr.es/m/54745d13-7ed4-54ac-97d8-ea1eec95ae25@lab.ntt.co.jp
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