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Tom Lane 5d44fff01e In postgres_fdw, allow CASE expressions to be pushed to the remote server. ... This is simple enough except for the need to check whether CaseTestExpr nodes have a collation that is not derived from a remote Var. For that, examine the CASE's "arg" expression and then pass that info down into the recursive examination of the WHEN expressions. Alexander Pyhalov, reviewed by Gilles Darold and myself Discussion: https://postgr.es/m/fda09032e90d85d9b726a41e03f9097f@postgrespro.ru		4 years ago
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postgres_fdw.sql	In postgres_fdw, allow CASE expressions to be pushed to the remote server.	4 years ago