Thread: pgsql: Fix estimate_expression_value to constant-fold SQLValueFunction

Fix estimate_expression_value to constant-fold SQLValueFunction nodes.

Oversight in my commit 0bb51aa96.  Noted while poking at a recent
bug report --- HEAD's estimates for a query using CURRENT_DATE
were unexpectedly much worse than 9.6's.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/4e20511d5b8ba427730e09be45f9458f667f9c1e

Modified Files
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src/backend/optimizer/util/clauses.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)