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2 Commits

Author SHA1 Message Date
Peter Eisentraut
0779f2ba2d Fix parse tree of DROP TRANSFORM and COMMENT ON TRANSFORM 
The plain C string language name needs to be wrapped in makeString() so
that the parse tree is copyable.  This is detectable by
-DCOPY_PARSE_PLAN_TREES.  Add a test case for the COMMENT case.

Also make the quoting in the error messages more consistent.

discovered by Tom Lane
 2015-05-18 22:55:14 -04:00
Peter Eisentraut
cac7658205 Add transforms feature 
This provides a mechanism for specifying conversions between SQL data
types and procedural languages.  As examples, there are transforms
for hstore and ltree for PL/Perl and PL/Python.

reviews by Pavel Stěhule and Andres Freund
 2015-04-26 10:33:14 -04:00