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authorTom Lane <tgl@sss.pgh.pa.us>2011-07-21 11:32:46 -0400
committerTom Lane <tgl@sss.pgh.pa.us>2011-07-21 11:32:46 -0400
commit0ce7676aa03a2501fde949fea211ba5cd84c2ded (patch)
tree792173ad0b228f5a08db6aa3edb0dad38dad7aee /src/backend/commands/functioncmds.c
parentaaf15e5c1cf8d2c27d2f9841343f00027762cb4e (diff)
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Make xpath() do something useful with XPath expressions that return scalars.
Previously, xpath() simply returned an empty array if the expression did not yield a node set. This is useless for expressions that return scalars, such as one with name() at the top level. Arrange to return the scalar value as a single-element xml array, instead. (String values will be suitably escaped.) This change will also cause xpath_exists() to return true, not false, for such expressions. Florian Pflug, reviewed by Radoslaw Smogura
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