pgsql: Fix syntax in extract() examples Author: Erik Rijkers

Log Message:
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Fix syntax in extract() examples

Author: Erik Rijkers <er@xs4all.nl>

Modified Files:
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pgsql/doc/src/sgml:
func.sgml (r1.491 -> r1.492)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/func.sgml?r1=1.491&amp;r2=1.492)