Transcription of PostgreSQL Functions By Example
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PostgreSQL Functions By Example
OverviewFunction BasicsBy ExamplePostgreSQL Functions By ExampleJoe GroupJanuary 20, 2012 Joe ConwaySCALE10X-PGDayOverviewFunction BasicsBy ExampleIntroductionUsesVarietiesLanguage sWhat are Functions ?Full fledged SQL objectsMany other database objects are implemented with themFundamental part of PostgreSQL s system architectureCreated withCREATE FUNCTIONE xecuted through normal SQLtarget-list:SELECT myfunc(f1) FROM foo;FROM clause:SELECT * FROM myfunc();WHERE clause:SELECT * FROM foo WHERE myfunc(f1) = 42;Joe ConwaySCALE10X-PGDayOverviewFunction BasicsBy ExampleIntroductionUsesVarietiesLanguage sHow are they Used?FunctionsOperatorsData typesIndex methodsCastsTriggersAggregatesJoe ConwaySCALE10X-PGDayOverviewFunction BasicsBy ExampleIntroductionUsesVarietiesLanguage sWhat Forms Can They Take?
Introduction Uses Varieties Languages What are Functions? Full edged SQL objects Many other database objects are implemented with them Fundamental part of PostgreSQL’s system architecture Created with CREATE FUNCTION Executed through normal SQL target-list: SELECT myfunc(f1) FROM foo; FROM clause: SELECT * FROM myfunc(); WHERE clause:
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