Returning a concatenated string : Function Return « Store Procedure Function « PostgreSQL






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Returning a concatenated string

postgres=#
postgres=#
postgres=# -- Returning a concatenated string
postgres=#
postgres=# CREATE FUNCTION compound_word(text, text) RETURNS text AS '
postgres'#   DECLARE
postgres'#
postgres'#      -- Define aliases for function arguments.
postgres'#     word1 ALIAS FOR $1;
postgres'#     word2 ALIAS FOR $2;
postgres'#
postgres'#   BEGIN
postgres'#
postgres'#      -- Return the resulting joined words.
postgres'#     RETURN word1 || word2;
postgres'#
postgres'#   END;
postgres'#
postgres'# ' LANGUAGE 'plpgsql';
ERROR:  function "compound_word" already exists with same argument types
postgres=#
postgres=# SELECT compound_word('break', 'fast');
 compound_word
---------------
 breakfast
(1 row)

postgres=#








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