36 lines
1.0 KiB
SQL
36 lines
1.0 KiB
SQL
/* contrib/intagg/int_aggregate.sql */
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-- Adjust this setting to control where the objects get created.
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SET search_path = public;
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-- Internal function for the aggregate
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-- Is called for each item in an aggregation
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CREATE OR REPLACE FUNCTION int_agg_state (internal, int4)
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RETURNS internal
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AS 'array_agg_transfn'
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LANGUAGE INTERNAL;
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-- Internal function for the aggregate
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-- Is called at the end of the aggregation, and returns an array.
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CREATE OR REPLACE FUNCTION int_agg_final_array (internal)
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RETURNS int4[]
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AS 'array_agg_finalfn'
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LANGUAGE INTERNAL;
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-- The aggregate function itself
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-- uses the above functions to create an array of integers from an aggregation.
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CREATE AGGREGATE int_array_aggregate (
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BASETYPE = int4,
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SFUNC = int_agg_state,
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STYPE = internal,
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FINALFUNC = int_agg_final_array
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);
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-- The enumeration function
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-- returns each element in a one dimensional integer array
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-- as a row.
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CREATE OR REPLACE FUNCTION int_array_enum(int4[])
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RETURNS setof integer
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AS 'array_unnest'
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LANGUAGE INTERNAL IMMUTABLE STRICT;
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