38 lines
1.1 KiB
SQL
38 lines
1.1 KiB
SQL
/* contrib/intagg/intagg--1.1.sql */
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-- complain if script is sourced in psql, rather than via CREATE EXTENSION
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\echo Use "CREATE EXTENSION intagg" to load this file. \quit
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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 FUNCTION int_agg_state (internal, int4)
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RETURNS internal
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AS 'array_agg_transfn'
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PARALLEL SAFE
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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 FUNCTION int_agg_final_array (internal)
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RETURNS int4[]
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AS 'array_agg_finalfn'
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PARALLEL SAFE
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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(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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PARALLEL = SAFE
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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 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 PARALLEL SAFE;
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