41 lines
1.0 KiB
MySQL
41 lines
1.0 KiB
MySQL
-- Drop functions
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drop function int_agg_state (int4, int4);
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drop function int_agg_final_array (int4);
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drop aggregate int_array_aggregate(int4);
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drop function int_array_enum (int4[]);
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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 (int4, int4)
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returns int4
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as 'MODULE_FILENAME','int_agg_state'
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language 'c';
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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 (int4)
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returns int4[]
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as 'MODULE_FILENAME','int_agg_final_array'
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language 'c';
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-- The aggration funcion.
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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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(
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BASETYPE = int4,
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SFUNC = int_agg_state,
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STYPE = int4,
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FINALFUNC = int_agg_final_array,
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INITCOND = 0
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);
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-- The enumeration function
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-- returns each element in a one dimentional 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 'MODULE_FILENAME','int_enum'
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language 'c';
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