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note on aggregate

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Paul Trowbridge 2020-05-26 11:33:51 -04:00
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postgres/aggregate.md
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@ -1,3 +1,8 @@
To extract aggregate definitions can select from `pg_aggregate`
SQL for current aggregates I'm using now:
```
CREATE OR REPLACE FUNCTION public.jsonb_concat( CREATE OR REPLACE FUNCTION public.jsonb_concat(
state jsonb, state jsonb,
concat jsonb) concat jsonb)
@ -40,4 +45,5 @@ CREATE AGGREGATE public.jsonb_obj_aggc(jsonb) (
SFUNC=public.jsonb_concat, SFUNC=public.jsonb_concat,
STYPE=jsonb, STYPE=jsonb,
INITCOND='{}' INITCOND='{}'
); );
```