Folks,
I've noticed that when coming into an organization, I need to do some
counting on what's in all the tables in a db. This shortens that
process considerably, with the usual caveat that count(*) is a heavy
operation.
By the way, the 3 lines following "godawful hack" point to something
PL/PgSQL ought (imho) to be able to do, namely something like
EXECUTE INTO [ record | rowtype | type ] [sql TEXT string returning a single row];
Here 'tis: version 0.01...
CREATE TYPE table_count AS (table_name TEXT, num_rows INTEGER);
CREATE OR REPLACE FUNCTION count_em_all () RETURNS SETOF table_count
AS '
DECLARE the_count RECORD; t_name RECORD; r table_count%ROWTYPE;
BEGIN FOR t_name IN SELECT c.relname FROM pg_catalog.pg_class c LEFT JOIN
pg_namespace n ON n.oid = c.relnamespace WHERE c.relkind = ''r''
AND n.nspname = ''public'' ORDER BY 1 LOOP -- The next 3 lines are a godawful hack. :P FOR
the_countIN EXECUTE ''SELECT COUNT(*) AS "count" FROM '' || t_name.relname LOOP END LOOP;
r.table_name:= t_name.relname; r.num_rows := the_count.count; RETURN NEXT r; END LOOP; RETURN;
END;
' LANGUAGE plpgsql;
COMMENT ON FUNCTION count_em_all () IS 'Spits out all tables in the public schema and the exact row counts for each.';
--
David Fetter david@fetter.org http://fetter.org/
phone: +1 510 893 6100 mobile: +1 415 235 3778
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