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Adjust nodeFunctionscan.c to reset transient memory context between calls

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to the table function, thus preventing memory leakage accumulation across
calls.  This means that SRFs need to be careful to distinguish permanent
and local storage; adjust code and documentation accordingly.  Patch by
Joe Conway, very minor tweaks by Tom Lane.
This commit is contained in:
Tom Lane
2002-08-29 17:14:33 +00:00
parent 0201dac1c3
commit e4186762ff
10 changed files with 154 additions and 134 deletions
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26
contrib/pgstattuple/pgstattuple.sql.in
View File

@@ -1,16 +1,16 @@
DROP VIEW pgstattuple_view CASCADE;
CREATE VIEW pgstattuple_view AS
SELECT
0::BIGINT AS table_len, -- physical table length in bytes
0::BIGINT AS tuple_count, -- number of live tuples
0::BIGINT AS tuple_len, -- total tuples length in bytes
0.0::FLOAT AS tuple_percent, -- live tuples in %
0::BIGINT AS dead_tuple_count, -- number of dead tuples
0::BIGINT AS dead_tuple_len, -- total dead tuples length in bytes
0.0::FLOAT AS dead_tuple_percent, -- dead tuples in %
0::BIGINT AS free_space, -- free space in bytes
0.0::FLOAT AS free_percent; -- free space in %
DROP TYPE pgstattuple_type CASCADE;
CREATE TYPE pgstattuple_type AS (
table_len BIGINT, -- physical table length in bytes
tuple_count BIGINT, -- number of live tuples
tuple_len BIGINT, -- total tuples length in bytes
tuple_percent FLOAT, -- live tuples in %
dead_tuple_count BIGINT, -- number of dead tuples
dead_tuple_len BIGINT, -- total dead tuples length in bytes
dead_tuple_percent FLOAT, -- dead tuples in %
free_space BIGINT, -- free space in bytes
free_percent FLOAT -- free space in %
);
CREATE OR REPLACE FUNCTION pgstattuple(text) RETURNS SETOF pgstattuple_view
CREATE OR REPLACE FUNCTION pgstattuple(text) RETURNS pgstattuple_type
AS 'MODULE_PATHNAME', 'pgstattuple'
LANGUAGE 'c' WITH (isstrict);