diff options
Diffstat (limited to 'contrib/pg_freespacemap/sql/pg_freespacemap.sql')
-rw-r--r-- | contrib/pg_freespacemap/sql/pg_freespacemap.sql | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/contrib/pg_freespacemap/sql/pg_freespacemap.sql b/contrib/pg_freespacemap/sql/pg_freespacemap.sql new file mode 100644 index 0000000..06275d8 --- /dev/null +++ b/contrib/pg_freespacemap/sql/pg_freespacemap.sql @@ -0,0 +1,32 @@ +CREATE EXTENSION pg_freespacemap; + +CREATE TABLE freespace_tab (c1 int) WITH (autovacuum_enabled = off); +CREATE INDEX freespace_brin ON freespace_tab USING brin (c1); +CREATE INDEX freespace_btree ON freespace_tab USING btree (c1); +CREATE INDEX freespace_hash ON freespace_tab USING hash (c1); + +-- report all the sizes of the FSMs for all the relation blocks. +WITH rel AS (SELECT oid::regclass AS id FROM pg_class WHERE relname ~ 'freespace') + SELECT rel.id, fsm.blkno, (fsm.avail > 0) AS is_avail + FROM rel, LATERAL pg_freespace(rel.id) AS fsm + ORDER BY 1, 2; + +INSERT INTO freespace_tab VALUES (1); +VACUUM freespace_tab; +WITH rel AS (SELECT oid::regclass AS id FROM pg_class WHERE relname ~ 'freespace') + SELECT rel.id, fsm.blkno, (fsm.avail > 0) AS is_avail + FROM rel, LATERAL pg_freespace(rel.id) AS fsm + ORDER BY 1, 2; + +DELETE FROM freespace_tab; +VACUUM freespace_tab; +WITH rel AS (SELECT oid::regclass AS id FROM pg_class WHERE relname ~ 'freespace') + SELECT rel.id, fsm.blkno, (fsm.avail > 0) AS is_avail + FROM rel, LATERAL pg_freespace(rel.id) AS fsm + ORDER BY 1, 2; + +-- failures with incorrect block number +SELECT * FROM pg_freespace('freespace_tab', -1); +SELECT * FROM pg_freespace('freespace_tab', 4294967295); + +DROP TABLE freespace_tab; |