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New version attached. The following is implemented:

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- CLUSTER ALL clusters all the tables that have some index with
  indisclustered set and the calling user owns.
- CLUSTER tablename clusters the named table, using the index with
  indisclustered set.  If no index has the bit set, throws elog(ERROR).
- The multi-relation version (CLUSTER ALL) uses a multitransaction
  approach, similar to what VACUUM does.

Alvaro Herrera
This commit is contained in:
Bruce Momjian
2002-11-15 03:09:39 +00:00
parent 5b7eb4dd45
commit 8bc717cb88
8 changed files with 484 additions and 38 deletions
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64
src/test/regress/expected/cluster.out
View File

@@ -285,3 +285,67 @@ WHERE pg_class.oid=indexrelid
clstr_tst_c
(1 row)
-- Verify that clustering all tables does in fact cluster the right ones
CREATE USER clstr_user;
CREATE TABLE clstr_1 (a INT PRIMARY KEY);
NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index 'clstr_1_pkey' for table 'clstr_1'
CREATE TABLE clstr_2 (a INT PRIMARY KEY);
NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index 'clstr_2_pkey' for table 'clstr_2'
CREATE TABLE clstr_3 (a INT PRIMARY KEY);
NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index 'clstr_3_pkey' for table 'clstr_3'
ALTER TABLE clstr_1 OWNER TO clstr_user;
ALTER TABLE clstr_3 OWNER TO clstr_user;
GRANT SELECT ON clstr_2 TO clstr_user;
INSERT INTO clstr_1 VALUES (2);
INSERT INTO clstr_1 VALUES (1);
INSERT INTO clstr_2 VALUES (2);
INSERT INTO clstr_2 VALUES (1);
INSERT INTO clstr_3 VALUES (2);
INSERT INTO clstr_3 VALUES (1);
CLUSTER clstr_1_pkey ON clstr_1;
CLUSTER clstr_2_pkey ON clstr_2;
SELECT * FROM clstr_1 UNION ALL
SELECT * FROM clstr_2 UNION ALL
SELECT * FROM clstr_3;
a
---
1
2
1
2
2
1
(6 rows)
-- revert to the original state
DELETE FROM clstr_1;
DELETE FROM clstr_2;
DELETE FROM clstr_3;
INSERT INTO clstr_1 VALUES (2);
INSERT INTO clstr_1 VALUES (1);
INSERT INTO clstr_2 VALUES (2);
INSERT INTO clstr_2 VALUES (1);
INSERT INTO clstr_3 VALUES (2);
INSERT INTO clstr_3 VALUES (1);
-- this user can only cluster clstr_1 and clstr_3, but the latter
-- has not been clustered
SET SESSION AUTHORIZATION clstr_user;
CLUSTER ALL;
SELECT * FROM clstr_1 UNION ALL
SELECT * FROM clstr_2 UNION ALL
SELECT * FROM clstr_3;
a
---
1
2
2
1
2
1
(6 rows)
-- clean up
\c -
DROP TABLE clstr_1;
DROP TABLE clstr_3;
DROP USER clstr_user;

56
src/test/regress/sql/cluster.sql
View File

@@ -86,3 +86,59 @@ WHERE pg_class.oid=indexrelid
AND indrelid=pg_class_2.oid
AND pg_class_2.relname = 'clstr_tst'
AND indisclustered;
-- Verify that clustering all tables does in fact cluster the right ones
CREATE USER clstr_user;
CREATE TABLE clstr_1 (a INT PRIMARY KEY);
CREATE TABLE clstr_2 (a INT PRIMARY KEY);
CREATE TABLE clstr_3 (a INT PRIMARY KEY);
ALTER TABLE clstr_1 OWNER TO clstr_user;
ALTER TABLE clstr_3 OWNER TO clstr_user;
GRANT SELECT ON clstr_2 TO clstr_user;
INSERT INTO clstr_1 VALUES (2);
INSERT INTO clstr_1 VALUES (1);
INSERT INTO clstr_2 VALUES (2);
INSERT INTO clstr_2 VALUES (1);
INSERT INTO clstr_3 VALUES (2);
INSERT INTO clstr_3 VALUES (1);
-- "CLUSTER <tablename>" on a table that hasn't been clustered
CLUSTER clstr_2;
CLUSTER clstr_1_pkey ON clstr_1;
CLUSTER clstr_2_pkey ON clstr_2;
SELECT * FROM clstr_1 UNION ALL
SELECT * FROM clstr_2 UNION ALL
SELECT * FROM clstr_3;
-- revert to the original state
DELETE FROM clstr_1;
DELETE FROM clstr_2;
DELETE FROM clstr_3;
INSERT INTO clstr_1 VALUES (2);
INSERT INTO clstr_1 VALUES (1);
INSERT INTO clstr_2 VALUES (2);
INSERT INTO clstr_2 VALUES (1);
INSERT INTO clstr_3 VALUES (2);
INSERT INTO clstr_3 VALUES (1);
-- this user can only cluster clstr_1 and clstr_3, but the latter
-- has not been clustered
SET SESSION AUTHORIZATION clstr_user;
CLUSTER ALL;
SELECT * FROM clstr_1 UNION ALL
SELECT * FROM clstr_2 UNION ALL
SELECT * FROM clstr_3;
-- cluster a single table using the indisclustered bit previously set
DELETE FROM clstr_1;
INSERT INTO clstr_1 VALUES (2);
INSERT INTO clstr_1 VALUES (1);
CLUSTER clstr_1;
SELECT * FROM clstr_1;
-- clean up
\c -
DROP TABLE clstr_1;
DROP TABLE clstr_3;
DROP USER clstr_user;