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Fix data corruption bug reported by robjderr (#1010664).

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pg_reorg broke catalog definition if the target table had any dropped columns.
Now pg_reorg removes dropped columns and renumbers valid columns.
You can use pg_reorg to shrink column definitions if you have many dropped
columns. (without pg_reorg, dropped columns are filled with zero forever)
This commit is contained in:
Takahiro Itagaki
2009-07-02 09:50:58 +00:00
parent 5fe3f037be
commit 6155932b60
10 changed files with 251 additions and 136 deletions
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31
bin/sql/reorg.sql
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@ -6,7 +6,7 @@ CREATE TABLE tbl_cluster (
col1 int,
col2 timestamp,
":-)" text,
primary key(":-)", col1)
PRIMARY KEY (":-)", col1)
) WITH (fillfactor = 70);
CREATE INDEX cidx_cluster ON tbl_cluster (col2, length(":-)"));
@ -34,6 +34,18 @@ CREATE TABLE tbl_gistkey (
CREATE INDEX cidx_circle ON tbl_gistkey USING gist (c);
ALTER TABLE tbl_gistkey CLUSTER ON cidx_circle;
CREATE TABLE tbl_with_dropped_column (
d1 text,
c1 text,
id integer PRIMARY KEY,
d2 text,
c2 text,
d3 text
);
ALTER TABLE tbl_with_dropped_column CLUSTER ON tbl_with_dropped_column_pkey;
CREATE INDEX idx_c1c2 ON tbl_with_dropped_column (c1, c2);
CREATE INDEX idx_c2c1 ON tbl_with_dropped_column (c2, c1);
--
-- insert data
--
@ -53,6 +65,18 @@ INSERT INTO tbl_only_ckey VALUES(2, '2008-02-01 00:00:00', 'def');
INSERT INTO tbl_gistkey VALUES(1, '<(1,2),3>');
INSERT INTO tbl_gistkey VALUES(2, '<(4,5),6>');
INSERT INTO tbl_with_dropped_column VALUES('d1', 'c1', 2, 'd2', 'c2', 'd3');
INSERT INTO tbl_with_dropped_column VALUES('d1', 'c1', 1, 'd2', 'c2', 'd3');
ALTER TABLE tbl_with_dropped_column DROP COLUMN d1;
ALTER TABLE tbl_with_dropped_column DROP COLUMN d2;
ALTER TABLE tbl_with_dropped_column DROP COLUMN d3;
ALTER TABLE tbl_with_dropped_column ADD COLUMN c3 text;
--
-- before
--
SELECT * FROM tbl_with_dropped_column;
--
-- do reorg
--
@ -62,18 +86,20 @@ INSERT INTO tbl_gistkey VALUES(2, '<(4,5),6>');
\! pg_reorg --dbname=contrib_regression --table=tbl_cluster
--
-- results
-- after
--
\d tbl_cluster
\d tbl_gistkey
\d tbl_only_ckey
\d tbl_only_pkey
\d tbl_with_dropped_column
SELECT col1, to_char(col2, 'YYYY-MM-DD HH24:MI:SS'), ":-)" FROM tbl_cluster;
SELECT * FROM tbl_only_ckey ORDER BY 1;
SELECT * FROM tbl_only_pkey ORDER BY 1;
SELECT * FROM tbl_gistkey ORDER BY 1;
SELECT * FROM tbl_with_dropped_column;
--
-- clean up
@ -83,4 +109,5 @@ DROP TABLE tbl_cluster;
DROP TABLE tbl_only_pkey;
DROP TABLE tbl_only_ckey;
DROP TABLE tbl_gistkey;
DROP TABLE tbl_with_dropped_column;
RESET client_min_messages;