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96e092dc73
WL#2474 "Multi Range Read: Change the default MRR implementation to implement new MRR interface"
WL#2475 "Batched range read functions for MyISAM/InnoDb"
"Index condition pushdown for MyISAM/InnoDB"
Igor's fix from sp1r-igor@olga.mysql.com-20080330055902-07614:
There could be observed the following problems:
1. EXPLAIN did not mention pushdown conditions from on expressions in the
'extra' column. As a result if a query had no where conditions pushed
down to a table, but had on conditions pushed to this table the 'extra'
column in the EXPLAIN for the table missed 'using where'.
2. Conditions for ref access were not eliminated from on expressions
though such conditions were eliminated from the where condition.
54 lines
3.4 KiB
Text
54 lines
3.4 KiB
Text
CREATE TABLE t1(c1 TIMESTAMP NOT NULL, c2 TIMESTAMP NULL, c3 DATE, c4 DATETIME, PRIMARY KEY(c1), UNIQUE INDEX(c2));
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INSERT INTO t1 VALUES('98-12-31 11:30:45','98.12.31 11+30+45','98-12-31 11:30:45','98.12.31 11+30+45'),('98/12/30 11*30*45','98@12@30 11^30^45','98/12/30 11*30*45','98@12@30 11^30^45'),('98-12-29','98.12.29','98-12-29','98.12.29'),('98/12/28','98@12@28','98/12/28','98@12@28');
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Warnings:
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Note 1265 Data truncated for column 'c3' at row 1
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Note 1265 Data truncated for column 'c3' at row 2
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INSERT INTO t1 VALUES('20070523091528','070523091528','20070524091528','070524091528'),('20070525','070525','20070526','070526');
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Warnings:
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Note 1265 Data truncated for column 'c3' at row 1
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INSERT INTO t1 VALUES(19830905132800,830905132800,19830906132800,830906132800),(19830907,830907,19830908,830908);
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Warnings:
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Note 1265 Data truncated for column 'c3' at row 1
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SET TIMESTAMP=1233216687;
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INSERT INTO t1 VALUES(NOW(),CURRENT_DATE,NOW(),CURRENT_DATE);
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Warnings:
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Note 1265 Data truncated for column 'c3' at row 1
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INSERT INTO t1 VALUES('2008-01-01',NULL,'08-01-02','08/01/03');
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INSERT INTO t1(c1,c2) VALUES('08/01/17',NULL);
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DELETE FROM t1 WHERE c1='08/01/17' AND c2 IS NULL;
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INSERT INTO t1 VALUES('','','08-01-04','08/01/05') /* Inserts zero dates for '' strings */;
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Warnings:
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Warning 1265 Data truncated for column 'c1' at row 1
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Warning 1265 Data truncated for column 'c2' at row 1
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INSERT INTO t1 VALUES('1971-01-01 00:00:01','1980-01-01 00:00:01','2009-01-01','2009-01-02'),('1990-01-01 00:00:01','2000-01-01 00:00:01','2009-01-03','2009-01-04'),('2038-01-09 03:14:07','2038-01-09 03:14:07','2009-01-05','2009-01-06');
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SELECT * FROM t1;
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c1 c2 c3 c4
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0000-00-00 00:00:00 0000-00-00 00:00:00 2008-01-04 2008-01-05 00:00:00
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1971-01-01 00:00:01 1980-01-01 00:00:01 2009-01-01 2009-01-02 00:00:00
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1983-09-05 13:28:00 1983-09-05 13:28:00 1983-09-06 1983-09-06 13:28:00
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1983-09-07 00:00:00 1983-09-07 00:00:00 1983-09-08 1983-09-08 00:00:00
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1990-01-01 00:00:01 2000-01-01 00:00:01 2009-01-03 2009-01-04 00:00:00
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1998-12-28 00:00:00 1998-12-28 00:00:00 1998-12-28 1998-12-28 00:00:00
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1998-12-29 00:00:00 1998-12-29 00:00:00 1998-12-29 1998-12-29 00:00:00
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1998-12-30 11:30:45 1998-12-30 11:30:45 1998-12-30 1998-12-30 11:30:45
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1998-12-31 11:30:45 1998-12-31 11:30:45 1998-12-31 1998-12-31 11:30:45
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2007-05-23 09:15:28 2007-05-23 09:15:28 2007-05-24 2007-05-24 09:15:28
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2007-05-25 00:00:00 2007-05-25 00:00:00 2007-05-26 2007-05-26 00:00:00
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2008-01-01 00:00:00 NULL 2008-01-02 2008-01-03 00:00:00
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2009-01-29 11:11:27 2009-01-29 00:00:00 2009-01-29 2009-01-29 00:00:00
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2038-01-09 03:14:07 2038-01-09 03:14:07 2009-01-05 2009-01-06 00:00:00
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SELECT * FROM t1 WHERE c1 BETWEEN '0000-00-00' AND '2010-00-01 00:00:00' ORDER BY c1 DESC LIMIT 2;
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c1 c2 c3 c4
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2009-01-29 11:11:27 2009-01-29 00:00:00 2009-01-29 2009-01-29 00:00:00
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2008-01-01 00:00:00 NULL 2008-01-02 2008-01-03 00:00:00
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Warnings:
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Warning 1292 Incorrect datetime value: '2010-00-01 00:00:00' for column 'c1' at row 1
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Warning 1292 Incorrect datetime value: '2010-00-01 00:00:00' for column 'c1' at row 1
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SELECT * FROM t1 WHERE c2 BETWEEN '1971-01-01 00:00:01' AND '2010-10-00 00:00:00' ORDER BY c2 DESC LIMIT 2;
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c1 c2 c3 c4
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2009-01-29 11:11:27 2009-01-29 00:00:00 2009-01-29 2009-01-29 00:00:00
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2007-05-25 00:00:00 2007-05-25 00:00:00 2007-05-26 2007-05-26 00:00:00
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Warnings:
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Warning 1292 Incorrect datetime value: '2010-10-00 00:00:00' for column 'c2' at row 1
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Warning 1292 Incorrect datetime value: '2010-10-00 00:00:00' for column 'c2' at row 1
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DROP TABLE t1;
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