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CREATE TABLE raw_log_2011_4 (
id bigint(20) NOT NULL AUTO_INCREMENT,
logid char(16) NOT NULL,
tid char(16) NOT NULL,
reporterip char(46) DEFAULT NULL,
ftime datetime DEFAULT NULL,
KEY id (id)
) ENGINE=InnoDB AUTO_INCREMENT=286802795 DEFAULT CHARSET=utf8
PARTITION BY hash (day(ftime)) partitions 31;
explain partitions select * from raw_log_2011_4 where day(ftime) = 30;
explain partitions select * from raw_log_2011_4 where ftime = '2011-03-30';
CREATE TABLE raw_log_2011_4 (
id bigint(20) NOT NULL AUTO_INCREMENT,
logid char(16) NOT NULL,
tid char(16) NOT NULL,
reporterip char(46) DEFAULT NULL,
ftime datetime DEFAULT NULL,
KEY id (id)
) ENGINE=InnoDB AUTO_INCREMENT=286802795 DEFAULT CHARSET=utf8
PARTITION BY hash (to_days(ftime)) partitions 31;
explain partitions select * from raw_log_2011_4 where to_days(ftime) = to_days('2011-03-30');