Pothanaboyina Trimurthy Issue with timestamp columns while working with MySQL load data in file
Apr 12, 2015; 18:22
Pothanaboyina Trimurthy
Issue with timestamp columns while working with MySQL load data in file
Hi All,
I am facing an issue with timestamp columns while working with MySQL load data in file, I am loading around a million records which is taking around 2 hours to complete the load data.
Before get into more details about the problem, first let me share the table structure.
CREATE TABLE `test_load_data` (
`id1` int(11) DEFAULT NULL,
`col10` varchar(255) DEFAULT NULL,
`DB_CREATED_DATETIME` datetime DEFAULT NULL,
`DB_MODIFIED_DATETIME` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
) ENGINE=InnoDB DEFAULT CHARSET=utf8
;
LOAD DATA LOCAL INFILE '/x.dat' INTO TABLE test_load_data
FIELDS TERMINATED BY '\t'
LINES TERMINATED BY '\n'
(id1,col10,@DB_CREATED_DATETIME)
SET DB_CREATED_DATETIME = NOW()
;
mysql> select DB_CREATED_DATETIME,DB_MODIFIED_DATETIME,count(1) from test_load_data group by DB_CREATED_DATETIME,DB_MODIFIED_DATETIME;
The problem is , as mentioned the load data is taking around 2 hours, I have 2 timestamp columns for one column I am passing the input through load data, and for the column "DB_MODIFIED_DATETIME" no input is provided, At the end of the load data I could see only one timestamp value for both the columns, though the load data takes 2 hours to load the data.
Can any one explain how exactly the load data infile works, and why only a single timestamp is inserting for all 1 million records though the load data taking around 2 hours.
Thank you in advance.
-- Thanks, Trimurthy P Mobile : +91 97397 64298 http://mysqlinternals.blogspot.in/ https://www.linkedin.com/pub/trimurthy-pothanaboyina/5a/9a9/96b
Apr 13
hsv Re: Issue with timestamp columns while working with MySQL load data in file
Apr 13, 2015; 12:40
hsv
Re: Issue with timestamp columns while working with MySQL load data in file
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