SQl is not working?

Question

I am upgrading my table with new version and changed config version too,

getting error :PDOException Object ( [message:protected] => SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1 [string:Exception:private] => [code:protected] => 42000

here is my query :

<?php
$installer = $this;
$installer->startSetup();

$installer->run("ALTER TABLE `asm_tracker` CHANGE COLUMN  `create_at` TIMESTAMP;");
$installer->run("ALTER TABLE `asm_tracker` CHANGE COLUMN  `punch_in_time` TIMESTAMP;");
$installer->run("ALTER TABLE `asm_tracker` CHANGE COLUMN  `punch_out_time` TIMESTAMP;");
$installer->run("ALTER TABLE `asm_tracker` ADD `manager_name` varchar(30) NOT NULL ;");

$installer->endSetup();

?>

want to change DATATYPE and add one column in existing table.

Answer 1

Try this :

$installer = $this;
$installer->startSetup();
$installer->run("ALTER TABLE `asm_tracker` CHANGE `create_at` `create_at` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP;");
$installer->run("ALTER TABLE `asm_tracker` CHANGE `punch_in_time` `punch_in_time` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP;");
$installer->run("ALTER TABLE `asm_tracker` CHANGE `punch_out_time` `punch_out_time` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP;");
$installer->run("ALTER TABLE `asm_tracker` ADD `manager_name` varchar(30) NOT NULL;");
$installer->endSetup();

Answer 2

Try below code:

$installer = $this;
$installer->startSetup();

$installer->run("ALTER TABLE `asm_tracker` CHANGE `create_at` `create_at` TIMESTAMP;");
$installer->run("ALTER TABLE `asm_tracker` CHANGE `punch_in_time` `punch_in_time` TIMESTAMP;");
$installer->run("ALTER TABLE `asm_tracker` CHANGE `punch_out_time` `punch_out_time` TIMESTAMP;");
$installer->run("ALTER TABLE `asm_tracker` ADD `manager_name` varchar(30) NOT NULL;");
$installer->endSetup();

Note: Please add "NOT NULL DEFAULT CURRENT_TIMESTAMP"

Answer 3

You have to use below code after TIMESTAMP:

NOT NULL DEFAULT CURRENT_TIMESTAMP