check for existence of the columns beefore trying to add them
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@ -1,3 +1,27 @@
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ALTER TABLE `Monitors` ADD `Colours` TINYINT UNSIGNED NOT NULL DEFAULT '1' AFTER `Height`;
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ALTER TABLE `Monitors` ADD `Deinterlacing` INT UNSIGNED NOT NULL DEFAULT '0' AFTER `Orientation`;
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SET @s = (SELECT IF(
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(SELECT COUNT(*)
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FROM INFORMATION_SCHEMA.COLUMNS
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WHERE table_name = 'Monitors'
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AND table_schema = DATABASE()
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AND column_name = 'Colours'
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) > 0,
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"SELECT 'Column Colours exists in Monitors'",
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"ALTER TABLE `Monitors` ADD `Colours` TINYINT UNSIGNED NOT NULL DEFAULT '1' AFTER `Height`"
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));
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PREPARE stmt FROM @s;
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EXECUTE stmt;
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SET @s = (SELECT IF(
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(SELECT COUNT(*)
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FROM INFORMATION_SCHEMA.COLUMNS
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WHERE table_name = 'Monitors'
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AND table_schema = DATABASE()
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AND column_name = 'Deinterlacing'
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) > 0,
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"SELECT 'Column Deinterlacing exists in Monitors'",
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"ALTER TABLE `Monitors` ADD `Deinterlacing` INT UNSIGNED NOT NULL DEFAULT '0' AFTER `Orientation`"
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));
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PREPARE stmt FROM @s;
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EXECUTE stmt;
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