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check for existence of the columns beefore trying to add them

This commit is contained in:
Isaac Connor 2014-10-22 10:31:23 -04:00
parent e23c756ca4
commit 85529efffc
1 changed files with 26 additions and 2 deletions
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28
db/zm_update-1.26.0.sql
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@ -1,3 +1,27 @@
ALTER TABLE `Monitors` ADD `Colours` TINYINT UNSIGNED NOT NULL DEFAULT '1' AFTER `Height`; SET @s = (SELECT IF(
ALTER TABLE `Monitors` ADD `Deinterlacing` INT UNSIGNED NOT NULL DEFAULT '0' AFTER `Orientation`; (SELECT COUNT(*)
FROM INFORMATION_SCHEMA.COLUMNS
WHERE table_name = 'Monitors'
AND table_schema = DATABASE()
AND column_name = 'Colours'
) > 0,
"SELECT 'Column Colours exists in Monitors'",
"ALTER TABLE `Monitors` ADD `Colours` TINYINT UNSIGNED NOT NULL DEFAULT '1' AFTER `Height`"
));
PREPARE stmt FROM @s;
EXECUTE stmt;
SET @s = (SELECT IF(
(SELECT COUNT(*)
FROM INFORMATION_SCHEMA.COLUMNS
WHERE table_name = 'Monitors'
AND table_schema = DATABASE()
AND column_name = 'Deinterlacing'
) > 0,
"SELECT 'Column Deinterlacing exists in Monitors'",
"ALTER TABLE `Monitors` ADD `Deinterlacing` INT UNSIGNED NOT NULL DEFAULT '0' AFTER `Orientation`"
));
PREPARE stmt FROM @s;
EXECUTE stmt;