sync-docs-and-fixes

drizzle/0010_subject_id_switch.sql

@@ -0,0 +1,110 @@
+SET @has_subject_id := (
+  SELECT COUNT(*) FROM information_schema.COLUMNS
+  WHERE TABLE_SCHEMA = DATABASE()
+    AND TABLE_NAME = 'class_subject_teachers'
+    AND COLUMN_NAME = 'subject_id'
+);--> statement-breakpoint
+SET @sql := IF(@has_subject_id = 0, 'ALTER TABLE `class_subject_teachers` ADD COLUMN `subject_id` VARCHAR(128) NULL;', 'SELECT 1');--> statement-breakpoint
+PREPARE stmt FROM @sql;--> statement-breakpoint
+EXECUTE stmt;--> statement-breakpoint
+DEALLOCATE PREPARE stmt;--> statement-breakpoint
+
+INSERT INTO `subjects` (`id`, `name`, `code`)
+SELECT UUID(), '语文', 'CHINESE' FROM DUAL
+WHERE NOT EXISTS (SELECT 1 FROM `subjects` WHERE `name` = '语文' OR `code` = 'CHINESE')
+UNION ALL
+SELECT UUID(), '数学', 'MATH' FROM DUAL
+WHERE NOT EXISTS (SELECT 1 FROM `subjects` WHERE `name` = '数学' OR `code` = 'MATH')
+UNION ALL
+SELECT UUID(), '英语', 'ENG' FROM DUAL
+WHERE NOT EXISTS (SELECT 1 FROM `subjects` WHERE `name` = '英语' OR `code` = 'ENG')
+UNION ALL
+SELECT UUID(), '美术', 'ART' FROM DUAL
+WHERE NOT EXISTS (SELECT 1 FROM `subjects` WHERE `name` = '美术' OR `code` = 'ART')
+UNION ALL
+SELECT UUID(), '体育', 'PE' FROM DUAL
+WHERE NOT EXISTS (SELECT 1 FROM `subjects` WHERE `name` = '体育' OR `code` = 'PE')
+UNION ALL
+SELECT UUID(), '科学', 'SCI' FROM DUAL
+WHERE NOT EXISTS (SELECT 1 FROM `subjects` WHERE `name` = '科学' OR `code` = 'SCI')
+UNION ALL
+SELECT UUID(), '社会', 'SOC' FROM DUAL
+WHERE NOT EXISTS (SELECT 1 FROM `subjects` WHERE `name` = '社会' OR `code` = 'SOC')
+UNION ALL
+SELECT UUID(), '音乐', 'MUSIC' FROM DUAL
+WHERE NOT EXISTS (SELECT 1 FROM `subjects` WHERE `name` = '音乐' OR `code` = 'MUSIC');--> statement-breakpoint
+
+SET @has_subject_col := (
+  SELECT COUNT(*) FROM information_schema.COLUMNS
+  WHERE TABLE_SCHEMA = DATABASE()
+    AND TABLE_NAME = 'class_subject_teachers'
+    AND COLUMN_NAME = 'subject'
+);--> statement-breakpoint
+SET @sql := IF(@has_subject_col = 1, '
+  UPDATE `class_subject_teachers` cst
+  JOIN `subjects` s ON (
+    s.`name` = cst.`subject`
+    OR s.`code` = CASE cst.`subject`
+      WHEN ''语文'' THEN ''CHINESE''
+      WHEN ''数学'' THEN ''MATH''
+      WHEN ''英语'' THEN ''ENG''
+      WHEN ''美术'' THEN ''ART''
+      WHEN ''体育'' THEN ''PE''
+      WHEN ''科学'' THEN ''SCI''
+      WHEN ''社会'' THEN ''SOC''
+      WHEN ''音乐'' THEN ''MUSIC''
+      ELSE NULL
+    END
+  )
+  SET cst.`subject_id` = s.`id`
+  WHERE cst.`subject_id` IS NULL;
+', 'SELECT 1');--> statement-breakpoint
+PREPARE stmt FROM @sql;--> statement-breakpoint
+EXECUTE stmt;--> statement-breakpoint
+DEALLOCATE PREPARE stmt;--> statement-breakpoint
+
+SET @subject_id_nulls := (
+  SELECT COUNT(*) FROM `class_subject_teachers`
+  WHERE `subject_id` IS NULL
+);--> statement-breakpoint
+SET @sql := IF(@subject_id_nulls = 0, 'ALTER TABLE `class_subject_teachers` MODIFY COLUMN `subject_id` VARCHAR(128) NOT NULL;', 'SELECT 1');--> statement-breakpoint
+PREPARE stmt FROM @sql;--> statement-breakpoint
+EXECUTE stmt;--> statement-breakpoint
+DEALLOCATE PREPARE stmt;--> statement-breakpoint
+
+SET @sql := IF(@subject_id_nulls = 0, 'ALTER TABLE `class_subject_teachers` DROP PRIMARY KEY;', 'SELECT 1');--> statement-breakpoint
+PREPARE stmt FROM @sql;--> statement-breakpoint
+EXECUTE stmt;--> statement-breakpoint
+DEALLOCATE PREPARE stmt;--> statement-breakpoint
+SET @sql := IF(@subject_id_nulls = 0, 'ALTER TABLE `class_subject_teachers` ADD PRIMARY KEY (`class_id`, `subject_id`);', 'SELECT 1');--> statement-breakpoint
+PREPARE stmt FROM @sql;--> statement-breakpoint
+EXECUTE stmt;--> statement-breakpoint
+DEALLOCATE PREPARE stmt;--> statement-breakpoint
+
+SET @sql := IF(@subject_id_nulls = 0 AND @has_subject_col = 1, 'ALTER TABLE `class_subject_teachers` DROP COLUMN `subject`;', 'SELECT 1');--> statement-breakpoint
+PREPARE stmt FROM @sql;--> statement-breakpoint
+EXECUTE stmt;--> statement-breakpoint
+DEALLOCATE PREPARE stmt;--> statement-breakpoint
+
+SET @has_subject_id_idx := (
+  SELECT COUNT(*) FROM information_schema.STATISTICS
+  WHERE TABLE_SCHEMA = DATABASE()
+    AND TABLE_NAME = 'class_subject_teachers'
+    AND INDEX_NAME = 'class_subject_teachers_subject_id_idx'
+);--> statement-breakpoint
+SET @sql := IF(@subject_id_nulls = 0 AND @has_subject_id_idx = 0, 'CREATE INDEX `class_subject_teachers_subject_id_idx` ON `class_subject_teachers` (`subject_id`);', 'SELECT 1');--> statement-breakpoint
+PREPARE stmt FROM @sql;--> statement-breakpoint
+EXECUTE stmt;--> statement-breakpoint
+DEALLOCATE PREPARE stmt;--> statement-breakpoint
+
+SET @has_subject_fk := (
+  SELECT COUNT(*) FROM information_schema.TABLE_CONSTRAINTS
+  WHERE TABLE_SCHEMA = DATABASE()
+    AND TABLE_NAME = 'class_subject_teachers'
+    AND CONSTRAINT_NAME = 'cst_s_fk'
+    AND CONSTRAINT_TYPE = 'FOREIGN KEY'
+);--> statement-breakpoint
+SET @sql := IF(@subject_id_nulls = 0 AND @has_subject_fk = 0, 'ALTER TABLE `class_subject_teachers` ADD CONSTRAINT `cst_s_fk` FOREIGN KEY (`subject_id`) REFERENCES `subjects`(`id`) ON DELETE CASCADE;', 'SELECT 1');--> statement-breakpoint
+PREPARE stmt FROM @sql;--> statement-breakpoint
+EXECUTE stmt;--> statement-breakpoint
+DEALLOCATE PREPARE stmt;