릴리스: v1.4.15 db 초기화 안정화

backend/src/db.js

@@ -241,12 +241,28 @@ async function query(sql, params = []) {
 }
 
 async function tableExists(name) {
-  const rows = await query('SHOW TABLES LIKE ?', [name])
+  const rows = await query(
+    `
+      SELECT TABLE_NAME
+      FROM information_schema.TABLES
+      WHERE TABLE_SCHEMA = ? AND TABLE_NAME = ?
+      LIMIT 1
+    `,
+    [DB_NAME, name]
+  )
   return rows.length > 0
 }
 
 async function columnExists(tableName, columnName) {
-  const rows = await query(`SHOW COLUMNS FROM \`${tableName}\` LIKE ?`, [columnName])
+  const rows = await query(
+    `
+      SELECT COLUMN_NAME
+      FROM information_schema.COLUMNS
+      WHERE TABLE_SCHEMA = ? AND TABLE_NAME = ? AND COLUMN_NAME = ?
+      LIMIT 1
+    `,
+    [DB_NAME, tableName, columnName]
+  )
   return rows.length > 0
 }
 
@@ -475,15 +491,15 @@ async function ensureSchema() {
     if (!templateRequestTypeColumns.length) {
       await query("ALTER TABLE template_requests ADD COLUMN request_type VARCHAR(20) NOT NULL DEFAULT 'create' AFTER id")
     }
-    const templateRequestSourceGameColumns = await query("SHOW COLUMNS FROM template_requests LIKE 'source_topic_id'")
-    if (!templateRequestSourceGameColumns.length) {
+    const hasSourceTopicId = await columnExists('template_requests', 'source_topic_id')
+    if (!hasSourceTopicId) {
       await query("ALTER TABLE template_requests ADD COLUMN source_topic_id VARCHAR(120) NOT NULL DEFAULT 'freeform' AFTER source_tierlist_id")
       if (await columnExists('template_requests', 'source_game_id')) {
         await query('UPDATE template_requests SET source_topic_id = source_game_id WHERE source_topic_id = ?', [FREEFORM_TOPIC_ID])
       }
     }
-    const templateRequestTargetGameColumns = await query("SHOW COLUMNS FROM template_requests LIKE 'target_topic_id'")
-    if (!templateRequestTargetGameColumns.length) {
+    const hasTargetTopicId = await columnExists('template_requests', 'target_topic_id')
+    if (!hasTargetTopicId) {
       await query("ALTER TABLE template_requests ADD COLUMN target_topic_id VARCHAR(120) NOT NULL DEFAULT '' AFTER source_topic_id")
       if (await columnExists('template_requests', 'target_game_id')) {
         await query("UPDATE template_requests SET target_topic_id = target_game_id WHERE target_topic_id = ''")