feat: add collation to maria db indexes query and analyser

plugins/dbgate-plugin-mysql/src/backend/sql/indexes.js

@@ -4,7 +4,11 @@ module.exports = `
         TABLE_NAME AS tableName,
         COLUMN_NAME AS columnName,
         INDEX_TYPE AS indexType,
-        NON_UNIQUE AS nonUnique
+        NON_UNIQUE AS nonUnique,
+        CASE COLLATION
+            WHEN 'D' THEN 1
+            ELSE 0
+        END AS isDescending
     FROM INFORMATION_SCHEMA.STATISTICS
     WHERE TABLE_SCHEMA = '#DATABASE#' AND TABLE_NAME =OBJECT_ID_CONDITION AND INDEX_NAME != 'PRIMARY'
     ORDER BY SEQ_IN_INDEX