Fix for issue #3327 - may not solve issue with mariaDB but works for MySQL.

packages/builder/src/components/backend/DataTable/modals/CreateEditColumn.svelte

@@ -38,6 +38,7 @@
   const LINK_TYPE = FIELDS.LINK.type
   const STRING_TYPE = FIELDS.STRING.type
   const NUMBER_TYPE = FIELDS.NUMBER.type
+  const DATE_TYPE = FIELDS.DATETIME.type
 
   const dispatch = createEventDispatcher()
   const PROHIBITED_COLUMN_NAMES = ["type", "_id", "_rev", "tableId"]
@@ -256,6 +257,9 @@
     ) {
       fieldToCheck.constraints.numericality = {}
     }
+    if (fieldToCheck.type === DATE_TYPE && !fieldToCheck.constraints.datetime) {
+      fieldToCheck.constraints.datetime = {}
+    }
   }
 
   function checkErrors(fieldInfo) {

packages/server/src/integrations/mysql.ts

@@ -134,7 +134,7 @@ module MySQLModule {
         false
       )
       const tableNames = tablesResp.map(
-        (obj: any) => obj[`Tables_in_${database.toLowerCase()}`]
+        (obj: any) => obj[`Tables_in_${database}`] || obj[`Tables_in_${database.toLowerCase()}`]
       )
       for (let tableName of tableNames) {
         const primaryKeys = []