add CURRENTDATE support for Databricks SQL Push down

Author: KSDaemon

packages/cubejs-databricks-jdbc-driver/src/DatabricksQuery.ts

@@ -186,6 +186,7 @@ export class DatabricksQuery extends BaseQuery {
 
   public sqlTemplates() {
     const templates = super.sqlTemplates();
+    templates.functions.CURRENTDATE = 'CURRENT_DATE';
     templates.functions.DATETRUNC = 'DATE_TRUNC({{ args_concat }})';
     templates.functions.DATEPART = 'DATE_PART({{ args_concat }})';
     templates.functions.BTRIM = 'TRIM({% if args[1] is defined %}{{ args[1] }} FROM {% endif %}{{ args[0] }})';