fix: fallback agent batch execution errors (#2113)

crates/dbx-core/src/query.rs

@@ -1861,7 +1861,7 @@ pub async fn execute_statements(
         match result {
             Ok(result) => return Ok(db::QueryResult { execution_time_ms: start.elapsed().as_millis(), ..result }),
             Err(err) => {
-                if err.contains("Unknown method: execute_batch") {
+                if is_agent_execute_batch_unsupported(&err) {
                     log::warn!(
                         "Agent does not support execute_batch; falling back to statement-by-statement execution"
                     );
@@ -1928,6 +1928,11 @@ pub async fn execute_statements(
     })
 }
 
+fn is_agent_execute_batch_unsupported(error: &str) -> bool {
+    let lower = error.to_lowercase();
+    lower.contains("execute_batch") && (lower.contains("unknown method") || lower.contains("method not found"))
+}
+
 /// Execute multiple SQL statements within a single transaction.
 /// For pooled drivers (Postgres/MySQL), uses the driver transaction API.
 /// For SQLite and already-single-connection drivers (ClickHouse/SqlServer/Agent),
@@ -2404,6 +2409,19 @@ mod tests {
         }
     }
 
+    #[test]
+    fn agent_execute_batch_unsupported_detects_case_insensitive_method_errors() {
+        assert!(is_agent_execute_batch_unsupported("Agent RPC error (-1): unknown method: execute_batch"));
+        assert!(is_agent_execute_batch_unsupported("Agent RPC error (-1): Unknown method: execute_batch"));
+        assert!(is_agent_execute_batch_unsupported("Agent RPC error (-32601): Method not found: execute_batch"));
+    }
+
+    #[test]
+    fn agent_execute_batch_unsupported_ignores_unrelated_errors() {
+        assert!(!is_agent_execute_batch_unsupported("ORA-00955: name is already used by an existing object"));
+        assert!(!is_agent_execute_batch_unsupported("Agent RPC error (-1): unknown method: execute_query"));
+    }
+
     #[tokio::test]
     async fn wait_for_query_returns_cancelled_when_token_is_cancelled() {
         let token = CancellationToken::new();