Fix component exesql bug (#2042)

### What problem does this PR solve?

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

---------

Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>

agent/canvas.py

@@ -274,7 +274,7 @@ class Canvas(ABC):
     def get_embedding_model(self):
         return self._embed_id
 
-    def _find_loop(self, max_loops=2):
+    def _find_loop(self, max_loops=6):
         path = self.path[-1][::-1]
         if len(path) < 2: return False
 

agent/component/exesql.py

@@ -14,7 +14,7 @@
 #  limitations under the License.
 #
 from abc import ABC
-
+import re
 import pandas as pd
 from peewee import MySQLDatabase, PostgresqlDatabase
 from agent.component.base import ComponentBase, ComponentParamBase
@@ -59,6 +59,9 @@ class ExeSQL(ComponentBase, ABC):
 
         ans = self.get_input()
         ans = "".join(ans["content"]) if "content" in ans else ""
+        ans = re.sub(r'^.*?SELECT ', 'SELECT ', repr(ans), flags=re.IGNORECASE)
+        ans = re.sub(r';.*?SELECT ', '; SELECT ', ans, flags=re.IGNORECASE)
+        ans = re.sub(r';[^;]*$', r';', ans)
         if not ans:
             return ExeSQL.be_output("SQL statement not found!")
 
@@ -75,7 +78,7 @@ class ExeSQL(ComponentBase, ABC):
             sql_res = [{"content": rec + "\n"} for rec in [str(i) for i in query.fetchall()]]
             db.close()
         except Exception as e:
-            return ExeSQL.be_output("**Error**:" + str(e))
+            return ExeSQL.be_output("**Error**:" + str(e) + "\nError SQL Statement:" + ans)
 
         if not sql_res:
             return ExeSQL.be_output("No record in the database!")

api/apps/canvas_app.py

@@ -175,6 +175,6 @@ def test_db_connect():
                                     password=req["password"])
         db.connect()
         db.close()
-        return get_json_result(retmsg="Database Connection Successful!")
+        return get_json_result(data="Database Connection Successful!")
     except Exception as e:
         return server_error_response(e)