langchain[patch]: Running SQLDatabaseChain adds prefix "SQLQuery:\n" (#…

…14058)

- **Issue:** #12077

---------

Co-authored-by: Abdul Kader Maliyakkal <maliyakk@amazon.com>

libs/experimental/langchain_experimental/sql/base.py

@@ -17,6 +17,7 @@
 from langchain_experimental.pydantic_v1 import Extra, Field, root_validator
 
 INTERMEDIATE_STEPS_KEY = "intermediate_steps"
+SQL_QUERY = "SQLQuery:"
 
 
 class SQLDatabaseChain(Chain):
@@ -110,7 +111,7 @@ def _call(
         run_manager: Optional[CallbackManagerForChainRun] = None,
     ) -> Dict[str, Any]:
         _run_manager = run_manager or CallbackManagerForChainRun.get_noop_manager()
-        input_text = f"{inputs[self.input_key]}\nSQLQuery:"
+        input_text = f"{inputs[self.input_key]}\n{SQL_QUERY}"
         _run_manager.on_text(input_text, verbose=self.verbose)
         # If not present, then defaults to None which is all tables.
         table_names_to_use = inputs.get("table_names_to_use")
@@ -140,6 +141,8 @@ def _call(
                     sql_cmd
                 )  # output: sql generation (no checker)
                 intermediate_steps.append({"sql_cmd": sql_cmd})  # input: sql exec
+                if SQL_QUERY in sql_cmd:
+                    sql_cmd = sql_cmd.split(SQL_QUERY)[1].strip()
                 result = self.database.run(sql_cmd)
                 intermediate_steps.append(str(result))  # output: sql exec
             else: