Fix bugs deleting tables when is necessary

dags/components/Databases/Mysql.py

@@ -121,7 +121,7 @@ class Mysql:
             result = connection.execute(check_query)
             exists = bool(result.fetchone())
         except Exception as e:
-            logger.error(f"Error obteniendo existencia de tabla. {e}")
+            logger.info(f"No se encuentra la tabla {table_name} en la BD interna")
         finally:
             return exists
 
@@ -130,9 +130,10 @@ class Mysql:
         try:
             check_query = f"SELECT COUNT(*) FROM {table_name}"
             result = connection.execute(check_query)
+            result = result.fetchone()[0]
             if result > 0:
                 exists = True
         except Exception as e:
-            logger.error(f"Error obteniendo counts de tabla. {e}")
+            logger.info(f"No se encuentra la tabla {table_name} en la BD interna")
         finally:
             return exists

dags/components/Databases/Oracle.py

@@ -129,7 +129,7 @@ class Oracle:
             result = connection.execute(check_query)
             exists = bool(result.fetchone())
         except Exception as e:
-            logger.error(f"Error obteniendo existencia de tabla. {e}")
+            logger.info(f"No se encuentra la tabla {table_name} en la BD interna")
         finally:
             return exists
 
@@ -138,9 +138,10 @@ class Oracle:
         try:
             check_query = f"SELECT COUNT(*) FROM {table_name.upper()}"
             result = connection.execute(check_query)
+            result = result.fetchone()[0]
             if result > 0:
                 exists = True
         except Exception as e:
-            logger.error(f"Error obteniendo counts de tabla. {e}")
+            logger.info(f"No se encuentra la tabla {table_name} en la BD interna.")
         finally:
-            return exists
\ No newline at end of file
+            return exists

dags/components/Databases/Postgres.py

@@ -122,7 +122,7 @@ class Postgres:
             result = connection.execute(check_query)
             exists = bool(result.fetchone())
         except Exception as e:
-            logger.error(f"Error obteniendo existencia de tabla. {e}")
+            logger.info(f"No se encuentra la tabla {table_name} en la BD interna")
         finally:
             return exists
 
@@ -131,9 +131,10 @@ class Postgres:
         try:
             check_query = f"SELECT COUNT(*) FROM {table_name}"
             result = connection.execute(check_query)
+            result = result.fetchone()[0]
             if result > 0:
                 exists = True
         except Exception as e:
-            logger.error(f"Error obteniendo counts de tabla. {e}")
+            logger.info(f"No se encuentra la tabla {table_name} en la BD interna")
         finally:
-            return exists
\ No newline at end of file
+            return exists

dags/components/Extractor.py

@@ -90,6 +90,8 @@ def on_success_extractor(context) -> None:
     ti = context["ti"]
     task_name = f"{ti.task_id}_{ti.map_index}"
     selects = Variable.get('SELECTS', default_var=[], deserialize_json=True)
+    if len(selects) == 0:
+        raise AirflowSkipException(f"No se encontraron operaciones de extraccion")
     command = selects[ti.map_index]
     tablename = select_multiple(command[1])["tablename"]
     status = ProcessStatusEnum.SUCCESS.value
@@ -142,6 +144,7 @@ def extract_from_source(command, source_conn, intern_conn, chunksize: int, timez
         result = bool(intern_conn.check_table(tablename, connection))
         resultado = intern_conn.verify_table(tablename, connection)
         if not result or not resultado:
+            _ = delete_table(tablename, intern_conn)
             create = intern_conn.create_table(model)
             if create:
                 logger.info(f"Creado correctamente la tabla {tablename}. Creado?: {create}")