Split DROP/CREATE procedure over two sqlalchemy calls

When running with two queries at the same time, if
one raises a warning and the other doesn't PyMySQL
raises a TypeError.

Author: Thomas Grainger

pandas/io/tests/test_sql.py

@@ -1481,8 +1481,7 @@ def test_read_procedure(self):
         df = DataFrame({'a': [1, 2, 3], 'b':[0.1, 0.2, 0.3]})
         df.to_sql('test_procedure', self.conn, index=False)
 
-        proc = """DROP PROCEDURE IF EXISTS get_testdb;
-
+        proc = """
         CREATE PROCEDURE get_testdb ()
 
         BEGIN
@@ -1492,6 +1491,7 @@ def test_read_procedure(self):
         connection = self.conn.connect()
         trans = connection.begin()
         try:
+            connection.execute("DROP PROCEDURE IF EXISTS get_testdb")
             r1 = connection.execute(proc)
             trans.commit()
         except: