BUG: fix checking of table name in read_sql (GH7826)

Author: jorisvandenbossche

doc/source/v0.15.0.txt

@@ -400,7 +400,7 @@ For full docs, see the :ref:`Categorical introduction <categorical>` and the
 
 
 
-
+- Bug in checking of table name in ``read_sql`` in certain cases (:issue:`7826`).
 
 
 

pandas/io/sql.py

@@ -420,7 +420,12 @@ def read_sql(sql, con, index_col=None, coerce_float=True, params=None,
             sql, index_col=index_col, params=params,
             coerce_float=coerce_float, parse_dates=parse_dates)
 
-    if pandas_sql.has_table(sql):
+    try:
+        _is_table_name = pandas_sql.has_table(sql)
+    except:
+        _is_table_name = False
+
+    if _is_table_name:
         pandas_sql.meta.reflect(only=[sql])
         return pandas_sql.read_table(
             sql, index_col=index_col, coerce_float=coerce_float,