title: pandas.read_sql_table producing table not found error
body: <p>I'm trying to access my Oracle 11g(r2) Express Edition database via python.  I specifically want to create a pandas DataFrame from one of the tables, HISTORY_FULLNESS.  However, when I try to use the pandas.read_sql_table() function, it gives me a Table Not Found error.  In the code below I duplicate the query that the engine is executing, and it clearly has HISTORY_FULLNESS in the results.  Any clue what I'm doing wrong?</p>
  
  <p>I have the following code (*** added to obfuscate ip and password):</p>
  
  <pre><code>### Imports ###
  import pandas as pd
  import numpy as np
  import cx_Oracle
  import pandas.io.sql as psql
  import sqlalchemy
  
  # Open connection to Oracle Database
  OpsDBengine = sqlalchemy.create_engine('oracle://OPSDBADMIN:***@***.***.***.***:1521/', echo=True)
  
  connection = OpsDBengine.connect()
  result = connection.execute("SELECT table_name FROM all_tables WHERE nvl(tablespace_name, 'no tablespace') NOT IN ('SYSTEM', 'SYSAUX') AND OWNER = 'OPSDBADMIN' AND IOT_NAME IS NULL")
  for row in result:
      print "tablename: ", row['table_name']
  
  
  testDF = pd.read_sql_table(table_name = 'HISTORY_FULLNESS', con=OpsDBengine, schema='OPSDBADMIN', index_col = 'FULLNESSRECORDID')
  </code></pre>
  
  <p>The output is as follows:</p>
  
  <pre><code>2015-02-19 15:23:58,714 INFO sqlalchemy.engine.base.Engine SELECT USER FROM DUAL
  INFO:sqlalchemy.engine.base.Engine:SELECT USER FROM DUAL
  2015-02-19 15:23:58,716 INFO sqlalchemy.engine.base.Engine {}
  INFO:sqlalchemy.engine.base.Engine:{}
  2015-02-19 15:23:58,740 INFO sqlalchemy.engine.base.Engine SELECT CAST('test plain returns' AS VARCHAR(60 CHAR)) AS anon_1 FROM DUAL
  INFO:sqlalchemy.engine.base.Engine:SELECT CAST('test plain returns' AS VARCHAR(60 CHAR)) AS anon_1 FROM DUAL
  2015-02-19 15:23:58,740 INFO sqlalchemy.engine.base.Engine {}
  INFO:sqlalchemy.engine.base.Engine:{}
  2015-02-19 15:23:58,746 INFO sqlalchemy.engine.base.Engine SELECT CAST('test unicode returns' AS NVARCHAR2(60)) AS anon_1 FROM DUAL
  INFO:sqlalchemy.engine.base.Engine:SELECT CAST('test unicode returns' AS NVARCHAR2(60)) AS anon_1 FROM DUAL
  2015-02-19 15:23:58,749 INFO sqlalchemy.engine.base.Engine {}
  INFO:sqlalchemy.engine.base.Engine:{}
  2015-02-19 15:23:58,766 INFO sqlalchemy.engine.base.Engine SELECT table_name FROM all_tables WHERE nvl(tablespace_name, 'no tablespace') NOT IN ('SYSTEM', 'SYSAUX') AND OWNER = 'OPSDBADMIN' AND IOT_NAME IS NULL
  INFO:sqlalchemy.engine.base.Engine:SELECT table_name FROM all_tables WHERE nvl(tablespace_name, 'no tablespace') NOT IN ('SYSTEM', 'SYSAUX') AND OWNER = 'OPSDBADMIN' AND IOT_NAME IS NULL
  2015-02-19 15:23:58,766 INFO sqlalchemy.engine.base.Engine {}
  INFO:sqlalchemy.engine.base.Engine:{}
  tablename:  SAFETY_CASEFILE
  tablename:  HTMLDB_PLAN_TABLE
  tablename:  HISTORY_FULLNESS
  tablename:  HR_EMPLOYEE_PHOTOS
  tablename:  HR_MANAGER_DEPARTMENT_GROUPS
  tablename:  DB_DEPARTMENT_GROUPS
  tablename:  HR_MANAGER_DEPT_ASSIGNMENTS
  tablename:  HR_MANAGER_SHIFT_ASSIGNMENTS
  tablename:  HR_EMPLOYEE_ROLE
  2015-02-19 15:23:58,825 INFO sqlalchemy.engine.base.Engine SELECT table_name FROM all_tables WHERE nvl(tablespace_name, 'no tablespace') NOT IN ('SYSTEM', 'SYSAUX') AND OWNER = :owner AND IOT_NAME IS NULL
  INFO:sqlalchemy.engine.base.Engine:SELECT table_name FROM all_tables WHERE nvl(tablespace_name, 'no tablespace') NOT IN ('SYSTEM', 'SYSAUX') AND OWNER = :owner AND IOT_NAME IS NULL
  2015-02-19 15:23:58,825 INFO sqlalchemy.engine.base.Engine {'owner': u'OPSDBADMIN'}
  INFO:sqlalchemy.engine.base.Engine:{'owner': u'OPSDBADMIN'}
  ---------------------------------------------------------------------------
  ValueError                                Traceback (most recent call last)
  &lt;ipython-input-9-8f6c6d72ed22&gt; in &lt;module&gt;()
       15 
       16 
  ---&gt; 17 testDF = pd.read_sql_table(table_name = 'HISTORY_FULLNESS', con=OpsDBengine, schema='OPSDBADMIN', index_col = 'FULLNESSRECORDID')
  
  C:\Anaconda\lib\site-packages\pandas\io\sql.pyc in read_sql_table(table_name, con, schema, index_col, coerce_float, parse_dates, columns, chunksize)
      334         meta.reflect(only=[table_name])
      335     except sqlalchemy.exc.InvalidRequestError:
  --&gt; 336         raise ValueError("Table %s not found" % table_name)
      337 
      338     pandas_sql = SQLDatabase(con, meta=meta)
  
  ValueError: Table HISTORY_FULLNESS not found
  </code></pre>