Revert "Default to NullPool for Linux ODBC drivers"

This reverts commit 2905589.

Author: remi-td

sqlalchemy_teradata/dialect.py

@@ -15,7 +15,6 @@
 import sqlalchemy.types as sqltypes
 import sqlalchemy_teradata.types as tdtypes
 from itertools import groupby
-from teradata.tdodbc import osType
 
 # ischema names is used for reflecting columns (see get_columns in the dialect)
 ischema_names = {
@@ -52,12 +51,7 @@ class TeradataDialect(default.DefaultDialect):
     name = 'teradata'
     driver = 'teradata'
     default_paramstyle = 'qmark'
-    
-    #Connection pooling not supported by Linux ODBC driver
-    if osType=='Linux':
-        poolclass = pool.NullPool
-    else:
-        poolclass = pool.SingletonThreadPool
+    poolclass = pool.SingletonThreadPool
 
     statement_compiler = TeradataCompiler
     ddl_compiler = TeradataDDLCompiler