magic-removal: Removed introspection table_exists() functions -- they weren't being used, and you can just use get_table_list()

git-svn-id: http://code.djangoproject.com/svn/django/branches/magic-removal@2465 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/db/backends/ado_mssql/introspection.py

@@ -10,7 +10,4 @@ def get_relations(cursor, table_name):
 def get_indexes(cursor, table_name):
     raise NotImplementedError
 
-def table_exists(cursor, table_name):
-    raise NotImplementedError
-
 DATA_TYPES_REVERSE = {}

django/db/backends/dummy/introspection.py

@@ -4,6 +4,5 @@ get_table_list = complain
 get_table_description = complain
 get_relations = complain
 get_indexes = complain
-table_exists = complain
 
 DATA_TYPES_REVERSE = {}

django/db/backends/mysql/introspection.py

@@ -27,17 +27,7 @@ def get_indexes(cursor, table_name):
     for row in cursor.fetchall():
         indexes[row[4]] = {'primary_key': (row[2] == 'PRIMARY'), 'unique': not bool(row[1])}
     return indexes
-    
-def table_exists(cursor, table_name):
-    """Returns True if the given table exists."""
-    try:
-        cursor.execute("SELECT 1 FROM %s LIMIT 1" % quote_name(table_name))
-    except:
-        transaction.rollback_unless_managed()
-        return False
-    else:
-        return True
-        
+
 DATA_TYPES_REVERSE = {
     FIELD_TYPE.BLOB: 'TextField',
     FIELD_TYPE.CHAR: 'CharField',

django/db/backends/postgresql/introspection.py

@@ -67,16 +67,6 @@ def get_indexes(cursor, table_name):
         col_name = desc[int(row[0])-1][0]
         indexes[col_name] = {'primary_key': row[2], 'unique': row[1]}
     return indexes
-    
-def table_exists(cursor, table_name):
-    """Returns True if the given table exists."""
-    try:
-        cursor.execute("SELECT 1 FROM %s LIMIT 1" % quote_name(table_name))
-    except:
-        transaction.rollback_unless_managed()
-        return False
-    else:
-        return True
 
 # Maps type codes to Django Field types.
 DATA_TYPES_REVERSE = {

django/db/backends/sqlite3/introspection.py

@@ -15,16 +15,6 @@ def get_relations(cursor, table_name):
 def get_indexes(cursor, table_name):
     raise NotImplementedError
 
-def table_exists(cursor, table_name):
-    """Returns True if the given table exists."""
-    try:
-        cursor.execute("SELECT 1 FROM %s LIMIT 1" % quote_name(table_name))
-    except:
-        transaction.rollback_unless_managed()
-        return False
-    else:
-        return True
-
 # Maps SQL types to Django Field types. Some of the SQL types have multiple
 # entries here because SQLite allows for anything and doesn't normalize the
 # field type; it uses whatever was given.