diff --git a/etiquette/constants.py b/etiquette/constants.py
index 2f96e43..23168c6 100644
--- a/etiquette/constants.py
+++ b/etiquette/constants.py
@@ -204,6 +204,14 @@ def _extract_columns_from_table(create_table_statement):
     column_names = [c for c in column_names if c.lower() != 'foreign']
     return column_names
 
+def _extract_table_column_map(script):
+    columns = {}
+    table_statements = _extract_table_statements(script)
+    for table_statement in table_statements:
+        table_name = _extract_table_name(table_statement)
+        columns[table_name] = _extract_columns_from_table(table_statement)
+    return columns
+
 def _reverse_index(columns):
     '''
     Given an iterable, return a dictionary where the key is the item and the
@@ -213,12 +221,7 @@ def _reverse_index(columns):
     '''
     return {column: index for (index, column) in enumerate(columns)}
 
-SQL_COLUMNS = {}
-for table_statement in _extract_table_statements(DB_INIT):
-    table_name = _extract_table_name(table_statement)
-    columns = _extract_columns_from_table(table_statement)
-    SQL_COLUMNS[table_name] = columns
-
+SQL_COLUMNS = _extract_table_column_map(DB_INIT)
 SQL_INDEX = {table: _reverse_index(columns) for (table, columns) in SQL_COLUMNS.items()}
 
 ALLOWED_ORDERBY_COLUMNS = [