inspectdb is halfway there...

git-svn-id: http://code.djangoproject.com/svn/django/branches/boulder-oracle-sprint@4004 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/db/backends/oracle/introspection.py

@@ -1,3 +1,4 @@
+from django.db.backends.oracle.base import quote_name
 import re
 
 foreign_key_re = re.compile(r"\sCONSTRAINT `[^`]*` FOREIGN KEY \(`([^`]*)`\) REFERENCES `([^`]*)` \(`([^`]*)`\)")
@@ -8,8 +9,10 @@ def get_table_list(cursor):
     return [row[0].upper() for row in cursor]
 
 def get_table_description(cursor, table_name):
-    return table_name
-
+    "Returns a description of the table, with the DB-API cursor.description interface."
+    cursor.execute("SELECT * FROM %s WHERE ROWNUM < 2" % quote_name(table_name))
+    return cursor.description
+  
 def _name_to_index(cursor, table_name):
     """
     Returns a dictionary of {field_name: field_index} for the given table.
@@ -31,7 +34,39 @@ def get_indexes(cursor, table_name):
         {'primary_key': boolean representing whether it's the primary key,
          'unique': boolean representing whether it's a unique index}
     """
-    raise NotImplementedError
+    # This query retrieves each index on the given table, including the
+    # first associated field name
+    # "We were in the nick of time; you were in great peril!"
+    sql = """
+WITH primarycols AS (
+ SELECT user_cons_columns.table_name, user_cons_columns.column_name, 1 AS PRIMARYCOL
+ FROM   user_cons_columns, user_constraints
+ WHERE  user_cons_columns.constraint_name = user_constraints.constraint_name AND
+        user_constraints.constraint_type = 'P' AND
+        user_cons_columns.table_name = %s),
+ uniquecols AS (
+ SELECT user_ind_columns.table_name, user_ind_columns.column_name, 1 AS UNIQUECOL
+ FROM   user_indexes, user_ind_columns
+ WHERE  uniqueness = 'UNIQUE' AND
+        user_indexes.index_name = user_ind_columns.index_name AND
+        user_ind_columns.table_name = %s)
+SELECT allcols.column_name, primarycols.primarycol, uniquecols.UNIQUECOL
+FROM   (SELECT column_name FROM primarycols UNION SELECT column_name FROM
+uniquecols) allcols,
+      primarycols, uniquecols
+WHERE  allcols.column_name = primarycols.column_name (+) AND
+      allcols.column_name = uniquecols.column_name (+)
+    """
+    cursor.execute(sql, [table_name, table_name])
+    indexes = {}
+    for row in cursor.fetchall():
+        # row[1] (idx.indkey) is stored in the DB as an array. It comes out as
+        # a string of space-separated integers. This designates the field
+        # indexes (1-based) of the fields that have indexes on the table.
+        # Here, we skip any indexes across multiple fields.
+        indexes[row[0]] = {'primary_key': row[1], 'unique': row[2]}
+    return indexes
+    
 
 # Maps type codes to Django Field types.
 DATA_TYPES_REVERSE = {