1 files changed, 18 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/sqlite_adapter.rb b/activerecord/lib/active_record/connection_adapters/sqlite_adapter.rb
index ed5006dcec..d2785b234a 100644
--- a/activerecord/lib/active_record/connection_adapters/sqlite_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/sqlite_adapter.rb
@@ -58,10 +58,12 @@ module ActiveRecord
         'SQLite'
       end
 
+      # Returns true if SQLite version is '2.0.0' or greater, false otherwise.
       def supports_ddl_transactions?
         sqlite_version >= '2.0.0'
       end
 
+      # Returns true if SQLite version is '3.6.8' or greater, false otherwise.
       def supports_savepoints?
         sqlite_version >= '3.6.8'
       end
@@ -72,7 +74,7 @@ module ActiveRecord
         true
       end
 
-      # Returns true.
+      # Returns true, since this connection adapter supports migrations.
       def supports_migrations? #:nodoc:
         true
       end
@@ -86,6 +88,7 @@ module ActiveRecord
         true
       end
 
+      # Returns true if SQLite version is '3.1.6' or greater, false otherwise.
       def supports_add_column?
         sqlite_version >= '3.1.6'
       end
@@ -103,10 +106,12 @@ module ActiveRecord
         @statements.clear
       end
 
+      # Returns true if SQLite version is '3.2.6' or greater, false otherwise.
       def supports_count_distinct? #:nodoc:
         sqlite_version >= '3.2.6'
       end
 
+      # Returns true if SQLite version is '3.1.0' or greater, false otherwise.
       def supports_autoincrement? #:nodoc:
         sqlite_version >= '3.1.0'
       end
@@ -178,6 +183,12 @@ module ActiveRecord
         end
       end
 
+      def exec_delete(sql, name = 'SQL', binds = [])
+        exec_query(sql, name, binds)
+        @connection.changes
+      end
+      alias :exec_update :exec_delete
+
       def last_inserted_id(result)
         @connection.last_insert_row_id
       end
@@ -244,6 +255,7 @@ module ActiveRecord
         end
       end
 
+      # Returns an array of +SQLiteColumn+ objects for the table specified by +table_name+.
       def columns(table_name, name = nil) #:nodoc:
         table_structure(table_name).map do |field|
           case field["dflt_value"]
@@ -259,6 +271,7 @@ module ActiveRecord
         end
       end
 
+      # Returns an array of indexes for the given table.
       def indexes(table_name, name = nil) #:nodoc:
         exec_query("PRAGMA index_list(#{quote_table_name(table_name)})", name).map do |row|
           IndexDefinition.new(
@@ -282,6 +295,10 @@ module ActiveRecord
         exec_query "DROP INDEX #{quote_column_name(index_name)}"
       end
 
+      # Renames a table.
+      #
+      # Example:
+      #   rename_table('octopuses', 'octopi')
       def rename_table(name, new_name)
         exec_query "ALTER TABLE #{quote_table_name(name)} RENAME TO #{quote_table_name(new_name)}"
       end