Add bindings to sqlite3_column_database|table|origin_name.

meta.go

@@ -147,6 +147,24 @@ func (c *Conn) Column(dbName, tableName, columnName string) (*Column, error) {
 		autoinc == 1, C.GoString(zCollSeq)}, nil
 }
 
+// The left-most column is column 0
+// (See http://www.sqlite.org/c3ref/column_database_name.html)
+func (s *Stmt) ColumnDatabaseName(index int) string {
+	return C.GoString(C.sqlite3_column_database_name(s.stmt, C.int(index)))
+}
+
+// The left-most column is column 0
+// (See http://www.sqlite.org/c3ref/column_database_name.html)
+func (s *Stmt) ColumnTableName(index int) string {
+	return C.GoString(C.sqlite3_column_table_name(s.stmt, C.int(index)))
+}
+
+// The left-most column is column 0
+// (See http://www.sqlite.org/c3ref/column_database_name.html)
+func (s *Stmt) ColumnOriginName(index int) string {
+	return C.GoString(C.sqlite3_column_origin_name(s.stmt, C.int(index)))
+}
+
 // See Conn.ForeignKeys
 type ForeignKey struct {
 	Table string

meta_test.go

@@ -111,3 +111,18 @@ func TestIndexes(t *testing.T) {
 	column := columns[0]
 	assertEquals(t, "Wrong column name: %q <> %q", "a_string", column.Name)
 }
+
+func TestColumnMetadata(t *testing.T) {
+	db := open(t)
+	defer db.Close()
+	s, err := db.Prepare("SELECT name AS table_name FROM sqlite_master")
+	check(err)
+	defer s.Finalize()
+
+	databaseName := s.ColumnDatabaseName(0)
+	assertEquals(t, "wrong database name: %q <> %q", "main", databaseName)
+	tableName := s.ColumnTableName(0)
+	assertEquals(t, "wrong table name: %q <> %q", "sqlite_master", tableName)
+	originName := s.ColumnOriginName(0)
+	assertEquals(t, "wrong origin name: %q <> %q", "name", originName)
+}