(TOK_QUERY (TOK_FROM (TOK_TABREF src1)) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (+ 4 TOK_NULL)) (TOK_SELEXPR (- (. (TOK_TABLE_OR_COL src1) key) TOK_NULL)) (TOK_SELEXPR (+ TOK_NULL TOK_NULL))))) null