alias round_digit to round

[kwannoel]

To be compatible with pg. https://www.postgresql.org/docs/current/functions-math.html

[xiangjinwu]

Could you elaborate? round_digit is the internal name and round is the user-facing SQL name.

risingwave/src/frontend/src/binder/expr/function/builtin_scalar.rs

Lines 152 to 158 in d00e2eb

	(
	"round",
	dispatch_by_len(vec![
	(2, raw_call(ExprType::RoundDigit)),
	(1, raw_call(ExprType::Round)),
	]),
	),

[kwannoel]

Nevermind, seems like it's an issue on my part.

dev=> create table t(p_col double, grp_col int);
CREATE_TABLE
dev=> select round(sum(p_col), 2) from t;
ERROR:  Failed to run the query

Caused by these errors (recent errors listed first):
  1: Failed to bind expression: round(sum(p_col), 2)
  2: function round_digit(double precision, integer) does not exist

dev=> select round(sum(p_col)::numeric, 2) from t;
 round 
-------
      
(1 row)