`INTERVAL` + timestamp and `INTERVAL` + date not supported (but timestamp + `INTERVAL` and date + `INTERVAL` is)

[jackwener]

Describe the bug

current df don't support interval in left.

select interval '1 month' + '2023-05-01'::date;

This feature is not implemented: Unsupported interval argument. Expected string literal, got: BinaryOp { left: Value(SingleQuotedString("1 month")), op: Plus, right: Cast { expr: Value(SingleQuotedString("2023-05-01")), data_type: Date } }

To Reproduce

No response

Expected behavior

No response

Additional context

No response

[jackwener]

It's wrong in src/expr/mod.rs:140 sql_interval_to_expr().

SQLExpr is

"Interval { value: BinaryOp { left: Value(SingleQuotedString("1 month")), op: Plus, right: Cast { expr: Value(SingleQuotedString("2023-05-01")), data_type: Date } }, leading_field: None, leading_precision: None, last_field: None, fractional_seconds_precision: None }"

I think it is a bug in Parser. Interval shouldn't include BinaryOp.

[alamb]

Added to #5753

[alamb]

I agree this is a parser problem. INTERVAL + timestamp and INTERVAL+date do work if the ::interval cast syntax is used rather than the interval. I will open another bug explaining this

❯ select '1 month'::interval + '2012-01-01'::date;
+--------------------------------------+
| Utf8("1 month") + Utf8("2012-01-01") |
+--------------------------------------+
| 2012-02-01                           |
+--------------------------------------+
❯ select '1 month'::interval + '2012-01-01'::timestamp;
+--------------------------------------+
| Utf8("1 month") + Utf8("2012-01-01") |
+--------------------------------------+
| 2012-02-01T00:00:00                  |
+--------------------------------------+

❯ select '2012-01-01'::date + interval '1 month';
+----------------------------------------------------------------------------+
| Utf8("2012-01-01") + IntervalMonthDayNano("79228162514264337593543950336") |
+----------------------------------------------------------------------------+
| 2012-02-01                                                                 |
+----------------------------------------------------------------------------+

❯ select interval '1 month' + '2012-01-01'::date;
This feature is not implemented: Unsupported interval argument. Expected string literal, got: BinaryOp { left: Value(SingleQuotedString("1 month")), op: Plus, right: Cast { expr: Value(SingleQuotedString("2012-01-01")), data_type: Date } }

[alamb]

#6205