liukun4515 commented on issue #3268:
URL:
https://github.com/apache/arrow-datafusion/issues/3268#issuecomment-1229178185
> ~Another option would be to add `Operatror::IsTrue` instead of a new
`Expr`~
>
> Never mind, `IS TRUE` is a unary expression, not binary.
Hi @andygrove Do we need the other unary expression for `IS_TRUE,
IS_FALSE...` ？
I go through preview pr for adding the sql syntax for above expr like that
which convert the `IS_TRUE` to the binary expr
```
SQLExpr::IsNotTrue(expr) => Ok(Expr::BinaryExpr {
left: Box::new(self.sql_expr_to_logical_expr(*expr, schema,
ctes)?),
op: Operator::IsDistinctFrom,
right: Box::new(lit(true)),
}),
```
I am not sure if it is a good way.
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