Function plan_cast

pub fn plan_cast(
    ecx: &ExprContext<'_>,
    ccx: CastContext,
    expr: HirScalarExpr,
    to: &SqlScalarType,
) -> Result<HirScalarExpr, PlanError>

Plans a cast between SqlScalarTypes, specifying which types of casts are permitted using CastContext.

Errors

If a cast between the ScalarExpr’s base type and the specified type is:

• Not possible, e.g. Bytes to Interval
• Not permitted, e.g. implicitly casting from Float64 to Float32.
• Not implemented yet