Function case

datafusion/expr/src/expr_fn.rs:380–382

Create a CASE WHEN statement with literal WHEN expressions for comparison to the base expression.

(expr: Expr)

/// Create a CASE WHEN statement with literal WHEN expressions for comparison to the base expression.
pub fn case(expr: Expr) -> CaseBuilder {
    CaseBuilder::new(Some(Box::new(expr)), vec![], vec![], None)
}

/// Create a CASE WHEN statement with boolean WHEN expressions and no base expression.
pub fn when(when: Expr, then: Expr) -> CaseBuilder {