Function normalize_col

datafusion/expr/src/expr_rewriter/mod.rs:69–81

Recursively call `LogicalPlanBuilder::normalize` on all [`Column`] expressions in the `expr` expression tree.

(expr: Expr, plan: &LogicalPlan)

/// Recursively call `LogicalPlanBuilder::normalize` on all [`Column`] expressions
/// in the `expr` expression tree.
pub fn normalize_col(expr: Expr, plan: &LogicalPlan) -> Result<Expr> {
    expr.transform(|expr| {
        Ok({
            if let Expr::Column(c) = expr {
                let col = LogicalPlanBuilder::normalize(plan, c)?;
                Transformed::yes(Expr::Column(col))
            } else {
                Transformed::no(expr)
            }
        })
    })
    .data()
}

/// See [`Column::normalize_with_schemas_and_ambiguity_check`] for usage
pub fn normalize_col_with_schemas_and_ambiguity_check(