Function project

datafusion/expr/src/logical_plan/builder.rs:1930–1935

Create Projection # Errors This function errors under any of the following conditions: Two or more expressions have the same name An invalid expression is used (e.g. a `sort` expression)

(
    plan: LogicalPlan,
    expr: impl IntoIterator<Item = impl Into<SelectExpr>>,
)

/// * Two or more expressions have the same name
/// * An invalid expression is used (e.g. a `sort` expression)
pub fn project(
    plan: LogicalPlan,
    expr: impl IntoIterator<Item = impl Into<SelectExpr>>,
) -> Result<LogicalPlan> {
    project_with_validation(plan, expr.into_iter().map(|e| (e, true)), None)
}

/// Create Projection. Similar to project except that the expressions
/// passed in have a flag to indicate if that expression requires