Method with_param_values

datafusion/expr/src/logical_plan/plan.rs:1285–1304

Replaces placeholder param values (like `$1`, `$2`) in [`LogicalPlan`] with the specified `param_values`. [`Prepare`] statements are converted to their inner logical plan for execution. # Example ``` # use arrow::datatypes::{Field, Schema, DataType}; use datafusion_common::ScalarValue; # use datafusion_expr::{lit, col, LogicalPlanBuilder, logical_plan::table_scan, placeholder}; # let schema = Sc

(
        self,
        param_values: impl Into<ParamValues>,
    )

    ///  );
    /// ```
    pub fn with_param_values(
        self,
        param_values: impl Into<ParamValues>,
    ) -> Result<LogicalPlan> {
        let param_values = param_values.into();
        let plan_with_values = self.replace_params_with_values(&param_values)?;

        // unwrap Prepare
        Ok(
            if let LogicalPlan::Statement(Statement::Prepare(prepare_lp)) =
                plan_with_values
            {
                param_values.verify_fields(&prepare_lp.fields)?;
                // try and take ownership of the input if is not shared, clone otherwise
                Arc::unwrap_or_clone(prepare_lp.input)
            } else {
                plan_with_values
            },
        )
    }

    /// Returns the maximum number of rows that this plan can output, if known.
    ///