Method set_outer_from_schema

datafusion/sql/src/planner.rs:366–372

Sets the outer FROM schema, returning the existing one, if any

(
        &mut self,
        mut schema: Option<DFSchemaRef>,
    )

    /// Sets the outer FROM schema, returning the existing one, if any
    pub fn set_outer_from_schema(
        &mut self,
        mut schema: Option<DFSchemaRef>,
    ) -> Option<DFSchemaRef> {
        std::mem::swap(&mut self.outer_from_schema, &mut schema);
        schema
    }

    /// Extends the FROM schema, returning the existing one, if any
    pub fn extend_outer_from_schema(&mut self, schema: &DFSchemaRef) -> Result<()> {