Method extend_outer_from_schema

datafusion/sql/src/planner.rs:375–381

Extends the FROM schema, returning the existing one, if any

(&mut self, schema: &DFSchemaRef)

    /// Extends the FROM schema, returning the existing one, if any
    pub fn extend_outer_from_schema(&mut self, schema: &DFSchemaRef) -> Result<()> {
        match self.outer_from_schema.as_mut() {
            Some(from_schema) => Arc::make_mut(from_schema).merge(schema),
            None => self.outer_from_schema = Some(Arc::clone(schema)),
        };
        Ok(())
    }

    /// Return the types of parameters (`$1`, `$2`, etc) if known
    pub fn prepare_param_data_types(&self) -> &[Option<FieldRef>] {