Method append_outer_query_schema

datafusion/sql/src/planner.rs:334–336

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

(&mut self, schema: DFSchemaRef)

    /// Sets the outer query schema, returning the existing one, if
    /// any
    pub fn append_outer_query_schema(&mut self, schema: DFSchemaRef) {
        self.outer_queries_schemas_stack.push(schema);
    }

    /// The schema of the adjacent outer relation
    pub fn latest_outer_query_schema(&self) -> Option<&DFSchemaRef> {