Function getSchema

src/graph/on_disk_graph.cpp:64–71

We generate an empty schema with one group even if exprs is empty because we always need to scan edgeID and nbrNodeID which will need the state of empty data chunk.

// We generate an empty schema with one group even if exprs is empty because we always need to
// scan edgeID and nbrNodeID which will need the state of empty data chunk.
static Schema getSchema(const expression_vector& exprs) {
    auto schema = Schema();
    schema.createGroup();
    for (auto expr : exprs) {
        schema.insertToGroupAndScope(expr, 0);
    }
    return schema;
}

static ResultSet getResultSet(Schema* schema, MemoryManager* mm) {
    auto descriptor = ResultSetDescriptor(schema);