Hi Junwang, > > I'm looking at the catalog definition, I have some questions which > might be silly.
Thanks for your interest in SQL/PGQ. > > Each pg element can have multiple labels(whose properties belong > to the same pg element), can we have multiple elements share the > same label? Yes. A label can be shared between edges and vertices as well. > > If we have a 1..* relation between element and label, I think maybe > we don't need _pg_propgraph_label_. pg_propgraph_label is used to map a label name in a given property graph to its OID. pg_propgraph_element_label - can be used to find all the elements with a given label and all the labels of a given element. The relationship is many to many. > > From the name _pg_propgraph_label_property_, I tend to think it is > referencing _pg_propgraph_label_, but actually it is referencing > _pg_propgraph_element_label_. > Right. -- Best Wishes, Ashutosh Bapat
