Major Description
We encountered a problem when using Hive bridge in production. One database has 5000+ tables. Importing the first table costs only tens of milliseconds, and then it becomes slower with more tables. In the end, it costs 1~2 seconds to import one table.
After investigation, we realized that it is not necessary for the FullTextMapperV2 to retrieve all the relationship of the database each time a table is imported. The time complexity of importing a whole database actually goes to O(n^2) (n is number of tables).
We propose to add a parameter to the constructor of EntityGraphRetriever: ignoreRelationship. When set to true, mapVertexToAtlasEntity will skip the mapRelationshipAttributes call. Since FullTextMapperV2 will not use relationship attributes of the entity, this can save plenty of time when importing entities with a large number of relations.