Can't match any vertex

[zyxdSTU]

Hello friends.
I have already create a vertex 关系8_关系9_vertex , and the tag of it is relation_concept.
But the query sql can't match any things match (n:relation_concept) return n limit 3;

Can someone help me. Thanks.

[czpmango]

Please rebuild the tag index on relation_concept.

[czpmango]

SHOW TAG INDEXES to list the indexes created and REBUILD TAG INDEX <index_name> to rebuild the specified index.

[zyxdSTU]

I have already rebuilded the index of relation_concept. The problem is solved. Thanks.
And I have another question, When need to rebuild the index, the time of index created or the time of index update .

[wey-gu]

I have already rebuilded the index of relation_concept. The problem is solved. Thanks. And I have another question, When need to rebuild the index, the time of index created or the time of index update .

The index data will be created during the data insert/update when its schema(index definition) exists.
For those data inserted before the index definition exists, we need to explicitly let it create with the index rebuild command.

ref:

Chineses

• https://docs.nebula-graph.com.cn/3.3.0/3.ngql-guide/14.native-index-statements/
• https://www.siwei.io/nebula-index-explained/

English

• https://docs.nebula-graph.io/3.3.0/3.ngql-guide/14.native-index-statements/
• https://www.siwei.io/en/nebula-index-explained/