PS-11264: Vector index support in Data Dictionary#6000
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Vector indexes have the type (algorithm) SE_SPECIFIC, and we add a column option in the data dictionary saying `vector_index=1;` which gets picked up by dedicated code in the data dictionary and the handler part of InnoDB. In the SQL layer, the vector index is very much a thing; there is an `HA_KEY_ALG_VECTOR`, an `HA_VECTOR` and a `KEYTYPE_VECTOR`. Extra SQL is added to display the type of a vector index as VECTOR rather than SE_SPECIFIC.
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Vector indexes have the type (algorithm) SE_SPECIFIC, and we add a column option in the data dictionary saying
vector_index=1;which gets picked up by dedicated code in the data dictionary and the handler part of InnoDB.In the SQL layer, the vector index is very much a thing; there is an
HA_KEY_ALG_VECTOR, anHA_VECTORand aKEYTYPE_VECTOR.Extra SQL is added to display the type of a vector index as VECTOR rather than SE_SPECIFIC.
I you try to open a table containing a vector index in a trunk Percona server, you get a failed assertion in InnoDB when a client connects. However, if you drop the index, you can connect just fine.