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Add index cardinality info in the show index statement #42227

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shenli opened this issue Mar 14, 2023 · 0 comments · Fixed by #42441
Closed

Add index cardinality info in the show index statement #42227

shenli opened this issue Mar 14, 2023 · 0 comments · Fixed by #42441
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@shenli
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shenli commented Mar 14, 2023 •
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Enhancement

Now the cardinality is always zero in the result of show index statement.

tidb/executor/show.go

Line 806 in 7c3a22e

0, // Cardinality
. It is hard code here.
I think there is cardinality in the statistics. Can you replace the hard code data with the real data?
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executor: display Cardinality info from stats for SHOW INDEX | tidb-test=pr/2107 winoros/tidb
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