When Optimizer Uses Index Merge Some Rows are Missing in the Result Set (Doc ID 1537857.1)

Last updated on MARCH 08, 2017

Applies to:

MySQL Server - Version 5.0 to 5.6 [Release 5.0 to 5.6]
Information in this document applies to any platform.

Symptoms

The result set of a query where an index merge is used during the execution, some rows are missing from the result set.

For example using the following table and data:

Cause

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