When Optimizer Uses Index Merge Some Rows are Missing in the Result Set
(Doc ID 1537857.1)
Last updated on FEBRUARY 22, 2019
Applies to:MySQL Server - Version 5.0 to 5.6 [Release 5.0 to 5.6]
Information in this document applies to any platform.
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:
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