WL#2499: Use same savepoint id for an entire SQL statement
Affects: Server-7.1 — Status: Assigned — Priority: Medium
This WL item is connected to WL 2443. For WL 2443 to work it is necessary to perform all reads in an UPDATE statement using the savepoint id at start of the statement. If not then we are going to see our own updates and perform additional updates based on this information. Currently this works since the MySQL Server performs a pre-read in the difficult cases. This means that we perform 2 reads before updating and we would like to go down to 1 read at most and in many cases even down to zero reads before updating. Should be possible to solve entirely in the NDB handler
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