Note This performance gain will be noticeable after you enable trace flags 6532, 6533, and 6534. These are per-session flags, but they can be enabled globally.
The STRelate and STAsBinary functions may return unexpected results when trace flag 6533 is enabled. Do not use this trace flag if your workload involves either of these functions. This issue will be fixed in the next cumulative update for SQL Server 2012 SP3.
bugs that are fixed in SQL Server 2012 Service Pack 3 .
About Service packs for SQL Server
Service packs are cumulative. Each new service pack contains all the fixes that are in previous service packs, together with any new fixes. Our recommendation is to apply the latest service pack and the latest cumulative update for that service pack. You do not have to install a previous service pack before you install the latest service pack. Use Table 1 in the following article for finding more information about the latest service pack and latest cumulative update.
How to determine the version, edition and update level of SQL Server and its components
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