On Thu, 2003-10-02 at 14:30, Rong Wu wrote: > Hi, > > I have a select like this: > > SELECT MAX(transactionid) FROM cbntransaction WHERE transactiontypeid=0;
For various reasons (primarily MVCC and the ability to make custom aggregates making it difficult) MAX() is not optimized in this fashion. Try: SELECT transactionid FROM ... WHERE ... ORDER BY transactionid DESC LIMIT 1;
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