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Oh, one more thing: > Second, you can reduce the total number of queries by batching > multiple objectIds into the same query -- "SELECT ra, decl FROM > secondaryIndex WHERE objectId IN (..., ..., ...)" or its equivalent if > you're using a non-SQL index. Even if we're using a SQL index, we can have a non-SQL service that optimizes large-batch queries, either through a copy or using more-optimal SQL. -- Kian-Tat Lim, LSST Data Management, [log in to unmask] ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the QSERV-L list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=QSERV-L&A=1