* Tom Lane: >> According to EXPLAIN, an index scan on the bar column is used (using >> the underlying B-tree index). > > Do you mean an indexscan followed immediately by a Unique node? If > so, yeah, that would depend entirely on correct ordering of the > indexscan output to produce distinct results. Yes. >> If I drop the DISTINCT, the output is not correctly ordered, either. >> Perhaps this is an index corruption issue? The hardware itself seems >> fine. > > Perhaps. Do you want to save off a physical copy of the index and then > try REINDEXing? The duplicate row is gone. > If that fixes it, I'd be interested to compare the two versions of > the index. The index files are about 155 MB and 98 MB, compressed. How shall we transfer them? (Their contents is not super-secret, but I don't want to distribute them widely, either.) -- Florian Weimer <fweimer@xxxxxx> BFK edv-consulting GmbH http://www.bfk.de/ Kriegsstraße 100 tel: +49-721-96201-1 D-76133 Karlsruhe fax: +49-721-96201-99
