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Frequently Asked Questions (FAQ) for PostgreSQL
- Last updated: Wed Aug 25 23:18:13 EDT 2004
+ Last updated: Tue Aug 31 23:28:02 EDT 2004
Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
@@ -797,6 +797,10 @@
section 4.12.
* The default C locale must be used during initdb.
+ In pre-8.0 releases, indexes often can not be used unless the data
+ types exactly match the index's column types. This is particularly
+ true of int2, int8, and numeric column indexes.
+
4.9) How do I see how the query optimizer is evaluating my query?
See the EXPLAIN manual page.