Tom Lane 写道: > > Yeah, this is considered a feature not a bug. In fact the original > > implementation just returned the domain's OID, and that was objected > > to because most client programs wouldn't recognize it. > > > > > How to disable this feature ?
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TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match
