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880bfc3287
Previously we attempted to throw an error or at least warning for missing schemas, but this was done inconsistently because of implementation restrictions (in many cases, GUC settings are applied outside transactions so that we can't do system catalog lookups). Furthermore, there were exceptions to the rule even in the beginning, and we'd been poking more and more holes in it as time went on, because it turns out that there are lots of use-cases for having some irrelevant items in a common search_path value. It seems better to just adopt a philosophy similar to what's always been done with Unix PATH settings, wherein nonexistent or unreadable directories are silently ignored. This commit also fixes the documentation to point out that schemas for which the user lacks USAGE privilege are silently ignored. That's always been true but was previously not documented. This is mostly in response to Robert Haas' complaint that 9.1 started to throw errors or warnings for missing schemas in cases where prior releases had not. We won't adopt such a significant behavioral change in a back branch, so something different will be needed in 9.1. |
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