Re: BUG #15114: logical decoding Segmentation fault

Alvaro Herrera wrote:

> I agree -- I think logicalrep_write_attrs() should not use
> RelationGetIndexAttrBitmap at all but instead use some lower-level way
> to obtain columns of the replica identity.  I don't know whether there
> are historical-snapshot-related considerations to care about, in this
> code, though.

Here's a patch.  There is a disadvantage: one additional syscache lookup
each time logicalrep_write_attrs() is called.  I think that's all right,
since that's done once for each relation being replicated (not, say,
once per tuple or once per transaction).  Even so, I tried to move this
code as a special "quick-path" case in RelationGetIndexAttrBitmap, so
that it could be cached separately without processing the other indexes.
That turned out a bit too messy for my taste.


-- 
Álvaro Herrera                https://www.2ndQuadrant.com/
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