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caca6d8d27
When _bt_readnextpage is called with our nbtree parallel scan already
seized (i.e. when it is directly called by _bt_first), we never expect a
prior call to _bt_readpage for lastcurrblkno to already indicate that
the scan should end -- the _bt_first caller's blkno must always be read.
After all, the "prior" _bt_readpage call (the call for lastcurrblkno)
probably took place in some other backend (and it might not even have
finished by the time our backend reaches _bt_first/_bt_readnextpage).
Add a documenting assertion to the path where _bt_readnextpage ends the
parallel scan based on information about lastcurrblkno from so->currPos.
Assert that the most recent _bt_readpage call that set so->currPos is in
fact lastcurrblkno's _bt_readpage call.
Follow-up to bugfix commit
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| .. | ||
| brin | ||
| common | ||
| gin | ||
| gist | ||
| hash | ||
| heap | ||
| index | ||
| nbtree | ||
| rmgrdesc | ||
| sequence | ||
| spgist | ||
| table | ||
| tablesample | ||
| transam | ||
| Makefile | ||
| meson.build | ||