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 b5ee4e52.
PostgreSQL Database Management System
This directory contains the source code distribution of the PostgreSQL database management system.
PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings.
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