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To: pgsql-hackers <[email protected]>
Subject: what's the meaning of key?
Date: Sun, 5 Feb 2023 12:09:10 +0800
Message-ID: <[email protected]> (raw)
I'm doing research on heap_am, and for heap_beginscan func, I find
out that there is a arg called nkeys, I use some sqls as examples like
'select * from t;' and 'select * from t where a = 1', but it is always zero,
can you give me some descriptions for this? what's it used for?
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