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From: Tom Lane <[email protected]>
To: Sbob <[email protected]>
Cc: Rui DeSousa <[email protected]>
Cc: [email protected] <[email protected]>
Subject: Re: checking for a NULL date in a partitioned table kills performance
Date: Thu, 22 Aug 2024 20:05:19 -0400
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
	<[email protected]>
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	<[email protected]>

Sbob <[email protected]> writes:
> 29 million of the 32 million rows in the table have NULL for contract_date

[ blink... ]  So your query is selecting at least 29/32nds of the
table, plus however much matches the contract_date > '2022-01-01'
alternative.  I'm not sure how you expect that to be significantly
cheaper than scanning the whole table.

			regards, tom lane

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