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help / color / mirror / Atom feedFrom: jian he <[email protected]>
To: Richard Guo <[email protected]>
Cc: Robert Haas <[email protected]>
Cc: Tender Wang <[email protected]>
Cc: Paul George <[email protected]>
Cc: Andy Fan <[email protected]>
Cc: PostgreSQL-development <[email protected]>
Cc: [email protected]
Subject: Re: Eager aggregation, take 3
Date: Thu, 9 Jan 2025 11:15:09 +0800
Message-ID: <CACJufxEnz3M=23pJ44iesV0pK_UhswnFUiFs2mhOG6+pYK8rbA@mail.gmail.com> (raw)
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hi.
in create_grouping_expr_infos
tce = lookup_type_cache(exprType((Node *) tle->expr),
TYPECACHE_BTREE_OPFAMILY);
if (!OidIsValid(tce->btree_opf) ||
!OidIsValid(tce->btree_opintype))
return;
....
/*
* Get the operator in the btree's opfamily.
*/
eq_op = get_opfamily_member(tce->btree_opf,
tce->btree_opintype,
tce->btree_opintype,
BTEqualStrategyNumber);
if (!OidIsValid(eq_op))
return;
eq_opfamilies = get_mergejoin_opfamilies(eq_op);
if (!eq_opfamilies)
return;
btree_opfamily = linitial_oid(eq_opfamilies);
If eq_op is valid, then we don't need to call get_mergejoin_opfamilies?
since get_mergejoin_opfamilies output will be the same as tce->btree_opf.
and we already checked (tce->btree_opf) is valid.
In other words, I think eq_op is valid imply
that tce->btree_opf is the value (btree opfamily) we need.
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To: [email protected]
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Subject: Re: Eager aggregation, take 3
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