How to make a OpExpr check compatible among different versions
От
Andy Fan
Тема
How to make a OpExpr check compatible among different versions
Дата
Msg-id
CAKU4AWqrv8AZQFi7x2O2cME2ifDw18ZDRzuQnMgWwiXyJo_RfQ@mail.gmail.com
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Дерево обсуждения
How to make a OpExpr check compatible among different versions Andy Fan <zhihui.fan1213@gmail.com>
Re: How to make a OpExpr check compatible among different versions Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Re: How to make a OpExpr check compatible among different versions Andy Fan <zhihui.fan1213@gmail.com>
During one of my works for logical rewrite, I want to check if the expr is a given Expr.
so the simplest way is:
if (expr->opno == 418 && nodeTag(linitial(expr->args)) == T_xxx && nodeTag(lsecond(expr->args)) == T_yyyy )
{
..
}
if we write code like above, we may have issues if the oid changed in the future version.
so what would be your suggestion?
Thanks
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