From: Mr. Left
Date: February 10 2013 4:12pm
Subject: when propagate_cond_constants will be called?
List-Archive: http://lists.mysql.com/internals/38721
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Hi, all
Is there anyone can tell me when the function=C2=A0propagate_cond_constants=
() will be really used? Cause I found after the build_equal_items(), all It=
em_func::EQ_FUNC
are transformed to Item_func::MULT_EQUAL_FUNC.
And the example in mysql internals 8.2.1.1. Constant Propagation, just refe=
r to=C2=A0propagate_cond_constants(), but all translate are really finished=
 in=C2=A0build_equal_items().

So I want to know when the function=C2=A0propagate_cond_constants() will re=
ally work? It's kind of you to supply an example.
Thank you very much.