#如你所见:我注释了代码!

在makefile中找到这个

# ===== Never edit below this line. Ever. Or I'll kick your ass. ====

// Caveat implementor

在OLTP数据库事务的主要触发代码中找到:

-- This line negates the @inverseqty, which is the
-- negative of the @insertedquantity.  This works through the
-- magic of the trigger.  In fact, this code is a lot like
-- the bermuda triangle!
@negquantity = -1 * @inverseqty

// but the "real" solution is much more complicated

从jpgraph

// this is really complicated

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