Yes. But in some tests I did a while ago (so it may no longer be true), it appeared to me that the second part is produced even if you request it to be discarded. Normally insignificant, but if the records are very large (the OP mentioned 150+ fields) then there seemed no reason to produce what you do not need.

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.
"Too many [] have been sedated by an oppressive environment of political correctness and risk aversion."

In reply to Re^5: how to find differences between two huge files by BrowserUk
in thread how to find differences between two huge files by sayeevamsi

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