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    ba288deb
    WL #12074: Volcano iterator executor base [15/15, subselect EXPLAIN] · ba288deb
    Steinar H. Gunderson authored 
    In tree EXPLAIN, print out the plan for subselects in the SELECT list.
These are not strictly part of the iterator in question, but can
nevertheless be very useful for the user to understand the execution,
so we need to be able to hook on some auxiliary information on the
iterator for the benefit of EXPLAIN.

Change-Id: Ib6f8e92622d9b13d2fa685c36ccfe029f17d63ab
    ba288deb
    WL #12074: Volcano iterator executor base [15/15, subselect EXPLAIN]
    Steinar H. Gunderson authored 
    In tree EXPLAIN, print out the plan for subselects in the SELECT list.
These are not strictly part of the iterator in question, but can
nevertheless be very useful for the user to understand the execution,
so we need to be able to hook on some auxiliary information on the
iterator for the benefit of EXPLAIN.

Change-Id: Ib6f8e92622d9b13d2fa685c36ccfe029f17d63ab