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Comment: hive.auto.convert.join has wrong default value in hive-default.xml.template

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Whether Hive enables the optimization about converting common join into mapjoin based on the input file size. (Note that hive-default.xml.template incorrectly gives the default as false in Hive 0.11.0 through 0.13.1.)

hive.auto.convert.join.noconditionaltask

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