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Yang, Tong
6182f91ba8
Reviewed-by: Hasko, Vladimir <vladimir.hasko@t-systems.com> Co-authored-by: Yang, Tong <yangtong2@huawei.com> Co-committed-by: Yang, Tong <yangtong2@huawei.com>
15 lines
1.4 KiB
HTML
15 lines
1.4 KiB
HTML
<a name="mrs_01_2325"></a><a name="mrs_01_2325"></a>
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<h1 class="topictitle1">Why Does Hive Not Support Vectorized Query?</h1>
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<div id="body1601117284610"><div class="section" id="mrs_01_2325__s00057ad6e9d340e7ac85cc8cab57b5b8"><h4 class="sectiontitle">Question</h4><p id="mrs_01_2325__ab205ccde787940e3a698bda21dcfb0b1">When the vectorized parameter<strong id="mrs_01_2325__b38606452322"> hive.vectorized.execution.enabled</strong> is set to <strong id="mrs_01_2325__b18232125003210">true</strong>, why do some null pointers or type conversion exceptions occur occasionally when Hive on Tez/MapReduce/Spark is executed?</p>
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<div class="section" id="mrs_01_2325__s09d91bfe41564a339cdf23a7fdda4275"><h4 class="sectiontitle">Answer</h4><p id="mrs_01_2325__a10b57e19335249c586b6f0b2eeb69492">Currently, Hive does not support vectorized execution. Many community issues are introduced during vectorized execution and are not resolved stably. The default value of <strong id="mrs_01_2325__b34334222340">hive.vectorized.execution.enabled</strong> is <strong id="mrs_01_2325__b17661172614340">false</strong>. You are advised not to set this parameter to <strong id="mrs_01_2325__b114821841123417">true</strong>.</p>
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<div class="parentlink"><strong>Parent topic:</strong> <a href="mrs_01_1752.html">Common Issues About Hive</a></div>
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