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href="//www.neidfyre.com/docs/spark/latest/spark-sql/language-manual/#ansi-compliance-in-databricks-runtime" title=""></a></h1> <p><strong>适用于:</strong><img alt="检查标记是的" src="//www.neidfyre.com/docs/spark/latest/_images/check.png">砖运行时</p> <p>本文描述了在砖ANSI的合规运行时。ANSI SQL模式数据砖,请参阅<一个class="reference internal" href="//www.neidfyre.com/docs/spark/latest/spark-sql/language-manual/parameters/ansi_mode.html"><span class="doc">ANSI_MODE</span></a>。</p> <p>火花SQL有两个选项支持符合ANSI SQL标准:<code class="docutils literal notranslate"><span class="pre">spark.sql.ansi.enabled</span></code>和<code class="docutils literal notranslate"><span class="pre">spark.sql.storeAssignmentPolicy</span></code>。</p> <p>当<code class="docutils literal notranslate"><span class="pre">spark.sql.ansi.enabled</span></code>被设置为<code class="docutils literal notranslate"><span class="pre">真正的</span></code>,火花SQL使用ANSI兼容的方言,而不是蜂巢兼容。例如,火花会在运行时抛出异常,而不是返回null结果如果输入SQL操作符/函数是无效的。ANSI方言一些特性可能不是直接从ANSI SQL标准,但是他们的行为与ANSI SQL的风格一致。</p> <p>此外,火花SQL有独立的选项来控制隐式铸造行为当插入一个表中的记录。铸造的行为被定义为存储分配规则的标准。</p> <p>当<code class="docutils literal notranslate"><span class="pre">spark.sql.storeAssignmentPolicy</span></code>被设置为<code class="docutils literal notranslate"><span class="pre">ANSI</span></code>,火花符合ANSI SQL存储分配规则。这是一个单独的配置,因为它的默认值<code class="docutils literal notranslate"><span class="pre">ANSI</span></code>,而配置<code class="docutils literal notranslate"><span class="pre">spark.sql.ansi.enabled</span></code>默认情况下是禁用的。</p> <p>下表总结了行为:</p> <table class="docutils align-default"> <colgroup> <col style="width: 33%"> <col style="width: 33%"> <col style="width: 33%"> </colgroup> <thead> <tr class="row-odd"> <th class="head"><p>属性名</p></th> <th class="head"><p>默认的</p></th> <th class="head"><p>意义</p></th> </tr> </thead> <tbody> <tr class="row-even"> <td><p><code class="docutils literal notranslate"><span class="pre">spark.sql.ansi.enabled</span></code></p></td> <td><p>假</p></td> <td><p>时真的,火花尝试符合ANSI SQL规范:</p> <ul class="simple"> <li><p>抛出一个运行时异常如果一个溢出发生在任何操作在一个整数或小数。</p></li> <li><p>禁止使用保留关键字标识符的ANSI SQL SQL解析器。</p></li> </ul></td> </tr> <tr class="row-odd"> <td><p><code class="docutils literal notranslate"><span class="pre">spark.sql.storeAssignmentPolicy</span></code></p></td> <td><p>ANSI</p></td> <td><p>当一个值插入一列有不同的数据类型,火花执行类型转换。有三个政策强制类型转换规则:<code class="docutils literal notranslate"><span class="pre">ANSI</span></code>,<code class="docutils literal notranslate"><span class="pre">遗产</span></code>,<code class="docutils literal notranslate"><span class="pre">严格的</span></code>。</p> <ul class="simple"> <li><p><code class="docutils literal notranslate"><span class="pre">ANSI</span></code>:火花执行类型强制按照ANSI SQL。在实践中,主要是一样的PostgreSQL的行为。它不允许某些不合理等类型转换将字符串转换为int或双布尔。</p></li> <li><p><code class="docutils literal notranslate"><span class="pre">遗产</span></code>:火花允许强制类型转换,只要它是有效的,这是非常宽松。例如,将字符串转换为int或双布尔是被允许的。它也是唯一的行为引发2。x和兼容蜂巢。</p></li> <li><p><code class="docutils literal notranslate"><span class="pre">严格的</span></code>:火花不允许任何可能的精度损失或数据截断的强制类型转换,例如,将双整数或小数双是不允许的。</p></li> </ul></td> </tr> </tbody> </table> <p>下面的小礼物的行为变化的算术运算,类型转换,当ANSI SQL解析模式启用。火花类型转换的SQL,有三种,本文将介绍他们一个接一个:演员、存储分配和强制类型转换。</p> <div class="section" id="arithmetic-operations"> <h2>算术运算<一个class="headerlink" href="//www.neidfyre.com/docs/spark/latest/spark-sql/language-manual/#arithmetic-operations" title=""></a></h2> <p>在火花SQL,算术运算进行数值类型(除了小数)不检查默认溢出。这意味着如果一个操作导致溢出,结果都是一样的,在Java或Scala程序中相应的操作(例如,如果两个整数之和大于最大值可表示的,结果是负数)。另一方面,火花SQL返回null十进制溢出。当<code class="docutils literal notranslate"><span class="pre">spark.sql.ansi.enabled</span></code>被设置为<code class="docutils literal notranslate"><span class="pre">真正的</span></code>和一个溢出发生在数字和区间算术运算,它在运行时抛出一个算术异常。</p> <div class="highlight-sql notranslate"> <div class="highlight"> <pre><span></span><span class="c1">——“spark.sql.ansi.enabled = true”</span><span class="o">></span><span class="w"></span><span class="k">选择</span><span class="w"></span><span class="mi">2147483647</span><span class="w"></span><span class="o">+</span><span class="w"></span><span class="mi">1</span><span class="p">;</span><span class="w"></span><span class="w"></span><span class="n">错误</span><span class="p">:</span><span class="w"></span><span class="nb">整数</span><span class="w"></span><span class="n">溢出</span><span class="w"></span><span class="c1">——“spark.sql.ansi.enabled = false”</span><span class="o">></span><span class="w"></span><span class="k">选择</span><span class="w"></span><span class="mi">2147483647</span><span class="w"></span><span class="o">+</span><span class="w"></span><span class="mi">1</span><span class="p">;</span><span class="w"></span><span class="w"></span><span class="o">- - - - - -</span><span class="mi">2147483648</span><span class="w"></span></pre> </div> </div> </div> <div class="section" id="cast"> <h2>投<一个class="headerlink" href="//www.neidfyre.com/docs/spark/latest/spark-sql/language-manual/#cast" title=""></a></h2> <p>当<code class="docutils literal notranslate"><span class="pre">spark.sql.ansi.enabled</span></code>被设置为<code class="docutils literal notranslate"><span class="pre">真正的</span></code>显式铸造,<code class="docutils literal notranslate"><span class="pre">投</span></code>语法抛出一个运行时异常非法投模式中定义的标准,如将从一个字符串转换为一个整数。</p> <p>的<code class="docutils literal notranslate"><span class="pre">投</span></code>火花ANSI模式遵循语法规则条款第6.13节“铸规范”<一个class="reference external" href="https://www.iso.org/standard/53682.html">ISO / IEC 9075 - 2:2011信息技术——数据库语言- SQL -第2部分:基础(SQL /基金会)</一个>,除了它特别允许以下简单类型转换是不允许按照ANSI标准:</p> <ul class="simple"> <li><p>NumericType < = > BooleanType</p></li> <li><p>StringType < = > BinaryType</p></li> </ul> <p>有效的源和目标数据类型的组合<code class="docutils literal notranslate"><span class="pre">投</span></code>表达式由下表给出。“Y”表明,结合语法有效没有限制和“N”表明,组合是无效的。</p> <table class="docutils align-default"> <colgroup> <col style="width: 18%"> <col style="width: 9%"> <col style="width: 8%"> <col style="width: 5%"> <col style="width: 12%"> <col style="width: 11%"> <col style="width: 9%"> <col style="width: 8%"> <col style="width: 7%"> <col style="width: 4%"> <col style="width: 8%"> </colgroup> <thead> <tr class="row-odd"> <th class="head"><p>SourceTarget</p></th> <th class="head"><p>数字</p></th> <th class="head"><p>字符串</p></th> <th class="head"><p>日期</p></th> <th class="head"><p>时间戳</p></th> <th class="head"><p>时间间隔</p></th> <th class="head"><p>布尔</p></th> <th class="head"><p>二进制</p></th> <th class="head"><p>数组</p></th> <th class="head"><p>地图</p></th> <th class="head"><p>结构体</p></th> </tr> </thead> <tbody> <tr class="row-even"> <td><p>数字</p></td> <td><p>Y</p></td> <td><p>Y</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>Y</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> </tr> <tr class="row-odd"> <td><p>字符串</p></td> <td><p>Y</p></td> <td><p>Y</p></td> <td><p>Y</p></td> <td><p>Y</p></td> <td><p>Y</p></td> <td><p>Y</p></td> <td><p>Y</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> </tr> <tr class="row-even"> <td><p>日期</p></td> <td><p>N</p></td> <td><p>Y</p></td> <td><p>Y</p></td> <td><p>Y</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> </tr> <tr class="row-odd"> <td><p>时间戳</p></td> <td><p>N</p></td> <td><p>Y</p></td> <td><p>Y</p></td> <td><p>Y</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> </tr> <tr class="row-even"> <td><p>时间间隔</p></td> <td><p>N</p></td> <td><p>Y</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>Y</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> </tr> <tr class="row-odd"> <td><p>布尔</p></td> <td><p>Y</p></td> <td><p>Y</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>Y</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> </tr> <tr class="row-even"> <td><p>二进制</p></td> <td><p>Y</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>Y</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> </tr> <tr class="row-odd"> <td><p>数组</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>Y</p></td> <td><p>N</p></td> <td><p>N</p></td> </tr> <tr class="row-even"> <td><p>地图</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>Y</p></td> <td><p>N</p></td> </tr> <tr class="row-odd"> <td><p>结构体</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>Y</p></td> </tr> </tbody> </table> <div class="highlight-sql notranslate"> <div class="highlight"> <pre><span></span><span class="c1">——明确铸造的例子</span><span class="c1">——“spark.sql.ansi.enabled = true”</span><span class="o">></span><span class="w"></span><span class="k">选择</span><span class="w"></span><span class="k">投</span><span class="p">(</span><span class="s1">“一个”</span><span class="w"></span><span class="k">作为</span><span class="w"></span><span class="nb">INT</span><span class="p">);</span><span class="w"></span><span class="w"></span><span class="n">错误</span><span class="p">:</span><span class="w"></span><span class="n">无效的</span><span class="w"></span><span class="k">输入</span><span class="w"></span><span class="n">语法</span><span class="w"></span><span class="k">为</span><span class="w"></span><span class="k">类型</span><span class="w"></span><span class="nb">数字</span><span class="p">:</span><span class="w"></span><span class="n">一个</span><span class="w"></span><span class="o">></span><span class="w"></span><span class="k">选择</span><span class="w"></span><span class="k">投</span><span class="p">(</span><span class="mi">2147483648</span><span class="n">l</span><span class="w"></span><span class="k">作为</span><span class="w"></span><span class="nb">INT</span><span class="p">);</span><span class="w"></span><span class="w"></span><span class="n">错误</span><span class="p">:</span><span class="w"></span><span class="n">铸造</span><span class="w"></span><span class="mi">2147483648</span><span class="w"></span><span class="k">来</span><span class="w"></span><span class="nb">int</span><span class="w"></span><span class="n">原因</span><span class="w"></span><span class="n">溢出</span><span class="w"></span><span class="o">></span><span class="w"></span><span class="k">选择</span><span class="w"></span><span class="k">投</span><span class="p">(</span><span class="nb">日期</span><span class="s1">“2020-01-01”</span><span class="w"></span><span class="k">作为</span><span class="w"></span><span class="nb">INT</span><span class="p">)</span><span class="w"></span><span class="w"></span><span class="n">错误</span><span class="p">:</span><span class="w"></span><span class="n">不能</span><span class="w"></span><span class="n">解决</span><span class="w"></span><span class="s1">“铸(日期”</span><span class="mi">2020年</span><span class="o">- - - - - -</span><span class="mi">01</span><span class="o">- - - - - -</span><span class="mi">01</span><span class="s1">“INT)”</span><span class="w"></span><span class="n">由于</span><span class="w"></span><span class="k">来</span><span class="w"></span><span class="k">数据</span><span class="w"></span><span class="k">类型</span><span class="w"></span><span class="n">不匹配</span><span class="p">:</span><span class="w"></span><span class="n">不能</span><span class="w"></span><span class="k">投</span><span class="w"></span><span class="nb">日期</span><span class="w"></span><span class="k">来</span><span class="w"></span><span class="nb">int</span><span class="p">。</span><span class="w"></span><span class="k">来</span><span class="w"></span><span class="k">转换</span><span class="w"></span><span class="k">值</span><span class="w"></span><span class="k">从</span><span class="w"></span><span class="nb">日期</span><span class="w"></span><span class="k">来</span><span class="w"></span><span class="nb">int</span><span class="p">,</span><span class="w"></span><span class="n">你</span><span class="w"></span><span class="n">可以</span><span class="w"></span><span class="n">使用</span><span class="w"></span><span class="k">函数</span><span class="w"></span><span class="n">UNIX_DATE</span><span class="w"></span><span class="k">而不是</span><span class="p">。</span><span class="w"></span><span class="c1">——“spark.sql.ansi.enabled = false”(This is a default behavior)</span><span class="o">></span><span class="w"></span><span class="k">选择</span><span class="w"></span><span class="k">投</span><span class="p">(</span><span class="s1">“一个”</span><span class="w"></span><span class="k">作为</span><span class="w"></span><span class="nb">INT</span><span class="p">);</span><span class="w"></span><span class="w"></span><span class="k">零</span><span class="w"></span><span class="o">></span><span class="w"></span><span class="k">选择</span><span class="w"></span><span class="k">投</span><span class="p">(</span><span class="mi">2147483648</span><span class="n">l</span><span class="w"></span><span class="k">作为</span><span class="w"></span><span class="nb">INT</span><span class="p">);</span><span class="w"></span><span class="w"></span><span class="o">- - - - - -</span><span class="mi">2147483648</span><span class="w"></span><span class="o">></span><span class="w"></span><span class="k">选择</span><span class="w"></span><span class="k">投</span><span class="p">(</span><span class="nb">日期</span><span class="s1">“2020-01-01”</span><span class="w"></span><span class="k">作为</span><span class="w"></span><span class="nb">INT</span><span class="p">);</span><span class="w"></span><span class="w"></span><span class="k">零</span><span class="w"></span><span class="c1">——存储分配规则的例子</span><span class="o">></span><span class="w"></span><span class="k">创建</span><span class="w"></span><span class="k">表</span><span class="w"></span><span class="n">t</span><span class="w"></span><span class="p">(</span><span class="n">v</span><span class="w"></span><span class="nb">INT</span><span class="p">);</span><span class="w"></span><span class="c1">——“spark.sql.storeAssignmentPolicy = ANSI”</span><span class="o">></span><span class="w"></span><span class="k">插入</span><span class="w"></span><span class="k">成</span><span class="w"></span><span class="n">t</span><span class="w"></span><span class="k">值</span><span class="w"></span><span class="p">(</span><span class="s1">' 1 '</span><span class="p">);</span><span class="w"></span><span class="w"></span><span class="n">错误</span><span class="p">:</span><span class="w"></span><span class="n">不能</span><span class="w"></span><span class="k">写</span><span class="w"></span><span class="n">不兼容的</span><span class="w"></span><span class="k">数据</span><span class="w"></span><span class="k">来</span><span class="w"></span><span class="k">表</span><span class="w"></span><span class="s1">“违约”。“t”</span><span class="p">:</span><span class="w"></span><span class="o">- - - - - -</span><span class="w"></span><span class="n">不能</span><span class="w"></span><span class="n">安全</span><span class="w"></span><span class="k">投</span><span class="w"></span><span class="s1">“v”</span><span class="p">:</span><span class="w"></span><span class="n">字符串</span><span class="w"></span><span class="k">来</span><span class="w"></span><span class="nb">int</span><span class="p">;</span><span class="w"></span><span class="c1">——“spark.sql。storeAssignmentPolicy =遗产”(这是一个遗留的行为直到火花2. x)</span><span class="o">></span><span class="w"></span><span class="k">插入</span><span class="w"></span><span class="k">成</span><span class="w"></span><span class="n">t</span><span class="w"></span><span class="k">值</span><span class="w"></span><span class="p">(</span><span class="s1">' 1 '</span><span class="p">);</span><span class="w"></span><span class="o">></span><span class="w"></span><span class="k">选择</span><span class="w"></span><span class="o">*</span><span class="w"></span><span class="k">从</span><span class="w"></span><span class="n">t</span><span class="p">;</span><span class="w"></span><span class="w"></span><span class="mi">1</span><span class="w"></span></pre> </div> </div> </div> <div class="section" id="store-assignment"> <h2>存储分配<一个class="headerlink" href="//www.neidfyre.com/docs/spark/latest/spark-sql/language-manual/#store-assignment" title=""></a></h2> <p>正如一开始所提到的,当<code class="docutils literal notranslate"><span class="pre">spark.sql.storeAssignmentPolicy</span></code>被设置为<code class="docutils literal notranslate"><span class="pre">ANSI</span></code>(这是默认值),火花符合ANSI SQL存储分配规则表插入。源和目标的有效组合表插入数据类型由下表给出。</p> <table class="docutils align-default"> <colgroup> <col style="width: 18%"> <col style="width: 9%"> <col style="width: 8%"> <col style="width: 5%"> <col style="width: 12%"> <col style="width: 11%"> <col style="width: 9%"> <col style="width: 8%"> <col style="width: 7%"> <col style="width: 4%"> <col style="width: 8%"> </colgroup> <thead> <tr class="row-odd"> <th class="head"><p>SourceTarget</p></th> <th class="head"><p>数字</p></th> <th class="head"><p>字符串</p></th> <th class="head"><p>日期</p></th> <th class="head"><p>时间戳</p></th> <th class="head"><p>时间间隔</p></th> <th class="head"><p>布尔</p></th> <th class="head"><p>二进制</p></th> <th class="head"><p>数组</p></th> <th class="head"><p>地图</p></th> <th class="head"><p>结构体</p></th> </tr> </thead> <tbody> <tr class="row-even"> <td><p>数字</p></td> <td><p>Y</p></td> <td><p>Y</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> </tr> <tr class="row-odd"> <td><p>字符串</p></td> <td><p>N</p></td> <td><p>Y</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> </tr> <tr class="row-even"> <td><p>日期</p></td> <td><p>N</p></td> <td><p>Y</p></td> <td><p>Y</p></td> <td><p>Y</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> </tr> <tr class="row-odd"> <td><p>时间戳</p></td> <td><p>N</p></td> <td><p>Y</p></td> <td><p>Y</p></td> <td><p>Y</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> </tr> <tr class="row-even"> <td><p>时间间隔</p></td> <td><p>N</p></td> <td><p>Y</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>Y</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> </tr> <tr class="row-odd"> <td><p>布尔</p></td> <td><p>N</p></td> <td><p>Y</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>Y</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> </tr> <tr class="row-even"> <td><p>二进制</p></td> <td><p>N</p></td> <td><p>Y</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>Y</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> </tr> <tr class="row-odd"> <td><p>数组</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>Y *</p></td> <td><p>N</p></td> <td><p>N</p></td> </tr> <tr class="row-even"> <td><p>地图</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>Y *</p></td> <td><p>N</p></td> </tr> <tr class="row-odd"> <td><p>结构体</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>N</p></td> <td><p>Y *</p></td> </tr> </tbody> </table> <p>*数组/地图/结构体类型、数据类型检查规则递归地适用于它的组成元素。</p> <p>在表中插入,火花将抛出异常数值溢出。</p> <div class="highlight-sql notranslate"> <div class="highlight"> <pre><span></span><span class="o">></span><span class="w"></span><span class="k">创建</span><span class="w"></span><span class="k">表</span><span class="w"></span><span class="n">测试</span><span class="p">(</span><span class="n">我</span><span class="w"></span><span class="nb">INT</span><span class="p">);</span><span class="w"></span><span class="o">></span><span class="w"></span><span class="k">插入</span><span class="w"></span><span class="k">成</span><span class="w"></span><span class="n">测试</span><span class="w"></span><span class="k">值</span><span class="w"></span><span class="p">(</span><span class="mi">2147483648</span><span class="n">l</span><span class="p">);</span><span class="w"></span><span class="w"></span><span class="n">错误</span><span class="p">:</span><span class="w"></span><span class="n">铸造</span><span class="w"></span><span class="mi">2147483648</span><span class="w"></span><span class="k">来</span><span class="w"></span><span class="nb">int</span><span class="w"></span><span class="n">原因</span><span class="w"></span><span class="n">溢出</span><span class="w"></span></pre> </div> </div> </div> <div class="section" id="type-coercion"> <h2>强制类型转换<一个class="headerlink" href="//www.neidfyre.com/docs/spark/latest/spark-sql/language-manual/#type-coercion" title=""></a></h2> <div class="section" id="type-promotion-and-precedence"> <h3>促销类型和优先级<一个class="headerlink" href="//www.neidfyre.com/docs/spark/latest/spark-sql/language-manual/#type-promotion-and-precedence" title=""></a></h3> <p>当<code class="docutils literal notranslate"><span class="pre">spark.sql.ansi.enabled</span></code>被设置为<code class="docutils literal notranslate"><span class="pre">真正的</span></code>,火花SQL使用几个规则管理数据类型之间的冲突如何解决。这个冲突解决的核心类型优先级列表定义是否一个给定的数据类型的值可以被提升到另一个数据类型隐式。</p> <table class="docutils align-default"> <colgroup> <col style="width: 13%"> <col style="width: 87%"> </colgroup> <thead> <tr class="row-odd"> <th class="head"><p>数据类型</p></th> <th class="head"><p>优先级列表(从窄到宽)</p></th> </tr> </thead> <tbody> <tr class="row-even"> <td><p>字节</p></td> <td><p>字节Int - >短- > - > - >长十进制- > * - >双浮动</p></td> </tr> <tr class="row-odd"> <td><p>短</p></td> <td><p>短Int - > - > - >长十进制- > * - >双浮动</p></td> </tr> <tr class="row-even"> <td><p>Int</p></td> <td><p>Int - > - >长十进制- > * - >双浮动</p></td> </tr> <tr class="row-odd"> <td><p>长</p></td> <td><p>长- >十进制- > * - >双浮动</p></td> </tr> <tr class="row-even"> <td><p>小数</p></td> <td><p>十进制- > * - >双浮动</p></td> </tr> <tr class="row-odd"> <td><p>浮动</p></td> <td><p>浮- >双</p></td> </tr> <tr class="row-even"> <td><p>双</p></td> <td><p>双</p></td> </tr> <tr class="row-odd"> <td><p>日期</p></td> <td><p>- >日期时间戳</p></td> </tr> <tr class="row-even"> <td><p>时间戳</p></td> <td><p>时间戳</p></td> </tr> <tr class="row-odd"> <td><p>字符串</p></td> <td><p>字符串</p></td> </tr> <tr class="row-even"> <td><p>二进制</p></td> <td><p>二进制</p></td> </tr> <tr class="row-odd"> <td><p>布尔</p></td> <td><p>布尔</p></td> </tr> <tr class="row-even"> <td><p>时间间隔</p></td> <td><p>时间间隔</p></td> </tr> <tr class="row-odd"> <td><p>地图</p></td> <td><p>图* *</p></td> </tr> <tr class="row-even"> <td><p>数组</p></td> <td><p>数组* *</p></td> </tr> <tr class="row-odd"> <td><p>结构体</p></td> <td><p>结构体* *</p></td> </tr> </tbody> </table> <p>*最常见解决浮动跳过避免精度的损失。</p> <p>* *一个复杂类型,优先规则递归地适用于它的组成元素。</p> <p>特殊规则申请字符串类型和无类型为空。空可以晋升为其他类型,虽然一个字符串可以推广到任何简单数据类型。</p> <p>这是一个图形化描述的优先级列表作为指导树:<我mg alt="优先规则的图形表示形式" src="//www.neidfyre.com/docs/spark/latest/_images/data-type-precedence.png"></p> </div> <div class="section" id="least-common-type-resolution"> <h3>最常见的决议<一个class="headerlink" href="//www.neidfyre.com/docs/spark/latest/spark-sql/language-manual/#least-common-type-resolution" title=""></a></h3> <p>最常见的类型是最窄的类型可以从优先级列表的所有元素的集合类型。</p> <p>最常见的决议是用来:</p> <ul class="simple"> <li><p>决定是否期望函数的参数类型可以使用一个窄的类型的参数调用。</p></li> <li><p>推导出函数的参数类型,期望一个共享的参数类型为多个参数,如合并、最小或最大。</p></li> <li><p>推导出操作数类型运营商如算术运算或比较。</p></li> <li><p>获得结果的类型等表情表达的情况。</p></li> <li><p>推导出元素、键或值类型数组和地图构造函数。</p></li> </ul> <p>特殊规则应用如果最常见解决浮动。浮子式的值,如果任何类型是INT,长整型数字或十进制最常见的类型是推到避免潜在损失数字的两倍。</p> <div class="highlight-sql notranslate"> <div class="highlight"> <pre><span></span><span class="c1">——合并函数接受任意设定的参数类型,只要他们共享一个最常见的类型。</span><span class="c1">——结果类型是最常见的一种参数。</span><span class="o">></span><span class="w"></span><span class="k">集</span><span class="w"></span><span class="n">火花</span><span class="p">。</span><span class="k">sql</span><span class="p">。</span><span class="n">ansi</span><span class="p">。</span><span class="n">启用</span><span class="o">=</span><span class="k">真正的</span><span class="p">;</span><span class="w"></span><span class="o">></span><span class="w"></span><span class="k">选择</span><span class="w"></span><span class="n">typeof</span><span class="p">(</span><span class="k">合并</span><span class="p">(</span><span class="mi">1</span><span class="n">Y</span><span class="p">,</span><span class="w"></span><span class="mi">1</span><span class="n">l</span><span class="p">,</span><span class="w"></span><span class="k">零</span><span class="p">));</span><span class="w"></span><span class="nb">长整型数字</span><span class="w"></span><span class="o">></span><span class="w"></span><span class="k">选择</span><span class="w"></span><span class="n">typeof</span><span class="p">(</span><span class="k">合并</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span><span class="w"></span><span class="nb">日期</span><span class="s1">“2020-01-01”</span><span class="p">));</span><span class="w"></span><span class="n">错误</span><span class="p">:</span><span class="w"></span><span class="n">不兼容的</span><span class="w"></span><span class="n">类型</span><span class="w"></span><span class="p">(</span><span class="nb">INT</span><span class="p">,</span><span class="w"></span><span class="nb">日期</span><span class="p">]</span><span class="w"></span><span class="o">></span><span class="w"></span><span class="k">选择</span><span class="w"></span><span class="n">typeof</span><span class="p">(</span><span class="k">合并</span><span class="p">(</span><span class="nb">数组</span><span class="p">(</span><span class="mi">1</span><span class="n">Y</span><span class="p">),</span><span class="w"></span><span class="nb">数组</span><span class="p">(</span><span class="mi">1</span><span class="n">l</span><span class="p">)));</span><span class="w"></span><span class="nb">数组</span><span class="o"><</span><span class="nb">长整型数字</span><span class="o">></span><span class="w"></span><span class="o">></span><span class="w"></span><span class="k">选择</span><span class="w"></span><span class="n">typeof</span><span class="p">(</span><span class="k">合并</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span><span class="w"></span><span class="mi">1</span><span class="n">F</span><span class="p">));</span><span class="w"></span><span class="n">双</span><span class="w"></span><span class="o">></span><span class="w"></span><span class="k">选择</span><span class="w"></span><span class="n">typeof</span><span class="p">(</span><span class="k">合并</span><span class="p">(</span><span class="mi">1</span><span class="n">l</span><span class="p">,</span><span class="w"></span><span class="mi">1</span><span class="n">F</span><span class="p">));</span><span class="w"></span><span class="n">双</span><span class="w"></span><span class="o">></span><span class="w"></span><span class="k">选择</span><span class="w"></span><span class="p">(</span><span class="n">typeof</span><span class="p">(</span><span class="k">合并</span><span class="p">(</span><span class="mi">1</span><span class="n">双相障碍</span><span class="p">,</span><span class="w"></span><span class="mi">1</span><span class="n">F</span><span class="p">)));</span><span class="w"></span><span class="n">双</span><span class="w"></span><span class="c1">——substring函数预计开始的整型参数和长度参数。</span><span class="o">></span><span class="w"></span><span class="k">选择</span><span class="w"></span><span class="k">子字符串</span><span class="p">(</span><span class="s1">“你好”</span><span class="p">,</span><span class="w"></span><span class="mi">1</span><span class="n">Y</span><span class="p">,</span><span class="w"></span><span class="mi">2</span><span class="p">);</span><span class="w"></span><span class="n">他</span><span class="w"></span><span class="o">></span><span class="w"></span><span class="k">选择</span><span class="w"></span><span class="k">子字符串</span><span class="p">(</span><span class="s1">“你好”</span><span class="p">,</span><span class="w"></span><span class="s1">' 1 '</span><span class="p">,</span><span class="w"></span><span class="mi">2</span><span class="p">);</span><span class="w"></span><span class="n">他</span><span class="w"></span><span class="o">></span><span class="w"></span><span class="k">选择</span><span class="w"></span><span class="k">子字符串</span><span class="p">(</span><span class="s1">“你好”</span><span class="p">,</span><span class="w"></span><span class="mi">1</span><span class="n">l</span><span class="p">,</span><span class="w"></span><span class="mi">2</span><span class="p">);</span><span class="w"></span><span class="n">错误</span><span class="p">:</span><span class="w"></span><span class="n">论点</span><span class="w"></span><span class="mi">2</span><span class="w"></span><span class="n">需要</span><span class="w"></span><span class="n">一个</span><span class="w"></span><span class="nb">INT</span><span class="w"></span><span class="k">类型</span><span class="p">。</span><span class="w"></span><span class="o">></span><span class="w"></span><span class="k">选择</span><span class="w"></span><span class="k">子字符串</span><span class="p">(</span><span class="s1">“你好”</span><span class="p">,</span><span class="w"></span><span class="n">str</span><span class="p">,</span><span class="w"></span><span class="mi">2</span><span class="p">)</span><span class="w"></span><span class="k">从</span><span class="w"></span><span class="k">值</span><span class="p">(</span><span class="k">投</span><span class="p">(</span><span class="s1">' 1 '</span><span class="w"></span><span class="k">作为</span><span class="w"></span><span class="n">字符串</span><span class="p">))</span><span class="w"></span><span class="k">作为</span><span class="w"></span><span class="n">T</span><span class="p">(</span><span class="n">str</span><span class="p">);</span><span class="w"></span><span class="n">错误</span><span class="p">:</span><span class="w"></span><span class="n">论点</span><span class="w"></span><span class="mi">2</span><span class="w"></span><span class="n">需要</span><span class="w"></span><span class="n">一个</span><span class="w"></span><span class="nb">INT</span><span class="w"></span><span class="k">类型</span><span class="p">。</span><span class="w"></span></pre> </div> </div> </div> </div> <div class="section" id="sql-functions"> <h2>SQL函数<一个class="headerlink" href="//www.neidfyre.com/docs/spark/latest/spark-sql/language-manual/#sql-functions" title=""></a></h2> <p>一些SQL函数可以是不同的行为在ANSI模式(<code class="docutils literal notranslate"><span class="pre">spark.sql.ansi.enabled = true</span></code>)。</p> <ul class="simple"> <li><p><code class="docutils literal notranslate"><span class="pre">大小</span></code>:这个函数返回null ANSI下的零输入模式。</p></li> <li><p><code class="docutils literal notranslate"><span class="pre">element_at</span></code>:</p> <ul> <li><p>这个函数抛出<code class="docutils literal notranslate"><span class="pre">ArrayIndexOutOfBoundsException</span></code>如果使用无效的指标。</p></li> <li><p>这个函数抛出<code class="docutils literal notranslate"><span class="pre">NoSuchElementException</span></code>如果映射的关键是不存在的。</p></li> </ul></li> <li><p><code class="docutils literal notranslate"><span class="pre">英语教学</span></code>:这个函数抛出<code class="docutils literal notranslate"><span class="pre">ArrayIndexOutOfBoundsException</span></code>如果使用无效的指标。</p></li> <li><p><code class="docutils literal notranslate"><span class="pre">make_date</span></code>:这个函数失败,如果结果异常日期是无效的。</p></li> <li><p><code class="docutils literal notranslate"><span class="pre">make_timestamp</span></code>:这个函数失败,如果结果异常的时间戳是无效的。</p></li> <li><p><code class="docutils literal notranslate"><span class="pre">make_interval</span></code>:这个函数失败,如果结果异常间隔是无效的。</p></li> <li><p><code class="docutils literal notranslate"><span class="pre">next_day</span></code>:这个函数抛出<code class="docutils literal notranslate"><span class="pre">IllegalArgumentException</span></code>如果没有一个有效的输入的一天。</p></li> <li><p><code class="docutils literal notranslate"><span class="pre">parse_url</span></code>:这个函数抛出<code class="docutils literal notranslate"><span class="pre">IllegalArgumentException</span></code>如果一个输入字符串不是一个有效的url。</p></li> <li><p><code class="docutils literal notranslate"><span class="pre">to_date</span></code>与一个例外:这个函数失败如果输入字符串不能解析,或模式字符串是无效的。</p></li> <li><p><code class="docutils literal notranslate"><span class="pre">to_timestamp</span></code>与一个例外:这个函数失败如果输入字符串不能解析,或模式字符串是无效的。</p></li> <li><p><code class="docutils literal notranslate"><span class="pre">to_unix_timestamp</span></code>与一个例外:这个函数失败如果输入字符串不能解析,或模式字符串是无效的。</p></li> <li><p><code class="docutils literal notranslate"><span class="pre">unix_timestamp</span></code>与一个例外:这个函数失败如果输入字符串不能解析,或模式字符串是无效的。</p></li> </ul> </div> <div class="section" id="sql-operators"> <h2>SQL操作符<一个class="headerlink" href="//www.neidfyre.com/docs/spark/latest/spark-sql/language-manual/#sql-operators" title=""></a></h2> <p>一些SQL操作符可以是不同的行为在ANSI模式(<code class="docutils literal notranslate"><span class="pre">spark.sql.ansi.enabled = true</span></code>)。</p> <ul class="simple"> <li><p><code class="docutils literal notranslate"><span class="pre">array_col(指数)</span></code>:这个操作符扔<code class="docutils literal notranslate"><span class="pre">ArrayIndexOutOfBoundsException</span></code>如果使用无效的指标。</p></li> <li><p><code class="docutils literal notranslate"><span class="pre">map_col(例子)</span></code>:这个操作符扔<code class="docutils literal notranslate"><span class="pre">NoSuchElementException</span></code>如果映射的关键是不存在的。</p></li> <li><p><code class="docutils literal notranslate"><span class="pre">铸造(string_col</span><span class="pre">作为</span><span class="pre">时间戳)</span></code>与一个例外:该操作失败如果输入字符串不能被解析。</p></li> <li><p><code class="docutils literal notranslate"><span class="pre">铸造(string_col</span><span class="pre">作为</span><span class="pre">日期)</span></code>与一个例外:该操作失败如果输入字符串不能被解析。</p></li> </ul> </div> <div class="section" id="useful-functions-for-ansi-mode"> <h2>ANSI模式的有用功能<一个class="headerlink" href="//www.neidfyre.com/docs/spark/latest/spark-sql/language-manual/#useful-functions-for-ansi-mode" title=""></a></h2> <p>当ANSI模式,它为无效的操作就会抛出异常。您可以使用以下SQL函数抑制这样的例外。</p> <ul class="simple"> <li><p><code class="docutils literal notranslate"><span class="pre">try_cast</span></code>:相同<code class="docutils literal notranslate"><span class="pre">投</span></code>,除了它的回报<code class="docutils literal notranslate"><span class="pre">零</span></code>在运行时错误结果而不是抛出异常。</p></li> <li><p><code class="docutils literal notranslate"><span class="pre">try_add</span></code>:添加操作符相同<code class="docutils literal notranslate"><span class="pre">+</span></code>,除了它的回报<code class="docutils literal notranslate"><span class="pre">零</span></code>结果,而不是抛出异常积分价值溢出。</p></li> <li><p><code class="docutils literal notranslate"><span class="pre">try_divide</span></code>:除法操作符相同<code class="docutils literal notranslate"><span class="pre">/</span></code>,除了它的回报<code class="docutils literal notranslate"><span class="pre">零</span></code>结果分0而不是抛出异常。</p></li> </ul> </div> <div class="section" id="sql-keywords"> <h2>SQL关键字<一个class="headerlink" href="//www.neidfyre.com/docs/spark/latest/spark-sql/language-manual/#sql-keywords" title=""></a></h2> <p>当<code class="docutils literal notranslate"><span class="pre">spark.sql.ansi.enabled</span></code>是真的,火花SQL解析器将使用ANSI模式。在这种模式下,火花SQL关键字有两种:</p> <ul class="simple"> <li><p>保留关键字:关键字保留,不能用作标识符表,视图,列,函数,别名等。</p></li> <li><p>要预订关键词:关键词有特殊意义的只有在特定的情况下,可以使用在其他上下文作为标识符。例如,<code class="docutils literal notranslate"><span class="pre">解释</span><span class="pre">选择</span><span class="pre">…</span></code>是一个命令,但是解释可以用作标识符在其他地方。</p></li> </ul> <p>当ANSI模式被禁用,火花SQL关键字有两种:</p> <ul class="simple"> <li><p>一样要预订关键词:定义一个当ANSI模式启用。</p></li> <li><p>Strict-non-reserved关键词:严格的版本要预订关键词,不能用作表别名。</p></li> </ul> <p>默认情况下<code class="docutils literal notranslate"><span class="pre">spark.sql.ansi.enabled</span></code>是假的。</p> <p>下面是一个列表的所有关键词在火花SQL。</p> <table class="docutils align-default"> <colgroup> <col style="width: 22%"> <col style="width: 29%"> <col style="width: 33%"> <col style="width: 16%"> </colgroup> <thead> <tr class="row-odd"> <th class="head"><p>关键字</p></th> <th class="head"><p>火花< br / > ANSI SQL模式</p></th> <th class="head"><p>火花SQL < br / >默认模式</p></th> <th class="head"><p>sql - 2016</p></th> </tr> </thead> <tbody> <tr class="row-even"> <td><p>添加</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>后</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>所有</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>改变</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>总是</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>分析</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>和</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>反</p></td> <td><p>要预订</p></td> <td><p>strict-non-reserved</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>任何</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>存档</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>数组</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>作为</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>ASC</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>在</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>授权</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>之间的</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>这两个</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>桶</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>桶</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>通过</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>缓存</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>级联</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>情况下</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>投</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>改变</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>检查</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>清晰的</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>集群</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>集群</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>CODEGEN</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>核对</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>集合</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>列</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>列</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>评论</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>提交</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>紧凑的</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>件</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>计算</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>连接</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>约束</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>成本</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>创建</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>交叉</p></td> <td><p>保留</p></td> <td><p>strict-non-reserved</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>多维数据集</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>当前的</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>当前日期</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>当前时间</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>CURRENT_TIMESTAMP</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>CURRENT_USER</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>数据</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>数据库</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>数据库</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>一天</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>DBPROPERTIES</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>定义</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>删除</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>分隔</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>DESC</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>描述</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>DFS</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>目录</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>目录</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>截然不同的</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>分发</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>DIV</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>不是一个字</p></td> </tr> <tr class="row-even"> <td><p>下降</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>其他的</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>结束</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>逃避</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>逃了出来</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>除了</p></td> <td><p>保留</p></td> <td><p>strict-non-reserved</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>交换</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>存在</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>解释</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>出口</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>扩展</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>外部</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>提取</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>假</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>获取</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>字段</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>过滤器</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>FILEFORMAT</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>第一个</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>FN</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>后</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>为</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>外国</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>格式</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>格式化</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>从</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>完整的</p></td> <td><p>保留</p></td> <td><p>strict-non-reserved</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>函数</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>功能</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>生成的</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>全球</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>格兰特</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>奖助金</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>集团</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>分组</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>有</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>小时</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>如果</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>不是一个字</p></td> </tr> <tr class="row-even"> <td><p>忽略</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>进口</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>在</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>指数</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>索引</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>内心的</p></td> <td><p>保留</p></td> <td><p>strict-non-reserved</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>INPATH</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>INPUTFORMAT</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>插入</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>相交</p></td> <td><p>保留</p></td> <td><p>strict-non-reserved</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>时间间隔</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>成</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>是</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>项目</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>加入</p></td> <td><p>保留</p></td> <td><p>strict-non-reserved</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>关键</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>键</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>去年</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>横向</p></td> <td><p>保留</p></td> <td><p>strict-non-reserved</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>懒惰的</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>领先的</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>左</p></td> <td><p>保留</p></td> <td><p>strict-non-reserved</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>就像</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>我喜欢</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>限制</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>行</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>列表</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>负载</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>当地的</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>位置</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>锁</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>锁</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>逻辑</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>宏</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>地图</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>匹配</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>合并</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>一分钟</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>-</p></td> <td><p>要预订</p></td> <td><p>strict-non-reserved</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>月</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>MSCK</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>名称空间</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>名称空间</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>自然</p></td> <td><p>保留</p></td> <td><p>strict-non-reserved</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>没有</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>不</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>零</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>零位</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>的</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>在</p></td> <td><p>保留</p></td> <td><p>strict-non-reserved</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>只有</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>选项</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>选项</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>或</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>订单</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>出</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>外</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>OUTPUTFORMAT</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>在</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>重叠</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>覆盖</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>覆盖</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>分区</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>分区</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>分区</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>百分比</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>主</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>放置</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>位置</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>前</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>主</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>校长</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>属性</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>清洗</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>有资格</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>查询</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>范围</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>收件人</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>收件人</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>RECORDREADER</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>RECORDWRITER</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>恢复</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>减少</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>引用</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>刷新</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>正则表达式</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>不是一个字</p></td> </tr> <tr class="row-even"> <td><p>删除</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>重命名</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>修复</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>取代</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>重置</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>尊重</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>限制</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>撤销</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>正确的</p></td> <td><p>保留</p></td> <td><p>strict-non-reserved</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>RLIKE</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>角色</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>角色</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>回滚</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>汇总</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>行</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>行</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>模式</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>模式</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>不是一个字</p></td> </tr> <tr class="row-even"> <td><p>第二个</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>选择</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>半</p></td> <td><p>要预订</p></td> <td><p>strict-non-reserved</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>分离</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>SERDE</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>SERDEPROPERTIES</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>为SESSION_USER</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>集</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>集</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>分享</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>股票</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>显示</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>倾斜</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>一些</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>排序</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>排序</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>开始</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>统计数据</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>存储</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>分层</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>结构体</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>字符串的子串</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>子字符串</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>同步</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>表</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>表</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>TABLESAMPLE</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>TBLPROPERTIES</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>临时</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>不是一个字</p></td> </tr> <tr class="row-odd"> <td><p>临时</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>终止</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>然后</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>时间</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>来</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>触摸</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>落后于</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>事务</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>交易</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>变换</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>修剪</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>真正的</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>截断</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>TRY_CAST</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>类型</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>UNARCHIVE</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>无限</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>UNCACHE</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>联盟</p></td> <td><p>保留</p></td> <td><p>strict-non-reserved</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>独特的</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>未知的</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>解锁</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>设置</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>更新</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>使用</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>用户</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>使用</p></td> <td><p>保留</p></td> <td><p>strict-non-reserved</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>值</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>视图</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>的观点</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-odd"> <td><p>当</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>在哪里</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>窗口</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-even"> <td><p>与</p></td> <td><p>保留</p></td> <td><p>要预订</p></td> <td><p>保留</p></td> </tr> <tr class="row-odd"> <td><p>一年</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> <tr class="row-even"> <td><p>区</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> <td><p>要预订</p></td> </tr> </tbody> </table> <p></p> <p></p> <p></p> <p></p> <p></p> <p></p> <p></p> <p></p> <p></p> <p></p> <p></p> <p></p> </div> </div> </div> </div> <div class="suapp-rating"> <div id="suPageRateApp"> <su-app></su-app> 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