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<div class="title">ExprSubstitutionMap.java</div> </div>
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<a href="ExprSubstitutionMap_8java.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>&#160;<span class="keyword">package </span>com.cloudera.impala.analysis;</div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;</div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="keyword">import</span> java.util.List;</div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;</div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="keyword">import</span> org.slf4j.Logger;</div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;<span class="keyword">import</span> org.slf4j.LoggerFactory;</div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;</div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;<span class="keyword">import</span> com.google.common.base.Joiner;</div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="keyword">import</span> com.google.common.base.Preconditions;</div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;<span class="keyword">import</span> com.google.common.collect.Lists;</div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;</div>
<div class="line"><a name="l00020"></a><span class="lineno"><a class="line" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html"> 20</a></span>&#160;<span class="keyword">public</span> <span class="keyword">final</span> <span class="keyword">class </span><a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html">ExprSubstitutionMap</a> {</div>
<div class="line"><a name="l00021"></a><span class="lineno"><a class="line" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#a81cacf4c2986d4c6dbd711ee48840192"> 21</a></span>&#160; <span class="keyword">private</span> <span class="keyword">final</span> <span class="keyword">static</span> Logger <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#a81cacf4c2986d4c6dbd711ee48840192">LOG</a> = LoggerFactory.getLogger(ExprSubstitutionMap.class);</div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160;</div>
<div class="line"><a name="l00023"></a><span class="lineno"><a class="line" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#ad6b75528c78285a8eb34412b30e0c32e"> 23</a></span>&#160; <span class="keyword">private</span> List&lt;Expr&gt; <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#ad6b75528c78285a8eb34412b30e0c32e">lhs_</a>; <span class="comment">// left-hand side</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"><a class="line" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#ab54bfba98c53ca83d02a1ba7e0ad672d"> 24</a></span>&#160; <span class="keyword">private</span> List&lt;Expr&gt; <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#ab54bfba98c53ca83d02a1ba7e0ad672d">rhs_</a>; <span class="comment">// right-hand side</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160;</div>
<div class="line"><a name="l00026"></a><span class="lineno"><a class="line" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#af0515361f98e2231b825baf84c99c82d"> 26</a></span>&#160; <span class="keyword">public</span> <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#af0515361f98e2231b825baf84c99c82d">ExprSubstitutionMap</a>() {</div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160; <span class="keyword">this</span>(Lists.&lt;<a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1Expr.html">Expr</a>&gt;newArrayList(), Lists.&lt;<a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1Expr.html">Expr</a>&gt;newArrayList());</div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160; }</div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;</div>
<div class="line"><a name="l00030"></a><span class="lineno"><a class="line" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#a74bfe40cd8cfcfc6534591dc33c492dd"> 30</a></span>&#160; <span class="keyword">public</span> <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#a74bfe40cd8cfcfc6534591dc33c492dd">ExprSubstitutionMap</a>(List&lt;Expr&gt; lhs, List&lt;Expr&gt; rhs) {</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160; <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#ad6b75528c78285a8eb34412b30e0c32e">lhs_</a> = lhs;</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160; <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#ab54bfba98c53ca83d02a1ba7e0ad672d">rhs_</a> = rhs;</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160; }</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160;</div>
<div class="line"><a name="l00039"></a><span class="lineno"><a class="line" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#a30d82a05c2eeb813987f1b3e64d6ce35"> 39</a></span>&#160; <span class="keyword">public</span> <span class="keywordtype">void</span> <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#a30d82a05c2eeb813987f1b3e64d6ce35">put</a>(<a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1Expr.html">Expr</a> lhsExpr, <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1Expr.html">Expr</a> rhsExpr) {</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160; Preconditions.checkState(rhsExpr.isAnalyzed_, <span class="stringliteral">&quot;Rhs expr must be analyzed.&quot;</span>);</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160; lhs_.add(lhsExpr);</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160; rhs_.add(rhsExpr);</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160; }</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160;</div>
<div class="line"><a name="l00048"></a><span class="lineno"><a class="line" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#aa83899031f82e1e725f3b5f7439618f7"> 48</a></span>&#160; <span class="keyword">public</span> <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1Expr.html">Expr</a> <span class="keyword">get</span>(<a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1Expr.html">Expr</a> lhsExpr) {</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; lhs_.size(); ++i) {</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160; <span class="keywordflow">if</span> (lhsExpr.equals(<a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#ad6b75528c78285a8eb34412b30e0c32e">lhs_</a>.get(i))) <span class="keywordflow">return</span> rhs_.get(i);</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160; }</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160; <span class="keywordflow">return</span> null;</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; }</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160;</div>
<div class="line"><a name="l00058"></a><span class="lineno"><a class="line" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#a5dd357f2f6e060e182cc7c19bccc016f"> 58</a></span>&#160; <span class="keyword">public</span> <span class="keywordtype">boolean</span> <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#a5dd357f2f6e060e182cc7c19bccc016f">containsMappingFor</a>(<a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1Expr.html">Expr</a> lhsExpr) {</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160; <span class="keywordflow">return</span> lhs_.contains(lhsExpr);</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160; }</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160;</div>
<div class="line"><a name="l00067"></a><span class="lineno"><a class="line" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#a98efce03ac196880ee0ecae1db1d4a06"> 67</a></span>&#160; <span class="keyword">public</span> <span class="keyword">static</span> <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html">ExprSubstitutionMap</a> <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#a98efce03ac196880ee0ecae1db1d4a06">compose</a>(<a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html">ExprSubstitutionMap</a> f, <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html">ExprSubstitutionMap</a> g,</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160; <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1Analyzer.html">Analyzer</a> analyzer) {</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160; <span class="keywordflow">if</span> (f == null &amp;&amp; g == null) <span class="keywordflow">return</span> <span class="keyword">new</span> <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#af0515361f98e2231b825baf84c99c82d">ExprSubstitutionMap</a>();</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160; <span class="keywordflow">if</span> (f == null) <span class="keywordflow">return</span> g;</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160; <span class="keywordflow">if</span> (g == null) <span class="keywordflow">return</span> f;</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160; <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html">ExprSubstitutionMap</a> result = <span class="keyword">new</span> <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#af0515361f98e2231b825baf84c99c82d">ExprSubstitutionMap</a>();</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160; <span class="comment">// f&#39;s substitution targets need to be substituted via g</span></div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160; result.lhs_ = Expr.cloneList(f.lhs_);</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160; result.rhs_ = Expr.substituteList(f.rhs_, g, analyzer, <span class="keyword">false</span>);</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160;</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160; <span class="comment">// substitution maps are cumulative: the combined map contains all</span></div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; <span class="comment">// substitutions from f and g.</span></div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; g.lhs_.size(); i++) {</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160; <span class="comment">// If f contains expr1-&gt;fn(expr2) and g contains expr2-&gt;expr3,</span></div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160; <span class="comment">// then result must contain expr1-&gt;fn(expr3).</span></div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160; <span class="comment">// The check before adding to result.lhs is to ensure that cases</span></div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160; <span class="comment">// where expr2.equals(expr1) are handled correctly.</span></div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; <span class="comment">// For example f: count(*) -&gt; zeroifnull(count(*))</span></div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160; <span class="comment">// and g: count(*) -&gt; slotref</span></div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160; <span class="comment">// result.lhs must only have: count(*) -&gt; zeroifnull(slotref) from f above,</span></div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; <span class="comment">// and not count(*) -&gt; slotref from g as well.</span></div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160; <span class="keywordflow">if</span> (!result.<a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#ad6b75528c78285a8eb34412b30e0c32e">lhs_</a>.contains(g.lhs_.get(i))) {</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160; result.lhs_.add(g.lhs_.get(i).clone());</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160; result.rhs_.add(g.rhs_.get(i).clone());</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160; }</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; }</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160;</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160; result.verify();</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160; <span class="keywordflow">return</span> result;</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160; }</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160;</div>
<div class="line"><a name="l00101"></a><span class="lineno"><a class="line" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#a32ed43bc78108fc09194542cf7d5d804"> 101</a></span>&#160; <span class="keyword">public</span> <span class="keyword">static</span> <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html">ExprSubstitutionMap</a> <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#a32ed43bc78108fc09194542cf7d5d804">combine</a>(<a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html">ExprSubstitutionMap</a> f,</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160; <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html">ExprSubstitutionMap</a> g) {</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160; <span class="keywordflow">if</span> (f == null &amp;&amp; g == null) <span class="keywordflow">return</span> <span class="keyword">new</span> <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#af0515361f98e2231b825baf84c99c82d">ExprSubstitutionMap</a>();</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160; <span class="keywordflow">if</span> (f == null) <span class="keywordflow">return</span> g;</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160; <span class="keywordflow">if</span> (g == null) <span class="keywordflow">return</span> f;</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160; <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html">ExprSubstitutionMap</a> result = <span class="keyword">new</span> <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#af0515361f98e2231b825baf84c99c82d">ExprSubstitutionMap</a>();</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160; result.lhs_ = Lists.newArrayList(f.lhs_);</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>&#160; result.lhs_.addAll(g.lhs_);</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160; result.rhs_ = Lists.newArrayList(f.rhs_);</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>&#160; result.rhs_.addAll(g.rhs_);</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>&#160; result.verify();</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>&#160; <span class="keywordflow">return</span> result;</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>&#160; }</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>&#160;</div>
<div class="line"><a name="l00115"></a><span class="lineno"><a class="line" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#a44a200ba644306b11caa9a2556a928bb"> 115</a></span>&#160; <span class="keyword">public</span> <span class="keywordtype">void</span> <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#a44a200ba644306b11caa9a2556a928bb">substituteLhs</a>(<a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html">ExprSubstitutionMap</a> lhsSmap, <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1Analyzer.html">Analyzer</a> analyzer) {</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>&#160; <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#ad6b75528c78285a8eb34412b30e0c32e">lhs_</a> = Expr.substituteList(<a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#ad6b75528c78285a8eb34412b30e0c32e">lhs_</a>, lhsSmap, analyzer, <span class="keyword">false</span>);</div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>&#160; }</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>&#160;</div>
<div class="line"><a name="l00119"></a><span class="lineno"><a class="line" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#a4b8de9b2ea132359d115ee0c46e72c0d"> 119</a></span>&#160; <span class="keyword">public</span> List&lt;Expr&gt; <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#a4b8de9b2ea132359d115ee0c46e72c0d">getLhs</a>() { <span class="keywordflow">return</span> <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#ad6b75528c78285a8eb34412b30e0c32e">lhs_</a>; }</div>
<div class="line"><a name="l00120"></a><span class="lineno"><a class="line" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#af6a8ccae122c99d7b6a2848be97d88b6"> 120</a></span>&#160; <span class="keyword">public</span> List&lt;Expr&gt; <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#af6a8ccae122c99d7b6a2848be97d88b6">getRhs</a>() { <span class="keywordflow">return</span> <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#ab54bfba98c53ca83d02a1ba7e0ad672d">rhs_</a>; }</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160;</div>
<div class="line"><a name="l00122"></a><span class="lineno"><a class="line" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#a88603035beeb1b95cd689ab3648a35fa"> 122</a></span>&#160; <span class="keyword">public</span> <span class="keywordtype">int</span> <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#a88603035beeb1b95cd689ab3648a35fa">size</a>() { <span class="keywordflow">return</span> lhs_.size(); }</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>&#160;</div>
<div class="line"><a name="l00124"></a><span class="lineno"><a class="line" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#a932591160077aa09d761be2b1518ea42"> 124</a></span>&#160; <span class="keyword">public</span> String <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#a932591160077aa09d761be2b1518ea42">debugString</a>() {</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>&#160; Preconditions.checkState(lhs_.size() == <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#ab54bfba98c53ca83d02a1ba7e0ad672d">rhs_</a>.size());</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>&#160; List&lt;String&gt; output = Lists.newArrayList();</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; lhs_.size(); ++i) {</div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>&#160; output.add(lhs_.get(i).toSql() + <span class="stringliteral">&quot;:&quot;</span> + rhs_.get(i).toSql());</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>&#160; output.add(<span class="stringliteral">&quot;(&quot;</span> + lhs_.get(i).<a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#a932591160077aa09d761be2b1518ea42">debugString</a>() + <span class="stringliteral">&quot;:&quot;</span> + rhs_.get(i).<a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#a932591160077aa09d761be2b1518ea42">debugString</a>() + <span class="stringliteral">&quot;)&quot;</span>);</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>&#160; }</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>&#160; <span class="keywordflow">return</span> <span class="stringliteral">&quot;smap(&quot;</span> + Joiner.on(<span class="stringliteral">&quot; &quot;</span>).join(output) + <span class="stringliteral">&quot;)&quot;</span>;</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>&#160; }</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>&#160;</div>
<div class="line"><a name="l00138"></a><span class="lineno"><a class="line" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#af8b791b2a422bab68f45b64457fac639"> 138</a></span>&#160; <span class="keyword">private</span> <span class="keywordtype">void</span> <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#af8b791b2a422bab68f45b64457fac639">verify</a>() {</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; lhs_.size(); ++i) {</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = i + 1; j &lt; lhs_.size(); ++j) {</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>&#160; <span class="keywordflow">if</span> (<a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#ad6b75528c78285a8eb34412b30e0c32e">lhs_</a>.get(i).equals(lhs_.get(j))) {</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>&#160; LOG.info(<span class="stringliteral">&quot;verify: smap=&quot;</span> + this.debugString());</div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>&#160; Preconditions.checkState(<span class="keyword">false</span>);</div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>&#160; }</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>&#160; }</div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>&#160; Preconditions.checkState(rhs_.get(i).isAnalyzed_);</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>&#160; }</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>&#160; }</div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>&#160;</div>
<div class="line"><a name="l00150"></a><span class="lineno"><a class="line" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#aced363f97ca7a05587dd912fe9e06653"> 150</a></span>&#160; <span class="keyword">public</span> <span class="keywordtype">void</span> <a class="code" href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#aced363f97ca7a05587dd912fe9e06653">clear</a>() {</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>&#160; lhs_.clear();</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>&#160; rhs_.clear();</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>&#160; }</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>&#160;}</div>
<div class="ttc" id="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap_html_a4b8de9b2ea132359d115ee0c46e72c0d"><div class="ttname"><a href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#a4b8de9b2ea132359d115ee0c46e72c0d">com.cloudera.impala.analysis.ExprSubstitutionMap.getLhs</a></div><div class="ttdeci">List&lt; Expr &gt; getLhs()</div><div class="ttdef"><b>Definition:</b> <a href="ExprSubstitutionMap_8java_source.html#l00119">ExprSubstitutionMap.java:119</a></div></div>
<div class="ttc" id="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap_html_a932591160077aa09d761be2b1518ea42"><div class="ttname"><a href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#a932591160077aa09d761be2b1518ea42">com.cloudera.impala.analysis.ExprSubstitutionMap.debugString</a></div><div class="ttdeci">String debugString()</div><div class="ttdef"><b>Definition:</b> <a href="ExprSubstitutionMap_8java_source.html#l00124">ExprSubstitutionMap.java:124</a></div></div>
<div class="ttc" id="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap_html_a74bfe40cd8cfcfc6534591dc33c492dd"><div class="ttname"><a href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#a74bfe40cd8cfcfc6534591dc33c492dd">com.cloudera.impala.analysis.ExprSubstitutionMap.ExprSubstitutionMap</a></div><div class="ttdeci">ExprSubstitutionMap(List&lt; Expr &gt; lhs, List&lt; Expr &gt; rhs)</div><div class="ttdef"><b>Definition:</b> <a href="ExprSubstitutionMap_8java_source.html#l00030">ExprSubstitutionMap.java:30</a></div></div>
<div class="ttc" id="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap_html_ad6b75528c78285a8eb34412b30e0c32e"><div class="ttname"><a href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#ad6b75528c78285a8eb34412b30e0c32e">com.cloudera.impala.analysis.ExprSubstitutionMap.lhs_</a></div><div class="ttdeci">List&lt; Expr &gt; lhs_</div><div class="ttdef"><b>Definition:</b> <a href="ExprSubstitutionMap_8java_source.html#l00023">ExprSubstitutionMap.java:23</a></div></div>
<div class="ttc" id="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap_html_a5dd357f2f6e060e182cc7c19bccc016f"><div class="ttname"><a href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#a5dd357f2f6e060e182cc7c19bccc016f">com.cloudera.impala.analysis.ExprSubstitutionMap.containsMappingFor</a></div><div class="ttdeci">boolean containsMappingFor(Expr lhsExpr)</div><div class="ttdef"><b>Definition:</b> <a href="ExprSubstitutionMap_8java_source.html#l00058">ExprSubstitutionMap.java:58</a></div></div>
<div class="ttc" id="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap_html_a81cacf4c2986d4c6dbd711ee48840192"><div class="ttname"><a href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#a81cacf4c2986d4c6dbd711ee48840192">com.cloudera.impala.analysis.ExprSubstitutionMap.LOG</a></div><div class="ttdeci">static final Logger LOG</div><div class="ttdef"><b>Definition:</b> <a href="ExprSubstitutionMap_8java_source.html#l00021">ExprSubstitutionMap.java:21</a></div></div>
<div class="ttc" id="classcom_1_1cloudera_1_1impala_1_1analysis_1_1Expr_html"><div class="ttname"><a href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1Expr.html">com.cloudera.impala.analysis.Expr</a></div><div class="ttdef"><b>Definition:</b> <a href="Expr_8java_source.html#l00048">Expr.java:48</a></div></div>
<div class="ttc" id="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap_html_af6a8ccae122c99d7b6a2848be97d88b6"><div class="ttname"><a href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#af6a8ccae122c99d7b6a2848be97d88b6">com.cloudera.impala.analysis.ExprSubstitutionMap.getRhs</a></div><div class="ttdeci">List&lt; Expr &gt; getRhs()</div><div class="ttdef"><b>Definition:</b> <a href="ExprSubstitutionMap_8java_source.html#l00120">ExprSubstitutionMap.java:120</a></div></div>
<div class="ttc" id="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap_html_a44a200ba644306b11caa9a2556a928bb"><div class="ttname"><a href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#a44a200ba644306b11caa9a2556a928bb">com.cloudera.impala.analysis.ExprSubstitutionMap.substituteLhs</a></div><div class="ttdeci">void substituteLhs(ExprSubstitutionMap lhsSmap, Analyzer analyzer)</div><div class="ttdef"><b>Definition:</b> <a href="ExprSubstitutionMap_8java_source.html#l00115">ExprSubstitutionMap.java:115</a></div></div>
<div class="ttc" id="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap_html_a30d82a05c2eeb813987f1b3e64d6ce35"><div class="ttname"><a href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#a30d82a05c2eeb813987f1b3e64d6ce35">com.cloudera.impala.analysis.ExprSubstitutionMap.put</a></div><div class="ttdeci">void put(Expr lhsExpr, Expr rhsExpr)</div><div class="ttdef"><b>Definition:</b> <a href="ExprSubstitutionMap_8java_source.html#l00039">ExprSubstitutionMap.java:39</a></div></div>
<div class="ttc" id="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap_html_a32ed43bc78108fc09194542cf7d5d804"><div class="ttname"><a href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#a32ed43bc78108fc09194542cf7d5d804">com.cloudera.impala.analysis.ExprSubstitutionMap.combine</a></div><div class="ttdeci">static ExprSubstitutionMap combine(ExprSubstitutionMap f, ExprSubstitutionMap g)</div><div class="ttdef"><b>Definition:</b> <a href="ExprSubstitutionMap_8java_source.html#l00101">ExprSubstitutionMap.java:101</a></div></div>
<div class="ttc" id="classcom_1_1cloudera_1_1impala_1_1analysis_1_1Analyzer_html"><div class="ttname"><a href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1Analyzer.html">com.cloudera.impala.analysis.Analyzer</a></div><div class="ttdef"><b>Definition:</b> <a href="Analyzer_8java_source.html#l00105">Analyzer.java:105</a></div></div>
<div class="ttc" id="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap_html_a98efce03ac196880ee0ecae1db1d4a06"><div class="ttname"><a href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#a98efce03ac196880ee0ecae1db1d4a06">com.cloudera.impala.analysis.ExprSubstitutionMap.compose</a></div><div class="ttdeci">static ExprSubstitutionMap compose(ExprSubstitutionMap f, ExprSubstitutionMap g, Analyzer analyzer)</div><div class="ttdef"><b>Definition:</b> <a href="ExprSubstitutionMap_8java_source.html#l00067">ExprSubstitutionMap.java:67</a></div></div>
<div class="ttc" id="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap_html_aced363f97ca7a05587dd912fe9e06653"><div class="ttname"><a href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#aced363f97ca7a05587dd912fe9e06653">com.cloudera.impala.analysis.ExprSubstitutionMap.clear</a></div><div class="ttdeci">void clear()</div><div class="ttdef"><b>Definition:</b> <a href="ExprSubstitutionMap_8java_source.html#l00150">ExprSubstitutionMap.java:150</a></div></div>
<div class="ttc" id="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap_html_a88603035beeb1b95cd689ab3648a35fa"><div class="ttname"><a href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#a88603035beeb1b95cd689ab3648a35fa">com.cloudera.impala.analysis.ExprSubstitutionMap.size</a></div><div class="ttdeci">int size()</div><div class="ttdef"><b>Definition:</b> <a href="ExprSubstitutionMap_8java_source.html#l00122">ExprSubstitutionMap.java:122</a></div></div>
<div class="ttc" id="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap_html_af0515361f98e2231b825baf84c99c82d"><div class="ttname"><a href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#af0515361f98e2231b825baf84c99c82d">com.cloudera.impala.analysis.ExprSubstitutionMap.ExprSubstitutionMap</a></div><div class="ttdeci">ExprSubstitutionMap()</div><div class="ttdef"><b>Definition:</b> <a href="ExprSubstitutionMap_8java_source.html#l00026">ExprSubstitutionMap.java:26</a></div></div>
<div class="ttc" id="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap_html"><div class="ttname"><a href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html">com.cloudera.impala.analysis.ExprSubstitutionMap</a></div><div class="ttdef"><b>Definition:</b> <a href="ExprSubstitutionMap_8java_source.html#l00020">ExprSubstitutionMap.java:20</a></div></div>
<div class="ttc" id="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap_html_af8b791b2a422bab68f45b64457fac639"><div class="ttname"><a href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#af8b791b2a422bab68f45b64457fac639">com.cloudera.impala.analysis.ExprSubstitutionMap.verify</a></div><div class="ttdeci">void verify()</div><div class="ttdef"><b>Definition:</b> <a href="ExprSubstitutionMap_8java_source.html#l00138">ExprSubstitutionMap.java:138</a></div></div>
<div class="ttc" id="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap_html_ab54bfba98c53ca83d02a1ba7e0ad672d"><div class="ttname"><a href="classcom_1_1cloudera_1_1impala_1_1analysis_1_1ExprSubstitutionMap.html#ab54bfba98c53ca83d02a1ba7e0ad672d">com.cloudera.impala.analysis.ExprSubstitutionMap.rhs_</a></div><div class="ttdeci">List&lt; Expr &gt; rhs_</div><div class="ttdef"><b>Definition:</b> <a href="ExprSubstitutionMap_8java_source.html#l00024">ExprSubstitutionMap.java:24</a></div></div>
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