| <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> |
| <html xmlns="http://www.w3.org/1999/xhtml"> |
| <head> |
| <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> |
| <meta http-equiv="X-UA-Compatible" content="IE=9"/> |
| <meta name="generator" content="Doxygen 1.8.4"/> |
| <title>MADlib: compatibility.sql_in Source File</title> |
| <link href="tabs.css" rel="stylesheet" type="text/css"/> |
| <script type="text/javascript" src="jquery.js"></script> |
| <script type="text/javascript" src="dynsections.js"></script> |
| <link href="navtree.css" rel="stylesheet" type="text/css"/> |
| <script type="text/javascript" src="resize.js"></script> |
| <script type="text/javascript" src="navtree.js"></script> |
| <script type="text/javascript"> |
| $(document).ready(initResizable); |
| $(window).load(resizeHeight); |
| </script> |
| <link href="search/search.css" rel="stylesheet" type="text/css"/> |
| <script type="text/javascript" src="search/search.js"></script> |
| <script type="text/javascript"> |
| $(document).ready(function() { searchBox.OnSelectItem(0); }); |
| </script> |
| <script type="text/x-mathjax-config"> |
| MathJax.Hub.Config({ |
| extensions: ["tex2jax.js", "TeX/AMSmath.js", "TeX/AMSsymbols.js"], |
| jax: ["input/TeX","output/HTML-CSS"], |
| }); |
| </script><script src="../mathjax/MathJax.js"></script> |
| <link href="doxygen.css" rel="stylesheet" type="text/css" /> |
| </head> |
| <body> |
| <div id="top"><!-- do not remove this div, it is closed by doxygen! --> |
| <div id="titlearea"> |
| <table cellspacing="0" cellpadding="0"> |
| <tbody> |
| <tr style="height: 56px;"> |
| <td style="padding-left: 0.5em;"> |
| <div id="projectname">MADlib |
|  <span id="projectnumber">1.1</span> <span style="font-size:10pt; font-style:italic"><a href="../latest/./compatibility_8sql__in_source.html"> A newer version is available</a></span> |
| </div> |
| <div id="projectbrief">User Documentation</div> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| <!-- end header part --> |
| <!-- Generated by Doxygen 1.8.4 --> |
| <script type="text/javascript"> |
| var searchBox = new SearchBox("searchBox", "search",false,'Search'); |
| </script> |
| <div id="navrow1" class="tabs"> |
| <ul class="tablist"> |
| <li><a href="index.html"><span>Main Page</span></a></li> |
| <li><a href="modules.html"><span>Modules</span></a></li> |
| <li class="current"><a href="files.html"><span>Files</span></a></li> |
| <li> |
| <div id="MSearchBox" class="MSearchBoxInactive"> |
| <span class="left"> |
| <img id="MSearchSelect" src="search/mag_sel.png" |
| onmouseover="return searchBox.OnSearchSelectShow()" |
| onmouseout="return searchBox.OnSearchSelectHide()" |
| alt=""/> |
| <input type="text" id="MSearchField" value="Search" accesskey="S" |
| onfocus="searchBox.OnSearchFieldFocus(true)" |
| onblur="searchBox.OnSearchFieldFocus(false)" |
| onkeyup="searchBox.OnSearchFieldChange(event)"/> |
| </span><span class="right"> |
| <a id="MSearchClose" href="javascript:searchBox.CloseResultsWindow()"><img id="MSearchCloseImg" border="0" src="search/close.png" alt=""/></a> |
| </span> |
| </div> |
| </li> |
| </ul> |
| </div> |
| <div id="navrow2" class="tabs2"> |
| <ul class="tablist"> |
| <li><a href="files.html"><span>File List</span></a></li> |
| <li><a href="globals.html"><span>File Members</span></a></li> |
| </ul> |
| </div> |
| </div><!-- top --> |
| <div id="side-nav" class="ui-resizable side-nav-resizable"> |
| <div id="nav-tree"> |
| <div id="nav-tree-contents"> |
| <div id="nav-sync" class="sync"></div> |
| </div> |
| </div> |
| <div id="splitbar" style="-moz-user-select:none;" |
| class="ui-resizable-handle"> |
| </div> |
| </div> |
| <script type="text/javascript"> |
| $(document).ready(function(){initNavTree('compatibility_8sql__in_source.html','');}); |
| </script> |
| <div id="doc-content"> |
| <!-- window showing the filter options --> |
| <div id="MSearchSelectWindow" |
| onmouseover="return searchBox.OnSearchSelectShow()" |
| onmouseout="return searchBox.OnSearchSelectHide()" |
| onkeydown="return searchBox.OnSearchSelectKey(event)"> |
| <a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(0)"><span class="SelectionMark"> </span>All</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(1)"><span class="SelectionMark"> </span>Files</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(2)"><span class="SelectionMark"> </span>Functions</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(3)"><span class="SelectionMark"> </span>Groups</a></div> |
| |
| <!-- iframe showing the search results (closed by default) --> |
| <div id="MSearchResultsWindow"> |
| <iframe src="javascript:void(0)" frameborder="0" |
| name="MSearchResults" id="MSearchResults"> |
| </iframe> |
| </div> |
| |
| <div class="header"> |
| <div class="headertitle"> |
| <div class="title">compatibility.sql_in</div> </div> |
| </div><!--header--> |
| <div class="contents"> |
| <a href="compatibility_8sql__in.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/* ----------------------------------------------------------------------- */</span><span class="comment">/**</span></div> |
| <div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * @file compatibility.sql_in</span></div> |
| <div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * @brief Compatibility SQL functions</span></div> |
| <div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * @sa For a brief overview of compatibility functions, see the</span></div> |
| <div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * module description \ref grp_compatibility.</span></div> |
| <div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> */</span><span class="comment">/* ----------------------------------------------------------------------- */</span></div> |
| <div class="line"><a name="l00011"></a><span class="lineno"> 11</span> </div> |
| <div class="line"><a name="l00012"></a><span class="lineno"> 12</span> m4_include(`SQLCommon.m4<span class="stringliteral">')</span></div> |
| <div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="stringliteral">m4_changequote(<!,!>)</span></div> |
| <div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="stringliteral"></span></div> |
| <div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="stringliteral"></span><span class="comment"></span></div> |
| <div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment">/**</span></div> |
| <div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment">@addtogroup grp_compatibility</span></div> |
| <div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment">@about</span></div> |
| <div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment">The compatibility module replicates standard SQL functionality that cannot be</span></div> |
| <div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment">used on all platforms supported by MADlib -- be it due to incomplete</span></div> |
| <div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment">implementation of the SQL standard or bugs.</span></div> |
| <div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment">This module contains workarounds for the following issues:</span></div> |
| <div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment">- <tt>CREATE TABLE <em>table_name</em> AS <em>query</em></tt> statements where</span></div> |
| <div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment"> <em>query</em> contains certain MADlib functions fails with the error</span></div> |
| <div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment"> “function cannot execute on segment because it issues a non-SELECT statement”</span></div> |
| <div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment"> (Greenplum versions before version 4.2, and in rare special cases also later</span></div> |
| <div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment"> versions).</span></div> |
| <div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment"> The workaround is:</span></div> |
| <div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment"> <pre>SELECT \ref create_table_as('<em>table_name</em>', $$</span></div> |
| <div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment"> <em>query</em></span></div> |
| <div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment">$$, 'BY (<em>column</em>, [...]) | RANDOMLY');</pre></span></div> |
| <div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment">- <tt>INSERT INTO <em>table_name</em> <em>query</em></tt> where <em>query</em></span></div> |
| <div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment"> contains certain MADlib functions fails with the error “function cannot</span></div> |
| <div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment"> execute on segment because it issues a non-SELECT statement” (Greenplum</span></div> |
| <div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment"> versions before version 4.2, and in rare special cases also later versions).</span></div> |
| <div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment"> The workaround is:</span></div> |
| <div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment"> <pre>SELECT \ref insert_into('<em>table_name</em>', $$</span></div> |
| <div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"> <em>query</em></span></div> |
| <div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment">$$);</pre></span></div> |
| <div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment">@note</span></div> |
| <div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment">These functions are not needed on PostgreSQL and are usually not needed on</span></div> |
| <div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment">Greenplum 4.2 and later. However, they are always installed for compatibility</span></div> |
| <div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment">with other platforms.</span></div> |
| <div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment">Workarounds should be used only when necessary. For portability and best</span></div> |
| <div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment">performance, standard SQL should be prefered whenever possible.</span></div> |
| <div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment">@literature</span></div> |
| <div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment">[1] Greenplum Admin Guide</span></div> |
| <div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment">@sa File compatibility.sql_in (documenting the SQL functions)</span></div> |
| <div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment">*/</span></div> |
| <div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment">/**</span></div> |
| <div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment"> * @brief Mimick <tt>INSERT INTO</tt>. Create new rows in a table.</span></div> |
| <div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment"> * @param inTableName The name (optionally schema-qualified) of an existing</span></div> |
| <div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment"> * table.</span></div> |
| <div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment"> * @param inSQL A SELECT command.</span></div> |
| <div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="comment"> * @usage</span></div> |
| <div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="comment"> * Use in the same way as the <tt>INSERT INTO</tt> statement:</span></div> |
| <div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="comment"> * <pre>SELECT insert_into('<em>table_name</em>', $$</span></div> |
| <div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="comment"> * <em>query</em></span></div> |
| <div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="comment"> *$$);</pre></span></div> |
| <div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="comment"> * @examp</span></div> |
| <div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="comment"> * <pre>SELECT insert_into('public.test', $$</span></div> |
| <div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="comment"> * SELECT * FROM generate_series(1,10) AS id</span></div> |
| <div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="comment"> *$$);\n</span></div> |
| <div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="comment"> *SELECT insert_into('logregr_results', $$</span></div> |
| <div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="comment"> * SELECT * FROM logregr('data', 'y', 'x')</span></div> |
| <div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="comment"> *$$);</pre></span></div> |
| <div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="comment"> * @note This function is a workaround. For compliance with the SQL standard and</span></div> |
| <div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="comment"> * for optimal performance, please use the normal <tt>INSERT INTO</tt></span></div> |
| <div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="comment"> * statement whenever possible.</span></div> |
| <div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="comment"> * Known caveats of this workaround:</span></div> |
| <div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="comment"> * - For queries returning a large number of rows, this function will be</span></div> |
| <div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="comment"> * significantly slower than the <tt>INSERT INTO</tt> statement.</span></div> |
| <div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="comment"> */</span></div> |
| <div class="line"><a name="l00088"></a><span class="lineno"> 88</span> CREATE FUNCTION MADLIB_SCHEMA.insert_into(</div> |
| <div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  "inTableName" VARCHAR,</div> |
| <div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  "inSQL" VARCHAR)</div> |
| <div class="line"><a name="l00091"></a><span class="lineno"> 91</span> RETURNS VOID</div> |
| <div class="line"><a name="l00092"></a><span class="lineno"> 92</span> LANGUAGE plpgsql</div> |
| <div class="line"><a name="l00093"></a><span class="lineno"> 93</span> VOLATILE</div> |
| <div class="line"><a name="l00094"></a><span class="lineno"> 94</span> RETURNS NULL ON NULL INPUT</div> |
| <div class="line"><a name="l00095"></a><span class="lineno"> 95</span> AS $$</div> |
| <div class="line"><a name="l00096"></a><span class="lineno"> 96</span> DECLARE</div> |
| <div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  oldClientMinMessages VARCHAR;</div> |
| <div class="line"><a name="l00098"></a><span class="lineno"> 98</span> BEGIN</div> |
| <div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  oldClientMinMessages :=</div> |
| <div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  (SELECT setting FROM pg_settings WHERE name = 'client_min_messages<span class="stringliteral">');</span></div> |
| <div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="stringliteral"> EXECUTE '</span>SET client_min_messages TO warning<span class="stringliteral">';</span></div> |
| <div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="stringliteral"></span></div> |
| <div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="stringliteral"> PERFORM MADLIB_SCHEMA.create_schema_pg_temp();</span></div> |
| <div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="stringliteral"></span></div> |
| <div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="stringliteral"> EXECUTE</span></div> |
| <div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="stringliteral"> '</span>DROP FUNCTION IF EXISTS pg_temp._madlib_temp_function();</div> |
| <div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  CREATE FUNCTION pg_temp._madlib_temp_function()</div> |
| <div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  RETURNS VOID</div> |
| <div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  LANGUAGE plpgsql</div> |
| <div class="line"><a name="l00110"></a><span class="lineno"><a class="code" href="compatibility_8sql__in.html#a62af9c8b5618f77beaee1b2e1c411714"> 110</a></span>  AS $_madlib_temp_function$</div> |
| <div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  DECLARE</div> |
| <div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  result <span class="stringliteral">' || "inTableName" || '</span>%ROWTYPE;</div> |
| <div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  BEGIN</div> |
| <div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  FOR result IN EXECUTE</div> |
| <div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  $_madlib_temp_function_string$</div> |
| <div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="stringliteral">' || "inSQL" || '</span></div> |
| <div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  $_madlib_temp_function_string$</div> |
| <div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  LOOP</div> |
| <div class="line"><a name="l00119"></a><span class="lineno"> 119</span> </div> |
| <div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  INSERT INTO <span class="stringliteral">' || "inTableName" || '</span> VALUES (result.*);</div> |
| <div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  END LOOP;</div> |
| <div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  END;</div> |
| <div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  $_madlib_temp_function$<span class="stringliteral">';</span></div> |
| <div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <span class="stringliteral"></span></div> |
| <div class="line"><a name="l00125"></a><span class="lineno"> 125</span> <span class="stringliteral"> -- We call _madlib_temp_function() in a separate</span></div> |
| <div class="line"><a name="l00126"></a><span class="lineno"> 126</span> <span class="stringliteral"> -- EXECUTE statement because it is not yet visible before</span></div> |
| <div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="stringliteral"> -- (we would see "ERROR: function _madlib_temp_function() does not exist")</span></div> |
| <div class="line"><a name="l00128"></a><span class="lineno"> 128</span> <span class="stringliteral"> EXECUTE</span></div> |
| <div class="line"><a name="l00129"></a><span class="lineno"> 129</span> <span class="stringliteral"> '</span>SELECT pg_temp._madlib_temp_function();</div> |
| <div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  SET client_min_messages TO <span class="stringliteral">' || oldClientMinMessages || '</span>;<span class="stringliteral">';</span></div> |
| <div class="line"><a name="l00131"></a><span class="lineno"> 131</span> <span class="stringliteral">END;</span></div> |
| <div class="line"><a name="l00132"></a><span class="lineno"> 132</span> <span class="stringliteral">$$;</span></div> |
| <div class="line"><a name="l00133"></a><span class="lineno"> 133</span> <span class="stringliteral"></span></div> |
| <div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="stringliteral"></span></div> |
| <div class="line"><a name="l00135"></a><span class="lineno"> 135</span> <span class="stringliteral">CREATE FUNCTION MADLIB_SCHEMA.internal_create_table_as(</span></div> |
| <div class="line"><a name="l00136"></a><span class="lineno"> 136</span> <span class="stringliteral"> "inTemporary" BOOLEAN,</span></div> |
| <div class="line"><a name="l00137"></a><span class="lineno"> 137</span> <span class="stringliteral"> "inTableName" VARCHAR,</span></div> |
| <div class="line"><a name="l00138"></a><span class="lineno"> 138</span> <span class="stringliteral"> "inSQL" VARCHAR,</span></div> |
| <div class="line"><a name="l00139"></a><span class="lineno"> 139</span> <span class="stringliteral"> "inDistributed" VARCHAR)</span></div> |
| <div class="line"><a name="l00140"></a><span class="lineno"> 140</span> <span class="stringliteral">RETURNS VOID</span></div> |
| <div class="line"><a name="l00141"></a><span class="lineno"> 141</span> <span class="stringliteral">LANGUAGE plpgsql</span></div> |
| <div class="line"><a name="l00142"></a><span class="lineno"> 142</span> <span class="stringliteral">VOLATILE</span></div> |
| <div class="line"><a name="l00143"></a><span class="lineno"> 143</span> <span class="stringliteral">RETURNS NULL ON NULL INPUT</span></div> |
| <div class="line"><a name="l00144"></a><span class="lineno"> 144</span> <span class="stringliteral">AS $$</span></div> |
| <div class="line"><a name="l00145"></a><span class="lineno"> 145</span> <span class="stringliteral">DECLARE</span></div> |
| <div class="line"><a name="l00146"></a><span class="lineno"> 146</span> <span class="stringliteral"> whatToCreate VARCHAR;</span></div> |
| <div class="line"><a name="l00147"></a><span class="lineno"> 147</span> <span class="stringliteral">BEGIN</span></div> |
| <div class="line"><a name="l00148"></a><span class="lineno"> 148</span> <span class="stringliteral"> IF "inTemporary" = TRUE THEN</span></div> |
| <div class="line"><a name="l00149"></a><span class="lineno"> 149</span> <span class="stringliteral"> whatToCreate := '</span>TEMPORARY TABLE<span class="stringliteral">';</span></div> |
| <div class="line"><a name="l00150"></a><span class="lineno"> 150</span> <span class="stringliteral"> ELSE</span></div> |
| <div class="line"><a name="l00151"></a><span class="lineno"> 151</span> <span class="stringliteral"> whatToCreate := '</span>TABLE<span class="stringliteral">';</span></div> |
| <div class="line"><a name="l00152"></a><span class="lineno"> 152</span> <span class="stringliteral"> END IF;</span></div> |
| <div class="line"><a name="l00153"></a><span class="lineno"> 153</span> <span class="stringliteral"></span></div> |
| <div class="line"><a name="l00154"></a><span class="lineno"> 154</span> <span class="stringliteral"> -- We separate the following EXECUTE statement because it is prone</span></div> |
| <div class="line"><a name="l00155"></a><span class="lineno"> 155</span> <span class="stringliteral"> -- to generate an exception -- e.g., if the table already exists</span></div> |
| <div class="line"><a name="l00156"></a><span class="lineno"> 156</span> <span class="stringliteral"> -- In that case we want to keep the context in the error message short</span></div> |
| <div class="line"><a name="l00157"></a><span class="lineno"> 157</span> <span class="stringliteral"> EXECUTE</span></div> |
| <div class="line"><a name="l00158"></a><span class="lineno"> 158</span> <span class="stringliteral"> '</span>CREATE <span class="stringliteral">' || whatToCreate || '</span> <span class="stringliteral">' || "inTableName" || '</span> AS</div> |
| <div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  SELECT * FROM (<span class="stringliteral">' || "inSQL" || '</span>) AS _madlib_ignore</div> |
| <div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  WHERE FALSE</div> |
| <div class="line"><a name="l00161"></a><span class="lineno"> 161</span> m4_ifdef(<!__GREENPLUM__!>,<!</div> |
| <div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  DISTRIBUTED ' || "inDistributed";</div> |
| <div class="line"><a name="l00163"></a><span class="lineno"> 163</span> !>,<!</div> |
| <div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  ';</div> |
| <div class="line"><a name="l00165"></a><span class="lineno"> 165</span> !>)</div> |
| <div class="line"><a name="l00166"></a><span class="lineno"> 166</span> </div> |
| <div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  PERFORM MADLIB_SCHEMA.<a class="code" href="compatibility_8sql__in.html#a62af9c8b5618f77beaee1b2e1c411714" title="Mimick INSERT INTO. Create new rows in a table. ">insert_into</a>("inTableName", "inSQL");</div> |
| <div class="line"><a name="l00168"></a><span class="lineno"> 168</span> END;</div> |
| <div class="line"><a name="l00169"></a><span class="lineno"> 169</span> $$;</div> |
| <div class="line"><a name="l00170"></a><span class="lineno"> 170</span> </div> |
| <div class="line"><a name="l00171"></a><span class="lineno"> 171</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00172"></a><span class="lineno"> 172</span> <span class="comment">/**</span></div> |
| <div class="line"><a name="l00173"></a><span class="lineno"> 173</span> <span class="comment"> * @brief Mimick <tt>CREATE TABLE AS</tt>. Create a table and fill it with data</span></div> |
| <div class="line"><a name="l00174"></a><span class="lineno"> 174</span> <span class="comment"> * computed by a \c SELECT command.</span></div> |
| <div class="line"><a name="l00175"></a><span class="lineno"> 175</span> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00176"></a><span class="lineno"> 176</span> <span class="comment"> * @param inTableName The name (optionally schema-qualified) of the table to be</span></div> |
| <div class="line"><a name="l00177"></a><span class="lineno"> 177</span> <span class="comment"> * created.</span></div> |
| <div class="line"><a name="l00178"></a><span class="lineno"> 178</span> <span class="comment"> * @param inSQL A SELECT command.</span></div> |
| <div class="line"><a name="l00179"></a><span class="lineno"> 179</span> <span class="comment"> * @param inDistributed The Greenplum Database distribution policy for the</span></div> |
| <div class="line"><a name="l00180"></a><span class="lineno"> 180</span> <span class="comment"> * table. This can be either \c RANDOMLY, which is the default, or</span></div> |
| <div class="line"><a name="l00181"></a><span class="lineno"> 181</span> <span class="comment"> * <tt>BY (<em>column</em>, [...])</tt>. This parameter is ignored on</span></div> |
| <div class="line"><a name="l00182"></a><span class="lineno"> 182</span> <span class="comment"> * PostgreSQL.</span></div> |
| <div class="line"><a name="l00183"></a><span class="lineno"> 183</span> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00184"></a><span class="lineno"> 184</span> <span class="comment"> * @usage</span></div> |
| <div class="line"><a name="l00185"></a><span class="lineno"> 185</span> <span class="comment"> * Use in the same way as the <tt>CREATE TABLE AS</tt> statement:</span></div> |
| <div class="line"><a name="l00186"></a><span class="lineno"> 186</span> <span class="comment"> * <pre>SELECT create_table_as('<em>table_name</em>', $$</span></div> |
| <div class="line"><a name="l00187"></a><span class="lineno"> 187</span> <span class="comment"> * <em>query</em></span></div> |
| <div class="line"><a name="l00188"></a><span class="lineno"> 188</span> <span class="comment"> *$$, 'BY (<em>column</em>, [...]) | RANDOMLY');</pre></span></div> |
| <div class="line"><a name="l00189"></a><span class="lineno"> 189</span> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00190"></a><span class="lineno"> 190</span> <span class="comment"> * @examp</span></div> |
| <div class="line"><a name="l00191"></a><span class="lineno"> 191</span> <span class="comment"> * <pre>SELECT create_table_as('public.test', $$</span></div> |
| <div class="line"><a name="l00192"></a><span class="lineno"> 192</span> <span class="comment"> * SELECT * FROM generate_series(1,10) AS id</span></div> |
| <div class="line"><a name="l00193"></a><span class="lineno"> 193</span> <span class="comment"> *$$, 'BY (id)');\n</span></div> |
| <div class="line"><a name="l00194"></a><span class="lineno"> 194</span> <span class="comment"> *SELECT create_table_as('logregr_result', $$</span></div> |
| <div class="line"><a name="l00195"></a><span class="lineno"> 195</span> <span class="comment"> * SELECT * FROM logregr('data', 'y', 'x')</span></div> |
| <div class="line"><a name="l00196"></a><span class="lineno"> 196</span> <span class="comment"> *$$, 'RANDOMLY');</pre></span></div> |
| <div class="line"><a name="l00197"></a><span class="lineno"> 197</span> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00198"></a><span class="lineno"> 198</span> <span class="comment"> * @note This function is a workaround. For compliance with the SQL standard and</span></div> |
| <div class="line"><a name="l00199"></a><span class="lineno"> 199</span> <span class="comment"> * for optimal performance, please use the normal <tt>CREATE TABLE AS</tt></span></div> |
| <div class="line"><a name="l00200"></a><span class="lineno"> 200</span> <span class="comment"> * statement whenever possible.</span></div> |
| <div class="line"><a name="l00201"></a><span class="lineno"> 201</span> <span class="comment"> * Known caveats of this workaround:</span></div> |
| <div class="line"><a name="l00202"></a><span class="lineno"> 202</span> <span class="comment"> * - For queries returning a large number of rows, this function will be</span></div> |
| <div class="line"><a name="l00203"></a><span class="lineno"> 203</span> <span class="comment"> * significantly slower than the <tt>CREATE TABLE AS</tt> statement.</span></div> |
| <div class="line"><a name="l00204"></a><span class="lineno"> 204</span> <span class="comment"> */</span></div> |
| <div class="line"><a name="l00205"></a><span class="lineno"> 205</span> CREATE FUNCTION MADLIB_SCHEMA.<a class="code" href="compatibility_8sql__in.html#a7e4ff90d5d720d76651643eefa66cd14" title="Mimick CREATE TABLE AS. Create a table and fill it with data computed by a SELECT command...">create_table_as</a>(</div> |
| <div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  "inTableName" VARCHAR,</div> |
| <div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  "inSQL" VARCHAR,</div> |
| <div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  "inDistributed" VARCHAR <span class="comment">/*+ = 'RANDOMLY' */</span>)</div> |
| <div class="line"><a name="l00209"></a><span class="lineno"> 209</span> RETURNS VOID</div> |
| <div class="line"><a name="l00210"></a><span class="lineno"> 210</span> LANGUAGE sql</div> |
| <div class="line"><a name="l00211"></a><span class="lineno"> 211</span> VOLATILE</div> |
| <div class="line"><a name="l00212"></a><span class="lineno"> 212</span> RETURNS NULL ON NULL INPUT</div> |
| <div class="line"><a name="l00213"></a><span class="lineno"> 213</span> AS $$</div> |
| <div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  SELECT MADLIB_SCHEMA.internal_create_table_as(FALSE,</div> |
| <div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  $1, $2, $3);</div> |
| <div class="line"><a name="l00216"></a><span class="lineno"> 216</span> $$;</div> |
| <div class="line"><a name="l00217"></a><span class="lineno"> 217</span> </div> |
| <div class="line"><a name="l00218"></a><span class="lineno"> 218</span> </div> |
| <div class="line"><a name="l00219"></a><span class="lineno"> 219</span> CREATE FUNCTION MADLIB_SCHEMA.<a class="code" href="compatibility_8sql__in.html#a7e4ff90d5d720d76651643eefa66cd14" title="Mimick CREATE TABLE AS. Create a table and fill it with data computed by a SELECT command...">create_table_as</a>(</div> |
| <div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  "inTableName" VARCHAR,</div> |
| <div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  "inSQL" VARCHAR)</div> |
| <div class="line"><a name="l00222"></a><span class="lineno"> 222</span> RETURNS VOID</div> |
| <div class="line"><a name="l00223"></a><span class="lineno"> 223</span> LANGUAGE sql</div> |
| <div class="line"><a name="l00224"></a><span class="lineno"> 224</span> VOLATILE</div> |
| <div class="line"><a name="l00225"></a><span class="lineno"><a class="code" href="compatibility_8sql__in.html#a7e4ff90d5d720d76651643eefa66cd14"> 225</a></span> RETURNS NULL ON NULL INPUT</div> |
| <div class="line"><a name="l00226"></a><span class="lineno"> 226</span> AS $$</div> |
| <div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  SELECT MADLIB_SCHEMA.internal_create_table_as(FALSE,</div> |
| <div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  $1, $2, 'RANDOMLY');</div> |
| <div class="line"><a name="l00229"></a><span class="lineno"> 229</span> $$;</div> |
| <div class="line"><a name="l00230"></a><span class="lineno"> 230</span> </div> |
| <div class="line"><a name="l00231"></a><span class="lineno"> 231</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00232"></a><span class="lineno"> 232</span> <span class="comment">/**</span></div> |
| <div class="line"><a name="l00233"></a><span class="lineno"> 233</span> <span class="comment"> * @brief Mimick <tt>CREATE TEMPORARY TABLE AS</tt>. Create a temporary table</span></div> |
| <div class="line"><a name="l00234"></a><span class="lineno"> 234</span> <span class="comment"> * and fill it with data computed by a \c SELECT command.</span></div> |
| <div class="line"><a name="l00235"></a><span class="lineno"> 235</span> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00236"></a><span class="lineno"> 236</span> <span class="comment"> * @sa create_table_as()</span></div> |
| <div class="line"><a name="l00237"></a><span class="lineno"> 237</span> <span class="comment"> */</span></div> |
| <div class="line"><a name="l00238"></a><span class="lineno"> 238</span> CREATE FUNCTION MADLIB_SCHEMA.<a class="code" href="compatibility_8sql__in.html#a3f1c139a9b5dceb5312f730be2a5868d" title="Mimick CREATE TEMPORARY TABLE AS. Create a temporary table and fill it with data computed by a SELECT...">create_temporary_table_as</a>(</div> |
| <div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  "inTableName" VARCHAR,</div> |
| <div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  "inSQL" VARCHAR,</div> |
| <div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  "inDistributed" VARCHAR <span class="comment">/*+ = 'RANDOMLY' */</span>)</div> |
| <div class="line"><a name="l00242"></a><span class="lineno"> 242</span> RETURNS VOID</div> |
| <div class="line"><a name="l00243"></a><span class="lineno"> 243</span> LANGUAGE sql</div> |
| <div class="line"><a name="l00244"></a><span class="lineno"> 244</span> VOLATILE</div> |
| <div class="line"><a name="l00245"></a><span class="lineno"> 245</span> RETURNS NULL ON NULL INPUT</div> |
| <div class="line"><a name="l00246"></a><span class="lineno"> 246</span> AS $$</div> |
| <div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  SELECT MADLIB_SCHEMA.internal_create_table_as(TRUE,</div> |
| <div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  $1, $2, $3);</div> |
| <div class="line"><a name="l00249"></a><span class="lineno"> 249</span> $$;</div> |
| <div class="line"><a name="l00250"></a><span class="lineno"> 250</span> </div> |
| <div class="line"><a name="l00251"></a><span class="lineno"> 251</span> </div> |
| <div class="line"><a name="l00252"></a><span class="lineno"> 252</span> CREATE FUNCTION MADLIB_SCHEMA.<a class="code" href="compatibility_8sql__in.html#a3f1c139a9b5dceb5312f730be2a5868d" title="Mimick CREATE TEMPORARY TABLE AS. Create a temporary table and fill it with data computed by a SELECT...">create_temporary_table_as</a>(</div> |
| <div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  "inTableName" VARCHAR,</div> |
| <div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  "inSQL" VARCHAR)</div> |
| <div class="line"><a name="l00255"></a><span class="lineno"> 255</span> RETURNS VOID</div> |
| <div class="line"><a name="l00256"></a><span class="lineno"> 256</span> LANGUAGE sql</div> |
| <div class="line"><a name="l00257"></a><span class="lineno"> 257</span> VOLATILE</div> |
| <div class="line"><a name="l00258"></a><span class="lineno"><a class="code" href="compatibility_8sql__in.html#a3f1c139a9b5dceb5312f730be2a5868d"> 258</a></span> RETURNS NULL ON NULL INPUT</div> |
| <div class="line"><a name="l00259"></a><span class="lineno"> 259</span> AS $$</div> |
| <div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  SELECT MADLIB_SCHEMA.internal_create_table_as(TRUE,</div> |
| <div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  $1, $2, 'RANDOMLY');</div> |
| <div class="line"><a name="l00262"></a><span class="lineno"> 262</span> $$;</div> |
| <div class="line"><a name="l00263"></a><span class="lineno"> 263</span> </div> |
| <div class="line"><a name="l00264"></a><span class="lineno"> 264</span> </div> |
| <div class="line"><a name="l00265"></a><span class="lineno"> 265</span> <span class="comment">/*</span></div> |
| <div class="line"><a name="l00266"></a><span class="lineno"> 266</span> <span class="comment"> * We also provide create_temp_table_as, but we do not advertise it in our</span></div> |
| <div class="line"><a name="l00267"></a><span class="lineno"> 267</span> <span class="comment"> * documentation.</span></div> |
| <div class="line"><a name="l00268"></a><span class="lineno"> 268</span> <span class="comment"> */</span></div> |
| <div class="line"><a name="l00269"></a><span class="lineno"> 269</span> CREATE FUNCTION MADLIB_SCHEMA.create_temp_table_as(</div> |
| <div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  "inTableName" VARCHAR,</div> |
| <div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  "inSQL" VARCHAR,</div> |
| <div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  "inDistributed" VARCHAR <span class="comment">/*+ = 'RANDOMLY' */</span>)</div> |
| <div class="line"><a name="l00273"></a><span class="lineno"> 273</span> RETURNS VOID</div> |
| <div class="line"><a name="l00274"></a><span class="lineno"> 274</span> LANGUAGE sql</div> |
| <div class="line"><a name="l00275"></a><span class="lineno"> 275</span> VOLATILE</div> |
| <div class="line"><a name="l00276"></a><span class="lineno"> 276</span> RETURNS NULL ON NULL INPUT</div> |
| <div class="line"><a name="l00277"></a><span class="lineno"> 277</span> AS $$</div> |
| <div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  SELECT MADLIB_SCHEMA.internal_create_table_as(TRUE,</div> |
| <div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  $1, $2, $3);</div> |
| <div class="line"><a name="l00280"></a><span class="lineno"> 280</span> $$;</div> |
| <div class="line"><a name="l00281"></a><span class="lineno"> 281</span> </div> |
| <div class="line"><a name="l00282"></a><span class="lineno"> 282</span> </div> |
| <div class="line"><a name="l00283"></a><span class="lineno"> 283</span> CREATE FUNCTION MADLIB_SCHEMA.create_temp_table_as(</div> |
| <div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  "inTableName" VARCHAR,</div> |
| <div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  "inSQL" VARCHAR)</div> |
| <div class="line"><a name="l00286"></a><span class="lineno"> 286</span> RETURNS VOID</div> |
| <div class="line"><a name="l00287"></a><span class="lineno"> 287</span> LANGUAGE sql</div> |
| <div class="line"><a name="l00288"></a><span class="lineno"> 288</span> VOLATILE</div> |
| <div class="line"><a name="l00289"></a><span class="lineno"> 289</span> RETURNS NULL ON NULL INPUT</div> |
| <div class="line"><a name="l00290"></a><span class="lineno"> 290</span> AS $$</div> |
| <div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  SELECT MADLIB_SCHEMA.internal_create_table_as(TRUE,</div> |
| <div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  $1, $2, 'RANDOMLY');</div> |
| <div class="line"><a name="l00293"></a><span class="lineno"> 293</span> $$;</div> |
| <div class="line"><a name="l00294"></a><span class="lineno"> 294</span> </div> |
| <div class="line"><a name="l00295"></a><span class="lineno"> 295</span> m4_changequote(<!`!>,<!'!>)</div> |
| </div><!-- fragment --></div><!-- contents --> |
| </div><!-- doc-content --> |
| <!-- start footer part --> |
| <div id="nav-path" class="navpath"><!-- id is needed for treeview function! --> |
| <ul> |
| <li class="navelem"><a class="el" href="dir_68267d1309a1af8e8297ef4c3efbcdba.html">src</a></li><li class="navelem"><a class="el" href="dir_efbcf68973d247bbf15f9eecae7f24e3.html">ports</a></li><li class="navelem"><a class="el" href="dir_a4a48839224ef8488facbffa8a397967.html">postgres</a></li><li class="navelem"><a class="el" href="dir_dc596537ad427a4d866006d1a3e1fe29.html">modules</a></li><li class="navelem"><a class="el" href="dir_7668ab45ab1521840e6e151e43539dd4.html">compatibility</a></li><li class="navelem"><a class="el" href="compatibility_8sql__in.html">compatibility.sql_in</a></li> |
| <li class="footer">Generated on Wed Aug 21 2013 16:09:52 for MADlib by |
| <a href="http://www.doxygen.org/index.html"> |
| <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.4 </li> |
| </ul> |
| </div> |
| </body> |
| </html> |
