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<title>MADlib: utilities.sql_in File Reference</title>
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<div class="header">
  <div class="summary">
<a href="#func-members">Functions</a>  </div>
  <div class="headertitle">
<div class="title">utilities.sql_in File Reference</div>  </div>
</div><!--header-->
<div class="contents">

<p>SQL functions for carrying out routine tasks.  
<a href="#details">More...</a></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:aab5ea2cd6201e38e24ca62b0fb91fb7a"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="utilities_8sql__in.html#aab5ea2cd6201e38e24ca62b0fb91fb7a">cleanup_madlib_temp_tables</a> (text target_schema)</td></tr>
<tr class="memdesc:aab5ea2cd6201e38e24ca62b0fb91fb7a"><td class="mdescLeft">&#160;</td><td class="mdescRight">Drop all tables matching pattern 'madlib_temp' in a given schema.  <a href="#aab5ea2cd6201e38e24ca62b0fb91fb7a">More...</a><br /></td></tr>
<tr class="separator:aab5ea2cd6201e38e24ca62b0fb91fb7a"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a156eb9d1c814592e59600980977a64eb"><td class="memItemLeft" align="right" valign="top">text&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="utilities_8sql__in.html#a156eb9d1c814592e59600980977a64eb">cleanup_madlib_temp_tables_script</a> (text target_schema)</td></tr>
<tr class="separator:a156eb9d1c814592e59600980977a64eb"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a0a26602860109f870a82badff95c2fc3"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="utilities_8sql__in.html#a0a26602860109f870a82badff95c2fc3">cleanup_madlib_temp_views</a> (text target_schema)</td></tr>
<tr class="separator:a0a26602860109f870a82badff95c2fc3"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a9ce7ffa76acc8a0638e9bc48be99f36a"><td class="memItemLeft" align="right" valign="top">text&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="utilities_8sql__in.html#a9ce7ffa76acc8a0638e9bc48be99f36a">version</a> ()</td></tr>
<tr class="memdesc:a9ce7ffa76acc8a0638e9bc48be99f36a"><td class="mdescLeft">&#160;</td><td class="mdescRight">Return MADlib build information.  <a href="#a9ce7ffa76acc8a0638e9bc48be99f36a">More...</a><br /></td></tr>
<tr class="separator:a9ce7ffa76acc8a0638e9bc48be99f36a"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a76cfdbed8a6782f37f50710d855434bd"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="utilities_8sql__in.html#a76cfdbed8a6782f37f50710d855434bd">assert</a> (boolean condition, varchar msg)</td></tr>
<tr class="memdesc:a76cfdbed8a6782f37f50710d855434bd"><td class="mdescLeft">&#160;</td><td class="mdescRight">Raise an exception if the given condition is not satisfied.  <a href="#a76cfdbed8a6782f37f50710d855434bd">More...</a><br /></td></tr>
<tr class="separator:a76cfdbed8a6782f37f50710d855434bd"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a4d49e00b4dd6059f61ffb9fdc0a696f7"><td class="memItemLeft" align="right" valign="top">float8&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="utilities_8sql__in.html#a4d49e00b4dd6059f61ffb9fdc0a696f7">relative_error</a> (float8 approx, float8 value)</td></tr>
<tr class="memdesc:a4d49e00b4dd6059f61ffb9fdc0a696f7"><td class="mdescLeft">&#160;</td><td class="mdescRight">Compute the relative error of an approximate value.  <a href="#a4d49e00b4dd6059f61ffb9fdc0a696f7">More...</a><br /></td></tr>
<tr class="separator:a4d49e00b4dd6059f61ffb9fdc0a696f7"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a26a54368fbf2460323cacf95db76fd2f"><td class="memItemLeft" align="right" valign="top">float8&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="utilities_8sql__in.html#a26a54368fbf2460323cacf95db76fd2f">relative_error</a> (float8[] approx, float8[] value)</td></tr>
<tr class="memdesc:a26a54368fbf2460323cacf95db76fd2f"><td class="mdescLeft">&#160;</td><td class="mdescRight">Compute the relative error (w.r.t. the 2-norm) of an apprixmate vector.  <a href="#a26a54368fbf2460323cacf95db76fd2f">More...</a><br /></td></tr>
<tr class="separator:a26a54368fbf2460323cacf95db76fd2f"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aa90ffaebb43a5cbcb5c48281cbadd3b0"><td class="memItemLeft" align="right" valign="top">boolean&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="utilities_8sql__in.html#aa90ffaebb43a5cbcb5c48281cbadd3b0">check_if_raises_error</a> (text sql)</td></tr>
<tr class="memdesc:aa90ffaebb43a5cbcb5c48281cbadd3b0"><td class="mdescLeft">&#160;</td><td class="mdescRight">Check if a SQL statement raises an error.  <a href="#aa90ffaebb43a5cbcb5c48281cbadd3b0">More...</a><br /></td></tr>
<tr class="separator:aa90ffaebb43a5cbcb5c48281cbadd3b0"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ac1f509bd94c6309b59eb4d479fb2a470"><td class="memItemLeft" align="right" valign="top">boolean&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="utilities_8sql__in.html#ac1f509bd94c6309b59eb4d479fb2a470">check_if_col_exists</a> (text source_table, text column_name)</td></tr>
<tr class="memdesc:ac1f509bd94c6309b59eb4d479fb2a470"><td class="mdescLeft">&#160;</td><td class="mdescRight">Check if a column exists in a table.  <a href="#ac1f509bd94c6309b59eb4d479fb2a470">More...</a><br /></td></tr>
<tr class="separator:ac1f509bd94c6309b59eb4d479fb2a470"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a48bed63cab78a5446fa4c122eaae3a40"><td class="memItemLeft" align="right" valign="top">boolean&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="utilities_8sql__in.html#a48bed63cab78a5446fa4c122eaae3a40">isnan</a> (float8 number)</td></tr>
<tr class="memdesc:a48bed63cab78a5446fa4c122eaae3a40"><td class="mdescLeft">&#160;</td><td class="mdescRight">Check if a floating-point number is NaN (not a number)  <a href="#a48bed63cab78a5446fa4c122eaae3a40">More...</a><br /></td></tr>
<tr class="separator:a48bed63cab78a5446fa4c122eaae3a40"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a56501b6f9fabe65d7a6a6beb70a0e000"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="utilities_8sql__in.html#a56501b6f9fabe65d7a6a6beb70a0e000">create_schema_pg_temp</a> ()</td></tr>
<tr class="memdesc:a56501b6f9fabe65d7a6a6beb70a0e000"><td class="mdescLeft">&#160;</td><td class="mdescRight">Create the temporary schema if it does not exist yet.  <a href="#a56501b6f9fabe65d7a6a6beb70a0e000">More...</a><br /></td></tr>
<tr class="separator:a56501b6f9fabe65d7a6a6beb70a0e000"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ab194d6a1222672c314ea39b78aad8fd0"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="utilities_8sql__in.html#ab194d6a1222672c314ea39b78aad8fd0">noop</a> ()</td></tr>
<tr class="memdesc:ab194d6a1222672c314ea39b78aad8fd0"><td class="mdescLeft">&#160;</td><td class="mdescRight">Create volatile noop function.  <a href="#ab194d6a1222672c314ea39b78aad8fd0">More...</a><br /></td></tr>
<tr class="separator:ab194d6a1222672c314ea39b78aad8fd0"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a60c4765ce8dc639cbb0ad4c389f5f1ad"><td class="memItemLeft" align="right" valign="top">bytea8&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="utilities_8sql__in.html#a60c4765ce8dc639cbb0ad4c389f5f1ad">bytea8in</a> (cstring)</td></tr>
<tr class="separator:a60c4765ce8dc639cbb0ad4c389f5f1ad"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:adff923d42d4bdb2b631d6cafd5f37a43"><td class="memItemLeft" align="right" valign="top">cstring&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="utilities_8sql__in.html#adff923d42d4bdb2b631d6cafd5f37a43">bytea8out</a> (bytea8)</td></tr>
<tr class="separator:adff923d42d4bdb2b631d6cafd5f37a43"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a244a7ff30f2788a6f4816417982eb13b"><td class="memItemLeft" align="right" valign="top">bytea8&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="utilities_8sql__in.html#a244a7ff30f2788a6f4816417982eb13b">bytea8recv</a> (internal)</td></tr>
<tr class="separator:a244a7ff30f2788a6f4816417982eb13b"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aeb90c740e8e6b67aa60a11c430fa9050"><td class="memItemLeft" align="right" valign="top">bytea&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="utilities_8sql__in.html#aeb90c740e8e6b67aa60a11c430fa9050">bytea8send</a> (bytea8)</td></tr>
<tr class="separator:aeb90c740e8e6b67aa60a11c430fa9050"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a7086f5e79c0f53a849759227759d16d7"><td class="memItemLeft" align="right" valign="top">varchar&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="utilities_8sql__in.html#a7086f5e79c0f53a849759227759d16d7">__internal_get_col_names_except_dep_variable</a> (varchar source_table, varchar dependent_varname)</td></tr>
<tr class="memdesc:a7086f5e79c0f53a849759227759d16d7"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get all column names except dependent variable.  <a href="#a7086f5e79c0f53a849759227759d16d7">More...</a><br /></td></tr>
<tr class="separator:a7086f5e79c0f53a849759227759d16d7"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a5b0156044142673183205154f9e63ddc"><td class="memItemLeft" align="right" valign="top">varchar&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="utilities_8sql__in.html#a5b0156044142673183205154f9e63ddc">__unique_string</a> ()</td></tr>
<tr class="memdesc:a5b0156044142673183205154f9e63ddc"><td class="mdescLeft">&#160;</td><td class="mdescRight">Generate random remporary names for temp table and other names.  <a href="#a5b0156044142673183205154f9e63ddc">More...</a><br /></td></tr>
<tr class="separator:a5b0156044142673183205154f9e63ddc"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a967afc3041b28c8ceedcef8d25c26b9b"><td class="memItemLeft" align="right" valign="top">varchar []&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="utilities_8sql__in.html#a967afc3041b28c8ceedcef8d25c26b9b">_string_to_array</a> (varchar s)</td></tr>
<tr class="memdesc:a967afc3041b28c8ceedcef8d25c26b9b"><td class="mdescLeft">&#160;</td><td class="mdescRight">Takes a string of comma separated values and puts it into an array.  <a href="#a967afc3041b28c8ceedcef8d25c26b9b">More...</a><br /></td></tr>
<tr class="separator:a967afc3041b28c8ceedcef8d25c26b9b"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:abc867482053e6692047d051b679953a5"><td class="memItemLeft" align="right" valign="top">text&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="utilities_8sql__in.html#abc867482053e6692047d051b679953a5">bool_to_text</a> (boolean)</td></tr>
<tr class="memdesc:abc867482053e6692047d051b679953a5"><td class="mdescLeft">&#160;</td><td class="mdescRight">Cast boolean into text.  <a href="#abc867482053e6692047d051b679953a5">More...</a><br /></td></tr>
<tr class="separator:abc867482053e6692047d051b679953a5"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:abdd2768e61b034d04c934a981259bbfd"><td class="memItemLeft" align="right" valign="top">text&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="utilities_8sql__in.html#abdd2768e61b034d04c934a981259bbfd">__to_char</a> (anyelement val)</td></tr>
<tr class="memdesc:abdd2768e61b034d04c934a981259bbfd"><td class="mdescLeft">&#160;</td><td class="mdescRight">Cast any value to text.  <a href="#abdd2768e61b034d04c934a981259bbfd">More...</a><br /></td></tr>
<tr class="separator:abdd2768e61b034d04c934a981259bbfd"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a2dc21ec6de26adef2cf1699ed8dab5aa"><td class="memItemLeft" align="right" valign="top">set&lt; _grp_state_type &gt;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="utilities_8sql__in.html#a2dc21ec6de26adef2cf1699ed8dab5aa">_gen_state</a> (text[] grp_key, integer[] iteration, float8[] state)</td></tr>
<tr class="separator:a2dc21ec6de26adef2cf1699ed8dab5aa"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a378fd0afa1245520f2270e602ed9e6b6"><td class="memItemLeft" align="right" valign="top">float8&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="utilities_8sql__in.html#a378fd0afa1245520f2270e602ed9e6b6">_final_mode</a> (float8[])</td></tr>
<tr class="separator:a378fd0afa1245520f2270e602ed9e6b6"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ac25ef90f8a8e2f9b2244a57d92086c91"><td class="memItemLeft" align="right" valign="top">aggregate float8&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="utilities_8sql__in.html#ac25ef90f8a8e2f9b2244a57d92086c91">mode</a> (float8)</td></tr>
<tr class="separator:ac25ef90f8a8e2f9b2244a57d92086c91"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a244f77f87f2612800b1683033a21dcca"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="utilities_8sql__in.html#a244f77f87f2612800b1683033a21dcca">dropcols</a> (varchar source_table, varchar out_table, varchar cols_to_drop)</td></tr>
<tr class="memdesc:a244f77f87f2612800b1683033a21dcca"><td class="mdescLeft">&#160;</td><td class="mdescRight">Creates a new table with a subset of columns dropped from another source table.  <a href="#a244f77f87f2612800b1683033a21dcca">More...</a><br /></td></tr>
<tr class="separator:a244f77f87f2612800b1683033a21dcca"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:af4627d77d237aeadaa4b43ff168ae322"><td class="memItemLeft" align="right" valign="top">boolean&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="utilities_8sql__in.html#af4627d77d237aeadaa4b43ff168ae322">is_pg_major_version_less_than</a> (integer compare_version)</td></tr>
<tr class="separator:af4627d77d237aeadaa4b43ff168ae322"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ad1c36cb57cfddb39b69fd4d46e0c7dcb"><td class="memItemLeft" align="right" valign="top">integer&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="utilities_8sql__in.html#ad1c36cb57cfddb39b69fd4d46e0c7dcb">trap_error</a> (text stmt)</td></tr>
<tr class="separator:ad1c36cb57cfddb39b69fd4d46e0c7dcb"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a794b853f6c901050fb253f0760feedf7"><td class="memItemLeft" align="right" valign="top">boolean&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="utilities_8sql__in.html#a794b853f6c901050fb253f0760feedf7">test_error_msg</a> (text stmt, text msg)</td></tr>
<tr class="separator:a794b853f6c901050fb253f0760feedf7"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a2d9f28eac38148fedb9782ee2f01639c"><td class="memItemLeft" align="right" valign="top">boolean&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="utilities_8sql__in.html#a2d9f28eac38148fedb9782ee2f01639c">test_input_table</a> (text stmt)</td></tr>
<tr class="separator:a2d9f28eac38148fedb9782ee2f01639c"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a54813ec82939f96cc899399a2ae65857"><td class="memItemLeft" align="right" valign="top">boolean&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="utilities_8sql__in.html#a54813ec82939f96cc899399a2ae65857">test_output_table</a> (text stmt)</td></tr>
<tr class="separator:a54813ec82939f96cc899399a2ae65857"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a4df02278e7bba3e42a6eab87597e4ea8"><td class="memItemLeft" align="right" valign="top">boolean&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="utilities_8sql__in.html#a4df02278e7bba3e42a6eab87597e4ea8">is_ver_greater_than_gp_640_or_pg_11</a> ()</td></tr>
<tr class="separator:a4df02278e7bba3e42a6eab87597e4ea8"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ab0c056b9f6ec748b24352261276775ba"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="utilities_8sql__in.html#ab0c056b9f6ec748b24352261276775ba">assert_guc_value</a> (text guc_name, text expected_guc_value)</td></tr>
<tr class="separator:ab0c056b9f6ec748b24352261276775ba"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aaaf5ac0d3f6416b4bb093fd17c5c2a14"><td class="memItemLeft" align="right" valign="top">boolean&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="utilities_8sql__in.html#aaaf5ac0d3f6416b4bb093fd17c5c2a14">is_table_unlogged</a> (text tbl_name)</td></tr>
<tr class="separator:aaaf5ac0d3f6416b4bb093fd17c5c2a14"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><dl class="section see"><dt>See also</dt><dd>For a brief overview of utility functions, see the module description <a class="el" href="group__grp__utilities.html">Database Functions</a>. </dd></dl>
</div><h2 class="groupheader">Function Documentation</h2>
<a id="a7086f5e79c0f53a849759227759d16d7"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a7086f5e79c0f53a849759227759d16d7">&#9670;&nbsp;</a></span>__internal_get_col_names_except_dep_variable()</h2>

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          <td class="memname">varchar __internal_get_col_names_except_dep_variable </td>
          <td>(</td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>source_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>dependent_varname</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

</div>
</div>
<a id="abdd2768e61b034d04c934a981259bbfd"></a>
<h2 class="memtitle"><span class="permalink"><a href="#abdd2768e61b034d04c934a981259bbfd">&#9670;&nbsp;</a></span>__to_char()</h2>

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          <td class="memname">text __to_char </td>
          <td>(</td>
          <td class="paramtype">anyelement&#160;</td>
          <td class="paramname"><em>val</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">val</td><td>A value with any specific type.</td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The text format string for the value.</dd></dl>
<dl class="section note"><dt>Note</dt><dd>Greenplum doesn't support bit/boolean to text casting. </dd></dl>

</div>
</div>
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<h2 class="memtitle"><span class="permalink"><a href="#a5b0156044142673183205154f9e63ddc">&#9670;&nbsp;</a></span>__unique_string()</h2>

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          <td class="memname">varchar __unique_string </td>
          <td>(</td>
          <td class="paramname"></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">

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<h2 class="memtitle"><span class="permalink"><a href="#a378fd0afa1245520f2270e602ed9e6b6">&#9670;&nbsp;</a></span>_final_mode()</h2>

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          <td class="memname">float8 _final_mode </td>
          <td>(</td>
          <td class="paramtype">float8&#160;</td>
          <td class="paramname">[]</td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">

</div>
</div>
<a id="a2dc21ec6de26adef2cf1699ed8dab5aa"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a2dc21ec6de26adef2cf1699ed8dab5aa">&#9670;&nbsp;</a></span>_gen_state()</h2>

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          <td class="memname">set&lt;_grp_state_type&gt; _gen_state </td>
          <td>(</td>
          <td class="paramtype">text []&#160;</td>
          <td class="paramname"><em>grp_key</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">integer []&#160;</td>
          <td class="paramname"><em>iteration</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float8 []&#160;</td>
          <td class="paramname"><em>state</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

</div>
</div>
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<h2 class="memtitle"><span class="permalink"><a href="#a967afc3041b28c8ceedcef8d25c26b9b">&#9670;&nbsp;</a></span>_string_to_array()</h2>

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          <td class="memname">varchar [] _string_to_array </td>
          <td>(</td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>s</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">

</div>
</div>
<a id="a76cfdbed8a6782f37f50710d855434bd"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a76cfdbed8a6782f37f50710d855434bd">&#9670;&nbsp;</a></span>assert()</h2>

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          <td class="memname">void assert </td>
          <td>(</td>
          <td class="paramtype">boolean&#160;</td>
          <td class="paramname"><em>condition</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>msg</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

</div>
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<a id="ab0c056b9f6ec748b24352261276775ba"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ab0c056b9f6ec748b24352261276775ba">&#9670;&nbsp;</a></span>assert_guc_value()</h2>

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          <td class="memname">void assert_guc_value </td>
          <td>(</td>
          <td class="paramtype">text&#160;</td>
          <td class="paramname"><em>guc_name</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">text&#160;</td>
          <td class="paramname"><em>expected_guc_value</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

</div>
</div>
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<h2 class="memtitle"><span class="permalink"><a href="#abc867482053e6692047d051b679953a5">&#9670;&nbsp;</a></span>bool_to_text()</h2>

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          <td class="memname">text bool_to_text </td>
          <td>(</td>
          <td class="paramtype">boolean&#160;</td>
          <td class="paramname"></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">

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<a id="a60c4765ce8dc639cbb0ad4c389f5f1ad"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a60c4765ce8dc639cbb0ad4c389f5f1ad">&#9670;&nbsp;</a></span>bytea8in()</h2>

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          <td class="memname">bytea8 bytea8in </td>
          <td>(</td>
          <td class="paramtype">cstring&#160;</td>
          <td class="paramname"></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">

</div>
</div>
<a id="adff923d42d4bdb2b631d6cafd5f37a43"></a>
<h2 class="memtitle"><span class="permalink"><a href="#adff923d42d4bdb2b631d6cafd5f37a43">&#9670;&nbsp;</a></span>bytea8out()</h2>

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          <td class="memname">cstring bytea8out </td>
          <td>(</td>
          <td class="paramtype">bytea8&#160;</td>
          <td class="paramname"></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">

</div>
</div>
<a id="a244a7ff30f2788a6f4816417982eb13b"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a244a7ff30f2788a6f4816417982eb13b">&#9670;&nbsp;</a></span>bytea8recv()</h2>

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          <td class="memname">bytea8 bytea8recv </td>
          <td>(</td>
          <td class="paramtype">internal&#160;</td>
          <td class="paramname"></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">

</div>
</div>
<a id="aeb90c740e8e6b67aa60a11c430fa9050"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aeb90c740e8e6b67aa60a11c430fa9050">&#9670;&nbsp;</a></span>bytea8send()</h2>

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          <td class="memname">bytea bytea8send </td>
          <td>(</td>
          <td class="paramtype">bytea8&#160;</td>
          <td class="paramname"></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">

</div>
</div>
<a id="ac1f509bd94c6309b59eb4d479fb2a470"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ac1f509bd94c6309b59eb4d479fb2a470">&#9670;&nbsp;</a></span>check_if_col_exists()</h2>

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          <td class="memname">boolean check_if_col_exists </td>
          <td>(</td>
          <td class="paramtype">text&#160;</td>
          <td class="paramname"><em>source_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">text&#160;</td>
          <td class="paramname"><em>column_name</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">source_table</td><td>Source table </td></tr>
    <tr><td class="paramname">column_name</td><td>Column name in the table </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd><code>TRUE</code> if it exists and FALSE if not </dd></dl>

</div>
</div>
<a id="aa90ffaebb43a5cbcb5c48281cbadd3b0"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aa90ffaebb43a5cbcb5c48281cbadd3b0">&#9670;&nbsp;</a></span>check_if_raises_error()</h2>

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          <td class="memname">boolean check_if_raises_error </td>
          <td>(</td>
          <td class="paramtype">text&#160;</td>
          <td class="paramname"><em>sql</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">sql</td><td>The SQL statement </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd><code>TRUE</code> if an exception is raised while executing <code>sql</code>, <code>FALSE</code> otherwise. </dd></dl>

</div>
</div>
<a id="aab5ea2cd6201e38e24ca62b0fb91fb7a"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aab5ea2cd6201e38e24ca62b0fb91fb7a">&#9670;&nbsp;</a></span>cleanup_madlib_temp_tables()</h2>

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          <td class="memname">void cleanup_madlib_temp_tables </td>
          <td>(</td>
          <td class="paramtype">text&#160;</td>
          <td class="paramname"><em>target_schema</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">target_schema</td><td>TEXT. The schema that takes affect. </td></tr>
  </table>
  </dd>
</dl>

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</div>
<a id="a156eb9d1c814592e59600980977a64eb"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a156eb9d1c814592e59600980977a64eb">&#9670;&nbsp;</a></span>cleanup_madlib_temp_tables_script()</h2>

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          <td class="memname">text cleanup_madlib_temp_tables_script </td>
          <td>(</td>
          <td class="paramtype">text&#160;</td>
          <td class="paramname"><em>target_schema</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">

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<a id="a0a26602860109f870a82badff95c2fc3"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a0a26602860109f870a82badff95c2fc3">&#9670;&nbsp;</a></span>cleanup_madlib_temp_views()</h2>

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          <td class="memname">void cleanup_madlib_temp_views </td>
          <td>(</td>
          <td class="paramtype">text&#160;</td>
          <td class="paramname"><em>target_schema</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">

</div>
</div>
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<h2 class="memtitle"><span class="permalink"><a href="#a56501b6f9fabe65d7a6a6beb70a0e000">&#9670;&nbsp;</a></span>create_schema_pg_temp()</h2>

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          <td class="memname">void create_schema_pg_temp </td>
          <td>(</td>
          <td class="paramname"></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">

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<a id="a244f77f87f2612800b1683033a21dcca"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a244f77f87f2612800b1683033a21dcca">&#9670;&nbsp;</a></span>dropcols()</h2>

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          <td class="memname">void dropcols </td>
          <td>(</td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>source_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>out_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>cols_to_drop</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">source_table</td><td>Name of the table containing the source data. </td></tr>
    <tr><td class="paramname">out_table</td><td>Name of the generated table containing the output. If a table with the same name already exists, an error will be returned. </td></tr>
    <tr><td class="paramname">cols_to_drop</td><td>Comma-separated string of column names from the source table to drop. An error is returned if the output table does not contain any columns or if a requested column is not present in the source table. </td></tr>
  </table>
  </dd>
</dl>

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<a id="af4627d77d237aeadaa4b43ff168ae322"></a>
<h2 class="memtitle"><span class="permalink"><a href="#af4627d77d237aeadaa4b43ff168ae322">&#9670;&nbsp;</a></span>is_pg_major_version_less_than()</h2>

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          <td class="memname">boolean is_pg_major_version_less_than </td>
          <td>(</td>
          <td class="paramtype">integer&#160;</td>
          <td class="paramname"><em>compare_version</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">

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</div>
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<h2 class="memtitle"><span class="permalink"><a href="#aaaf5ac0d3f6416b4bb093fd17c5c2a14">&#9670;&nbsp;</a></span>is_table_unlogged()</h2>

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          <td class="memname">boolean is_table_unlogged </td>
          <td>(</td>
          <td class="paramtype">text&#160;</td>
          <td class="paramname"><em>tbl_name</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">

</div>
</div>
<a id="a4df02278e7bba3e42a6eab87597e4ea8"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a4df02278e7bba3e42a6eab87597e4ea8">&#9670;&nbsp;</a></span>is_ver_greater_than_gp_640_or_pg_11()</h2>

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          <td class="memname">boolean is_ver_greater_than_gp_640_or_pg_11 </td>
          <td>(</td>
          <td class="paramname"></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">

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</div>
<a id="a48bed63cab78a5446fa4c122eaae3a40"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a48bed63cab78a5446fa4c122eaae3a40">&#9670;&nbsp;</a></span>isnan()</h2>

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        <tr>
          <td class="memname">boolean isnan </td>
          <td>(</td>
          <td class="paramtype">float8&#160;</td>
          <td class="paramname"><em>number</em></td><td>)</td>
          <td></td>
        </tr>
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<p>This function exists for portability. Some DBMSs like PostgreSQL treat floating-point numbers as fully ordered &ndash; contrary to IEEE 754. (See, e.g., the <a href="http://www.postgresql.org/docs/current/static/datatype-numeric.html#DATATYPE-FLOAT">PostgreSQL documentation</a>. For portability, MADlib code should not make use of such "features" directly, but only use <a class="el" href="utilities_8sql__in.html#a48bed63cab78a5446fa4c122eaae3a40" title="Check if a floating-point number is NaN (not a number) ">isnan()</a> instead.</p>
<dl class="params"><dt>Parameters</dt><dd>
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    <tr><td class="paramname">number</td><td></td></tr>
  </table>
  </dd>
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<dl class="section return"><dt>Returns</dt><dd><code>TRUE</code> if <code>number</code> is <code>NaN</code>, <code>FALSE</code> otherwise </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#ac25ef90f8a8e2f9b2244a57d92086c91">&#9670;&nbsp;</a></span>mode()</h2>

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          <td class="memname">aggregate float8 mode </td>
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<h2 class="memtitle"><span class="permalink"><a href="#ab194d6a1222672c314ea39b78aad8fd0">&#9670;&nbsp;</a></span>noop()</h2>

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<p>The only use of this function is as an optimization fence when used in the SELECT list of a query. See, e.g., <a href="http://archives.postgresql.org/pgsql-sql/2012-07/msg00030.php">http://archives.postgresql.org/pgsql-sql/2012-07/msg00030.php</a> </p>

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<h2 class="memtitle"><span class="permalink"><a href="#a4d49e00b4dd6059f61ffb9fdc0a696f7">&#9670;&nbsp;</a></span>relative_error() <span class="overload">[1/2]</span></h2>

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          <td class="paramname"><em>approx</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float8&#160;</td>
          <td class="paramname"><em>value</em>&#160;</td>
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        <tr>
          <td></td>
          <td>)</td>
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<h2 class="memtitle"><span class="permalink"><a href="#a26a54368fbf2460323cacf95db76fd2f">&#9670;&nbsp;</a></span>relative_error() <span class="overload">[2/2]</span></h2>

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          <td class="paramtype">float8 []&#160;</td>
          <td class="paramname"><em>approx</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float8 []&#160;</td>
          <td class="paramname"><em>value</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
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<h2 class="memtitle"><span class="permalink"><a href="#a794b853f6c901050fb253f0760feedf7">&#9670;&nbsp;</a></span>test_error_msg()</h2>

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          <td class="memname">boolean test_error_msg </td>
          <td>(</td>
          <td class="paramtype">text&#160;</td>
          <td class="paramname"><em>stmt</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">text&#160;</td>
          <td class="paramname"><em>msg</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
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<h2 class="memtitle"><span class="permalink"><a href="#a2d9f28eac38148fedb9782ee2f01639c">&#9670;&nbsp;</a></span>test_input_table()</h2>

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          <td class="memname">boolean test_input_table </td>
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          <td class="paramtype">text&#160;</td>
          <td class="paramname"><em>stmt</em></td><td>)</td>
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<a id="a54813ec82939f96cc899399a2ae65857"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a54813ec82939f96cc899399a2ae65857">&#9670;&nbsp;</a></span>test_output_table()</h2>

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          <td class="memname">boolean test_output_table </td>
          <td>(</td>
          <td class="paramtype">text&#160;</td>
          <td class="paramname"><em>stmt</em></td><td>)</td>
          <td></td>
        </tr>
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</div><div class="memdoc">

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<h2 class="memtitle"><span class="permalink"><a href="#ad1c36cb57cfddb39b69fd4d46e0c7dcb">&#9670;&nbsp;</a></span>trap_error()</h2>

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          <td class="memname">integer trap_error </td>
          <td>(</td>
          <td class="paramtype">text&#160;</td>
          <td class="paramname"><em>stmt</em></td><td>)</td>
          <td></td>
        </tr>
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<h2 class="memtitle"><span class="permalink"><a href="#a9ce7ffa76acc8a0638e9bc48be99f36a">&#9670;&nbsp;</a></span>version()</h2>

<div class="memitem">
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          <td class="memname">text version </td>
          <td>(</td>
          <td class="paramname"></td><td>)</td>
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<dl class="section return"><dt>Returns</dt><dd>Summary of MADlib build information, consisting of MADlib version, git revision, cmake configuration time, build type, build system, C compiler, and C++ compiler </dd></dl>

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