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<title>MADlib: dt_preproc.sql_in File Reference</title>
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<a href="#func-members">Functions</a> </div>
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<div class="title">dt_preproc.sql_in File Reference</div> </div>
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<p>Functions used in C4.5 and random forest for data preprocessing.
<a href="#details">More...</a></p>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:a490f7a4dc4fcf407a0177370ce877256"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="dt__preproc_8sql__in.html#a490f7a4dc4fcf407a0177370ce877256">__validate_input_table</a> (text full_table_name, text[] feature_columns, text id_column, text class_column)</td></tr>
<tr class="separator:a490f7a4dc4fcf407a0177370ce877256"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ab033c418165fe11195006bd948bacd04"><td class="memItemLeft" align="right" valign="top">text&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="dt__preproc_8sql__in.html#ab033c418165fe11195006bd948bacd04">__get_classtable_name</a> (text meta_tbl_name)</td></tr>
<tr class="separator:ab033c418165fe11195006bd948bacd04"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ae8236322b62a83dd2862aef0068b68d9"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="dt__preproc_8sql__in.html#ae8236322b62a83dd2862aef0068b68d9">__drop_metatable</a> (text meta_tbl_name)</td></tr>
<tr class="separator:ae8236322b62a83dd2862aef0068b68d9"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a5101cb7fa622adb504779a691b1b9b01"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="dt__preproc_8sql__in.html#a5101cb7fa622adb504779a691b1b9b01">__create_metatable</a> (text meta_tbl_name)</td></tr>
<tr class="separator:a5101cb7fa622adb504779a691b1b9b01"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a45d6e5d9934d5f435c41f82b28dd5193"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="dt__preproc_8sql__in.html#a45d6e5d9934d5f435c41f82b28dd5193">__insert_into_metatable</a> (text meta_tbl_name, int col_index, text column_name, char column_type, boolean is_cont, text table_name, int num_dist_value)</td></tr>
<tr class="separator:a45d6e5d9934d5f435c41f82b28dd5193"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a09ad455902828bd5a474fdaf78615a0f"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="dt__preproc_8sql__in.html#a09ad455902828bd5a474fdaf78615a0f">__validate_metatable</a> (text meta_tbl_name)</td></tr>
<tr class="separator:a09ad455902828bd5a474fdaf78615a0f"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a436aa21412718984868087afca2c83ec"><td class="memItemLeft" align="right" valign="top">int4&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="dt__preproc_8sql__in.html#a436aa21412718984868087afca2c83ec">__distinct_feature_value</a> (text meta_tbl_name, int feature_id)</td></tr>
<tr class="separator:a436aa21412718984868087afca2c83ec"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ac7914f60e80d98f1515ad3c0da0781ae"><td class="memItemLeft" align="right" valign="top">int4&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="dt__preproc_8sql__in.html#ac7914f60e80d98f1515ad3c0da0781ae">__num_of_feature</a> (text meta_tbl_name)</td></tr>
<tr class="separator:ac7914f60e80d98f1515ad3c0da0781ae"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aff05e0b15c29a06b75c6e279de99c87d"><td class="memItemLeft" align="right" valign="top">int4&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="dt__preproc_8sql__in.html#aff05e0b15c29a06b75c6e279de99c87d">__num_of_class</a> (text meta_tbl_name)</td></tr>
<tr class="separator:aff05e0b15c29a06b75c6e279de99c87d"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a592394d16acfe6382f721b8efa37debc"><td class="memItemLeft" align="right" valign="top">text&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="dt__preproc_8sql__in.html#a592394d16acfe6382f721b8efa37debc">__get_feature_name</a> (int feature_index, text meta_tbl_name)</td></tr>
<tr class="separator:a592394d16acfe6382f721b8efa37debc"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a6f7558c509403b4d1693f9cf2ef35610"><td class="memItemLeft" align="right" valign="top">text&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="dt__preproc_8sql__in.html#a6f7558c509403b4d1693f9cf2ef35610">__get_column_value</a> (int column_index, int code, char column_type, text meta_tbl_name)</td></tr>
<tr class="separator:a6f7558c509403b4d1693f9cf2ef35610"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ab671b52e3bcbf06ff854266b297a5c8f"><td class="memItemLeft" align="right" valign="top">text&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="dt__preproc_8sql__in.html#ab671b52e3bcbf06ff854266b297a5c8f">__get_feature_value</a> (int feature_index, int code, text meta_tbl_name)</td></tr>
<tr class="separator:ab671b52e3bcbf06ff854266b297a5c8f"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a203a0f45da5e6117d253d45b2b72ee4e"><td class="memItemLeft" align="right" valign="top">text&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="dt__preproc_8sql__in.html#a203a0f45da5e6117d253d45b2b72ee4e">__get_id_column_name</a> (text meta_tbl_name)</td></tr>
<tr class="separator:a203a0f45da5e6117d253d45b2b72ee4e"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a303140fc756d5e53a606a82276902e8d"><td class="memItemLeft" align="right" valign="top">text&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="dt__preproc_8sql__in.html#a303140fc756d5e53a606a82276902e8d">__get_class_column_name</a> (text meta_tbl_name)</td></tr>
<tr class="separator:a303140fc756d5e53a606a82276902e8d"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a952d5d8db24ef2831cf290c6caec7e3d"><td class="memItemLeft" align="right" valign="top">text&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="dt__preproc_8sql__in.html#a952d5d8db24ef2831cf290c6caec7e3d">__get_class_value</a> (int code, text meta_tbl_name)</td></tr>
<tr class="separator:a952d5d8db24ef2831cf290c6caec7e3d"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:afae4bac25d825c359f6fc50ef0735ecd"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="dt__preproc_8sql__in.html#afae4bac25d825c359f6fc50ef0735ecd">__breakup_table</a> (text input_tbl_name, text breakup_tbl_name, text kv_cls_name, text id_col_name, text cls_col_name, text[] attr_col_names, bool[] is_conts, int h2hmv_routine_id, int verbosity)</td></tr>
<tr class="separator:afae4bac25d825c359f6fc50ef0735ecd"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aedf7411a752ea4505e725ff8dc9c07ef"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="dt__preproc_8sql__in.html#aedf7411a752ea4505e725ff8dc9c07ef">__gen_vertical_encoded_table</a> (text breakup_tbl_name, text enc_tbl_name, text kv_attr_name, bool is_tbl_tmp, int verbosity)</td></tr>
<tr class="separator:aedf7411a752ea4505e725ff8dc9c07ef"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a669cfeef954d60e81bd86b1b8adff066"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="dt__preproc_8sql__in.html#a669cfeef954d60e81bd86b1b8adff066">__gen_horizontal_encoded_table</a> (text hor_tbl_name, text ver_tbl_name, int attr_count, int verbosity)</td></tr>
<tr class="separator:a669cfeef954d60e81bd86b1b8adff066"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ad4ad4f439f9a24a9541548228fdcbd68"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="dt__preproc_8sql__in.html#ad4ad4f439f9a24a9541548228fdcbd68">__encode_columns</a> (text kv_attr_name, text breakup_tbl_name, int h2hmv_routine_id, int verbosity)</td></tr>
<tr class="separator:ad4ad4f439f9a24a9541548228fdcbd68"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ad7f67f799628b62cc9bf9feb3fc9d7d1"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="dt__preproc_8sql__in.html#ad7f67f799628b62cc9bf9feb3fc9d7d1">__encode_table</a> (text input_tbl_name, text id_col_name, text[] feature_names, text cls_col_name, text[] cont_attr_names, text enc_table_name, text meta_tbl_name, int h2hmv_routine_id, int verbosity)</td></tr>
<tr class="separator:ad7f67f799628b62cc9bf9feb3fc9d7d1"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a0f220ad406479dd08b61799ac5d3837d"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="dt__preproc_8sql__in.html#a0f220ad406479dd08b61799ac5d3837d">__encode_table</a> (text input_tbl_name, text enc_tbl_name, text meta_tbl_name, int h2hmv_routine_id, int verbosity)</td></tr>
<tr class="separator:a0f220ad406479dd08b61799ac5d3837d"><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 date"><dt>Date</dt><dd>July 19, 2012 </dd></dl>
</div><h2 class="groupheader">Function Documentation</h2>
<a class="anchor" id="afae4bac25d825c359f6fc50ef0735ecd"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void __breakup_table </td>
<td>(</td>
<td class="paramtype">text&#160;</td>
<td class="paramname"><em>input_tbl_name</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">text&#160;</td>
<td class="paramname"><em>breakup_tbl_name</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">text&#160;</td>
<td class="paramname"><em>kv_cls_name</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">text&#160;</td>
<td class="paramname"><em>id_col_name</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">text&#160;</td>
<td class="paramname"><em>cls_col_name</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">text[]&#160;</td>
<td class="paramname"><em>attr_col_names</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">bool[]&#160;</td>
<td class="paramname"><em>is_conts</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>h2hmv_routine_id</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>verbosity</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
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</div><div class="memdoc">
</div>
</div>
<a class="anchor" id="a5101cb7fa622adb504779a691b1b9b01"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void __create_metatable </td>
<td>(</td>
<td class="paramtype">text&#160;</td>
<td class="paramname"><em>meta_tbl_name</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
</div>
</div>
<a class="anchor" id="a436aa21412718984868087afca2c83ec"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int4 __distinct_feature_value </td>
<td>(</td>
<td class="paramtype">text&#160;</td>
<td class="paramname"><em>meta_tbl_name</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>feature_id</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
</div>
</div>
<a class="anchor" id="ae8236322b62a83dd2862aef0068b68d9"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void __drop_metatable </td>
<td>(</td>
<td class="paramtype">text&#160;</td>
<td class="paramname"><em>meta_tbl_name</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
</div>
</div>
<a class="anchor" id="ad4ad4f439f9a24a9541548228fdcbd68"></a>
<div class="memitem">
<div class="memproto">
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<td class="memname">void __encode_columns </td>
<td>(</td>
<td class="paramtype">text&#160;</td>
<td class="paramname"><em>kv_attr_name</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">text&#160;</td>
<td class="paramname"><em>breakup_tbl_name</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>h2hmv_routine_id</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>verbosity</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
</div>
</div>
<a class="anchor" id="ad7f67f799628b62cc9bf9feb3fc9d7d1"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
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<td class="memname">void __encode_table </td>
<td>(</td>
<td class="paramtype">text&#160;</td>
<td class="paramname"><em>input_tbl_name</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">text&#160;</td>
<td class="paramname"><em>id_col_name</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">text[]&#160;</td>
<td class="paramname"><em>feature_names</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">text&#160;</td>
<td class="paramname"><em>cls_col_name</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">text[]&#160;</td>
<td class="paramname"><em>cont_attr_names</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">text&#160;</td>
<td class="paramname"><em>enc_table_name</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">text&#160;</td>
<td class="paramname"><em>meta_tbl_name</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>h2hmv_routine_id</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>verbosity</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
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<td class="memname">void __encode_table </td>
<td>(</td>
<td class="paramtype">text&#160;</td>
<td class="paramname"><em>input_tbl_name</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">text&#160;</td>
<td class="paramname"><em>enc_tbl_name</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">text&#160;</td>
<td class="paramname"><em>meta_tbl_name</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>h2hmv_routine_id</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>verbosity</em>&#160;</td>
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<td>)</td>
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<td class="memname">void __gen_horizontal_encoded_table </td>
<td>(</td>
<td class="paramtype">text&#160;</td>
<td class="paramname"><em>hor_tbl_name</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">text&#160;</td>
<td class="paramname"><em>ver_tbl_name</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>attr_count</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>verbosity</em>&#160;</td>
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<td></td>
<td>)</td>
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<td class="memname">void __gen_vertical_encoded_table </td>
<td>(</td>
<td class="paramtype">text&#160;</td>
<td class="paramname"><em>breakup_tbl_name</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">text&#160;</td>
<td class="paramname"><em>enc_tbl_name</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">text&#160;</td>
<td class="paramname"><em>kv_attr_name</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">bool&#160;</td>
<td class="paramname"><em>is_tbl_tmp</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>verbosity</em>&#160;</td>
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<td></td>
<td>)</td>
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<td class="memname">text __get_class_column_name </td>
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<td class="paramtype">text&#160;</td>
<td class="paramname"><em>meta_tbl_name</em></td><td>)</td>
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<td class="memname">text __get_class_value </td>
<td>(</td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>code</em>, </td>
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<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">text&#160;</td>
<td class="paramname"><em>meta_tbl_name</em>&#160;</td>
</tr>
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<td></td>
<td>)</td>
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<td class="memname">text __get_classtable_name </td>
<td>(</td>
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<td class="paramname"><em>meta_tbl_name</em></td><td>)</td>
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<td class="memname">text __get_column_value </td>
<td>(</td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>column_index</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>code</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">char&#160;</td>
<td class="paramname"><em>column_type</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">text&#160;</td>
<td class="paramname"><em>meta_tbl_name</em>&#160;</td>
</tr>
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<td></td>
<td>)</td>
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<td class="memname">text __get_feature_name </td>
<td>(</td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>feature_index</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">text&#160;</td>
<td class="paramname"><em>meta_tbl_name</em>&#160;</td>
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<td>)</td>
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<td class="memname">text __get_feature_value </td>
<td>(</td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>feature_index</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>code</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">text&#160;</td>
<td class="paramname"><em>meta_tbl_name</em>&#160;</td>
</tr>
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<td>)</td>
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<td class="memname">text __get_id_column_name </td>
<td>(</td>
<td class="paramtype">text&#160;</td>
<td class="paramname"><em>meta_tbl_name</em></td><td>)</td>
<td></td>
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<td class="memname">void __insert_into_metatable </td>
<td>(</td>
<td class="paramtype">text&#160;</td>
<td class="paramname"><em>meta_tbl_name</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>col_index</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">text&#160;</td>
<td class="paramname"><em>column_name</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">char&#160;</td>
<td class="paramname"><em>column_type</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">boolean&#160;</td>
<td class="paramname"><em>is_cont</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">text&#160;</td>
<td class="paramname"><em>table_name</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>num_dist_value</em>&#160;</td>
</tr>
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<td></td>
<td>)</td>
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<td class="memname">int4 __num_of_class </td>
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<td class="paramname"><em>meta_tbl_name</em></td><td>)</td>
<td></td>
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<td class="memname">int4 __num_of_feature </td>
<td>(</td>
<td class="paramtype">text&#160;</td>
<td class="paramname"><em>meta_tbl_name</em></td><td>)</td>
<td></td>
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<td class="memname">void __validate_input_table </td>
<td>(</td>
<td class="paramtype">text&#160;</td>
<td class="paramname"><em>full_table_name</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">text[]&#160;</td>
<td class="paramname"><em>feature_columns</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">text&#160;</td>
<td class="paramname"><em>id_column</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">text&#160;</td>
<td class="paramname"><em>class_column</em>&#160;</td>
</tr>
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<td></td>
<td>)</td>
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<td class="memname">void __validate_metatable </td>
<td>(</td>
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<td class="paramname"><em>meta_tbl_name</em></td><td>)</td>
<td></td>
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