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<title>MADlib: crf_data_loader.sql_in File Reference</title>
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<div id="projectbrief">User Documentation for Apache MADlib</div>
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<a href="#func-members">Functions</a> </div>
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<div class="title">crf_data_loader.sql_in File Reference</div> </div>
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<div class="contents">
<p>Create database tables and import POS/NER training/testing data to the database.
<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:aaa609ec1d1d4cff0f335fa358091d5c3"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="crf__data__loader_8sql__in.html#aaa609ec1d1d4cff0f335fa358091d5c3">crf_train_data</a> (text datapath)</td></tr>
<tr class="separator:aaa609ec1d1d4cff0f335fa358091d5c3"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:abf2a39a0b84a5e7ae215db28b3a87f81"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="crf__data__loader_8sql__in.html#abf2a39a0b84a5e7ae215db28b3a87f81">crf_test_data</a> (text datapath)</td></tr>
<tr class="separator:abf2a39a0b84a5e7ae215db28b3a87f81"><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>Feb. 2012 </dd></dl>
</div><h2 class="groupheader">Function Documentation</h2>
<a id="abf2a39a0b84a5e7ae215db28b3a87f81"></a>
<h2 class="memtitle"><span class="permalink"><a href="#abf2a39a0b84a5e7ae215db28b3a87f81">&#9670;&nbsp;</a></span>crf_test_data()</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void crf_test_data </td>
<td>(</td>
<td class="paramtype">text&#160;</td>
<td class="paramname"><em>datapath</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<dl class="section user"><dt>Input</dt><dd></dd></dl>
<ol type="1">
<li>Prepare an input test data segment table, e.g.:</li>
</ol>
<ul>
<li>CREATE TABLE test_segmenttbl (start_pos integer,doc_id integer,seg_text text, max_pos integer) <pre class="fragment">sql&gt; select * from test_segmenttbl order by doc_id, start_pos;
start_pos | doc_id | seg_text | max_pos
----------+---------+--------------+-------------
0 | 1 | the | 26
1 | 1 | madlib | 26
2 | 1 | mission | 26
3 | 1 | : | 26
4 | 1 | to | 26
5 | 1 | foster | 26
6 | 1 | widespread | 26
7 | 1 | development | 26
8 | 1 | of | 26
9 | 1 | scalable | 26
10 | 1 | analytic | 26
11 | 1 | skills | 26
12 | 1 | , | 26
13 | 1 | by | 26
...
24 | 1 | open-source | 26
25 | 1 | development | 26
26 | 1 | . | 26
</pre></li>
</ul>
<dl class="section user"><dt>Usage</dt><dd><ul>
<li>create tables and import data to the database SELECT madlib.crf_test_data('/path/to/modeldata') </li>
</ul>
</dd></dl>
</div>
</div>
<a id="aaa609ec1d1d4cff0f335fa358091d5c3"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aaa609ec1d1d4cff0f335fa358091d5c3">&#9670;&nbsp;</a></span>crf_train_data()</h2>
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<div class="memproto">
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<td class="memname">void crf_train_data </td>
<td>(</td>
<td class="paramtype">text&#160;</td>
<td class="paramname"><em>datapath</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<dl class="section user"><dt>Input</dt><dd></dd></dl>
<ol type="1">
<li>Prepare an input train data segment table, e.g.:</li>
</ol>
<ul>
<li>CREATE TABLE train_segmenttbl (start_pos integer,doc_id integer,seg_text text, max_pos integer) <pre class="fragment">sql&gt; select * from train_segmenttbl order by doc_id, start_pos;
start_pos | doc_id | seg_text | max_pos
----------+---------+--------------+-------------
0 | 1 | madlib | 9
1 | 1 | is | 9
2 | 1 | an | 9
3 | 1 | open-source | 9
4 | 1 | library | 9
5 | 1 | for | 9
6 | 1 | scalable | 9
7 | 1 | in-database | 9
8 | 1 | analytics | 9
9 | 1 | . | 9
0 | 2 | it | 16
1 | 2 | provides | 16
2 | 2 |data-parallel | 16
3 | 2 |implementations| 16
...
14 | 2 | unstructured | 16
15 | 2 | data | 16
16 | 2 | . | 16
</pre></li>
</ul>
<ol type="1">
<li>Prepare an input dictionary table, e.g.,:</li>
</ol>
<ul>
<li>CREATE TABLE crf_dictionary (token text,token_id integer,label text,count integer,total integer) <pre class="fragment">sql&gt; select * from crf_dictionary;
token | label | count | total
------------+--------+--------------
freefall | 11 | 1 | 1
policy | 11 | 2 | 2
measures | 12 | 1 | 1
commitment | 11 | 1 | 1
new | 6 | 1 | 1
speech | 11 | 1 | 1
's | 16 | 2 | 2
reckon | 30 | 1 | 1
underlying | 28 | 1 | 1
...
</pre></li>
</ul>
<ol type="1">
<li>Prepare an input label table, e.g.,:</li>
</ol>
<ul>
<li>CREATE TABLE labeltbl (id integer,label character varying) <pre class="fragment">sql&gt; select * from labeltbl order by id;
id | label
------------+--------
0 | CC
1 | CD
2 | DT
3 | EX
4 | FW
5 | IN
6 | JJ
...
42 | ,
43 | .
44 | :
</pre></li>
</ul>
<ol type="1">
<li>Prepare an input regex table, e.g.,:</li>
</ol>
<ul>
<li>CREATE TABLE crf_regex (pattern text,name text) <pre class="fragment">sql&gt; select * from crf_regex;
pattern | name
------------- +---------------
^[A-Z][a-z]+$ | InitCapital%
^[A-Z]+$ | isAllCapital%
^.*[0-9]+.*$ | containsDigit%
^.+[.]$ | endsWithDot%
^.+[,]$ | endsWithComma%
^.+er$ | endsWithER%
^.+est$ | endsWithEst%
^.+ed$ | endsWithED%
...
</pre></li>
</ul>
<ol type="1">
<li>Prepare an input feature table, e.g.,:</li>
</ol>
<ul>
<li>CREATE TABLE featuretbl (id integer,name text,prev_label_id integer,label_id integer,weight float) <pre class="fragment">sql&gt; select * from featuretbl order by id;
id | name | prev_label_id | label_id | weight
-------------------------------------------------------
1 | W_chancellor | -1 | 13 | 2.2322
2 | E.13 | 13 | 5 | 2.3995
3 | U | -1 | 5 | 1.2164
4 | W_of | -1 | 5 | 2.8744
5 | E.5 | 5 | 2 | 3.7716
6 | W_the | -1 | 2 | 4.1790
7 | E.2 | 2 | 13 | 0.8957
...
</pre></li>
</ul>
<ol type="1">
<li>Prepare an crf feature set table, e.g.,:</li>
</ol>
<ul>
<li>CREATE TABLE madlib.crf_feature_dic(f_index integer, f_name text, feature integer[]) <pre class="fragment">sql&gt; select * from crf_feature_dic order by id;
f_index| f_name | feature
--------------------------------
0 | W_chancellor | -1
1 | E.13 | 13
2 | U | -1
3 | W_of | -1
4 | E.5 | 5
5 | W_the | -1
...
</pre></li>
</ul>
<dl class="section user"><dt>Usage</dt><dd><ul>
<li>create tables and import data to the database SELECT madlib.crf_train_data('/path/to/modeldata') </li>
</ul>
</dd></dl>
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