http://uralbash.ru/blog/tag/plpython/atom.xml 2013-07-22T18:17:00Z ABlog http://uralbash.ru/articles/2013/hstore_plpython/ 2013-07-22T18:17:00Z 2013-07-22T18:17:00Z Uralbash <div class="section" id="hstore-plpython"> <p>Приведу просто пример триггера на <code class="docutils literal"><span class="pre">plpython</span></code> который использует данные из поля <code class="docutils literal"><span class="pre">hstore</span></code>:</p> <div class="highlight-python"><div class="highlight"><pre><span></span><span class="k">if</span> <span class="n">TD</span><span class="p">[</span><span class="s2">&quot;event&quot;</span><span class="p">]</span> <span class="ow">in</span> <span class="p">(</span><span class="s2">&quot;INSERT&quot;</span><span class="p">,</span> <span class="s2">&quot;UPDATE&quot;</span><span class="p">):</span> <span class="n">obj_id</span> <span class="o">=</span> <span class="n">TD</span><span class="p">[</span><span class="s2">&quot;new&quot;</span><span class="p">][</span><span class="s2">&quot;id&quot;</span><span class="p">]</span> <span class="n">data</span> <span class="o">=</span> <span class="n">TD</span><span class="p">[</span><span class="s2">&quot;new&quot;</span><span class="p">][</span><span class="s2">&quot;data&quot;</span><span class="p">]</span> <span class="n">prepare_data</span> <span class="o">=</span> <span class="n">plpy</span><span class="o">.</span><span class="n">prepare</span><span class="p">(</span><span class="s2">&quot;SELECT hstore($1)-&gt;$2 as val;&quot;</span><span class="p">,</span> <span class="p">[</span><span class="s2">&quot;character varying&quot;</span><span class="p">,</span> <span class="s2">&quot;character varying&quot;</span><span class="p">])</span> <span class="n">param1</span> <span class="o">=</span> <span class="n">plpy</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="n">prepare_data</span><span class="p">,</span> <span class="p">[</span><span class="n">data</span><span class="p">,</span> <span class="s2">&quot;param1&quot;</span><span class="p">])[</span><span class="mi">0</span><span class="p">][</span><span class="s1">&#39;val&#39;</span><span class="p">]</span> <span class="n">param2</span> <span class="o">=</span> <span class="n">plpy</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="n">prepare_data</span><span class="p">,</span> <span class="p">[</span><span class="n">data</span><span class="p">,</span> <span class="s2">&quot;param2&quot;</span><span class="p">])[</span><span class="mi">0</span><span class="p">][</span><span class="s1">&#39;val&#39;</span><span class="p">]</span> <span class="n">param3</span> <span class="o">=</span> <span class="n">plpy</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="n">prepare_data</span><span class="p">,</span> <span class="p">[</span><span class="n">data</span><span class="p">,</span> <span class="s2">&quot;param3&quot;</span><span class="p">])[</span><span class="mi">0</span><span class="p">][</span><span class="s1">&#39;val&#39;</span><span class="p">]</span> <span class="n">param4</span> <span class="o">=</span> <span class="n">plpy</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="n">prepare_data</span><span class="p">,</span> <span class="p">[</span><span class="n">data</span><span class="p">,</span> <span class="s2">&quot;param4&quot;</span><span class="p">])[</span><span class="mi">0</span><span class="p">][</span><span class="s1">&#39;val&#39;</span><span class="p">]</span> </pre></div> </div> <p>Вот так я получаю параметры из <code class="docutils literal"><span class="pre">hstore</span></code>, вместо <code class="docutils literal"><span class="pre">TD[&quot;new&quot;][&quot;data&quot;][&quot;param1&quot;]</span></code>. Может я что то делаю не так?</p> </div>