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<div class="chapter">
<div class="titlepage"><div><div><h2 class="title">
<a name="init_config"></a>Initialization and configuration</h2></div></div></div>
<div class="toc"><dl class="toc">
<dt>
<span class="refentrytitle"><a href="libgda-5.0-Libgda-Initialization.html">Library initialization</a></span><span class="refpurpose"> — Library initialization and information</span>
</dt>
<dt>
<span class="refentrytitle"><a href="libgda-5.0-Configuration.html">Configuration</a></span><span class="refpurpose"> — Access/Management of libgda configuration</span>
</dt>
<dt><span class="sect1"><a href="init_config.html#libgda_env_variables">Configuring <span class="application">Libgda</span> with environment variables</a></span></dt>
</dl></div>
<p>Configuration examples are given in <a class="link" href="installation-configuring.html" title="Configuring">this introduction section</a></p>
<div class="sect1">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="libgda_env_variables"></a>Configuring <span class="application">Libgda</span> with environment variables</h2></div></div></div>
<p>Some functional aspects of <span class="application">Libgda</span> can be configured using environment variables which are
listed here:
</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem"><p>GDA_CONNECTION_EVENTS_SHOW: if set, then lists the type of events which must be displayed on STDOUT
(event types are NOTICE, COMMAND, WARNING, ERROR, the variable can contain a list of types separated by
colons, commas or spaces)</p></li>
<li class="listitem"><p>GDA_PROVIDERS_ROOT_DIR: if set, must point to the directory where the providers files are (providers
files are shared libraries)</p></li>
<li class="listitem"><p>LIBGDA_NO_THREADS (useless since version 5.2.0): if set, then multi threading will be disabled (see the
<a class="link" href="limitations.html#threads" title="Multi threaded environment">section about multi threading</a> for more information about
<span class="application">Libgda</span> threads' support). Please note that this environment variables is not used anymore
since version 5.2.0, as threading is always enabled by Glib.</p></li>
<li class="listitem"><p>GDA_SHOW_PROVIDER_LOADING_ERROR: if set, then in case a provider fails to be loaded (usually because
it requires a library which can't be found) <span class="application">Libgda</span> will display a warning message. This variable
is useful to debug the absence of a provider at runtime</p></li>
<li class="listitem"><p>GDA_DATA_MODEL_DUMP_TITLE: if set, then <a class="link" href="GdaDataModel.html#gda-data-model-dump" title="gda_data_model_dump ()">gda_data_model_dump()</a>
will also output the name of the data model as its first line</p></li>
<li class="listitem"><p>GDA_DATA_MODEL_DUMP_ROW_NUMBERS: if set, then
<a class="link" href="GdaDataModel.html#gda-data-model-dump" title="gda_data_model_dump ()">gda_data_model_dump()</a> will prepend a column containing row
numbers</p></li>
<li class="listitem"><p>GDA_DATA_MODEL_NULL_AS_EMPTY: if set, then
<a class="link" href="GdaDataModel.html#gda-data-model-dump" title="gda_data_model_dump ()">gda_data_model_dump()</a> will show an empty ("") string
for NULL values, instead of the "NULL" string</p></li>
<li class="listitem"><p>GDA_DATA_MODEL_DUMP_TRUNCATE: if set to a numeric value, then
<a class="link" href="GdaDataModel.html#gda-data-model-dump" title="gda_data_model_dump ()">gda_data_model_dump()</a> will truncates the output to the width specified by the value. If the value is -1 then the actual terminal size (if it can be determined) is used</p></li>
<li class="listitem"><p>GDA_DATA_MODEL_DUMP_ATTRIBUTES: if set, then
<a class="link" href="GdaDataModel.html#gda-data-model-dump" title="gda_data_model_dump ()">gda_data_model_dump()</a> will also include a description of
the data model's attributes</p></li>
<li class="listitem"><p>GDA_CONFIG_SYNCHRONOUS: if set, and if the Gnome Keyring is used to store DSN authentification information,
then the requests to the Gnome Keyring will be made synchronously. This is useful if Libgda is used in a program where
there is no main loop (otherwise no authentification will be fetched).</p></li>
<li class="listitem"><p>GDA_TREE_DUMP_ALL_ATTRIBUTES: if set, then
<a class="link" href="GdaTree.html#gda-tree-dump" title="gda_tree_dump ()">gda_tree_dump()</a> will dump all the attributes of each
node in the tree</p></li>
<li class="listitem"><p>GDAUI_SHOW_PLUGINS_LOADING: if set, then a trace of Gda UI's plugins loading will be
output the first time they are loaded.
</p></li>
</ul></div>
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