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<h1>9. SQL Procedure Language Guide</h1>
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<h2>9.17. Character Escaping</h2>
<p>
The C style escape character can be used to include special characters inside literals. The backslash character, '\', followed by an octal character code or
a special character provides a notation for characters that are normally not typable in a string literal such as tab or crlf.
Backslash support can be turned on or off at the statement level, the connection level or server default level.
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<h3>9.17.1. Statement Level</h3>
<p>
If you want to activate or deactivate the backslash support in a
stored procedure you can use the following two special comments (on a separate line) :
</p>
<div>
<pre class="programlisting">--no_c_escapes+</pre>
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<p>
turns the backslash escaping support off (insert into x values ('c:\test') will result in 'c:\test' in the column
</p>
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<pre class="programlisting">--no_c_escapes-</pre>
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turns the backslash escaping support on. (same as above will insert 'c:test' in the column.)
</p>
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<h3>9.17.2. Connection Level</h3>
<p>The switch SET SQL_NO_CHAR_C_ESCAPE can be set to 'on' or 'off' to respectively turn backslash support on or off
for the current connection</p>
<p>There is an ODBC connection attribute that can be set for the same effect in an ODBC connection.
SQLGetConnectAttr/SQLSetConnectAttr with option ID of 5002 takes values 0 or 1 to facilitate this
</p>
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<a name="backslashserver" />
<h3>9.17.3. Server Default</h3>
<p>SQL_NO_CHAR_C_ESCAPE=0/1 can be set in the "Client"
section of the virtuoso.ini file to set the connection default backslash handling behavior. The default value is 0.
</p>
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<div class="note">
<div class="notetitle">Note</div>
<p>When a 'create procedure' is executed and that mode is "ON" the
procedure is stored in such a way that it will preserve the setting for
it's text no matter what the current default is.
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