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<p class="MsoNormal"><span style="font-size:11.0pt">Thanks Even, that’s what I suspected.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal">Best,<o:p></o:p></p>
<p class="MsoNormal">Jesse<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Lead Computer Scientist<o:p></o:p></p>
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<p class="MsoNormal">Science Systems and Applications, Inc.<o:p></o:p></p>
<p class="MsoNormal">Dr Compton Tucker Team<o:p></o:p></p>
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<p class="MsoNormal">NASA Goddard Space Flight Center<span style="font-size:11.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="color:black">From:
</span></b><span style="color:black">Even Rouault <even.rouault@spatialys.com><br>
<b>Date: </b>Thursday, July 3, 2025 at 4:23</span><span style="font-family:"Arial",sans-serif;color:black"> </span><span style="color:black">PM<br>
<b>To: </b>Meyer, Jesse R. (GSFC-618.0)[SCIENCE SYSTEMS AND APPLICATIONS INC] <jesse.r.meyer@nasa.gov>, gdal dev <gdal-dev@lists.osgeo.org><br>
<b>Subject: </b>[EXTERNAL] Re: [gdal-dev] Possible to issue sqlite3_limit with "memory" OGR driver?<o:p></o:p></span></p>
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<b><span style="color:black">CAUTION:</span></b><span style="color:black"> This email originated from outside of NASA. Please take care when clicking links or opening attachments. Use the "Report Message" button to report suspicious messages to the NASA SOC.
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<p>Jesse,<o:p></o:p></p>
<p>Maybe you use SQL with the SQLite dialect? Otherwise we lack context to tell why you get SQLite kicking it.<o:p></o:p></p>
<p>I don't think sqlite3_limit() would really help you here, givenit can be used to grow settings beyond the compile time default which is 1 GiB I believe ("Attempts to increase a limit above its hard upper bound are silently truncated to the hard upper bound.").
You would need to recompile SQLite itself.<o:p></o:p></p>
<p>Even<o:p></o:p></p>
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<p class="MsoNormal">Le 03/07/2025 à 22:14, Meyer, Jesse R. (GSFC-618.0)[SCIENCE SYSTEMS AND APPLICATIONS INC] via gdal-dev a écrit :<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt">We’re trying to gdal.Polygonize a feature that exceeds SQLite’s default blob size of 1,000,000,000 bytes. Curiously, we’re using the memory dataset, but this appears to leverage SQLite under the hood (evidenced
by the error message: ERROR 1: In GetNextRawFeature(): sqlite3_step() : string or blob too big). SQLite docs state the that limit can be changed at runtime using the
<a href="https://www.sqlite.org/c3ref/limit.html">sqlite3_limit</a>(db,<a href="https://www.sqlite.org/c3ref/c_limit_attached.html#sqlitelimitlength">SQLITE_LIMIT_LENGTH</a>,...) interface. Maybe there could be some way to leverage PRELUDE_STATEMENTS to achieve
this but we are not “opening” a dataset - we’re creating one directly from the memory driver.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">What is the best way to work around this?</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
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<p class="MsoNormal">Best,<o:p></o:p></p>
<p class="MsoNormal">Jesse<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Lead Computer Scientist<o:p></o:p></p>
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<p class="MsoNormal">Science Systems and Applications, Inc.<o:p></o:p></p>
<p class="MsoNormal">Dr Compton Tucker Team<o:p></o:p></p>
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<p class="MsoNormal">NASA Goddard Space Flight Center<o:p></o:p></p>
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<o:p></o:p></p>
<pre>_______________________________________________<o:p></o:p></pre>
<pre>gdal-dev mailing list<o:p></o:p></pre>
<pre><a href="mailto:gdal-dev@lists.osgeo.org">gdal-dev@lists.osgeo.org</a><o:p></o:p></pre>
<pre><a href="https://lists.osgeo.org/mailman/listinfo/gdal-dev">https://lists.osgeo.org/mailman/listinfo/gdal-dev</a><o:p></o:p></pre>
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<pre>-- <o:p></o:p></pre>
<pre><a href="http://www.spatialys.com/">http://www.spatialys.com</a><o:p></o:p></pre>
<pre>My software is free, but my time generally not.<o:p></o:p></pre>
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