Update notes for 2018-09-24

content/posts/2018-09.md

@@ -434,5 +434,30 @@ sqlite> INSERT INTO items(id, views) VALUES(0, 7) ON CONFLICT(id) DO UPDATE SET
 - But when I deployed it on my Ubuntu 16.04 environment I realized Ubuntu's SQLite is old and doesn't support `UPSERT`, so my indexing doesn't work...
 - Apparently `UPSERT` came in SQLite 3.24.0 (2018-06-04), and Ubuntu 16.04 has 3.11.0
 - Ok this is hilarious, I manually downloaded the [libsqlite3 3.24.0 deb from Ubuntu 18.10 "cosmic"](https://packages.ubuntu.com/cosmic/libsqlite3-0) and installed it in Ubnutu 16.04 and now the Python `indexer.py` works
+- This is definitely a dirty hack, but the list of packages we use that depend on `libsqlite3-0` in Ubuntu 16.04 are actually pretty few:
+
+```
+# apt-cache rdepends --installed libsqlite3-0 | sort | uniq
+  gnupg2
+  libkrb5-26-heimdal
+  libnss3
+  libpython2.7-stdlib
+  libpython3.5-stdlib
+```
+
+- I wonder if I could work around this by detecting the SQLite library version, for example on Ubuntu 16.04 after I replaced the library:
+
+```
+# python3
+Python 3.5.2 (default, Nov 23 2017, 16:37:01) 
+[GCC 5.4.0 20160609] on linux
+Type "help", "copyright", "credits" or "license" for more information.
+>>> import sqlite3
+>>> print(sqlite3.sqlite_version)
+3.24.0
+```
+
+- Or maybe I should just bite the bullet and migrate this to PostgreSQL, as it [supports `UPSERT` since version 9.5](https://wiki.postgresql.org/wiki/UPSERT) and also seems to have my new favorite `LIMIT` and `OFFSET`
+- I changed the syntax of the SQLite stuff and PostgreSQL is working flawlessly with psycopg2... hmmm.
 
 <!-- vim: set sw=2 ts=2: -->

docs/2018-09/index.html

@@ -18,7 +18,7 @@ I’m testing the new DSpace 5.8 branch in my Ubuntu 18.04 environment and I
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 <meta property="og:url" content="https://alanorth.github.io/cgspace-notes/2018-09/" /><meta property="article:published_time" content="2018-09-02T09:55:54&#43;03:00"/>
-<meta property="article:modified_time" content="2018-09-24T16:24:35&#43;03:00"/>
+<meta property="article:modified_time" content="2018-09-24T16:35:43&#43;03:00"/>
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 <meta name="twitter:title" content="September, 2018"/>
 <meta name="twitter:description" content="2018-09-02
@@ -41,9 +41,9 @@ I&rsquo;m testing the new DSpace 5.8 branch in my Ubuntu 18.04 environment and I
   "@type": "BlogPosting",
   "headline": "September, 2018",
   "url": "https://alanorth.github.io/cgspace-notes/2018-09/",
-  "wordCount": "3180",
+  "wordCount": "3318",
   "datePublished": "2018-09-02T09:55:54&#43;03:00",
-  "dateModified": "2018-09-24T16:24:35&#43;03:00",
+  "dateModified": "2018-09-24T16:35:43&#43;03:00",
   "author": {
     "@type": "Person",
     "name": "Alan Orth"
@@ -612,6 +612,33 @@ sqlite&gt; INSERT INTO items(id, views) VALUES(0, 7) ON CONFLICT(id) DO UPDATE S
 <li>But when I deployed it on my Ubuntu 16.04 environment I realized Ubuntu&rsquo;s SQLite is old and doesn&rsquo;t support <code>UPSERT</code>, so my indexing doesn&rsquo;t work&hellip;</li>
 <li>Apparently <code>UPSERT</code> came in SQLite 3.24.0 (2018-06-04), and Ubuntu 16.04 has 3.11.0</li>
 <li>Ok this is hilarious, I manually downloaded the <a href="https://packages.ubuntu.com/cosmic/libsqlite3-0">libsqlite3 3.24.0 deb from Ubuntu 18.10 &ldquo;cosmic&rdquo;</a> and installed it in Ubnutu 16.04 and now the Python <code>indexer.py</code> works</li>
+<li>This is definitely a dirty hack, but the list of packages we use that depend on <code>libsqlite3-0</code> in Ubuntu 16.04 are actually pretty few:</li>
+</ul>
+
+<pre><code># apt-cache rdepends --installed libsqlite3-0 | sort | uniq
+  gnupg2
+  libkrb5-26-heimdal
+  libnss3
+  libpython2.7-stdlib
+  libpython3.5-stdlib
+</code></pre>
+
+<ul>
+<li>I wonder if I could work around this by detecting the SQLite library version, for example on Ubuntu 16.04 after I replaced the library:</li>
+</ul>
+
+<pre><code># python3
+Python 3.5.2 (default, Nov 23 2017, 16:37:01) 
+[GCC 5.4.0 20160609] on linux
+Type &quot;help&quot;, &quot;copyright&quot;, &quot;credits&quot; or &quot;license&quot; for more information.
+&gt;&gt;&gt; import sqlite3
+&gt;&gt;&gt; print(sqlite3.sqlite_version)
+3.24.0
+</code></pre>
+
+<ul>
+<li>Or maybe I should just bite the bullet and migrate this to PostgreSQL, as it <a href="https://wiki.postgresql.org/wiki/UPSERT">supports <code>UPSERT</code> since version 9.5</a> and also seems to have my new favorite <code>LIMIT</code> and <code>OFFSET</code></li>
+<li>I changed the syntax of the SQLite stuff and PostgreSQL is working flawlessly with psycopg2&hellip; hmmm.</li>
 </ul>
 
 <!-- vim: set sw=2 ts=2: -->

docs/sitemap.xml

@@ -4,7 +4,7 @@
   
   <url>
     <loc>https://alanorth.github.io/cgspace-notes/2018-09/</loc>
-    <lastmod>2018-09-24T16:24:35+03:00</lastmod>
+    <lastmod>2018-09-24T16:35:43+03:00</lastmod>
   </url>
   
   <url>
@@ -184,7 +184,7 @@
   
   <url>
     <loc>https://alanorth.github.io/cgspace-notes/</loc>
-    <lastmod>2018-09-24T16:24:35+03:00</lastmod>
+    <lastmod>2018-09-24T16:35:43+03:00</lastmod>
     <priority>0</priority>
   </url>
   
@@ -195,7 +195,7 @@
   
   <url>
     <loc>https://alanorth.github.io/cgspace-notes/tags/notes/</loc>
-    <lastmod>2018-09-24T16:24:35+03:00</lastmod>
+    <lastmod>2018-09-24T16:35:43+03:00</lastmod>
     <priority>0</priority>
   </url>
   
@@ -207,13 +207,13 @@
   
   <url>
     <loc>https://alanorth.github.io/cgspace-notes/posts/</loc>
-    <lastmod>2018-09-24T16:24:35+03:00</lastmod>
+    <lastmod>2018-09-24T16:35:43+03:00</lastmod>
     <priority>0</priority>
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   <url>
     <loc>https://alanorth.github.io/cgspace-notes/tags/</loc>
-    <lastmod>2018-09-24T16:24:35+03:00</lastmod>
+    <lastmod>2018-09-24T16:35:43+03:00</lastmod>
     <priority>0</priority>
   </url>