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Add notes for 2022-05-05

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@ -43,4 +43,41 @@ categories: ["Notes"]
- Run all system updates on AReS server, update all Docker containers, and restart the server
- Start a harvest on AReS
## 2022-05-05
- Update PostgreSQL JDBC driver to 42.3.5 in the Ansible infrastructure playbooks and deploy on DSpace Test
- Peter asked me how many items we add to CGSpace every year
- I wrote a SQL query to check the number of items grouped by their accession dates since 2009:
```console
localhost/dspacetest= ☘ SELECT EXTRACT(year from text_value::date) AS YYYY, COUNT(*) FROM metadatavalue WHERE metadata_field_id=11 GROUP BY YYYY ORDER BY YYYY DESC LIMIT 14;
yyyy │ count
──────┼───────
2022 │ 2073
2021 │ 6471
2020 │ 4074
2019 │ 7330
2018 │ 8899
2017 │ 6860
2016 │ 8451
2015 │ 15692
2014 │ 16479
2013 │ 4388
2012 │ 6472
2011 │ 2694
2010 │ 2457
2009 │ 293
```
- Note that I had an issue with casting `text_value` to date because one item had an accession date of `2016` instead of `2016-09-29T20:14:47Z`
- Once I fixed that PostgreSQL was able to [extract() the year](https://www.postgresql.org/docs/12/functions-datetime.html#FUNCTIONS-DATETIME-EXTRACT)
- There were some other methods I tried that worked also, for example `TO_DATE()`:
```console
localhost/dspacetest= ☘ SELECT EXTRACT(year from TO_DATE(text_value, 'YYYY-MM-DD"T"HH24:MI:SS"Z"')) AS YYYY, COUNT(*) FROM metadatavalue WHERE metadata_field_id=11 GROUP BY YYYY ORDER BY YYYY DESC LIMIT 14;
```
- But it seems PostgreSQL is smart enough to recognize date formatting in strings automatically when we cast so we don't need to convert to date first
- Another thing I noticed is that a few hundred items have accession dates from decades ago, perhaps this is due to importing items from the CGIAR Library?
<!-- vim: set sw=2 ts=2: -->

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"@type": "BlogPosting",
"headline": "May, 2022",
"url": "https://alanorth.github.io/cgspace-notes/2022-05/",
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"datePublished": "2022-05-04T09:13:39+03:00",
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</ul>
</li>
</ul>
<h2 id="2022-05-05">2022-05-05</h2>
<ul>
<li>Update PostgreSQL JDBC driver to 42.3.5 in the Ansible infrastructure playbooks and deploy on DSpace Test</li>
<li>Peter asked me how many items we add to CGSpace every year
<ul>
<li>I wrote a SQL query to check the number of items grouped by their accession dates since 2009:</li>
</ul>
</li>
</ul>
<div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-console" data-lang="console"><span style="display:flex;"><span>localhost/dspacetest= ☘ SELECT EXTRACT(year from text_value::date) AS YYYY, COUNT(*) FROM metadatavalue WHERE metadata_field_id=11 GROUP BY YYYY ORDER BY YYYY DESC LIMIT 14;
</span></span><span style="display:flex;"><span> yyyy │ count
</span></span><span style="display:flex;"><span>──────┼───────
</span></span><span style="display:flex;"><span> 2022 │ 2073
</span></span><span style="display:flex;"><span> 2021 │ 6471
</span></span><span style="display:flex;"><span> 2020 │ 4074
</span></span><span style="display:flex;"><span> 2019 │ 7330
</span></span><span style="display:flex;"><span> 2018 │ 8899
</span></span><span style="display:flex;"><span> 2017 │ 6860
</span></span><span style="display:flex;"><span> 2016 │ 8451
</span></span><span style="display:flex;"><span> 2015 │ 15692
</span></span><span style="display:flex;"><span> 2014 │ 16479
</span></span><span style="display:flex;"><span> 2013 │ 4388
</span></span><span style="display:flex;"><span> 2012 │ 6472
</span></span><span style="display:flex;"><span> 2011 │ 2694
</span></span><span style="display:flex;"><span> 2010 │ 2457
</span></span><span style="display:flex;"><span> 2009 │ 293
</span></span></code></pre></div><ul>
<li>Note that I had an issue with casting <code>text_value</code> to date because one item had an accession date of <code>2016</code> instead of <code>2016-09-29T20:14:47Z</code>
<ul>
<li>Once I fixed that PostgreSQL was able to <a href="https://www.postgresql.org/docs/12/functions-datetime.html#FUNCTIONS-DATETIME-EXTRACT">extract() the year</a></li>
<li>There were some other methods I tried that worked also, for example <code>TO_DATE()</code>:</li>
</ul>
</li>
</ul>
<div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-console" data-lang="console"><span style="display:flex;"><span>localhost/dspacetest= ☘ SELECT EXTRACT(year from TO_DATE(text_value, &#39;YYYY-MM-DD&#34;T&#34;HH24:MI:SS&#34;Z&#34;&#39;)) AS YYYY, COUNT(*) FROM metadatavalue WHERE metadata_field_id=11 GROUP BY YYYY ORDER BY YYYY DESC LIMIT 14;
</span></span></code></pre></div><ul>
<li>But it seems PostgreSQL is smart enough to recognize date formatting in strings automatically when we cast so we don&rsquo;t need to convert to date first</li>
<li>Another thing I noticed is that a few hundred items have accession dates from decades ago, perhaps this is due to importing items from the CGIAR Library?</li>
</ul>
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