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--- scratchpad:random_magic_spells [2016/05/10 16:17] – Change REGEXP_REPLACE/BTRIM combo with ARRAY_TO_STRING tsbere
+++ scratchpad:random_magic_spells [2022/02/10 13:34] (current) – external edit 127.0.0.1
@@ Line 228: / Line 228: @@
 netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect"); JSAN.use('util.file'); var f = new util.file('ws_info'); alert(f._file.path);
 </code>
+====== Performance ======
+=====Preload Your database into RAM=====
+Find your database's oid and make a note of it:
+<code>
+psql -U evergreen -h localhost -d postgres -c "select oid from pg_database where datname = 'evergreen'"
+</code>
+Then, as the root or postgres user, run the following commands
+<code>
+cd /var/lib/postgresql/${pgversion}/main/base/${oid}
+cat * > /dev/null
+</code>
+Replace ${pgversion} with your PostgreSQL version number, ex. 9.5.  Replace ${oid} with the number returned by the database query.
 ====== Utility ======
@@ Line 464: / Line 479: @@
 ===== Generating a SQL report with natural titles =====
-While the reporter.materialized_simple_record view is convenient, sometimes those all-lowercase titles are annoying (for example, in shelf list reports that you're preparing for public consumption). In those cases, a little XPATH can go a long way--but you need to correct for the XML array that XPATH() returns, which you can do with a nice little BTRIM() / REGEXP_REPLACE() hack like the following:
+While the reporter.materialized_simple_record view is convenient, sometimes those all-lowercase titles are annoying (for example, in shelf list reports that you're preparing for public consumption). In those cases, a little XPATH can go a long way--but you need to correct for the XML array that XPATH() returns, which you can do with ARRAY_TO_STRING() like the following:
 <code sql>
@@ Line 539: / Line 554: @@
 ;
 </code>
+=====Show statistic usage on reports===
+<code sql>
+select thecount.name,create_time,thecount.lasttime,thecount.count from
+reporter.template rt,
+(
+select rtinner.name "name",max(run_time) "lasttime",count(*) "count" from reporter.schedule rs,reporter.report rr,
+(select naming.name,string_agg(clones.id||'',',') ids from
+reporter.template naming ,
+reporter.template clones
+where
+clones.data=naming.data and
+naming.folder in(select id from reporter.template_folder where owner= !!!REPLACE ME WITH OWNER ID!!! and shared and share_with=1) and
+naming.owner=  !!!REPLACE ME WITH OWNER ID!!!
+group by 1
+) rtinner
+where rr.template = any(('{'||rtinner.ids||'}')::int[]) and rr.id=rs.report
+group by 1
+) as thecount
+where
+thecount.name = rt.name and
+rt.owner=  !!!REPLACE ME WITH OWNER ID!!!  and
+rt.folder in(select id from reporter.template_folder where owner= !!!REPLACE ME WITH OWNER ID!!! and shared and share_with=1)
+order by 4 desc
+</code>
+You will need to edit that query to look for reports owned by a particular actor.usr.id. Replace "!!!REPLACE ME WITH OWNER ID!!!" with the ID number. This is useful when you have centralized report templates for everyone to use. It also takes into account cloned reports from the same source template!
 ====== Development ======
@@ Line 662: / Line 709: @@
 </code>
+=====Getting a hierarchically-ordered list of org units=====
+<code sql>
+-- breadth-first (i.e. all first-level org units, then all second-level OUs, etc.)
+WITH RECURSIVE orgs AS
+(
+  SELECT id, shortname, name, parent_ou
+  FROM actor.org_unit
+  WHERE parent_ou IS NULL
+  UNION ALL
+  SELECT next.id, next.shortname, next.name, next.parent_ou
+  FROM actor.org_unit next
+  JOIN orgs prev ON next.parent_ou = prev.id
+)
+SELECT id, shortname, name, parent_ou
+FROM orgs;
+-- depth-first ("expanded tree" order, as in most org selector dropdown menus)
+WITH RECURSIVE orgs AS
+(
+  SELECT id, shortname, name, parent_ou, array[id] AS path
+  FROM actor.org_unit
+  WHERE parent_ou IS NULL
+  UNION
+  SELECT next.id, next.shortname, next.name, next.parent_ou, (prev.path || next.id) AS path
+  FROM actor.org_unit next
+  JOIN orgs prev ON next.parent_ou = prev.id
+)
+SELECT id, shortname, name, parent_ou
+FROM orgs ORDER BY path;
+</code>
 ====== Cstore/json_query tips and tricks ======
@@ Line 770: / Line 847: @@
 Thank you Jeff Godin for this tip!
-====== Clear cached catalog search results ======
+===== Clear cached catalog search results =====
 Similar to the spell above, this can be used to clear all cached catalog search results and facets from memcached. This ordinarily isn't needed for production use, but can be useful when testing tweaks to search code or settings.