InterSystems IRIS tips @cachetips
InterSystems IRIS and Caché tips and hints Joined May 2014-
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To stop #InterSystemsIRIS instance quietly use iris halt INSTANCENAME
To highlight every occurrence of word in Studio right-click on this word and choose "Toogle Word Highlight" #intersystems #studio #caché #intersystemsIRIS
New transaction isolation level in Caché 2017.1: READ VERIFIED #intersystems #cache #SQL docs.intersystems.com/cache20171/csp…
New lightweight statistics on #SQL query #performance in #Intersystems #Caché 2017.1 docs.intersystems.com/cache20171/csp…
New documentation book in #InterSystems #Caché 2016.2 "Caché SQL Optimization Guide" #sql #performance docs.intersystems.com/cache20162/csp…
$system.AutoLock holds lockrefs and automatically releases them when the oref goes out of scope docs.intersystems.com/cache20141/csp… #intersystems #cache
$zdatetime(+$Horolog, 14) returns day number of the year. docs.intersystems.com/cache20152/csp… #intersystems #cache
Calculated property has no in-memory storage. Transient - no database storage. Distinguish them docs.intersystems.com/cache20152/csp… #intersystems #cache
Set Undefined to 2 if you want empty strings for undefined values instead of <UNDEFINED> errors. docs.intersystems.com/cache_latest/c… #intersystems #cache
TROLLBACK rolls back all transactions in progress. To roll back just current one use TROLLBACK 1 docs.intersystems.com/cache20152/csp… #intersystems #cache
$ListUpdate -- new function in Caché 2015.2 docs.intersystems.com/cache20152/csp… #intersystems #cache
For generating IDs in parallel processes use $Sequence instead of $Increment docs.intersystems.com/cache_latest/c… #intersystems #cache
On production systems set "Serve Files" in web-app settings to "Always and cached" docs.intersystems.com/cache_latest/c… #intersystems #cache #performance
If RLS-method %SecurityPolicy always returns one role, override default index %RLI #cache #intersystems #performance docs.intersystems.com/cache20151/csp…
How to tighten security for a Caché instance docs.intersystems.com/cache_latest/c… #intersystems #cache
"ccontrol stopstart instname" restarts Caché instance docs.intersystems.com/cache20141/csp… #intersystems #cache
JSON from SQL: write ##class(%ZEN.Auxiliary.jsonSQLProvider).%WriteJSONFromSQL("json", "SELECT * FROM Sample.Person") #intersystems #cache
You can SELECT into an array in &sql. E.g. &sql(SELECT *,%ID INTO :tflds() FROM Sample.Person ) docs.intersystems.com/cache20141/csp… #intersystems #cache
%VID can be used to page results of SQL query (similar to LIMIT or ROWNUM) docs.intersystems.com/cache20141/csp… #intersystems #cache
Template for new csp files is located in <cache-dir>/bin/Default.csp file docs.intersystems.com/cache20141/csp… #intersystems #cache
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