Kyle lists common problems and their solutions_ 7 reasons a query returns no data _ intersystems developer community

So I know it’s been a while, and I hate to let my adoring fans down… Database naming conventions just not enough to actually start writing again. Database entity But the wait is over and I’m back! Now bask in my beautiful ginger words! For this series, I am going to look at some common problems we see in the WRC and discuss some common solutions. Database developer Of course, even if you find a solution here, you are always welcome to call in and expression you gratitude, or just hear my voice! Now, supposedly you’ve checked that your query SHOULD return data. Data recovery plan That is, if you do a “SELECT * FROM MyTable” and don’t get back any data, I don’t expect that your more complicated query with JOINs, a WHERE clause, and a GROUP BY will either.


Data recovery kansas city So, if you’ve determined that the data lives in your table what else could be going wrong? Laugh if you’d like, but this is by far the most common problem. N k database Usually people don’t call in with this one, but it does occasionally come up. Data recovery 2016 If you’re not getting data, the first reaction you should have is to check your namespace, and while you’re at it, make sure you’re connecting to the right instance. 510 k database fda Get the simple one out of the way first. This is the problem that trips up most people. Database programmer If you open your class definition and add an index, it is not automatically built for you. Data recovery osx Therefore, when you add an index, it is available for use by the SQL Compiler, but it doesn’t have any data in it. Database integrity So when we look, no data, boom, query done, no results! You need to call ##class().%BuildIndices($LB(““)) in order to get that new index populated with the right data. Database backup Be careful doing this on a live system, though! For advice on building an index on a live system, please contact the WRC and let us know your version! When running a query, there are a few modes you can be in: Logical, Display, and ODBC. Hollywood u database The typical way to show the difference is with %Date properties. Data recovery ipad For instance today is 64295, 01/12/2017, 2017-01-12 in Logical, Display, and ODBC modes respectively. Database vs server If you are in the wrong SELECTMODE then your date queries will sometimes return no data even if they should. Database is in transition A good way to test this is to run a query in the SQL Shell and set your selectmode – like so: This way you have absolute (and simple) control over your query’s selectmode. Data recovery ios You can also run xDBC (ODBC/JDBC) queries and know that we’re in ODBC mode. If you followed any of Brendan’s awesome posts regarding building your own storage, there is an additional problem that can catch you. Database data types You need to make sure that the collation you defined for your field is properly put into your index. Data recovery johannesburg Therefore, if your %String field has SQLUPPER collation, the index should have SQLUPPER collation. Iphone 5 data recovery software If not, you can find that you have no data. This is pretty rare, but if you are using a different NLS collation, you need to make sure the NLS collation on CACHTEMP matches the NLS collation on your database. Database operations See the official word in the docs here: Those are the big ones. Database index Try looking at some of the things mentioned here, and if you have trouble figuring it out, feel free to contact Support and we’ll be happy to look at it with you!

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