Given the class name, how could I leverage the %Dictionary API to 

1. Get the ID Key field

2. Check the ID Key field is Integer type.

3. Given a property name, how could I check  there is a UNIQUE constraint/index on it and also the property is Integer type?

Thanks you.

Is there any COS API to create the database (with designated path) and the namespace ?

Also, the API to attach a given database to a given namespace?

Thanks.

The documentation only provides the syntax but does not provide any sample DDL for this case.

I am modifying some DB2 queries to Cache SQL but always meet some errors, please provide a sample query for this case.

Thanks.

Can anyone guide me where is the documentation for $zt?

The google seems suggest it may be "$ztime" or "$ztrap".

Thanks.

I don't quite understand the %NOMERGE mentioned in the documentation.

http://docs.intersystems.com/latest/csp/docbook/DocBook.UI.Page.cls?KEY=RSQL_from#RSQL_from_nomerge

Is there any specific example provided to illustrate the idea?

Thanks.

I get a list which is formed like below:

$lb("","2",6,6,6,"3")

I would like to distinguish "2" and "3" from 6 since both of them are String types.

Is there any way to achieve this?

Thanks.

I noticed that the subscript of the index map is actually the collated field (%SQLUPPER).

Is String the only data type going through this transformation? Any other data type would also go through this transformation?

Thanks. 

My question is actually about IDKEY since Primary Key is the common concept of SQL.

Why do we need IDKEY? In what kind of scenario, the IDKEY would be different from Primary Key?

Thanks.

Hi,

I want to monitor some variables in my program.

So I do this "zb *varname", however, i don't really want to get break went the program touch "varname" every time.

I only want to get break when certain conditions are meet. For example, $d(varname(1,2,3)) >  0, then break.

Is there any way to achieve this?

Thanks.

I use zf(-2) to spawn a external a Java application in a *nix instance.

I would like to kill this process after some conditions met.

I would like to leverage $zf("kill ... ") but this requires its the pid of this child process.

So is there a way to acquire the pid for the child process when I create it ?

If not, how is the suggested way to kill this process?

Thanks.

I could launch a external process via $zf(-2).

However, this child process need to refer some shared libraries in RUNTIME,so I have to set up the proper paths to the environment variable LD_LIBRARY_PATH, is anyone know how to do this?

Thank for your help.

aa=$zwc(411,1,1,3)/*$bit(1,3,5)*/
bb=$zwc(403,1,0,2)/*$bit(1,3)*/

Is there a handy function to test wether one bit string is covered by another one bitstring? For example, "bb" is covered by "aa".

I currently implement this by one AND operation and then do a bitcount, I just want to know any default function is already out there.

Thanks.

I would like to remove all the active locks and roll back all the on-going transactions.

Is there any COS command I could use?

By the way, any command I could see the current on-going locks and transactions?

Thanks.

I have a Cache-compatible sql script file and each query is separate by white space.

How could I ask Cache to execute all the queries in this file and dump the result to a specified file?

Thanks.

I get two methods below: I would run both methods concurrently.

However, the "testRead" would always read the uncommitted results from "testInsert".

Anyway to avoid that? Thanks.

ClassMethod testInsert()
{
  &sql(START TRANSACTION ISOLATION LEVEL READ COMMITTED, READ WRITE)
  &sql(insert into Test.Table(AttrA,AttrB,AttrC,AttrD) values(1,2,3,4))
  hang 15
  &sql(ROLLBACK)
}

ClassMethod testRead()
{
  &sql(START TRANSACTION ISOLATION LEVEL READ COMMITTED)
  &sql(select count(*) into :ans from Test.Table)
  &sql(COMMIT)
  w !,ans
}

I have a method would return %Status,

this method would run some sql queries and if the execution of these queries fail, I would like to return asap.

So how could I wrap the %SQLCODE into a %Status variable?

Thank for your help.

HI,

I have a query like below but its syntax is not accepted by Cache.

I would like to perform a left join on two tables first and then make a inner for this result with another table.

Given the constraint that we only allow one SELECT in the query, it is possible to achieve this semantics ?

Thank for your help.

Select * 
FROM ( sample . employee e 
LEFT JOIN  sample . company c 
on c . id = e . id ) g
JOIN sample . vendor v
on v . %id = g . attr 

The definitions of these two compiler keywords looks very similar to me.

Is there any difference between these two keywords ?

When I declare a parent class as Abstract, its child class could be compiled successfully.

However, when I  declare a parent class as NoExtent, some compile errors about storage references get pop up for its child classes.

Thanks.

I have a class name stored as %String,

How could I get the names of all its child classes?

Thanks you.