how can my sql script determine whether it is running in sqldeveloper or sqlplus?

问题

I'm trying to work around the SQLDeveloper linesize bug by writing my script to detect whether it's SQL*Plus or SQLDeveloper. Something like:

COLUMN SET_THE_LINE new_value TARGETLINESIZE noprint
SELECT DECODE ('&&_SQLPLUS_RELEASE.','',5,500) as SET_THE_LINE from dual;
SET LINESIZE &&TARGETLINESIZE

I know that SQL*Plus always sets the value of _SQLPLUS_RELEASE and, understandably, SQLDeveloper does not.

Unfortunately SQLDeveloper always prompts for the value of _SQLPLUS_RELEASE.

Any suggestions?

回答1:

I'm not familiar with an SQL Developer linesize bug, so not sure what the end result is supposed to be. But you can use sys_context for this:

select sys_context('USERENV', 'MODULE') from dual;

Which gives:

SYS_CONTEXT('USERENV','MODULE')
--------------------------------------------------------------------------------
SQL*Plus

... or:

SYS_CONTEXT('USERENV','MODULE')                                           
-------------------------------
SQL Developer

So you can adapt what you have as:

column set_the_line new_value targetlinesize noprint
set termout off
select case sys_context('USERENV', 'MODULE')
    when 'SQL Developer' then 5 else 500 end as set_the_line from dual;
set termout on
set linesize &&targetlinesize

And then test with

show linesize

which gives linesize 500 in SQL*Plus and linesize 5 in SQL Developer.

If you might not be connected yet in SQL*Plus, just define the value first; you don't even need to do anything special to hide the error from the select beyond the set termout off, though you could include a whenever sqlerror just in case your login.sql is setting it to exit - but then you maybe have to know to reset it afterwards.

define targetlinesize=500
whenever sqlerror continue
set termout off
column set_the_line new_value targetlinesize noprint
select case sys_context('USERENV', 'MODULE')
    when 'SQL Developer' then 5 else 500 end as set_the_line from dual;
set termout on
set linesize &&targetlinesize
show linesize

The column value will override it if the select succeeds, and not touch it if it fails. If I put that in a file called client.sql and run it as:

sqlplus -s /nolog @client

I only get this output:

linesize 500

And the same thing runs in SQL Developer, giving linesize 5 again.

回答2:

You can query the executable name from v$session

select program from v$session where sid = sys_context('userenv','sid')

sql*plus for example will be sqlplus.exe.

@alex's way is also good but module is easily manipulated and often used by application as an online monitoring tool. this is why i dont think should rely on it (i personally have a habit of always setting the module/action when performing long processes in pl/sql and it overrides the existing value).

when using the program keep in mind that it can also be easily manipulated by changing the executable name - it's called spoofing.

来源：https://stackoverflow.com/questions/16596918/how-can-my-sql-script-determine-whether-it-is-running-in-sqldeveloper-or-sqlplus

标签

Oracle

oracle-sqldeveloper