RE: Embedded SQL to a DDM file.

Basically you cannot do sql on a ddm file.
It's such a simple test
CRTDDMF QTEMP/MYLIB to yourself.
CRTDDMF FILE(QTEMP/MYFILE)
RMTFILE(SYSIBM/SYSDUMMY1)
RMTLOCNAME('127.0.0.1' *IP)
DSPPFM FILE(QTEMP/MYFILE)
STRSQL
select * from qtemp.myfile
SQL7011
Message . . . . : MYFILE in QTEMP not table, view, or physical file.

It is not a comm issue, especially when going to 127.0.0.1.

However, there is an exception to the rule. Not that you can get this ddm exception to point to a remote system though.
dltf qtemp/myfile
Object MYFILE in QTEMP type *FILE deleted.
STRSQL

CREATE ALIAS QTEMP.MYFILE FOR SYSIBM.SYSDUMMY1

Alias MYFILE created in QTEMP.

SELECT * FROM QTEMP.MYFILE

SELECT statement run complete.
DSPFD QTEMP/MYFILE
Type of file . . . . . . . . . . . . . . . : Device
Device type . . . . . . . . . . . . . . . . : DDM
Auxiliary storage pool ID . . . . . . . . . : 00001
DDM File Attributes
File level identifier . . . . . . . . . . . : 1210311154658
Creation date . . . . . . . . . . . . . . . : 03/11/21
Remote file . . . . . . . . . . . . . . . . : RMTFILE 'SYSIBM/SYSDUMMY1

Remote location RMTLOCNAME
Name or address . . . . . . . . . . . . . : '*LOCAL'
Type . . . . . . . . . . . . . . . . . . : *SNA


Rob Berendt