SQL Scalar UDF that writes varbyte or varchar arg to MQ.

README

 Purpose: SQL Scalar UDF that writes varbyte or varchar arg to MQ
 
 Author:
 Robert Hahn
 Robert.Hahn@teradata.com
 
 Support:
  Author will answer questions and consider enhancment requests on a time available basis.
  email: Robert.Hahn@ncr.com  with any questions, suggestions, or feedback.
 
 Contents:
 
 Parms:
  qmgr, qnm, channel, varchar message.
 
 Comments--To Do:
  Add varbyte overload.
  Accept identity args and open w/MQOO_ALTERNATE_USER_AUTHORITY
  for varchar, set md.Encoding and md.CodedCharSetId so that mq will convert e.g. to ebcdic
  Use snprintf, strncpy (had some problem with snprintf).
 
 Documentation:
  MQConnect/MQOpen then MQPUT the varchar argument.
  This can be used for single puts or parallel controlled by a where clause.
  This should be run in protected mode since it causes mallocs.
  Note: Update defaults for qmgr, qnm, envmq etc.
 
 Requirements:
  For MPRAS, this requires that the IBM MQ Client for MPRAS is installed on all nodes:
  Obtain from here: http: www-1.ibm.com/support/docview.wss?uid=swg24000067
  Similar for windows--available as part of any Websphere MQ Server distribution
 
 Build:
  Scalar UDF:
   replace function emruwmq(
    qmgr varchar(256), qnm varchar(256), channel varchar(256), vcmsg varchar(32000)) returns integer
    language C NO SQL parameter style sql EXTERNAL NAME
    'F:emruwmq:SI:cmqc:/usr/include/cmqc.h:SL:mqic:SL:mqmcs:SS:emruwmq:/home/rmh/projects/emruwmq/emruwmq.c';
 
 	select emruwmq('queue.manager.1','QUEUE1','CHANNEL1/TCP/153.64.119.177','themessage')
    [from allamp where ampid <= 8 ]  /* parallel--assumes allamp table with 1 row/amp */
 
  Invoking from an insert statement trigger on table cxpmult w/varchar col2:
  replace TRIGGER writeMq
   after Insert on cxpmult
   REFERENCING  NEW table AS n
   FOR EACH statement
   (INSERT INTO dummy
    sel emruwmq('queue.manager.1','QUEUE1','CHANNEL1/TCP/153.64.119.177',n.col2) as c1
    from n
    where c1 < 0;);