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_getfield |
Syntax | |
Example |
Syntax |
CALL SEND(cnctionInst, '_getfield', status, rc <, parm1...parmn>); |
Where... | Is type... | And represents... |
---|---|---|
status | N | status of parameter receipt |
rc | N | return code |
parm1...parmn | N or C | parameters in which to receive the message; consists of 0 or more numeric or character variables |
When a message is surfaced by a query, it must be received into SCL parameters. The _getfield method behaves like the _recv method in that it receives the message into SCL parameters. The two methods differ in that _recv requires that you receive the entire message at one time, while _getfield allows each parameter to be received separately. The _getfield method supports the receipt of numeric and character parameters, but it does not support the receipt of SCL lists. Use _getlist to receive SCL lists one at a time.
The status parameter has a value of 1 if this is the last parameter, indicating there are no additional parameters to retrieve. Otherwise, it has a value of 0.
If an error or warning condition is encountered during the receive, a non-zero return code is returned in the rc parameter. Use SYSMSG() to determine the exact error message.
Example |
This example receives one parameter, then two parameters, then the last one.
name1 = ''; name2 = ''; name3 = ''; name4 = ''; call send(cnctionInst, '_getfield', status, rc, name1); if (status ne 1) and (rc eq 0) then call send(cnctionInst, '_getfield', status, rc, name2, name3); if (status ne 1) and (rc eq 0) then call send(cnctionInst, '_getfield', status, rc, name4); /****************************************/ /* If this is the last parameter to be */ /* received, status should have a value */ /* of 1. */ /****************************************/ if (status eq 1) and (rc eq 0) then /* All parameters have been received */ /* and can be used in processing. */
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Copyright 1999 by SAS Institute Inc., Cary, NC, USA. All rights reserved.