An IGNORE command does not create a go-to environment; instead it gives control back to the next sequential instruction following the command causing condition. No action is going to be taken for any exceptional condition occurring during the execution of this command. When an abnormal condition occurs, the CICS response code is a field in the program work area and can be checked later usually at the next sequential instruction. It translates the formatted data stream, thus enabling the application to reference data by symbolic labels.
This command is not threadsafe if the file to which it refers is: Defined as remote and the command is function shipped over a non-IPIC connection. Defined as a shared data table, coupling facility data table, or BDAM file. When this command is used to write a record to a user-maintained data table, the update is made to the in-memory data table unless rejected by the XDTAD user exit.
When this command is used to write a record to a coupling facility data table, the update is made to the data table in the coupling facility unless it is rejected by the XDTAD user exit. Options FILE filename specifies the name of the file to be accessed.
Otherwise, the resource definition is used to find out whether the data set is on a local or a remote system. FROM data-area specifies the record that is to be written to the data set referred to by this file. LENGTH data-value specifies the length, as a halfword binary value, of the data area from which the record is written.
If the file is on a local system, the LENGTH option must be specified for variable-length records, but is optional for fixed-length records.
It is, however, advisable to specify the length of fixed-length records because this causes CICS to check that the record being written is not longer than that defined for the data set. If you supply too much data, the record is truncated.
If you supply too little data, the record is padded with binary zeros. A task could wait when it issues a WRITE request if the key is for a record that is being modified, created, or deleted by another task, because VSAM always acquires the lock first.
Use this option only when writing to an ESDS base. The contents can be a key, a relative byte address, or relative record number for VSAM data setsor a block reference, a physical key, and a deblocking argument for BDAM data sets.
For a relative byte address or a relative record number, the format of this field must be fullword binary. When adding records to a keyed data set, the field must contain the complete key. SYSID systemname specifies the name of the system to which the request is directed. Use this option when writing to an extended addressing ESDS data set.
This condition is also raised for a coupling facility data table that uses the contention model, even if another task has read the record with the same key for update.
For a coupling facility data table that uses the locking model, and for all other kinds of files, if another task has read the record for update, it is locked, and the WRITE request waits for the lock to be released, rather than returning a DUPREC response immediately.Abstract.
Chapter 4 is devoted to the stabilizing switching design for switched dynamical systems under controlled switching. It is proven that a switched Lyapunov function exists if the system is globally asymptotically stabilizable.
CICS Channels and Containers. COMMAREA is something all of us, CICS programmers, are familiar with; it has been an integral part of CICS programing since its introduction in and continues to do so even today. jcl, sna, cics, ism, ispf, etc.
It's like the difference between Java (the language) and J2EE, except in the context of s computer technology. It's not intuitive and not something you can really work through without a lot of training and experience.
CICS transactions can access files and databases, which can be on either a local or remote system. Files are processed by the CICS file control program, which allows you to read, add, update, delete (VSAM only), and browse records in VSAM and BDAM data sets.
If you carry out a generic read (using the GENERIC option) on a CICS-maintained data table, and CICS returns a NOTFND condition because the record is not found in the table, CICS clears the INTO() and RIDFLD() areas to ensure that an incorrect record is not returned.
When the READ command with the SET option is used the CICS will set the address pointer to the address of the record in the file i/o area within CICS, so that the application program can directly refer to the record without moving the record contents into the Working storage area.