You have been prevented from accessing storage beyond the end of the block. The s370v option indicates that the records in the source file have variable lengths. The move statement is especially useful for moving data without conversion and for moving variable length data strings. Note that the 2 is not 2 bytes and just specifies the 2 digits after decimal point. For variablelength records, the field contains only the length of the data the 4 lengthrelated bytes are excluded. Cobol file section learn cobol in simple and easy steps with examples.
Easytrieve guide for mainframe programmers 5 of 20 srinimf. I would suggest something like, how can i use data sets with variable length records with easytrieve you are making at least two requests here. The 2 is for the 2 digits after decimal point, and the 4 still means the total 4 bytes occupied. Sequential processing retrieves records sequenced by the relative sequence number. Cobol performance issue with read into of variable length record file.
On the fd and select statements in a cobol program use the depending on fieldnameformy. Easytrieve b163 maximum record length exceeded for extended reporting printer a print record for the indicated statement exceeds the maximum record size defined for the assigned extended reporting printer. You must have access to the btrieve product from pervasive software, inc. The user is often expected to specify these parameters when creating a new data set.
Easytrieve sort and file comparision f1 for mainframe. Fixedlength data sets have a recfm of f, fb, fbs, and so on. The test programs run did only a read and no processing vs a read. Relative files use a fourbyte binary key that contains an integer value that specifies the relative record number. Assuming youre reading this file in a cobol program running on the mainframe, this is really no problem. The record descriptor word is a 4byte field d escribing th e record. Notice that customer numbers 002200, 002300 and 999999 contain examples of fields with leading spaces and fields that contain a comma in the data string. When new records are inserted, the logical order of the records depends on the collating sequence of the key field. For vsam files, easytrieve obtains record and file characteristics from the vsam catalog, and it does not allow record size in the file definition. Jcl, define and use variables, variable substitution and. This section introduces variable length records, demonstrates how variable. To create variable length records using caeasytrieve, you must designate the output file as being variable in the file section move the length of the record to the system field filename. One place in easytrieve plus where i use move is with files, because move always uses the record length when using files. In the program fragment below, the revised record descriptions are shown.
I dont have access to easytrieve plus, so apologies in advance if it doesnt compile around the edges. Reading variable length records, information can be. Ksds can be used in cobol programs like any other file. Additionally, you can also start the input at a specific record or use skipsequential processing to bypass groups of records. Though i had coded leng th 100 when defi ne file in easytrie ve,the ez t writ e a rec ord with the maximum bytes to th e vb file. Make sure that the record size of variable length files includes 4 extra bytes for standard length as per ibm standards. Easytrieve guide for mainframe programmers 2 of 20 srinimf. The process used is essentially the same as that described for sequential file input. You may have to define the variable input datasets in the file statement. Programming input and output the following is an example of a file that contains records with predefined, fixedlength fields. Processes data in alphabetic, numeric, packed, packedunsigned, or binary format. Wscount endproc please note, above code isnt tested, its just a draft showing the idea on file matching using easytrieve to achieve the task. Records in ksds dataset can be of fixed length or variable length. In the variable length declaration the file record length of the file can increase.
Recordlength a 4byte binary field available for all file types. Recordlength before putting or writeing the record to the file. However, in the generic pattern sense, where you want to delete some records from a file based on business logic implemented in cobol, the best approach is to read the original input file, filter it through your logic, and write a new output file. Cobol is it possible to delete records in sequential file. Easytrieve sample program display totals and summary.
Same easytrieve code in different installations gives. In the case described, the variable file contained records varying from. It contains the length of the last accessed or written file record. V variable this format has one logica l recor d as one physical block. When also supported by the operating environment, supports the following relative access methods. You have come to the end of a block, with a record that is less than 1046 bytes. Their size is the minimum that is required to contain the components required to produce the print line. Stoprun, exit program, go back, initialize, inspect, examine, string, unstring, move. If an existing file is opened, the maximum record length must match the length supplied when the file is created, and the position and lengths of the primary key and all alternate keys must also match. Here when we provide the option of printer for output file, the default length of output file is taken as 3 and recfm as fa printer file. The below example shows how to declare file variables. Cobol performance issue with read into of variable length. Files with variable length records, processing with standard.
When you are reading an input file where you do not know the record lengths as with variablelength files, use. It is essential to have the correct file record length in the converted cobol program. For print data sets supporting variable or undefined record lengths, the print record is output using the length of the original print record. To include a copybook from a pds in a caeasytrieve program when. For ebcdic files with variablelength records, you must also specify the s370v and rcmd options. Need help to extract record comparing the 2 files by alanmdc thu may 17, 2012 10.
You will probably get a more useful response with a more usable title. Hi,all, i need to write a outfile with variable leng th 100bytesbyt es in easytrie ve. This file will be used to create a comma delimited file filename. Allows fixed, variable, undefined, or spanned record formats. For the exact values, refer to the ibm cobol compiler manual for your operating system. The access can be done either automatically job input or controlled get. For the rcmd option, specify rcmdsite rdw to indicate that the ftp process should keep. Easytrieve file handling and file declaration use this code. The easytrieve presention by srinimf linkedin slideshare. For variablelength records, the length must be assigned before the write or put operations.
If the minimum and maximum lengths are equal, then the file is of fixedlength format. So for a variablelength record you need to add four to all the startpositions for all your fields. Ca easytrieve builds variable length print records. Now, when you set your lrecl to 22000, you were only telling sas that 22000 is the maximum expected length after all the record format is v for variable length. Ca easytrieve report generator supports the btrieve file system as an installable file system z. The first 2 by tes contain the lengt h of the lo gical record includi ng the 4byte rdw. After processing sas reported that all the records turned out to be 14,977 bytes long, even though sas was prepared for up to 22000 bytes and the operating system would have. This section introduces cobol print files, demonstrates how a print file may be set up.
Easytrieve file handling and file declaration use this. Compiling cobol with truncopt option will increase the maximum value of 2byte and 4byte fields to their maximum capacity. For variablelength records, this field contains only the length of the records actual data. Easytrieve guide for mainframe programmers 4 of 20 srinimf. Also, provide the record length and blocksize in the format. Ibm migration utility for zos version 4 release 1 installation, users guide and reference ibm sc27455301.
Ezt data conversion from alphanumeric to packed decimal. Cobol does not dynamically allocate vsam file characteristics. Following is a list of some important caeasytrieve plus capabilities. The move is always done only for the value of recordlength which is why data from longer previous records is undisturbed. Is numeric function in easytrieve im sure this is defined somewhere in the easytrieve documentation. The set statement is used to define a variable by name and set an initial value for the variable. We will specify the file name in jcl and we can use the ksds file for processing inside program.
The type and length of a data set are defined by its record format recfm and logical record length lrecl. Also, provide the record length and blocksize in the format, fixed block. For example uvsort replaces the unixlinux system sort which cannot sort fixed length records without linefeeds or sort on. Easytrieve, mainframe data tables actuarial outpost. Reading a variable length record mainframe file stack overflow.
Easytrieve is a report generator product of ca technologies. Apply to developer, senior developer, programmer analyst and more. Hi, i need to know if there is a way to use eztrieve to search for the. A variable leng th logical rec ord cons ists of a r ecord descriptor word rdw followed by th e data. To create variable length records using caeasytrieve, you must designate the. But linesize provided in the report section, defines the length the report to be displayed in the output file.
Nonvsam variable length records nonvsam variable length record files can be one of. The recordlength parameter determines the maximum record length for the file, and also whether the records are fixed or variablelength. Easytrieve b163 maximum record length exceeded for. Easytrieve classic and easytrieve plus are two available versions of this programming languages primarily designed to generate reports and are used by large corporations operating in mainframe zos, zvm, zvse, unix, linux, and microsoft windows environments. Generally, the best answer to dropping a few records at the front of a file is to use the installation sort utility. On a variablelength record, the data starts at position five, because the first four bytes are occupied by the record descriptor word rdw in this context word just means four bytes.
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