Adabas Files, File Type A

Adabas files are defined in several subsequent input screens. Screens on lower levels are called by specifying Y in one of the fields Attributes or Additional attributes in the bottom line of the higher-level screens.

The following diagram gives an overview of the input screens and the sections where these screens are described.

The following topics are covered below:

Add/Copy/Modify a File Screen

    09:28:21             *****  P R E D I C T  *****              2007-05-31
                                    - Add a file -
    File ID ......... HNO-A-FILE
    Type ............ Adabas,Simple file
    File number ..... 123
    Contained in DA .
    Keys ..                                                                 Zoom: N
   
    Literal name ............
    Average count ...........
    Stability ..............*   Not specified
    Sequence field .........*
    Vista Access DBnr ......*
    Vista Access Fnr ........
    Adabas SQL usage ........ N (Y/N)
    Abstract     Zoom: N
   
   
   
   
   
   
   
      Additional attributes ..* N  * Database link attr. .. N    Associations ..* N

Note:
Parameters common to all object types are described under Global Attributes. For parameters common to all file types, see Common File Attributes.

Parameters
Sequence field The descriptor to be used by Natural for logical sequential reading. Determines the sequence in which records are delivered by the READ LOGICAL statement. The GENERATE DDM function will use this field as the default READ LOGICAL field in the Natural data definition module.
Vista Access DBnr, Vista Access Fnr The L-DBnr and L-Fnr are used as database and file number for function Generate DDM if the parameter Use Vista access-nr is set to Y or T in the Generate DDM menu.
Valid values are 0 to 65535 for DBnr and Fnr. No check for uniqueness is performed.

Note:
This parameter should not be confused with the Vista parameter Vista number, which is used to identify a file uniquely within a network. See Including the Definition in the Vista Table in the section Adabas Vista in the Predict and Other Systems documentation

Adabas SQL usage
Y File is accessible via Adabas SQL Server.

Note:
When you add a file, this parameter can be specified in the Add a file screen. To change the value of this attribute for a file that already exists, use the Rename/renumber file function (see Rename File ).

Additional Options
Additional attributes
Y Two types of additional attributes can be specified:

  • Adabas attributes

  • Vista elements.
The screens for entering Adabas attributes are described in the sections below.

Modifying Adabas Attributes

There are different ways of calling the initial Modify Adabas attributes screen:

  • specify Y in the field Additional attributes and mark Adabas attributes in the selection window

  • select function Modify Adabas Attributes (code J) in the File Maintenance menu

  • enter command .A in the file editor of a database object

  • enter command MODIFY ADA-ATTR.

Note:
If you do not call this screen, the default values set in the Default Adabas Attributes screen are taken. See the Predict Administration documentation. The Default Adabas Attributes screen is displayed with code A in the General Defaults menu. 

16:35:58             *****  P R E D I C T  *****                     2007-05-31
                        - Modify Adabas attributes -                           
File ID ......... HNO-ADA-LOB                         Added 2006-04-27 at 15:27
Type ............ Adabas, Partitioned                    by HNO                
Contained in DA .                                                              
                                                                               
Required attributes                       Physical distribution type           
  Phys. file number ..* 54                  Simple file                        
  Min ISN ............. 1                                                      
  Max ISN ............. 667                                                    
                                                                               
      Device       Cylinder   Blocks      Padding factor  Max 2. alloc         
      *-----       ---------- ----------  --------------  ------------         
ASSO    3380   UI             1                 10                             
               NI             1                                                
DATA    3380   DS             1                 10                             
                                                                               
Loading attributes                        Loading attributes                   
  Max recl. ...........                     One AC extent .......... N (Y,N)   
  ISN reusage ......... N (Y,N)             DS reusage ............. Y (Y,N)   
  User ISN ............ N (Y,N)             Mixed DS device ........ Y (Y,N)   
  LOB file number ....*                                                        
* Additional attributes ..* S

Note:
Up to six additional input screens can be called from this screen.

Parameters
Required attributes
Phys. file number If a database is specified, the file number is taken as a physical file number automatically if this is possible. If not, a free physical number can be selected from a selection window.
LOB file number An associated LOB file can be specified for a base file containing fields of type LO. Whenever the number of an associated LOB file is entered in the Adabas attributes of a base file, an own set of Adabas attributes is stored for SAG-ADA-LOB having the specified file number.
Physical distribution type The distribution type of the physical file which describes how the logical file is stored. Read only field.
Min ISN ADALOD LOAD parameter MINISN.
Max ISN ADALOD LOAD parameter MAXISN.

Device and Size Specification for Adabas Files 

   
        ....................................
        ....................................
   
           Device       Cylinder Blocks    Padding factor  Max 2. alloc
           *-----       -------- --------  --------------  ------------
    ASSO    3380   UI                           10
                   NI
    DATA    3380   DS                           10
        ....................................
        ....................................

The device type and the size of the Upper Index (UI), Normal Index (NI) and Data Storage (DS) can be specified. If the size is specified in blocks, the equivalent size in cylinders provided by Predict is preceded by greater than (>) if the number of cylinders does not match exactly. If the size is specified in cylinders, Predict provides the equivalent size in blocks. The maximum secondary allocation in blocks can also be specified in each case.

Four characters specify the type of device used to store this part of the file. This device type must already be defined in the Predict database object containing this file. When this device type is changed in the database, the same change should be made in every file object contained in the database.

DATA padding factor ADALOD LOAD parameter DATAPFAC.
ASSO padding factor ADALOD LOAD parameter ASSOPFAC.
Device The device type of the Upper Index (UI), Normal Index (NI) and Data Storage (DS). The device type for Data Storage is ADALOD LOAD parameter DSDEV.
Size (Cylinders/Blocks) ADALOD LOAD parameters UISIZE (Upper Index), NISIZE (Normal Index) and DSSIZE (Data Storage).

Note:
See also Extent Allocation.

Loading attributes
Max recl. ADALOD LOAD parameter MAXRECL.
ISN reusage ADALOD LOAD parameter ISNREUSE.
User ISN ADALOD LOAD parameter USERISN.
One AC extent ADALOD LOAD parameter NOACEXTENSION.
DS reusage ADALOD LOAD parameter DSREUSE.
Maximum secondary allocation ADALOD LOAD parameters MAXUI (Upper Index), MAXNI (Normal Index) and MAXDS (Data Storage).
Additional Options
Additional Attributes
Y Displays a window for specifying the following Adabas attributes:

  • Phys. distribution attr.

  • Miscellaneous attributes

  • ADAM key definition

  • Extent allocation

  • Distribution criteria

  • Encodings

Note:
Phys. distribution attr. and Extent allocation only appear in this window if applicable.

Phys. distribution attr. 

    13:19:12             *****  P R E D I C T  *****             2007-05-31
                            - Modify Adabas attributes -
    File ID ......... HNO-NEW                            Added 2007-05-31 at 13:19
    Type ............ Adabas, Partitioned                   by HNO
    Contained in DA . HEB-55-HEB-NW-V (PDBnr: 55)
   
    Distribution attribute
      Phys. distribution type ..* P  Partitioned    

    Loading attributes         
      Min ISN ............. 19
      Max ISN ............. 667
      One AC extent ....... N (Y,N)  
   





   
    * Additional attributes ..* N
Parameters
Phys. distribution type
The types for the physical file are limited by the logical distribution type, as shown below:
Physical distribution Type Logical distribution Type
E expanded E expanded
P partitioned P partitioned
blank simple File any

Miscellaneous Attributes and Adabas Security Definition 

    13:33:18             *****  P R E D I C T  *****             2011-05-31
                            - Modify Adabas attributes -
    File ID ......... XYZ-NEW                            Added 2011-05-31 at 13:19
    Contained in DA .                                       by XYZ
    PDBnr ...........       PFnr ... 123
   
    Adabas Security definition                                              
      Access level ...........    (0-15)                                    
      Update level ...........    (0-15)                                    
                                                                        
    Loading attributes                     Record spanning                  
      Ciphered ............... N  (Y,N)      Spanned .............. Y  (Y,N)
      LOWNERID ............... 0  (0-8)      Max secondary ISN .... 1122    
      Refresh from program ... N  (Y,N)      Secondary start RABN . 3344                                   
      Automatic allocation ... Y  (Y,N)                                     
      PLOG ................... Y  (Y,N)                                     
      ISN size ..............* 0                                            
      Erase .................. N  (Y,N)                                     
      Index compression ...... N  (Y,N) 
      No BT file ............. N  (Y,N)  
      Max occ system fields .. 10 (1-20)
Parameters
Access level The Adabas access security level of the file.
Update level The Adabas update security level of the file.
Ciphered
Y The file is a ciphered file.
LOWNERID Length of internal Owner ID of a multi-client file.
Refresh from program Adabas parameter PGMREFRESH. See the Adabas DBA documentation.
Automatic allocation
Y Adabas will automatically allocate and deallocate extents. See the Adabas Reference documentation.
PLOG
Y Database runs with protection log. UNIX only.
ISN Size

Length of ISN.

Valid values: 0, 2, 3 and 4.

For Adabas/UNIX: 0, 2 and 4 are valid.

For mainframes: 0, 3 and 4 are valid.
Erase
Y For Adabas/UNIX. All index and data storage blocks are overwritten with zeroes when they are returned to the free space table.
Index compression
Y Adabas reduces space requirements for the index and for data storage by removing redundant information on an individual descriptor basis.
No BT file
Y Exclude file from BACKOUT TRANSACTION processing.
Record spanning
Spanned When record spanning is enabled, the size of compressed records in a file may exceed the maximum data storage block size. Default is Y.
Max secondary ISN Defines the initial size of secondary ISNs.
Secondary start RABN If spanned records are used, a secondary address converter is used to map the secondary ISNs to the RABNs of the Data Storage blocks where the secondary records are stored.
Max occ system fields This parameter specifies the maximum number of values generated for a system-generated multiple-value field.

Extent Allocation - Size Specifications For More Than One Extent

More than one extent can be specified using the Extent allocation option in the Modify Adabas attributes selection window.

The size and first RABN (Start Rb) of the Address Converter (AC), Upper Index (UI), Normal Index (NI) and Data Storage (DS) can be specified for up to 99 extents. The total space allocated is displayed in the upper right corner of the screen. 

    13:47:50               *****  P R E D I C T  *****               2007-05-31
                              - Modify Adabas attributes -
    File ID ......... HEB-FI-PART                         Modified 2007-05-31 at 09:24
    Contained in DA . HEB-DA-TRANS                              by FST
    PDBnr ........... 21    PFnr ... 1
                                                        +- Total -------------------+ 
    Extent *Device Start RABN Cylinder   Blocks         !    Cylinder     Blocks    ! 
     1  AC 3390                          1              ! AC              1         ! 
        UI 3390                                         ! UI                        !
        NI 3390                                         ! NI                        !
        DS 3390                                         ! DS                        !
                                                        +---------------------------+

     2  AC                                    
        UI
        NI
        DS
                                              
     3  AC                                    
        UI                                    
        NI                                    
        DS                                    
                                              
    * Additional attributes ..* S                                    Scroll to .... 1

Specifying Restrictions on Input Data - Distribution Criteria

Distribution criteria determine which data can be written to a file.

    13:13:39             *****  P R E D I C T  *****             2007-05-31
                            - Modify Adabas attributes -
    File ID ......... PD-AD1                          Modified 2007-05-31 at 10:08
    Contained in DA . DEMO-DB                               by PD
    PDBnr ........... 180   PFnr ... 13
   
    Ty Partitioning field               F  Cs Length   Occ   D U DB N NAT-l
    -- *------------------------------- -- -- -------- ----- - - -- - -----

   
   
       1 Access ....*      Critical ..* (Y,N)   Shared Partition ..   (Y,N)
         Part. name . 
         High value .                                                      Zoom: N
   
       2 Access ....*      Critical ..* (Y,N)   Shared Partition ..   (Y,N)
         Part. name . 
         High value .                                                      Zoom: N
   
       3 Access ....*      Critical ..* (Y,N)   Shared Partition ..   (Y,N)
         Part. name . 
         High value .                                                      Zoom: N

                     
    * Additional attributes ..* S                                 Scroll to ....
Parameters
Partitioning field ID of the field used to distribute data into separate partitions. The field must exist in the file.
Access
Specifies the access level of a partition.
F Full. Read/write access is permitted.
R Read. Read-only access is permitted.
N No access.
Critical
Specifies whether a partition is considered critical or not.
Y Critical.
N Not critical.
Shared Partition
Specifies whether to allow partition sharing for minimal data movement or not.
Y Allowed.
N Not allowed.
Value Value to be checked. If the value is longer than 50 characters, set Zoom to Y.
Scroll to If more validation criteria are specified than can be displayed in one screen, the criteria to be displayed on top of the list can be specified in the field Scroll to.

Modifying ADAM Descriptor Definition 

    13:40:40             *****  P R E D I C T  *****             2007-05-31
                            - Modify Adabas attributes -
    File ID ......... HNO-NEW                            Added 2007-05-31 at 13:34
    Contained in DA .                                       by HNO
    PDBnr ...........       PFnr ... 123
   
   
   
    ADAM descriptor definition
      Field ID ........*
      Parm .............
      Overflow .........
Parameters
ADAM descriptor definition
Field ID Fields to be used as ADAM descriptor.
ADALOD LOAD parameter ADAMDE.
Parm ADALOD LOAD parameter ADAMPARM.
Overflow ADALOD LOAD parameter ADAMOFLOW.

Modifying Vista elements 

 13:51:47            *****  P R E D I C T  *****              2007-05-31
                           - Add Vista element -
 File ID ......... JPE340                          Modified 2007-05-31 at 13:50
 Type ............ Adabas, Partitioned                 by HEB
   
 Network ........* HOME
 Simple .......... Y (Y,N)           Partition ID assignment ..* V Vista
 Vista                               Max number of partitions .. 255
  Environment ID .                   Enable Read-by-ISN ........ Y (Y,N)
  DBnr ........... 1                 Part. file concurrency .... 8
  Fnr ............ 3                 Store control option .....* 1 Reject
  Name ...........


     Database                          PDBnr  PFnr   Criterion
     *-------------------------------  -----  -----  --------------------
   1






 
                                                          Scroll to:

Parameters

See the section Including the Definition in the Vista Table in the section Adabas Vista in the Predict and Other Systems documentation for a description of all parameters.

Encodings

Universal encoding support of an Adabas file can be defined in the screen shown below. 

13:40:40             *****  P R E D I C T  *****              2007-05-31
                         - Modify Adabas attributes -
 File ID ......... HNO-NEW123                       Modified 2007-05-31 at 13:34
 Contained in DA . HNO-TEST                               by HNO
 PDBnr ........... 12     PFnr ... 123
   
   
   
 Universal encoding support
   FACODE ..*      none
   FWCODE ..*      none
   FUWCODE .*      none









  
 * Additional attributes ..* S

Note:
See the Adabas Administration documentation for further information on this topic.