HP Integrity NonStop J-Series - Manual (Page 66)

DEVELOPING A DATA BASE
ENABLE Limitations on DDL
ENABLE Limitations on DDL
Because ENABLE uses record descriptions to generate SCREEN COBOL
source code, the syntax of a RECORD statement must be compatible
with SCREEN COBOL representation capabilities. Specifically,
this affects the syntax that you can use for the RECORD statement
as follows:
• If you use a TYPE clause or a user-defined TYPE (see the Data
Definition Language (DDL) Reference Manual for details), the
data type must be either CHARACTER or BINARY.
• BINARY 8, FLOAT 32, FLOAT 64, COMPLEX, LOGICAL 2 and LOGICAL 4
data items are not supported by ENABLE.
• When you define numeric fields, the PIC clause cannot define
more than 18 digits; for example, both PIC 9999999999999999999
and PIC 9(19) are illegal.
• If you use an OCCURS clause, the OCCURS clause nesting must
not exceed four levels. The number of occurrences must not
exceed 999.
• When you specify elementary fields, the size of each field
must not exceed 256 bytes.
• If you add the values specified for the size descriptions of
all the fields in the record description, the total number of
bytes must not exceed 2046.
• You can use a FILLER clause; however, the application will not
display the filler on the screen.
• You can use a REDEFINES clause; however, ENABLE ignores the
redefined structure.
• You can use a RENAMES clause; however, ENABLE ignores the
renamed structure.
• If you identify the entire record as a key field, an ENABLE
application will use the first group or elementary item in the
record as the key.
• If you use an OCCURS DEPENDING ON clause, ENABLE will use the
maximum number of occurs items. Refer to the ENABLE Reference
Manual for more information.
Refer to the Data Definition Language (DDL) Reference Manual
for more information about the RECORD statement.
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