ENABLE Reference Manual

ENABLE ATTRIBUTES

CHECKDATA Attribute

The CHECKDATA attribute indicates whether the application does,

or does not, contain special code that verifies the data type of

data read from numeric fields in a data base file. The syntax of

the CHECKDATA attribute is:

-----------------------------------------------------------------

| |

| CHECKDATA { ON } |

| { OFF } |

| |

| ON |

| |

| indicates that the portion of the SCREEN COBOL requester |

| program that applies to the box checks the contents of |

| numeric fields. |

| |

| OFF |

| |

| indicates that the portion of the SCREEN COBOL requester |

| program that applies to the box does not check the |

| contents of numeric fields. |

| |

| The starting value of the CHECKDATA attribute is ON. |

| |

-----------------------------------------------------------------

Considerations

When CHECKDATA is ON and the application reads invalid numeric

data (a non-numeric value in a numeric field) from a data base

file, the application issues a warning message. It then replaces

the invalid data with zeros for display purposes only. The

application does not change the actual data in the data base file

unless you request an UPDATE operation.

If CHECKDATA is OFF and the application reads invalid data from

a numeric field, the terminal will abort when the application

tries to display the invalid data.

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