DELETE command: Field: Difference between revisions
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==Syntax== | ==Syntax== | ||
<p class="syntax">DELETE FIELD < | <p class="syntax">DELETE FIELD <var class="term">fieldname</var> | ||
</p> | </p> | ||
<b>Where:</b> | <b>Where:</b> | ||
fieldname is the name of a field in the currently open <var class="product">Model 204</var> file. | <var class="term">fieldname</var> is the name of a field in the currently open <var class="product">Model 204</var> file. | ||
==Example== | ==Example== | ||
<p class="code">DELETE FIELD EMPID | <p class="code">DELETE FIELD EMPID |
Revision as of 20:47, 28 June 2013
Summary
- Privileges
- File manager
- Function
- Deletes a field from a Model 204 file
Syntax
DELETE FIELD fieldname
Where: fieldname is the name of a field in the currently open Model 204 file.
Example
DELETE FIELD EMPID
Usage notes
When a field is deleted, Model 204 removes the definition of the field and all occurrences of data for that field.
Depending on the size of the file and the field type, a DELETE FIELD command might take a long time to complete.
You cannot delete record security fields, sort, or hash key fields. If the specified field is in a Model 204 file with record security, the file manager must have record security override privileges.
When it processes DELETE FIELD, Model 204 ends any update unit in progress and begins a non-backoutable update unit. For more information about Model 204 update units, see the Model 204 File Manager's Guide.
Handling the date/time stamp field in a file
The DELETE FIELD command is prohibited for the DTSFN field in a file when the FOPT=X'10' is set. Attempting to do so results in the following message
M204.2727: CAN'T DELETE DTS FIELD WHEN FOPT=X'10' IS ON
Large Object data support
The DELETE FIELD fieldname command supports the Large Object data type, so you can delete a Large Object field. However, the space in Table B and Table E is not automatically available for reuse.