New (Dataset constructor): Difference between revisions
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m (Created page with "==New (Dataset constructor)== This constructor creates a new instance of a <var>Dataset</var> object. ==New syntax== <p class="pre"> %dataset = new(dsname) </p> ===Syntax terms==...") |
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This constructor creates a new instance of a <var>Dataset</var> object. | This constructor creates a new instance of a <var>Dataset</var> object. | ||
==New syntax== | ==New syntax== | ||
Revision as of 16:55, 20 May 2011
This constructor creates a new instance of a Dataset object.
New syntax
%dataset = new(dsname)
Syntax terms
| %dataset | A variable to receive a reference to the newly created
Dataset object. |
|---|---|
| dsname | The name of the dataset or stream to be associated with the Dataset
object. This is a required argument. |
Usage Notes
- The dataset name must be 8 characters or shorter and cannot contain leading or intermediate blanks. It also cannot contain other characters not allowed in dataset or stream names. Failure to conform to these rules results in request cancellation.
- The New constructor does not validate that the Dataset is allocated or the stream defined. This is because a dataset can be allocated or freed before it is actually opened, or a stream could be defined or deleted before it is opened. As such, checking dataset or stream existence at New time wouldn't be a reliable check, so it is not done.