Adding a Column to a Data Set

The cstutiladddscolumn macro adds a new column and any corresponding column attributes used by the SAS Clinical Standards Toolkit. An initial value can be specified for the column if needed.

In this example, the new column parameter (_cstColumn) is specified as comment2. The other parameters set the label, type, length, format, and initial value for the column. The label is specified as

Additional
                     comment

, the type is specified as C (character), the length is specified as 200, the format is specified as $200, and the initial value is specified as

This is a test to add
                     a new variable

. The initial value is set for the comment2 column for all records.

**********************
*  Add a new column  *
**********************;

%cstutiladddscolumn(
        _cstStd=CDISC-SDTM,
        _cstStdVer=3.1.3,
        _cstDS=newstudy.source_values,
        _cstColumn=comment2,
        _cstColumnLabel=Additional comment,
        _cstColumnType=c,
        _cstColumnLength=200,
        _cstColumnFmt=$200.,
        _cstColumnInitValue=This is a test to add a new variable);

Before running the macro, the number of columns in the newstudy.source_values data set was 21. After running the macro, the number of columns is 22 and the comment2 column was modified.

Here is the full set of columns in the newstudy.source_values data set. The comment2 column is at the bottom of the list with length, format, and label as specified in the macro parameters:

modified columns in the newstudy.source_values data set

Here is the modified newstudy.source_values data set, which shows that the initial value of This is a test to add a new variable was set for the new column on all data set records:

Here is the modified work.results data set:

Here is the updated transaction log data set: