PROC DATASETS宏变量错误

Question

我能够将宏变量解析为我期待的名称。但是proc数据集中的delete语句未被识别。如何使它工作？

PROC DATASETS LIB=WORK NODETAILS NOLIST;
    DELETE  &INPUT._mi  &INPUT._lc ;
RUN;

MPRINT(GET_true_value):   PROC DATASETS LIB=WORK NODETAILS NOLIST;
NOTE: Line generated by the macro variable "INPUT".
108          work.true_value_mi
             __________________
             22
             201
MPRINT(GET_true_value):   DELETE work.true_value_mi work.true_value_lc ;
NOTE: Enter RUN; to continue or QUIT; to end the procedure.
MPRINT(GET_true_value):   RUN;

ERROR 22-322: Expecting a name.  

ERROR 201-322: The option is not recognized and will be ignored.

NOTE: Statements not processed because of errors noted above.
109   

Answer 1

看起来问题是所写的delete语句包含库名。这不是必需的（并抛出错误），因为在PROC DATASETS语句中指定了库。

您希望宏变量解析为：

PROC DATASETS LIB=WORK NODETAILS NOLIST;
    DELETE true_value_mi ;
RUN;