CASE operand.
[WHEN operand1 [OR operand2 [OR operand3 [...]]].
[statement_block1]]
...
[WHEN OTHERS.
[statement_blockn]]
ENDCASE.
Defines a control structure with multiple statement blocks statement_block1, ..., statement_blockn. The first statement block, for which the content of the operand operand is identical to one of the operands operand1, operand2, ... in the WHEN statement, is executed first. If no matches are found, the statement block is executed after the statement WHEN OTHERS.