SET statement.

The SET statement provides a means for:

Format 1.

          SET { index-name-1 } ... TO { arithmetic-expression-1 }
              { identifier-1 }        { index-name-2            }
                                      { identifier-2            }

Format 2.

          SET { index-name-3 } ... { UP   } BY arithmetic-expression-2
                                   { DOWN }

Format 3.

          SET { mnemonic-name-1 } ... TO { ON  }
                                         { OFF }

Format 4.

          SET { condition-name-1 } ... TO { TRUE  }
                                          { FALSE }