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Conditional execution (IF)

The command allows running a command or a sequence of commands under certain conditions. The command is executed when the expression is true . One may also run a sequence of commands enclosed in a BEGIN / DO - END block. The complete IF statement including command or BEGIN / DO has to be defined on a single line.

Parameters:

  • expression - The OSI expression defines the condition to be checked before running the command(s). The expression must be a valid OSI expression. When the expression contains special characters it must be put into quotes or apostrophes.
  • command - The command to be executed when the condition ist true . For processing a block of statements one may use CALL for running a pre-defined procedure or a BEGIN / DO - END block.
  • -Dn - re-direction to other data source.
  • -Cn - re-direction to other collection in the hierarchy or in the data source referenced by -Dn.


Syntax:

  if expression command -Dn - Cn

Examples:

  if "age > 20" p name  // Show value for 'name' when age > 20

  if "age > 20" do      // Show value for 'name' and 'age' when age > 20

    p name

    p age

  end