Displays the values of variables or expressions.
||Optional A postconditional expression.
|| A variable or expression to display, or a comma-separated list of variables and/or expressions to display. A comma-separated list can contain any combination of variables and expressions.
without an argument is a no-op. It performs no operation and issues no error.
, like ZWRITE
, displays non-printing characters and encoded data such as InterSystems IRIS lists, bitstrings, and %Status strings in a human-readable format. It does not execute control characters. Both commands provide an extensive display of object reference (oref) values, consisting of the oref value followed by the same general information, attribute values, and (where appropriate) swizzled references and calculated references returned by the %SYSTEM.OBJ.Dump()
displays the same data values as ZWRITE
with an argument, with the following differences:
Variable Names: ZZWRITE
displays the value of every expression or variable as %val=value
displays local, process-private, and global variables as varname=value
, and literals, expressions, and special variables as value
Undefined Variables: ZZWRITE
issues an <UNDEFINED> error for an undefined variable. ZWRITE
ignores undefined variables.
displays the value of the specified subscript node. ZWRITE
displays the subscript node and all defined subnodes in subscript tree order.
Extended Global Reference: ZZWRITE
displays the value of an extended global reference as %val=value
(like any other expression
), giving no indication that the value is defined in another namespace. ZWRITE
displays an extended global reference variable name showing the namespace that contains the global.
For further details on how various data values are displayed, refer to ZWRITE
An optional postconditional expression. InterSystems IRIS executes the command if the postconditional expression is true (evaluates to a nonzero numeric value). InterSystems IRIS does not execute the command if the postconditional expression is false (evaluates to zero). For further details, refer to Command Postconditional Expressions
in Using ObjectScript
An expression to evaluate, or a comma-separated list of expressions. An expression
can consist of, or contain local variables, process-private globals, global variables, or special variables. It cannot be a private variable. Variables can be subscripted. Expressions are evaluated in strict left-to-right order.
You can use extended global reference to specify a global variable not mapped to the current namespace. If you specify a nonexistent namespace, InterSystems IRIS issues a <NAMESPACE> error. If you specify a namespace for which you do not have privileges, InterSystems IRIS issues a <PROTECT> error, followed by the global name and database path, such as the following: <PROTECT> ^myglobal,c:\intersystems\cache\mgr\
. For further information on subscripted variables and extended global reference, refer to Global Structure
in Using Globals