Table 247.
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DataWindow operators |
Supported |
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Arithmetic operators: +, -, *, /, ( ), ^ Relational operators: =, >, <, <>, >=, <=, BETWEEN...AND, IN, LIKE, and any of these operators in combination with NOT Logical operators for all data types: NOT, AND, OR Concatenation for string data types: + |
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Unsupported |
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Subtraction (-). The setting of the DashesInIdentifiers property is ignored. For example, "A-B" always means subtract B from A. |
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Operator precedence in DataWindow expressions |
Difference from PowerBuilder |
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The precedence of "AND" is higher than that of "OR" (in PowerBuilder, "AND" and "OR" have the same precedence). The operators >, <, <=, >= are of higher precedence than = and <> (in PowerBuilder, the operators >, <, <=, >=, =, <> are of the same precedence). Note: You can use parentheses to make sure the Web application has correct precedence effect as in the PowerBuilder application. Original expression: a OR b AND c Modified expression: (a OR b) AND c |
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Supported & Unsupported expressions |
Supported |
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Conditional expressions for property values (such as Visible, X, Y, Width, Height, BackgroundColor, TextColor) Expressions for computed fields Validation rules Filter and sort criteria Note: The information on the limitations for these types of expressions is provided in the Specific Requirements for Using Expressions. |
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Unsupported |
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Series and values in graphs Columns, rows, and values in crosstabs |
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Functions used in DataWindow expressions |
Supported |
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Abs |
Acos |
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Asc |
Asin |
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Atan |
Avg |
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Bitmap |
Ceiling |
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Describe |
Char |
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Case |
Cos |
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Count |
CrosstabAvg |
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CrosstabCount |
CrosstabMax |
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CrosstabMin |
CrosstabSum |
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CumulativePercent |
CumulativeSum |
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CurrentRow |
Date |
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DateTime |
Day |
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DayName |
DayNumber |
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DaysAfter |
Exp |
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Fact |
Fill |
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First |
GetText |
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GetRow |
Hour |
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If |
Int |
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Integer |
IsDate |
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IsNull |
IsNumber |
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IsRowModified |
IsRowNew |
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IsSelected |
IsTime |
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Last |
Large |
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LastPos |
Left |
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LeftTrim |
Len |
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Log |
LogTen |
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Long |
LookUpDisplay |
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Lower |
Match |
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Max |
Median |
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Mid |
Min |
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Minute |
Mod |
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Month |
Now |
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Number |
Page |
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PageCount |
Percent |
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Pi |
Pos |
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Rand |
Real |
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RelativeDate |
RelativeTime |
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Replace |
RGB |
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Right |
RightTrim |
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Round |
RowCount |
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Second |
SecondsAfter |
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Sign |
Sin |
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RowHeight |
Small |
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Space |
Sqrt |
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Stdevp |
Stdev |
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String |
Sum |
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Tan |
Time |
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Today |
Trim |
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Truncate |
Upper |
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WordCap |
Year |
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In addition to the above functions, User functions can be used in DataWindow expressions. |
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Unsupported |
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Mode |
PageAcross |
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PageCountAcross |
Paint |
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GetPaintDC |
GetPaintRectHeight |
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GetPaintRectWidth |
GetPaintRectX |
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GetPaintRectY |
ProfileInt |
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ProfileString |
Var |
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VarP |
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In addition to the above functions, System functions and External functions cannot be used in DataWindow expressions. |
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Specific Requirements for Using Expressions
Rule for all DataWindow expressions
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Expressions involving Null values may arrive at different values in JavaScript from their values in PowerScript. For more details, please refer to the Null Values section.
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Expressions cannot contain "~~t".
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Expressions cannot be used in cursor or stored procedure arguments.
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For nested structures, please verify that:
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It is supported to have single quotes nested with single quotes or double quotes nested with single quotes.
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It is unsupported to have single quotes nested with double quotes or double quotes nested with double quotes.
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A multi-layer nested structure may cause problems.
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If using user-defined global functions in DataWindow expressions,
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Arguments and returned values can only be simple data tapes: Int/Integer, Boolean, String, Character, Long, UnsignedLong, UnsignedInteger.
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Arguments cannot be references.
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If the computed field expression is a computed field or global function, the formatting for the computed field will not take effect on the Web.
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Sort and Filter expressions
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Unsupported functions: Avg, Count, Max, Min & Sum.
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Behavioral difference: In a Web application, if a Find, Filter or Sort expression contains any special characters (for example, ".", "", "/"), the execution result may differ from PowerBuilder. In a Web application, the DataWindow rows may display in a different order from PowerBuilder.
Property expressions
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Overlapped quotes, for example, "sdf~"sdf", "dfg'sdf".
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In the Web application, modifying a DataWindow property in a DataWindow expression may conflict with the settings in the application's source code.
String expressions
Operands in the string expression cannot a mix of constants and variables.
Decimal Precision in DataWindow expression
28-digit Decimal is only supported in the following DataWindow expressions: Abs, Avg, CamulativeSum, Median, Sign, and Sum.
