Table 259.
|
DataWindow operators |
Supported |
|
|
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: + |
||
|
Unsupported |
||
|
Subtraction (-). The setting of the DashesInIdentifiers property is ignored. For example, "A-B" always means subtract B from A. |
||
|
Operator precedence in DataWindow expressions |
Difference from PowerBuilder |
|
|
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 |
||
|
Supported & Unsupported expressions |
Supported |
|
|
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. |
||
|
Unsupported |
||
|
Series and values in graphs Columns, rows, and values in crosstabs |
||
|
Functions used in DataWindow expressions |
Supported |
|
|
Abs |
Acos |
|
|
Asc |
Asin |
|
|
Atan |
Avg |
|
|
Bitmap |
Ceiling |
|
|
Describe |
Char |
|
|
Case |
Cos |
|
|
Count |
CrosstabAvg |
|
|
CrosstabCount |
CrosstabMax |
|
|
CrosstabMin |
CrosstabSum |
|
|
CumulativePercent |
CumulativeSum |
|
|
CurrentRow |
Date |
|
|
DateTime |
Day |
|
|
DayName |
DayNumber |
|
|
DaysAfter |
Exp |
|
|
Fact |
Fill |
|
|
First |
GetText |
|
|
GetRow |
Hour |
|
|
If |
Int |
|
|
Integer |
IsDate |
|
|
IsNull |
IsNumber |
|
|
IsRowModified |
IsRowNew |
|
|
IsSelected |
IsTime |
|
|
Last |
Large |
|
|
LastPos |
Left |
|
|
LeftTrim |
Len |
|
|
Log |
LogTen |
|
|
Long |
LookUpDisplay |
|
|
Lower |
Match |
|
|
Max |
Median |
|
|
Mid |
Min |
|
|
Minute |
Mod |
|
|
Month |
Now |
|
|
Number |
Page |
|
|
PageCount |
Percent |
|
|
Pi |
Pos |
|
|
Rand |
Real |
|
|
RelativeDate |
RelativeTime |
|
|
Replace |
RGB |
|
|
Right |
RightTrim |
|
|
Round |
RowCount |
|
|
Second |
SecondsAfter |
|
|
Sign |
Sin |
|
|
RowHeight |
Small |
|
|
Space |
Sqrt |
|
|
Stdevp |
Stdev |
|
|
String |
Sum |
|
|
Tan |
Time |
|
|
Today |
Trim |
|
|
Truncate |
Upper |
|
|
WordCap |
Year |
|
|
In addition to the above functions, User functions can be used in DataWindow expressions. |
||
|
Unsupported |
||
|
Mode |
PageAcross |
|
|
PageCountAcross |
Paint |
|
|
GetPaintDC |
GetPaintRectHeight |
|
|
GetPaintRectWidth |
GetPaintRectX |
|
|
GetPaintRectY |
ProfileInt |
|
|
ProfileString |
Var |
|
|
VarP |
||
|
In addition to the above functions, System functions and External functions cannot be used in DataWindow expressions. |
||
Specific Requirements for Using Expressions
Rule for all DataWindow expressions
-
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.
-
Expressions cannot contain "~~t".
-
Expressions cannot be used in cursor or stored procedure arguments.
-
For nested structures, please verify that:
-
It is supported to have single quotes nested with single quotes or double quotes nested with single quotes.
-
It is unsupported to have single quotes nested with double quotes or double quotes nested with double quotes.
-
A multi-layer nested structure may cause problems.
-
-
If using user-defined global functions in DataWindow expressions,
-
Arguments and returned values can only be simple data tapes: Int/Integer, Boolean, String, Character, Long, UnsignedLong, UnsignedInteger.
-
Arguments cannot be references.
-
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.
-
Sort and Filter expressions
-
Unsupported functions: Avg, Count, Max, Min & Sum.
-
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
-
Overlapped quotes, for example, "sdf~"sdf", "dfg'sdf".
-
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.
