The error severity level generated by the last command executed.
$errlevel
A number (0 to 4.) Can be reset by an application program.
The error severity level of the most recently executed command.
| Value | Meaning |
| 0 | No error. |
| 1 | Information message. |
| 2 | Warning. |
| 3 | User error. |
| 4 | System error. |
Isolates the common members of two or more result sets.
set1 INTERSECT set2
| set1 | A result set produced from the execution of a set-producing command. All sets in the command must have the same component structure. |
| set2 | A result set produced from the execution of a set-producing command. All sets in the command must have the same component structure. |
When used within a FIND command, the result set contains the members that are common to each of the specified result sets, with duplicates eliminated.
Controls command tracing.
SET [LOCAL] TRACE ON|OFF
| LOCAL | Indicates that command tracing is to be switched ON or OFF at the “local” level only. |
The SET TRACE command controls command tracing. When TRACE is switched ON, each line of a procedure is displayed as it is executed. Each line is preceded by the procedure name and document line number as shown in the following example:
pCustReport[19] report from Customers
SET TRACE has no effect on compiled application programs.
SET TRACE is not affected by the SET RESET and SET RESTORE commands.
To display the instructions in the procedure MyProg as they are executed, use
set trace on
MyProg
See Also
Terminate access to the remote application.
procedure DDEDisconnect (out tErrCode, inout tServ)
| tErrCode | longint, an error code |
| tServ | longint, connection handle |
DDEDisconnect terminates the access to the remote application.
The filename is ddedisc.pgm.
For example, given that DDE_Err and hServ are of type longint and that hServ has been set by a previous call to DDEConnect, enter the following to terminate a DDE conversation:
DDEDisconnect (DDE_Err, hServ)
This example ends a conversation previously established using the CONNECT service.
Returns the path of the disk file associated with a specified object.
$filepath(objname)| objname | The name of an EntitySet, relationship, application directory, or application document. |
The $filepath function returns a character string containing the path to the disk file that contains the specified object. AREAS.ZIM or DIRS.ZIM entries that apply to the file are expanded, as are the special path indicator characters. The value of $filepath is dynamically set, unless the program is compiled. Once a program is compiled, this value cannot be changed.
Steps through a procedure one command at a time, halting after each command.
SET SINGLESTEP ON|OFF
When SINGLESTEP is switched ON, execution is halted (by the HALT utility) after each command executed. To resume execution after the HALT, press Enter at the HALT prompt (>>).
Compiled application programs are not affected by SET SINGLESTEP.
The SET SINGLESTEP command is not affected by the SET RESET and SET RESTORE commands.
To switch to singlestep, use
> set trace on
> set singlestep on
Now, if you execute an application program, it looks like this:
> DoCusts (“edit”)
procedure DoCusts (in ExMode)
>>output $setcount
35
>>(carriage return)
let dp = $true
>>.
.
.
See Also
Truncates a decimal number, making it an integer.
$truncate(number)| number | a number, or an expression that evaluates to a number |
Number, with no decimal places.
$truncate(2.49)
Evaluates to 2.
$truncate(2.99)
Evaluates to 2.
int1 - $truncate(int1/int2) * int2
Performs int1 modulo int2. Can also be expressed as $modulus(int1,int2).
Trims trailing blanks from a character string.
$ttrim(string)| string | a character string, or any expression that evaluates to a character string |
Character string.
Use $ttrim to remove trailing spaces from a character string.
For output purposes, the implicit length of the result returned by $ttrim is the same as the length of string.
$ttrim (LastName)
Evaluates to “Smith” if LastName is stored as “Smith “.
detail line $concat($ttrim(LastName),", ",FirstName)
Displays a last name first in a report.
Indicates a positive value (unary +) or adds two values.
[expression1]+expression2
The plus sign (+) adds the expression on the right to the expression on the left.
| expression1 | a number or expression that evaluates to a number |
| expression2 | a number or expression that evaluates to a number |
Arithmetic operators indicate the sign of a number or perform arithmetic operations (addition, subtraction, multiplication, division, exponentiation).
Converts alphabetic characters to upper case.
$toupper(source)| source | any value, or an expression that yields any value |
Character string, in which all letters are uppercase.
$toupper returns a character string in which all letters are upper case. If source is not of a character data type, it is converted to a character data type before the function is applied.
$toupper("the QUICK BROWN fox is 30 years oLD")Evaluates to “THE QUICK BROWN FOX IS 30 YEARS OLD”.
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