Difference between revisions of "VARTYPE()"
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==Class== | ==Class== | ||
Expressions and Type Conversion | Expressions and Type Conversion | ||
Revision as of 13:57, 21 October 2009
Class
Expressions and Type Conversion
Purpose
Function to return a letter code that represents a data type
Syntax
VARTYPE(<exp>[,<expL>])
See Also
ERROR(), ERRNO(), MESSAGE(), TYPE(), ON ERROR
Description
The VARTYPE() function returns a letter code which represents the data type of the expression in <exp>. The return value of the letter code is a character string from the table below.
| Data type | Return Value |
|---|---|
| ARRAY (STATIC) | A |
| ARRAY (DYNAMIC | O |
| BIGINT | N |
| BIT | L |
| BYTE | N |
| CHARACTER | C |
| CURRENCY | Y |
| DATE | D |
| DATETIME | T |
| DECIMAL | N |
| DOUBLE | N |
| FLOAT | N |
| GENERAL | G |
| INTEGER | N |
| LOGICAL | L |
| LONG VARCHAR | M |
| LONG VARBINARY | G |
| MEDIUMINT | N |
| MEMO | M |
| NULL | X |
| NUMERIC | N |
| OBJECT | O |
| PACKED | N |
| QUAD | N |
| REAL | N |
| SHORT | N |
| SMALLINT | N |
| Syntax error | U |
| TEXT | M |
| TIME | C |
| TIMESTAMP | T |
| TINYINT | N |
| Undefined | U |
| VAXDATE | C |
| VARCHAR | C |
| ZONED NUMERIC | C |
If <exp> contains a syntax error, or an undeclared variable, then VARTYPE() returns 'U'. VARTYPE() will also return a 'U' for an undefined variable if SET CLIPPER is ON. Unlike the TYPE() function, VARTYPE() does not require the expression for evaluation to be enclosed in quotes.
The optional <expL> is used to determine whether VARTYPE() returns the data type for expressions which evaluate to null (.NULL.). If <expL> is True (.T.) the data type is returned for <exp>. If <expL> is False (.F.), then VARTYPE() returns "X".
Example
i = 10 ? vartype(i) N
Products
Recital Database Server, Recital Mirage Server, Recital Terminal Developer
