RowSet.ColumnType

Method

RowSet.ColumnType(Index as Integer) As Integer

New in 2019r2

Supported for all project types and targets.

Returns an integer value for the data type of the passed column.

Data Types

Use the table below to identify the Column Type based on the ColumnType Integer (Not all databases use all these types).

ColumnType	Value	Description
Null	0	Denotes the absence of any value, i.e., a missing value.
Byte	1	Stores the byte representation of a character string.
SmallInt	2	A numeric data type with no fractional part. The maximum number of digits is implementation-specific, but is usually less than or equal to INTEGER. SQLiteDatabase supports 4-byte smallints. If you are using another data source, check the documentation of your data source.
Integer	3	A numeric data type with no fractional part. The maximum number of digits is implementation-specific. SQLiteDatabase supports 8-byte integer columns and the ColumnType evaluates to 19 (64-bit integer).
Char	4	Stores alphabetic data, in which you specify the maximum number of characters for the column, i.e., CHAR (20) for a 20 character column. If a row contains fewer than the maximum number of characters for the column, the remaining characters will be padded with blanks.
Text or VarChar	5	Stores alphabetic data, in which the number of characters vary from row to row, but you don't want to pad the unused characters with blanks. For example, "VARCHAR (20)" specifies a VARCHAR column with a maximum length of 20 characters.
Float	6	Stores floating-point numeric values with a precision that you specify, i.e., FLOAT (5).
Double	7	Stores double-precision floating-point numbers.
Date	8	Stores year, month, and day values of a date in the format YYYY-MM-DD. The year value is four digits; the month and day values are two digits.
Time	9	Stores hour, minute, and second values of a time in the format HH:MM:SS. The hours and minutes are two digits. The seconds values is also two digits, may include a optional fractional part, e.g., 09:55:25.248. The default length of the fractional part is zero.
TimeStamp	10	Stores both date and time information in the format YYYY-MM-DD HH:MM:SS. The lengths of the components of a TimeStamp are the same as for Time and Date, except that the default length of the fractional part of the time component is six digits rather than zero. If a TimeStamp values has no fractional component, then its length is 19 digits If it has a fractional component, its length is 20 digits, plus the length of the fractional component.
Currency	11	This is a 64-bit fixed-point number format that holds 15 digits to the left of the decimal point and 4 digits to the right.
Boolean	12	Stores the values of TRUE or FALSE.
Decimal	13	Stores a numeric value that can have both an integral and fractional part. You specify the total number of digits and the number of digits to the right of the decimal place, i.e., DECIMAL (5.2) specifies a decimal field that can contain values up to 999.99. DECIMAL (5) specifies a field that can contain values up to 99,999.
Binary	14	Stores code, images, and hexadecimal data. Consult the documentation of your data source for information on the maximum size of a Binary column.
Long Text (BLOB)	15	Stores a text object. Consult the documentation of your data source for information on the maximum size of a BLOB.
Long VarBinary (BLOB)	16	Stores a binary object. SQLiteDatabase supports BLOBs of up to any size. Furthermore, a blob can be stored in a column of any declared data affinity. If you are using another data source, check the documentation of your data source.
MacPICT	17	Stores a Macintosh PICT image. No longer supported. Use a BLOB to store images.
String	18	Text up to about 2 billion bytes. The same as VarChar.
Int64	19	Stores a 64-bit integer. Integer columns in SQLiteDatabase are 64 bits and ColumnType returns 19.
Unknown	255	Unrecognized data type.

Sample Code

This example puts the values of an Text/VarChar or String columns into an array

Var colType As Integer
Var values() As String

For i As Integer = 0 To rs.LastColumnIndex
colType = rs.ColumnType(i) // ColumnType is 0-based
If colType = 5 Or colType = 18 Then // The column is a String
values.AddRow(rs.ColumnAt(i).StringValue)
End If
Next