Chapter 9: Using Bulk Copy Transfer and Express Transfer

Datatype conversion for express transfer statements

The following table shows the acceptable source datatypes that the access service can convert into corresponding target destination datatypes.

**Table 9-2: Datatype conversions**
Source datatypes	Target datatypes
Source datatypes	CHAR, VARCHAR, LONGVARCHAR, TEXT (CLOB),	BIGINT, DECIMAL, DOUBLE FLOAT, INTEGER, MONEY, MONEY4, NUMERIC, REAL, SMALLINT, TINYINT	DATETIME, DATETIME4, TIMESTAMP	BINARY, VARBINARY, LONGVARBINARY, IMAGE (BLOB)	BIT
CHAR, VARCHAR, LONGVARCHAR, TEXT (CLOB)	X	X	X	X	X
BIGINT, DECIMAL, DOUBLE, FLOAT, INTEGER, MONEY, MONEY4, NUMERIC, REAL, SMALLINT, TINYINT	X	X
BINARY, VARBINARY, LONGVARBINARY, IMAGE (BLOB)	X			X
DATETIME, DATETIME4, TIMESTAMP	X		X
BIT	X	X			X

Datatypes resulting from this conversion are converted into actual datatypes in the target column, as shown in Table 9-2. If a column match is incompatible, the transfer ends with an error. If data conversion errors occur, you should try swapping the connections to the drivers used for the primary server and the secondary server.

The datatype conversions identified in Table 9-1 may not be available for express transfer. It varies and depends on the ODBC driver that is used.

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