string_to_value

Use this to create a new Value from a single string representation.

The preferred_type can optionally ask this to return a Value of the requested type (but if such a value can't be created from string, then null is returned); pass INVALID if any returned type is acceptable.

The returned value is either a new Value or null in the following cases: - string cannot be converted to preferred_type type - the provider does not handle preferred_type - the provider could not make a Value from string

If dbms_type is not null, then if will contain a constant string representing the database type used for the conversion if the conversion was successfull, or null otherwise.

Parameters:

this	a server provider.
cnc	a Connection object, or null
string	the SQL string to convert to a value
preferred_type	a Type, or INVALID
dbms_type	place to get the actual database type used if the conversion succeeded, or null

Returns:

a new Value, or null