Oracle C++ Call Interface Programmer's Guide

Data Conversions
Data Conversions
VARRAW
The external datatype VARRAW is similar to the external datatype RAW, except that
the first two bytes contain the length of the data. The specified length of the string
in a bind or a define call must include the two length bytes. So the largest VARRAW
string that can be received or sent is 65533 bytes, not 65535. For converting longer
strings, use the LONG VARRAW datatype.
Table 4–5 lists the supported conversions from Oracle internal datatypes to external
datatypes, and from external datatypes to internal column representations. Note the
following conditions:
■ A REF stored in the database is converted to OCCI_SQLT_REF on output
■ OCCI_SQLT_REF is converted to the internal representation of a REF on input
■ A named datatype stored in the database is converted to OCCI_SQLT_NTY (and
represented by a C structure in the application) on output
■ OCCI_SQLT_NTY (represented by a C structure in an application) is converted
to the internal representation of the corresponding datatype on input
■ A LOB and a BFILE are represented by descriptors in OCCI applications, so
there are no input or output conversions
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