Declare a host variable

Declare host variables for database columns of type CLOB or BLOB as a fixed binary host variable with the ifx_lo_t structure (called an ifx_lo_t data type) as follows: 
EXEC SQL include locator;
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EXEC SQL BEGIN DECLARE SECTION;
   fixed binary 'clob' ifx_lo_t clob_loptr;
   fixed binary 'blob' ifx_lo_t blob_loptr;
EXEC SQL END DECLARE SECTION;
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EXEC SQL select blobcol into :blob_loptr from tab1;
Tip: For more information about the fixed binary data type, see Access a fixed-length opaque type.

To access smart large objects, you must include the locator.h header file in your program. This header file contains definitions of data structures and constants that your program needs to work with smart large objects.