Access predefined opaque data types

HCL OneDB™ implements several built-in data types as predefined opaque data types. These data types are opaque data types for which support functions and the database definition are provided. For example, the smart-large-object data types, CLOB and BLOB, as an opaque data type called clob and blob are implemented. uses the ifx_lo_t structure, called an LO-pointer, to access the smart large objects. This structure is defined in the locator.h header file.

Therefore, you declare host variables for database columns of type CLOB or BLOB as a fixed binary host variable, 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;