The ST_MPointFromWKB() function

The species_sitings table is created with three columns. The species and genus columns uniquely identify each row, while the sitings ST_MultiPoint stores the locations of the species sightings:

CREATE TABLE species_sitings (species  varchar(32),
                              genus    varchar(32),
                              sitings  ST_MultiPoint);

This code fragment populates the species_sitings table:

/* Create the SQL insert statement to populate the species_sitings
     * table. The question marks are parameter markers that indicate
     * the column values that will be inserted at run time. */
    sprintf(sql_stmt,
            "INSERT INTO species_sitings (species,genus,sitings) "
            "VALUES(?, ?, ST_MpointFromWKB(?, %d))", srid);
    
    /* Prepare the SQL statement for execution. */
    rc = SQLPrepare (hstmt, (unsigned char *)sql_stmt, SQL_NTS);

    /* Bind the species to the first parameter. */
    pcbvalue1 = species_len;
    rc = SQLBindParameter (hstmt, 1, SQL_PARAM_INPUT, SQL_C_CHAR,
                           SQL_CHAR, species_len, 0,
                           species, species_len, &pcbvalue1);

    /* Bind the genus to the second parameter. */
    pcbvalue2 = genus_len;
    rc = SQLBindParameter (hstmt, 2, SQL_PARAM_INPUT, SQL_C_CHAR,
                           SQL_CHAR, genus_len, 0,
                           genus, genus_len, &pcbvalue2);

    /* Bind the sitings geometry to the third parameter. */
    pcbvalue3 = sitings_wkb_len;
    rc = SQLBindParameter (hstmt, 3, SQL_PARAM_INPUT, SQL_C_BINARY,
                           SQL_INFX_UDT_LVARCHAR, sitings_wkb_len, 0,
                           sitings_wkb_buf, sitings_wkb_len, &pcbvalue3);

    /* Execute the insert statement. */
    rc = SQLExecute (hstmt);