[CBRD-24939] dblink query could return zero column count in column info. #4595
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http://jira.cubrid.org/browse/CBRD-24939
To get column information from dblink, cci_get_result_info (req, &stmt_type, &col_cnt) is used. At this time, col_cnt can be 0, which should be treated as an error, but there is a bug that has not been handled.