执行like查询
如果物料代码的编码形于XXXXXX, 要查询574*的物料代码，可在代码中使用如下方法：
string pattern = "574___"; //因为物料编码为6位，所以添加三个下划线填充空位
if( (dstat = oiSqlCreateSelect( &sql )) ||
(dstat = oiSqlWhereBegParen(sql))||
(dstat = oiSqlWhereLike(sql, PartNumberAttr, pattern)) ||
(dstat = oiSqlWhereEndParen(sql)))
goto EXIT;
(dstat = oiSqlWhereBegParen(sql))||
(dstat = oiSqlWhereLike(sql, PartNumberAttr, pattern)) ||
(dstat = oiSqlWhereEndParen(sql)))
goto EXIT;
if(oiSqlAscOrder(sql, bbkSeqAttr)) goto EXIT;
dstat = QueryDbObject(objClass(thisObj), sql, MaxSize, TRUE, SC_SCOPE_WHERE_NECESSARY,
&objSet, mfail);
&objSet, mfail);
int size = low_set_size(objSet);
...