ORA-01795: maximum number of expressions in a list

看ORA-01795中给出的内容是SQL语句的 expressions 中list接受的最大值是1000，查了下ORA-01795的说明，确定问题出在IN后括号里的主键值超过1000上

解决思路：将 SQL 中超过1000个的in list转换为 id in (1,2,3...999) or id in (1000,1001....1999) ...
或者考虑换成exist 语句，对于后表比前表 大数据量的情况时 ，用exist性能也有提升。

   StringBuffer sb = new StringBuffer();
            for (int i = 0; i < columnContents.size(); i++) {
                if (PluginConst.EMPTY_STRING.equals(columnContents.get(i))) {
                    continue;
                }
                if ((i % 1000) == 0 && i > 0) {
                    sb.deleteCharAt(sb.length() - 1);
                    sb.append(") OR " + columnName + " IN ( '"
                            + columnContents.get(i) + "',"); // resolved
                    // resolved ORA-01795 problem.
                } else {
                    sb.append("'" + columnContents.get(i) + "',");
                }
            }
            // delete the last comma
            sb.deleteCharAt(sb.length() - 1);
            String selectSQL = "SELECT * FROM " + tableName + " WHERE "
                    + columnName + " IN ( " + sb.toString() + " )";