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oceanbase.DBA_SUBPART_HISTOGRAMS
更新时间:2026-04-03 17:31:08
说明
该视图从 V4.0.0 版本开始引入。
功能描述
展示本租户所有子分区表的二级分区的直方图数据(每个直方图的端点)。
字段说明
| 字段名称 | 类型 | 是否可以为 NULL | 描述 |
|---|---|---|---|
| OWNER | varchar(128) | NO | 表的所有者 |
| TABLE_NAME | varchar(128) | NO | 直方图所属表名 |
| SUBPARTITION_NAME | varchar(128) | NO | 直方图所属二级分区名 |
| COLUMN_NAME | varchar(128) | NO | 直方图所属列名 |
| ENDPOINT_NUMBER | decimal(10,0) | NO | Bucket 累积的频次 |
| ENDPOINT_VALUE | decimal(10,0) | NO | Bucket 端点归一化值 |
| ENDPOINT_ACTUAL_VALUE | text | NO | Bucket 端点值 |
| ENDPOINT_ACTUAL_VALUE_RAW | text | NO | Bucket 端点二进制值 |
| ENDPOINT_REPEAT_COUNT | decimal(10,0) | NO | Bucket 端点值的频次 |
查询示例
系统租户查看本租户的分区表 sales_subpart 的二级分区的直方图信息。
obclient [oceanbase]> SELECT * FROM oceanbase.DBA_SUBPART_HISTOGRAMS WHERE TABLE_NAME ='sales_subpart';
查询结果如下:
+----------+---------------+-------------------+-------------+-----------------+----------------+-----------------------+---------------------------+-----------------------+
| OWNER | TABLE_NAME | SUBPARTITION_NAME | COLUMN_NAME | ENDPOINT_NUMBER | ENDPOINT_VALUE | ENDPOINT_ACTUAL_VALUE | ENDPOINT_ACTUAL_VALUE_RAW | ENDPOINT_REPEAT_COUNT |
+----------+---------------+-------------------+-------------+-----------------+----------------+-----------------------+---------------------------+-----------------------+
| test | sales_subpart | p2023sp0 | quantity | 127 | NULL | 1 | 04053F0001 | 127 |
| test | sales_subpart | p2023sp0 | product_id | 127 | NULL | 8 | 04053F0008 | 63 |
| test | sales_subpart | p2023sp0 | product_id | 64 | NULL | 4 | 04053F0004 | 64 |
| test | sales_subpart | p2023sp1 | quantity | 190 | NULL | 1 | 04053F0001 | 190 |
| test | sales_subpart | p2023sp1 | product_id | 190 | NULL | 9 | 04053F0009 | 63 |
| test | sales_subpart | p2023sp1 | product_id | 127 | NULL | 5 | 04053F0005 | 63 |
| test | sales_subpart | p2023sp1 | product_id | 64 | NULL | 1 | 04053F0001 | 64 |
| test | sales_subpart | p2023sp2 | quantity | 127 | NULL | 1 | 04053F0001 | 127 |
| test | sales_subpart | p2023sp2 | product_id | 127 | NULL | 6 | 04053F0006 | 63 |
| test | sales_subpart | p2023sp2 | product_id | 64 | NULL | 2 | 04053F0002 | 64 |
| test | sales_subpart | p2023sp3 | quantity | 191 | NULL | 1000 | 04053F00E807 | 6 |
| test | sales_subpart | p2023sp3 | quantity | 185 | NULL | 1 | 04053F0001 | 185 |
| test | sales_subpart | p2023sp3 | product_id | 191 | NULL | 999 | 04053F00E707 | 64 |
| test | sales_subpart | p2023sp3 | product_id | 127 | NULL | 7 | 04053F0007 | 63 |
| test | sales_subpart | p2023sp3 | product_id | 64 | NULL | 3 | 04053F0003 | 64 |
| test | sales_subpart | p2024sp0 | quantity | 73 | NULL | 1 | 04053F0001 | 73 |
| test | sales_subpart | p2024sp0 | product_id | 73 | NULL | 8 | 04053F0008 | 37 |
| test | sales_subpart | p2024sp0 | product_id | 36 | NULL | 4 | 04053F0004 | 36 |
| test | sales_subpart | p2024sp1 | quantity | 110 | NULL | 1 | 04053F0001 | 110 |
| test | sales_subpart | p2024sp1 | product_id | 110 | NULL | 9 | 04053F0009 | 37 |
| test | sales_subpart | p2024sp1 | product_id | 73 | NULL | 5 | 04053F0005 | 37 |
| test | sales_subpart | p2024sp1 | product_id | 36 | NULL | 1 | 04053F0001 | 36 |
| test | sales_subpart | p2024sp2 | quantity | 73 | NULL | 1 | 04053F0001 | 73 |
| test | sales_subpart | p2024sp2 | product_id | 73 | NULL | 6 | 04053F0006 | 37 |
| test | sales_subpart | p2024sp2 | product_id | 36 | NULL | 2 | 04053F0002 | 36 |
| test | sales_subpart | p2024sp3 | quantity | 109 | NULL | 1000 | 04053F00E807 | 4 |
| test | sales_subpart | p2024sp3 | quantity | 105 | NULL | 1 | 04053F0001 | 105 |
| test | sales_subpart | p2024sp3 | product_id | 109 | NULL | 999 | 04053F00E707 | 36 |
| test | sales_subpart | p2024sp3 | product_id | 73 | NULL | 7 | 04053F0007 | 37 |
| test | sales_subpart | p2024sp3 | product_id | 36 | NULL | 3 | 04053F0003 | 36 |
+----------+---------------+-------------------+-------------+-----------------+----------------+-----------------------+---------------------------+-----------------------+
30 rows in set
相关视图或文档
查看表级的直方图统计信息:DBA_TAB_HISTOGRAMS
查看 Partition 级的直方图统计信息:DBA_PART_HISTOGRAMS
查看表级的列统计信息:DBA_TAB_STATISTICS
查看 Global 级的列统计信息:DBA_TAB_COL_STATISTICS
查看 Partition 级的列统计信息:DBA_PART_COL_STATISTICS
查看 Subpartition 级的列统计信息:DBA_SUBPART_HISTOGRAMS
查看索引统计信息:DBA_IND_STATISTICS
有关如何收集统计信息,参见以下文档: