从补丁 198 开始，Amazon Redshift 将不再支持创建新的 Python UDF。现有的 Python UDF 将继续正常运行至 2026 年 6 月 30 日。有关更多信息，请参阅[博客文章](https://www.amazonaws.cn/blogs/big-data/amazon-redshift-python-user-defined-functions-will-reach-end-of-support-after-june-30-2026/)。
# SYS\$1QUERY\$1DETAIL
使用 SYS\$1QUERY\$1DETAIL 查看不同指标级别的查询的详细信息，每行表示有关给定指标级别的特定 WLM 查询的详细信息。此视图包含许多类型的查询，例如 DDL、DML 和实用程序命令（例如：复制和卸载）。根据查询类型，某些列可能不相关。例如，external\$1scanned\$1bytes 与内部表无关。
SYS\$1QUERY\$1DETAIL 对所有用户可见。超级用户可以查看所有行；普通用户只能查看其自己的数据。有关更多信息，请参阅 [系统表和视图中的数据可见性](cm_chap_system-tables.md#c_visibility-of-data)。
**注意**
要验证包含已执行查询的事务是否成功提交，您需要在系统表和 `sys_transaction_history` 表之间执行联接操作。例如：
```
SELECT
th.transaction_id,
qd.query_id,
th.status AS transaction_status
FROM
sys_query_detail qd
LEFT JOIN sys_query_history qh ON qd.query_id = qh.query_id
LEFT JOIN sys_transaction_history th on qh.transaction_id = th.transaction_id;
```
## 表列
[\[See the AWS documentation website for more details\]](http://docs.amazonaws.cn/redshift/latest/dg/SYS_QUERY_DETAIL.html)
## 使用说明
SYS\$1QUERY\$1DETAIL 可以包含步骤、流、段和子查询级别的指标。除了引用 metrics\$1level 列外，还可以根据下表，通过引用 step\$1id、segment\$1id 和 stream\$1id 字段来查看给定行显示的指标级别。
[\[See the AWS documentation website for more details\]](http://docs.amazonaws.cn/redshift/latest/dg/SYS_QUERY_DETAIL.html)
## 示例查询
以下示例返回了 SYS\$1QUERY\$1DETAIL 的输出。
以下查询显示了步骤级别的查询元数据详细信息，包括步骤名称、input\$1bytes、output\$1bytes、input\$1rows、output\$1rows。
```
SELECT query_id,
child_query_sequence,
stream_id,
segment_id,
step_id,
trim(step_name) AS step_name,
duration,
input_bytes,
output_bytes,
input_rows,
output_rows
FROM sys_query_detail
WHERE query_id IN (193929)
ORDER BY query_id,
stream_id,
segment_id,
step_id DESC;
```
示例输出。
```
query_id | child_query_sequence | stream_id | segment_id | step_id | step_name | duration | input_bytes | output_bytes | input_rows | output_rows
----------+----------------------+-----------+------------+---------+------------+-----------------+-------------+--------------+------------+-------------
193929 | 2 | 0 | 0 | 3 | hash | 37144 | 0 | 9350272 | 0 | 292196
193929 | 5 | 0 | 0 | 3 | hash | 9492 | 0 | 23360 | 0 | 1460
193929 | 1 | 0 | 0 | 3 | hash | 46809 | 0 | 9350272 | 0 | 292196
193929 | 4 | 0 | 0 | 2 | return | 7685 | 0 | 896 | 0 | 112
193929 | 1 | 0 | 0 | 2 | project | 46809 | 0 | 0 | 0 | 292196
193929 | 2 | 0 | 0 | 2 | project | 37144 | 0 | 0 | 0 | 292196
193929 | 5 | 0 | 0 | 2 | project | 9492 | 0 | 0 | 0 | 1460
193929 | 3 | 0 | 0 | 2 | return | 11033 | 0 | 14336 | 0 | 112
193929 | 2 | 0 | 0 | 1 | project | 37144 | 0 | 0 | 0 | 292196
193929 | 1 | 0 | 0 | 1 | project | 46809 | 0 | 0 | 0 | 292196
193929 | 5 | 0 | 0 | 1 | project | 9492 | 0 | 0 | 0 | 1460
193929 | 3 | 0 | 0 | 1 | aggregate | 11033 | 0 | 201488 | 0 | 14
193929 | 4 | 0 | 0 | 1 | aggregate | 7685 | 0 | 28784 | 0 | 14
193929 | 5 | 0 | 0 | 0 | scan | 9492 | 0 | 23360 | 292196 | 1460
193929 | 4 | 0 | 0 | 0 | scan | 7685 | 0 | 1344 | 112 | 112
193929 | 2 | 0 | 0 | 0 | scan | 37144 | 0 | 7304900 | 292196 | 292196
193929 | 3 | 0 | 0 | 0 | scan | 11033 | 0 | 13440 | 112 | 112
193929 | 1 | 0 | 0 | 0 | scan | 46809 | 0 | 7304900 | 292196 | 292196
193929 | 5 | 0 | 0 | -1 | | 9492 | 12288 | 0 | 0 | 0
193929 | 1 | 0 | 0 | -1 | | 46809 | 16384 | 0 | 0 | 0
193929 | 2 | 0 | 0 | -1 | | 37144 | 16384 | 0 | 0 | 0
193929 | 4 | 0 | 0 | -1 | | 7685 | 28672 | 0 | 0 | 0
193929 | 3 | 0 | 0 | -1 | | 11033 | 114688 | 0 | 0 | 0
```
要按从最常用到最不常用的顺序查看数据库中的表，请使用以下示例。将 *sample\$1data\$1dev* 替换为您自己的数据库。请注意，此查询将计算从创建集群时开始的查询数量，但当您的数据仓库空间不足时，不会保存系统视图数据。
```
SELECT table_name, COUNT (DISTINCT query_id)
FROM SYS_QUERY_DETAIL
WHERE table_name LIKE 'sample_data_dev%'
GROUP BY table_name
ORDER BY COUNT(*) DESC;
+---------------------------------+-------+
| table_name | count |
+---------------------------------+-------+
| sample_data_dev.tickit.venue | 4 |
| sample_data_dev.myunload1.venue | 3 |
| sample_data_dev.tickit.listing | 1 |
| sample_data_dev.tickit.category | 1 |
| sample_data_dev.tickit.users | 1 |
| sample_data_dev.tickit.date | 1 |
| sample_data_dev.tickit.sales | 1 |
| sample_data_dev.tickit.event | 1 |
+---------------------------------+-------+
```
以下示例显示了单个 WLM 查询的不同指标级别。
```
SELECT query_id, child_query_sequence, stream_id, segment_id, step_id, step_name, start_time, end_time, metrics_level
FROM sys_query_detail
WHERE query_id = 1553 AND step_id = -1
ORDER BY stream_id, segment_id, step_id;
query_id | child_query_sequence | stream_id | segment_id | step_id | step_name | start_time | end_time | metrics_level
----------+----------------------+-----------+------------+---------+-----------+----------------------------+----------------------------+---------------
1553 | 1 | -1 | -1 | -1 | | 2024-10-17 02:28:49.814721 | 2024-10-17 02:28:49.847838 | child query
1553 | 1 | 0 | -1 | -1 | | 2024-10-17 02:28:49.814721 | 2024-10-17 02:28:49.835609 | stream
1553 | 1 | 0 | 0 | -1 | | 2024-10-17 02:28:49.824677 | 2024-10-17 02:28:49.830372 | segment
1553 | 1 | 1 | -1 | -1 | | 2024-10-17 02:28:49.835624 | 2024-10-17 02:28:49.845773 | stream
1553 | 1 | 1 | 1 | -1 | | 2024-10-17 02:28:49.84088 | 2024-10-17 02:28:49.842388 | segment
1553 | 1 | 1 | 2 | -1 | | 2024-10-17 02:28:49.835926 | 2024-10-17 02:28:49.844396 | segment
1553 | 1 | 2 | -1 | -1 | | 2024-10-17 02:28:49.846949 | 2024-10-17 02:28:49.847838 | stream
1553 | 1 | 2 | 3 | -1 | | 2024-10-17 02:28:49.847013 | 2024-10-17 02:28:49.847485 | segment
(8 rows)
```