Amazon Redshift will no longer support the creation of new Python UDFs starting Patch 198. Existing Python UDFs will continue to function until June 30, 2026. For more information, see the [ blog post ](https://aws.amazon.com/blogs/big-data/amazon-redshift-python-user-defined-functions-will-reach-end-of-support-after-june-30-2026/).
# SYS\$1LOAD\$1HISTORY
Use SYS\$1LOAD\$1HISTORY to view details of COPY commands. Each row represents a COPY command with accumulated statistics for some of the fields. It contains both running and finished COPY commands.
SYS\$1LOAD\$1HISTORY is visible to all users. Superusers can see all rows; regular users can see only their own data. For more information, see [Visibility of data in system tables and views](cm_chap_system-tables.md#c_visibility-of-data).
## Table columns
[\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/redshift/latest/dg/SYS_LOAD_HISTORY.html)
## Sample queries
The following query shows the loaded rows, bytes, tables, and datasource of specific copy commands.
```
SELECT query_id,
table_name,
data_source,
loaded_rows,
loaded_bytes
FROM sys_load_history
WHERE query_id IN (6389,490791,441663,74374,72297)
ORDER BY query_id,
data_source DESC;
```
Sample output.
```
query_id | table_name | data_source | loaded_rows | loaded_bytes
----------+------------------+-----------------------------------------------------------------------+-------------+---------------
6389 | store_returns | s3://load-test/data-sources/tpcds/2.8.0/textfile/1T/store_returns/ | 287999764 | 1196240296158
72297 | web_site | s3://load-test/data-sources/tpcds/2.8.0/textfile/1T/web_site/ | 54 | 43808
74374 | ship_mode | s3://load-test/data-sources/tpcds/2.8.0/textfile/1T/ship_mode/ | 20 | 1320
441663 | income_band | s3://load-test/data-sources/tpcds/2.8.0/textfile/1T/income_band/ | 20 | 2152
490791 | customer_address | s3://load-test/data-sources/tpcds/2.8.0/textfile/1T/customer_address/ | 6000000 | 722924305
```
The following query shows the loaded rows, bytes, tables, and datasource of copy commands.
```
SELECT query_id,
table_name,
data_source,
loaded_rows,
loaded_bytes
FROM sys_load_history
ORDER BY query_id DESC
LIMIT 10;
```
Sample output.
```
query_id | table_name | data_source | loaded_rows | loaded_bytes
----------+------------------------+-----------------------------------------------------------------------------+-------------+-----------------
491058 | web_site | s3://load-test/data-sources/tpcds/2.8.0/textfile/1T/web_site/ | 54 | 43808
490947 | web_sales | s3://load-test/data-sources/tpcds/2.8.0/textfile/1T/web_sales/ | 720000376 | 22971988122819
490923 | web_returns | s3://load-test/data-sources/tpcds/2.8.0/textfile/1T/web_returns/ | 71997522 | 96597496325
490918 | web_page | s3://load-test/data-sources/tpcds/2.8.0/textfile/1T/web_page/ | 3000 | 1320
490907 | warehouse | s3://load-test/data-sources/tpcds/2.8.0/textfile/1T/warehouse/ | 20 | 1320
490902 | time_dim | s3://load-test/data-sources/tpcds/2.8.0/textfile/1T/time_dim/ | 86400 | 1320
490876 | store_sales | s3://load-test/data-sources/tpcds/2.8.0/textfile/1T/store_sales/ | 2879987999 | 151666241887933
490870 | store_returns | s3://load-test/data-sources/tpcds/2.8.0/textfile/1T/store_returns/ | 287999764 | 1196405607941
490865 | store | s3://load-test/data-sources/tpcds/2.8.0/textfile/1T/store/ | 1002 | 365507
```
The following query shows the daily loaded rows and bytes of the copy command.
```
SELECT date_trunc('day',start_time) AS exec_day,
SUM(loaded_rows) AS loaded_rows,
SUM(loaded_bytes) AS loaded_bytes
FROM sys_load_history
GROUP BY exec_day
ORDER BY exec_day DESC;
```
Sample output.
```
exec_day | loaded_rows | loaded_bytes
---------------------+-------------+------------------
2022-01-20 00:00:00 | 6347386005 | 258329473070606
2022-01-19 00:00:00 | 19042158015 | 775198502204572
2022-01-18 00:00:00 | 38084316030 | 1550294469446883
2022-01-17 00:00:00 | 25389544020 | 1033271084791724
2022-01-16 00:00:00 | 19042158015 | 775222736252792
2022-01-15 00:00:00 | 19834245387 | 798122849155598
2022-01-14 00:00:00 | 75376544688 | 3077040926571384
```