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\_SPATIAL\_SIMPLIFY
<a name="SYS_SPATIAL_SIMPLIFY"></a>

You can query the system view SYS\_SPATIAL\_SIMPLIFY to get information about simplified spatial geometry objects using the COPY command. When you use COPY on a shapefile, you can specify SIMPLIFY `tolerance`, SIMPLIFY AUTO, and SIMPLIFY AUTO `max_tolerance` ingestion options. The result of the simplification is summarized in SYS\_SPATIAL\_SIMPLIFY system view. 

When SIMPLIFY AUTO `max_tolerance` is set, this view contains a row for each geometry that exceeded the maximum size. When SIMPLIFY `tolerance` is set, then one row for the entire COPY operation is stored. This row references the COPY query ID and the specified simplification tolerance.

For more information about loading a shapefile, see [Loading a shapefile into Amazon Redshift](spatial-copy-shapefile.md).

SYS\_SPATIAL\_SIMPLIFY 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
<a name="SYS_SPATIAL_SIMPLIFY-table-columns"></a>


| Column name  | Data type  | Description  | 
| --- | --- | --- | 
| query\_id  | bigint  | The ID of the query (COPY command) that generated this row.  | 
| line\_number  | bigint  | When COPY SIMPLIFY AUTO option is specified, this value is the record number of the simplified record in the shapefile.  | 
| maximum\_tolerance  | double precision  | The distance tolerance value specified in the COPY command. This is either the maximum tolerance value using the SIMPLIFY AUTO option, or the fixed tolerance value using the SIMPLIFY option.  | 
| initial\_size  | bigint  | The size in bytes of the GEOMETRY data value before simplification.  | 
| simplified  | char(1)  | When the COPY SIMPLIFY AUTO option is specified, t if the geometry was successfully simplified, or f otherwise. The geometry might not be simplified successfully if after the simplification with the given maximum tolerance its size is still larger than the maximum geometry size.  | 
| final\_size  | bigint  | When the COPY SIMPLIFY AUTO option is specified, this is the size in bytes of the geometry after simplification. | 
| final\_tolerance  | double precision  | Final tolerance chosen for the simplification.  | 

## Sample query
<a name="SYS_SPATIAL_SIMPLIFY-sample-query"></a>

The following query returns the list of records that COPY simplified. 

```
SELECT * FROM sys_spatial_simplify;
                
             
 query_id | line_number | maximum_tolerance | initial_size | simplified | final_size |   final_tolerance
----------+-------------+-------------------+--------------+------------+------------+----------------------
    20    |     1184704 |                -1 |      1513736 | t          |    1008808 |   1.276386653895e-05
    20    |     1664115 |                -1 |      1233456 | t          |    1023584 | 6.11707814796635e-06
```