Viewing distribution styles - Amazon Redshift
Services or capabilities described in Amazon Web Services documentation might vary by Region. To see the differences applicable to the China Regions, see Getting Started with Amazon Web Services in China (PDF).

Amazon Redshift will no longer support the creation of new Python UDFs starting November 1, 2025. If you would like to use Python UDFs, create the UDFs prior to that date. Existing Python UDFs will continue to function as normal. For more information, see the blog post .

Viewing distribution styles

To view the distribution style of a table, query the PG_CLASS_INFO view or the SVV_TABLE_INFO view.

The RELEFFECTIVEDISTSTYLE column in PG_CLASS_INFO indicates the current distribution style for the table. If the table uses automatic distribution, RELEFFECTIVEDISTSTYLE is 10, 11, or 12, which indicates whether the effective distribution style is AUTO (ALL), AUTO (EVEN), or AUTO (KEY). If the table uses automatic distribution, the distribution style might initially show AUTO (ALL), then change to AUTO (EVEN) or AUTO (KEY) when the table grows.

The following table gives the distribution style for each value in RELEFFECTIVEDISTSTYLE column:

RELEFFECTIVEDISTSTYLE Current distribution style
0 EVEN
1 KEY
8 ALL
10 AUTO (ALL)
11 AUTO (EVEN)
12 AUTO (KEY)

The DISTSTYLE column in SVV_TABLE_INFO indicates the current distribution style for the table. If the table uses automatic distribution, DISTSTYLE is AUTO (ALL), AUTO (EVEN), or AUTO (KEY).

The following example creates four tables using the three distribution styles and automatic distribution, then queries SVV_TABLE_INFO to view the distribution styles. 


create table public.dist_key (col1 int)
diststyle key distkey (col1);

insert into public.dist_key values (1);

create table public.dist_even (col1 int)
diststyle even;

insert into public.dist_even values (1);

create table public.dist_all (col1 int)
diststyle all;

insert into public.dist_all values (1);

create table public.dist_auto (col1 int);

insert into public.dist_auto values (1);

select "schema", "table", diststyle from SVV_TABLE_INFO
where "table" like 'dist%';

        schema   |    table        | diststyle
     ------------+-----------------+------------
      public     | dist_key        | KEY(col1)
      public     | dist_even       | EVEN
      public     | dist_all        | ALL
      public     | dist_auto       | AUTO(ALL)