alter table add column redshift
ALTER TABLE table_name
{
ADD table_constraint
| DROP CONSTRAINT constraint_name [ RESTRICT | CASCADE ]
| OWNER TO new_owner
| RENAME TO new_name
| RENAME COLUMN column_name TO new_name
| ALTER COLUMN column_name TYPE new_data_type
| ALTER COLUMN column_name ENCODE new_encode_type
| ALTER DISTKEY column_name
| ALTER DISTSTYLE ALL
| ALTER DISTSTYLE EVEN
| ALTER DISTSTYLE KEY DISTKEY column_name
| ALTER DISTSTYLE AUTO
| ALTER [COMPOUND] SORTKEY ( column_name [,...] )
| ALTER SORTKEY AUTO
| ALTER SORTKEY NONE
| ADD [ COLUMN ] column_name column_type
[ DEFAULT default_expr ]
[ ENCODE encoding ]
[ NOT NULL | NULL ] |
| DROP [ COLUMN ] column_name [ RESTRICT | CASCADE ] }
where table_constraint is:
[ CONSTRAINT constraint_name ]
{ UNIQUE ( column_name [, ... ] )
| PRIMARY KEY ( column_name [, ... ] )
| FOREIGN KEY (column_name [, ... ] )
REFERENCES reftable [ ( refcolumn ) ]}
The following options apply only to external tables:
SET LOCATION { 's3://bucket/folder/' | 's3://bucket/manifest_file' }
| SET FILE FORMAT format |
| SET TABLE PROPERTIES ('property_name'='property_value')
| PARTITION ( partition_column=partition_value [, ...] )
SET LOCATION { 's3://bucket/folder' |'s3://bucket/manifest_file' }
| ADD [IF NOT EXISTS]
PARTITION ( partition_column=partition_value [, ...] ) LOCATION { 's3://bucket/folder' |'s3://bucket/manifest_file' }
[, ... ]
| DROP PARTITION ( partition_column=partition_value [, ...] )