PostgreSQL ALTER TABLE

Research query: PostgreSQL ALTER TABLE · jobs: 1 · on-topic sources: 1 · review: Thin

Overview

PostgreSQL: Documentation: 16: ALTER TABLE October 15, 2026: PostgreSQL 19 RC 1 Released! — PostgreSQL: Documentation: 16: ALTER TABLE (2026)

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Deep look

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PostgreSQL: Documentation: 16: ALTER TABLE (2026)

PostgreSQL: Documentation: 16: ALTER TABLE October 15, 2026: PostgreSQL 19 RC 1 Released! (new this job) — source

Documentation → PostgreSQL 16 Supported Versions: Current (18) / 17 / 16 / 15 / 14 Development Versions: 19 / devel Unsupported versions: 13 / 12 / 11 / 10 / 9.6 / 9.5 / 9.4 / 9.3 / 9.2 / 9.1 / 9.0 / 8.4 / 8.3 / 8.2 / 8.1 / 8.0 / 7.4 / 7.3 / 7.2 / 7.1 ALTER TABLE Prev Up SQL Commands Home Next ALTER TABLE ALTER TABLE — change the definition of a table Synopsis ALTER TABLE [ IF EXISTS ] [ ONLY ] name [ * ] action [, ... ] ALTER TABLE [ IF EXISTS ] [ ONLY ] name [ * ] RENAME [ COLUMN ] column_name TO new_column_name ALTER TABLE [ IF EXISTS ] [ ONLY ] name [ * ] RENAME CONSTRAINT constraint_name TO new_constraint_name ALTER TABLE [ IF EXISTS ] name RENAME TO new_name ALTER TABLE [ IF EXISTS ] name SET SCHEMA new_schema ALTER TABLE ALL IN TABLESPACE name [ OWNED BY role_name [, ... ] ] SET TABLESPACE new_tablespace [ NOWAIT ] ALTER TABLE [ IF EXISTS ] name ATTACH PARTITION partition_name { FOR VALUES partition_bound_spec | DEFAULT } ALTER TABLE [ IF EXISTS ] name DETACH PARTITION partition_name [ CONCURRENTLY | FINALIZE ] where action is one of: ADD [ COLUMN ] [ IF NOT EXISTS ] column_name data_type [ COLLATE collation ] [ column_constraint [ ... ] ] DROP [ COLUMN ] [ IF EXISTS ] column_name [ RESTRICT | CASCADE ] ALTER [ COLUMN ] column_name [ SET DATA ] TYPE data_type [ COLLATE collation ] [ USING expression ] ALTER [ COLUMN ] column_name SET DEFAULT expression ALTER [ COLUMN ] column_name DROP DEFAULT ALTER [ COLUMN ] column_name { SET | DROP } NOT NULL ALTER [ COLUMN ] column_name DROP EXPRESSION [ IF EXISTS ] ALTER [ COLUMN ] column_name ADD GENERATED { ALWAYS | BY DEFAULT } AS IDENTITY [ ( sequence_options ) ] ALTER [ COLUMN ] column_name { SET GENERATED { ALWAYS | BY DEFAULT } | SET sequence_option | RESTART [ [ WITH ] restart ] } [...] ALTER [ COLUMN ] column_name DROP IDENTITY [ IF EXISTS ] ALTER [ COLUMN ] column_name SET STATISTICS integer ALTER [ COLUMN ] column_name SET ( attribute_option = value [, ... ] ) ALTER [ COLUMN ] column_name RESET ( attribute_option [, ... ] ) ALTER [ COLUMN ] column_name SET STORAGE { PLAIN | EXTERNAL | EXTENDED | MAIN | DEFAULT } ALTER [ COLUMN ] column_name SET COMPRESSION compression_method ADD table_constraint [ NOT VALID ] ADD table_constraint_using_index ALTER CONSTRAINT constraint_name [ DEFERRABLE | NOT DEFERRABLE ] [ INITIALLY DEFERRED | INITIALLY IMMEDIATE ] VALIDATE CONSTRAINT constraint_name DROP CONSTRAINT [ IF EXISTS ] constraint_name [ RESTRICT | CASCADE ] DISABLE TRIGGER [ trigger_name | ALL | USER ] ENABLE TRIGGER [ trigger_name | ALL | USER ] ENABLE REPLICA TRIGGER trigger_name ENABLE ALWAYS TRIGGER trigger_name DISABLE RULE rewrite_rule_name ENABLE RULE rewrite_rule_name ENABLE REPLICA RULE rewrite_rule_name ENABLE ALWAYS RULE rewrite_rule_name DISABLE ROW LEVEL SECURITY ENABLE ROW LEVEL SECURITY FORCE ROW LEVEL SECURITY NO FORCE ROW LEVEL SECURITY CLUSTER ON index_name SET WITHOUT CLUSTER SET WITHOUT OIDS SET ACCESS METHOD new_access_method SET TABLESPACE new_tablespace SET { LOGGED | UNLOGGED } SET ( storage_parameter [= value] [, ... ] ) RESET ( storage_parameter [, ... ] ) INHERIT parent_table NO INHERIT parent_table OF type_name NOT OF OWNER TO { new_owner | CURRENT_ROLE | CURRENT_USER | SESSION_USER } REPLICA IDENTITY { DEFAULT | USING INDEX index_name | FULL | NOTHING } and partition_bound_spec is: IN ( partition_bound_expr [, ...] ) | FROM ( { partition_bound_expr | MINVALUE | MAXVALUE } [, ...] ) TO ( { partition_bound_expr | MINVALUE | MAXVALUE } [, ...] ) | WITH ( MODULUS numeric_literal, REMAINDER numeric_literal ) and column_constraint is: [ CONSTRAINT constraint_name ] { NOT NULL | NULL | CHECK ( expression ) [ NO INHERIT ] | DEFAULT default_expr | GENERATED ALWAYS AS ( generation_expr ) STORED | GENERATED { ALWAYS | BY DEFAULT } AS IDENTITY [ ( sequence_options ) ] | UNIQUE [ NULLS [ NOT ] DISTINCT ] index_parameters | PRIMARY KEY index_parameters | REFERENCES reftable [ ( refcolumn ) ] [ MATCH FULL | MATCH PARTIAL | MATCH SIMPLE ] [ ON DELETE referential_action ] [ ON UPDATE referential_action ] } [ DEFERRABLE | NOT DEFERRABLE ] [ INITIALLY DEFERRED | INITIALLY IMMEDIATE ] and table_constraint is: [ CONSTRAINT constraint_name ] { CHECK ( expression ) [ NO INHERIT ] | UNIQUE [ NULLS [ NOT ] DISTINCT ] ( column_name [, ... ] ) index_parameters | PRIMARY KEY ( column_name [, ... ] ) index_parameters | EXCLUDE [ USING index_method ] ( exclude_element WITH operator [, ... ] ) index_parameters [ WHERE ( predicate ) ] | FOREIGN KEY ( column_name [, ... ] ) REFERENCES reftable [ ( refcolumn [, ... ] ) ] [ MATCH FULL | MATCH PARTIAL | MATCH SIMPLE ] [ ON DELETE referential_action ] [ ON UPDATE referential_action ] } [ DEFERRABLE | NOT DEFERRABLE ] [ INITIALLY DEFERRED | INITIALLY IMMEDIATE ] and table_constraint_using_index is: [ CONSTRAINT constraint_name ] { UNIQUE | PRIMARY KEY } USING INDEX index_name [ DEFERRABLE | NOT DEFERRABLE ] [ INITIALLY DEFERRED | INITIALLY IMMEDIATE ] index_parameters in UNIQUE, PRIMARY KEY, and EXCLUDE constraints are: [ INCLUDE ( column_name [, ... ] ) ] [ WITH ( storage_parameter [= value] [, ... ] ) ] [ USING INDEX TABLESPACE tablespace_name ] exclude_element in an EXCLUDE constraint is: { column_name | ( expression ) } [ COLLATE collation ] [ opclass [ ( opclass_parameter = value [, ... ] ) ] ] [ ASC | DESC ] [ NULLS { FIRST | LAST } ] referential_action in a FOREIGN KEY/REFERENCES constraint is: { NO ACTION | RESTRICT | CASCADE | SET NULL [ ( column_name [, ... ] ) ] | SET DEFAULT [ ( column_name [, ... ] ) ] } Description ALTER TABLE changes the definition of an existing table. (new this job) — source

You must own the table to use ALTER TABLE. (new this job) — source

Review

Status Thin. Verified claims 3. On-topic sources 1 (reused 0). Dropped 0 collector hit(s) and 0 off-topic local claim(s). Conflicts 0. Coverage: postgresql, alter, table.

Map

Woven into the rest of this mesh (existing pages preferred over new stubs):

• PostgreSQL CREATE TABLE — shared label · topic overlap (weight 8)
• PostgreSQL DELETE — shared label · topic overlap (weight 5)
• PostgreSQL functions — shared label · topic overlap (weight 5)
• PostgreSQL INSERT — shared label · topic overlap (weight 5)
• PostgreSQL JSON — shared label · topic overlap (weight 5)
• PostgreSQL UPDATE — shared label · topic overlap (weight 5)

Provenance

Sealed job 86189dfc91e5a9374034360d7b2eae14. Shards: agent.scout. Dropped 0 off-topic collector hit(s) and 0 off-topic local claim(s). Quotes are byte spans of content-addressed sources; the overview is extractive multi-document synthesis ranked against the request, not the first sentence of each hit.