In this post, I am sharing a script for creating a copy of table including all data, constraints, indexes of a PostgreSQL source table.

I have seen that people are using simple CREATE TABLE AS SELECT… for creating a duplicate table.
But it will create a table with data and column structure only.

If we want a duplicate table with all possible structures like column, constraint, index, we should add INCLUDING ALL.

Check the below demonstration:

Create sample table with default, constraint, index:

CREATE TABLE tbl_A
(
    ID INT
    ,Name CHARACTER VARYING DEFAULT 'dbrnd'
    ,Subject CHARACTER VARYING CONSTRAINT chk_tbl_A_Subject CHECK (Subject IS NOT NULL)
    ,CONSTRAINT pk_tbl_A_ID PRIMARY KEY(ID)
);

CREATE INDEX idx_tbl_A_Subject ON tbl_A USING BTREE (Subject);

Create another simple copy table:

CREATE TABLE tbl_B AS SELECT * FROM tbl_A;

Check the table definition of tbl_b:
You cannot find any default, primary key, check or index. It just copied the plain columns.

CREATE TABLE public.tbl_b
(
    id integer,
    name character varying COLLATE pg_catalog."default",
    subject character varying COLLATE pg_catalog."default"
)
WITH (
    OIDS = FALSE
)
TABLESPACE pg_default;

Create another copy table using INCLUDING ALL:

CREATE TABLE tbl_C (LIKE tbl_A INCLUDING ALL);

Check the table definition of tbl_c:
You can find the definition of all constraints and index.

CREATE TABLE public.tbl_c
(
    id integer NOT NULL,
    name character varying COLLATE pg_catalog."default" DEFAULT 'dbrnd'::character varying,
    subject character varying COLLATE pg_catalog."default",
    CONSTRAINT tbl_c_pkey PRIMARY KEY (id),
    CONSTRAINT chk_tbl_a_subject CHECK (subject IS NOT NULL)
)
WITH (
    OIDS = FALSE
)
TABLESPACE pg_default;