Postgres 16

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create table test2 (a text);
insert into test2 select array['1dim',array['2dim',array['3dim']]];

CREATE TABLE

ERROR:  malformed array literal: "2dim"
LINE 2: insert into test2 select array['1dim',array['2dim',array['3d...
                                                    ^
DETAIL:  Array value must start with "{" or dimension information.

create table test2 (a text[]);
insert into test2 select array['1dim',array['2dim',array['3dim']]];

CREATE TABLE

ERROR:  malformed array literal: "2dim"
LINE 2: insert into test2 select array['1dim',array['2dim',array['3d...
                                                    ^
DETAIL:  Array value must start with "{" or dimension information.

create table test2 (a text[][]);
insert into test2 select array['1dim',array['2dim',array['3dim']]];

CREATE TABLE

ERROR:  malformed array literal: "2dim"
LINE 2: insert into test2 select array['1dim',array['2dim',array['3d...
                                                    ^
DETAIL:  Array value must start with "{" or dimension information.

create table test2 (a jsonb);
insert into test2 select array['1dim',array['2dim',array['3dim']]];

CREATE TABLE

ERROR:  malformed array literal: "2dim"
LINE 2: insert into test2 select array['1dim',array['2dim',array['3d...
                                                    ^
DETAIL:  Array value must start with "{" or dimension information.

create table test2 (a jsonb[]);
insert into test2 select array['1dim',array['2dim',array['3dim']]];

CREATE TABLE

ERROR:  malformed array literal: "2dim"
LINE 2: insert into test2 select array['1dim',array['2dim',array['3d...
                                                    ^
DETAIL:  Array value must start with "{" or dimension information.

create table test2 (a jsonb[][]);
insert into test2 select array['1dim',array['2dim',array['3dim']]];

CREATE TABLE

ERROR:  malformed array literal: "2dim"
LINE 2: insert into test2 select array['1dim',array['2dim',array['3d...
                                                    ^
DETAIL:  Array value must start with "{" or dimension information.

create table test2 (a boolean);
insert into test2 select array['1dim',array['2dim',array['3dim']]];

CREATE TABLE

ERROR:  malformed array literal: "2dim"
LINE 2: insert into test2 select array['1dim',array['2dim',array['3d...
                                                    ^
DETAIL:  Array value must start with "{" or dimension information.

create table test2 (a bigint);
insert into test2 select array['1dim',array['2dim',array['3dim']]];

CREATE TABLE

ERROR:  malformed array literal: "2dim"
LINE 2: insert into test2 select array['1dim',array['2dim',array['3d...
                                                    ^
DETAIL:  Array value must start with "{" or dimension information.