Hi all:
When i exec function jsonb_array_length(jsonb)，The database throw a error: cannot get array length of a scalar
That's because have a 'null' value in the jsonb type column
So i have a test and think null is a bug for jsonb:
mydb=# \d test
Table "public.test"
Column | Type | Collation | Nullable | Default
----------+-----------------------------+-----------+----------+----------------------------------
id | integer | | not null | nextval('test_id_seq'::regclass)
info | text | | |
crt_time | timestamp without time zone | | |
col_n | jsonb | | |
Indexes:
"test_pkey" PRIMARY KEY, btree (id)
mydb=# update test set col_n='test' where id=1;
ERROR: invalid input syntax for type json
LINE 1: update test set col_n='test' where id=1;
^
DETAIL: Token "test" is invalid.
CONTEXT: JSON data, line 1: test
mydb=# update test set col_n='null' where id=1;
UPDATE 1
mydb=#
mydb=#
mydb=# select * from test where id=1;
id | info | crt_time | col_n
----+------+----------------------------+-------
1 | test | 2017-12-13 15:14:16.347681 | null
(1 row)
