Question

I have the following table defined at postgresql:

        Column      |          Type          | Modifiers 
-----------------+------------------------+-----------
 id              | uuid                   | not null
 entity_snapshot | text                   | 
Indexes:
    "pk_id" PRIMARY KEY, btree (id)

I would like to store the following JSon string:

[ "org.test.MyUniqueId", {:   "uuid" : "f4b40050-9716-4346-bf84-8325fadd9876": } ]

for some testing, instead of doing this using Jackson, I try to type an SQL manually, and here is my problem – I can’t seem to get ti right.

My current attempt is:

insert into my_table(id,entity_snapshot) values ('d11d944e-6e78-11e1-aae1-52540015fc3f','[ \"org.test.MyUniqueId\", {:   \"uuid\" : \"f4b40050-9716-4346-bf84-8325fadd9876\": } ]');

Procuedure a record that looks like what I need when I select from the table, but when I try to use Jackson to parse it I get an error –

org.apache.commons.lang.SerializationException: org.codehaus.jackson.JsonParseException: Unexpected character (':' (code 58)): was expecting double-quote to start field name

Needless to say that if the same record is inserted via my java code , I can get it parsed and when it comes to looking at the record with human eyes, it looks the same to me.

Can you tell me where I am wrong in my SQL insert statement?

Answer 1

Double quotes inside single quotes do not need any escaping.

insert into my_table (id,entity_snapshot)
values 
(
   'd11d944e-6e78-11e1-aae1-52540015fc3f',
   '["org.test.MyUniqueId", {: "uuid" : "f4b40050-9716-4346-bf84-8325fadd9876": }]'
);

will work just fine:

postgres=> create table my_table (id uuid, entity_snapshot text);
CREATE TABLE
Time: 34,936 ms
postgres=> insert into my_table (id,entity_snapshot)
postgres-> values
postgres-> (
postgres(>    'd11d944e-6e78-11e1-aae1-52540015fc3f',
postgres(>    '["org.test.MyUniqueId", {: "uuid" : "f4b40050-9716-4346-bf84-8325fadd9876": }]'
postgres(> );
INSERT 0 1
Time: 18,255 ms
postgres=>