escaping of double quote with text type column at postgresql and json parsing via jackson

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 do…

Accepted Answer

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=>
```

escaping of double quote with text type column at postgresql and json parsing via jackson

Solution

Problem