将MySQL转储导入Postgres并转义\\

Question

I received a MYSQL dump and needs to push it into the Postgres table.

Inside this poi_dump.sql dump, there are many rows of insert. The example as below:

Insert into table values (1,'hello','\rthis is a beautiful Alan\'s cottage', '\nbyebye')
Insert into table values (1,'hello','\rthis is a big\"Work', '\nbyebye')

I am using PSQL command:

psql analytics < poi_dump.sql

However, the postgres does not recognize all the \\ used to escape in a ' ' field.

Errors From Postgres:
Query buffer reset (cleared).
invalid command \nOn
invalid command \n
invalid command \'
invalid command \'
invalid command \'
invalid command \n
invalid command \"Without
invalid command \nPort-a-loo
Query buffer reset (cleared).
invalid command \n

How can i make postgres to accept those \\r ,\\n , 's inside a quote field?

Answer 1

PostgreSQL doesn't recognize backslash in string by default. But this behave can be simply changed:

ides_jmmaj_prac=# select 'hello\nworld';
┌──────────────┐
│   ?column?   │
╞══════════════╡
│ hello\nworld │
└──────────────┘
(1 row)

Time: 0,496 ms
ides_jmmaj_prac=# set standard_conforming_strings TO off;
SET
Time: 0,251 ms
ides_jmmaj_prac=# select 'hello\nworld';
WARNING:  nonstandard use of escape in a string literal
ŘÁDKA 1: select 'hello\nworld';
                ^
DOPORUČENÍ:  Use the escape string syntax for escapes, e.g., E'\r\n'.
┌──────────┐
│ ?column? │
╞══════════╡
│ hello   ↵│
│ world    │
└──────────┘
(1 row)

Time: 0,496 ms

Disable warnings by:

set escape_string_warning to off;

Probably \\r should be removed. PostgreSQL using Unix end of lines - only \\n (I didn't test it).