Bagaimana saya bisa mengurai string JSON di PL/SQL

Dengan versi 11.0.4 (tentu saja tidak ada versi 11.0.4) Anda memiliki setidaknya dua pilihan (selain menulis parser sendiri) :

Bergantung pada versi RDBMS yang Anda gunakan, berikut adalah beberapa opsi:

Yang pertama:untuk Oracle 11.1.0.7 dan lebih tinggi, instal Apex 5 dan gunakan apex_json paket:

-- here I have 12.1.0.1 version with version 5 of apex installed

column ora_version format a21;
column apex_version format a21;


select (select version from v$instance) as ora_version
     , (select version_no from apex_release) as apex_version
  from dual;

--drop table test_2;
/* our test table */  
create table test_2(
  c_a date,
  c_b date,
  c_c number,
  c_d number,
  c_e number
);

select * from test_2;

declare
  l_json_doc clob; 
begin
  dbms_output.put_line('Parsing json...');
  l_json_doc := '{"a":"01/01/2015","b":"31/12/2015",
                  "c":"11111111111","d":"1111111111",
                  "e":"1234567890"}';
  apex_json.parse(l_json_doc);
  insert into test_2(c_a, c_b, c_c, c_d, c_e)
    values(apex_json.get_date(p_path=>'a', p_format=>'dd/mm/yyyy'),
           apex_json.get_date(p_path=>'b', p_format=>'dd/mm/yyyy'),
           to_number(apex_json.get_varchar2(p_path=>'c')),
           to_number(apex_json.get_varchar2(p_path=>'d')),
           to_number(apex_json.get_varchar2(p_path=>'e')));
  commit;
  dbms_output.put_line('Done!');
end;
/

column c_c format 99999999999;
select to_char(c_a, 'dd/mm/yyyy') as c_a
     , to_char(c_b, 'dd/mm/yyyy') as c_b
     , c_c
     , c_d
     , c_e 
  from test_2;

Hasil:

ORA_VERSION           APEX_VERSION         
--------------------- ---------------------
12.1.0.1.0            5.0.2.00.07          

1 row selected.

Table created.

no rows selected.

Parsing json...
Done!
PL/SQL procedure successfully completed.


C_A        C_B                 C_C        C_D        C_E
---------- ---------- ------------ ---------- ----------
01/01/2015 31/12/2015  11111111111 1111111111 1234567890

1 row selected.

Yang kedua:Gunakan opensource PL/JSON . Belum pernah menggunakannya sebelumnya, jadi saya mengambil kesempatan ini untuk mencobanya. Ini sangat mirip dengan apex_json .

declare
  l_json      json;  --json object
  l_json_doc  clob;
begin
  dbms_output.put_line('Parsing json...');

  -- parsing is done upon object instantiation

  l_json_doc := '{"a":"01/01/2015","b":"31/12/2015",
                  "c":"11111111111","d":"1111111111",
                  "e":"1234567890"}';
  l_json := json(l_json_doc);


  insert into test_2(c_a, c_b, c_c, c_d, c_e)
    values(to_date(l_json.get('a').get_string, 'dd-mm-yyyy'),
           to_date(l_json.get('b').get_string, 'dd-mm-yyyy'),
           to_number(l_json.get('c').get_string),
           to_number(l_json.get('d').get_string),
           to_number(l_json.get('e').get_string));
  commit;
  dbms_output.put_line('Done!');
end;

column c_c format 99999999999;
select to_char(c_a, 'dd/mm/yyyy') as c_a
     , to_char(c_b, 'dd/mm/yyyy') as c_b
     , c_c
     , c_d
     , c_e 
  from test_2;

Hasil:

C_A        C_B                 C_C        C_D        C_E
---------- ---------- ------------ ---------- ----------
01/01/2015 31/12/2015  11111111111 1111111111 1234567890
01/01/2015 31/12/2015  11111111111 1111111111 1234567890

2 rows selected.

Pengenalan json_table() dalam rilis 12.1.0.2 membuat parsing JSON sedikit lebih sederhana (hanya untuk demonstrasi):

insert into test_2
  select to_date(c_a, 'dd-mm-yyyy')
       , to_date(c_b, 'dd-mm-yyyy')
       , c_c
       , c_d
       , c_e
    from json_table('{"a":"01/01/2015",
                      "b":"31/12/2015",
                      "c":"11111111111",
                      "d":"1111111111",
                      "e":"1234567890"}'
                    , '$' 
                    columns ( 
                       c_a varchar2(21) path '$.a',
                       c_b varchar2(21) path '$.b',
                       c_c varchar2(21) path '$.c',
                       c_d varchar2(21) path '$.d',
                       c_e varchar2(21) path '$.e'
                    )) ;

hasil:

 select *
   from test_2;


C_A         C_B                C_C        C_D        C_E
----------- ----------- ---------- ---------- ----------
1/1/2015    12/31/2015  1111111111 1111111111 1234567890