cx_Oracle如何将复合/复杂数组传递给PLSQL过程？

Question

从这guide我能够将简单数据类型的关联数组（如cx_Oracle.NUMBER）传递给PL/SQL过程。

CREATE OR REPLACE PACKAGE test 
IS 
    TYPE t_ids IS TABLE OF NUMBER INDEX BY PLS_INTEGER; 
    PROCEDURE foo(p_ids_i IN t_ids); 
END; 
/

要叫它：

ids = cursor.arrayvar(cx_Oracle.NUMBER, [1,2,3]) 
cursor.callproc('test.foo', [ids]) 

---

不过，我想打电话给下面的过程，而不是foo这需要一个复杂类型来代替。

CREATE OR REPLACE PACKAGE test 
IS 
    TYPE r_foo IS RECORD (id NUMBER, name VARCHAR2(10)); 
    TYPE t_complex IS TABLE OF r_foo INDEX BY PLS_INTEGER; 
    PROCEDURE foo(p_ids_i IN t_complex); 
END; 
/

我已经试过像各种各样的事情：

# Raises NotSupportedError: Variable_TypeByPythonType(): unhandled data type 
foos = cursor.arrayvar((cx_Oracle.NUMBER, cx_Oracle.STRING), [(1, 'foo'), (2, 'bar')]) 

# Raises NotSupportedError: Variable_MakeArray(): type does not support arrays 
foos = cur.arrayvar(cx_Oracle.OBJECT, [(1, 'foo'), (2, 'bar')]) 

---

以下是失败的：

# Raises DatabaseError: ORA-04043: object TEST.R_FOO does not exist 
record_type = conn.gettype('TEST.R_FOO') 

它看起来像您可以在包外创建一个类型，参考。

CREATE TYPE t_foo IS TABLE OF NUMBER; -- Not an Associative Array 

引用它：

t = conn.gettype('T_FOO') 

但是，你不许一个包外创建关联数组的记录。我可以用一个对象替换RECORD，但我想不出任何可以替换关联数组的东西，这是cx_Oracle可以传入或传出的唯一集合类型。

---

全码：

PL/SQL：

 

-- returns 12.1.0.2.0 
SELECT VERSION FROM v$instance; 

CREATE OR REPLACE PACKAGE test 
IS 
    TYPE r_foo IS RECORD (id NUMBER, name VARCHAR2(10)); 
    TYPE t_complex IS TABLE OF r_foo INDEX BY PLS_INTEGER; 
    PROCEDURE foo(p_ids_i IN t_complex); 
END; 
/

CREATE OR REPLACE PACKAGE BODY test 
IS 
    PROCEDURE foo(p_ids_i IN t_complex) 
    IS 
    BEGIN 
     FOR i IN p_ids_i.FIRST .. p_ids_i.LAST LOOP 
      DBMS_OUTPUT.PUT_LINE(p_ids_i(i).id || ' ' || p_ids_i(i).name); 
     END LOOP; 
    END; 
END; 
/

-- The following works as expected. 
DECLARE 
    l_complex test.t_complex; 
BEGIN 
    l_complex(1).id := 1; 
    l_complex(1).name := 'Matthew'; 

    l_complex(2).id := 2; 
    l_complex(2).name := 'Moisen'; 

    test.foo(l_complex); 
END; 

的Python：

 
import cx_Oracle 

print cx_Oracle.version # 5.3 
print cx_Oracle.clientversion() # (12, 1, 0, 2, 0) 

conn = cx_Oracle.connect('username/password@sid') 
cur = conn.cursor() 

result = cur.execute("SELECT * FROM user_source WHERE name = 'TEST' and type = 'PACKAGE'") 

# This prints the package spec successfully 
for row in result: 
    print row 

# Raises DatabaseError: ORA-04043: object TEST.R_FOO does not exist 
conn.gettype('TEST.R_FOO') 

# Raises DatabaseError: ORA-04043: object TEST.T_COMPLEX does not exist 
conn.gettype('TEST.T_COMPLEX') 

# This raises the appropriate exception saying I called the procedure 
# incorrectly, demonstrating that I have access to it. 
cur.callproc('TEST.FOO', []) 

---

与$ ORACLE_HOME和等重新安装cx_Oracle设置为我的12C客户端后，我能够得到进一步，但仍然在append操作中出现错误。

 
import cx_Oracle 

conn = cx_Oracle.connect('username/password@sid') 

# This no longer raises an error 
recordTypeObj = conn.gettype('TEST.R_FOO') 
tableTypeObj = conn.gettype('TEST.T_COMPLEX') 
rec = recordTypeObj.newobject() 
tab = tableTypeObj.newobject() 

# This works fine 
rec.ID = 1 
rec.NAME = "foo" 

# This fails with 
# cx_Oracle.NotSupportedError: Object_ConvertFromPython(): unhandled data type 250 
tab.append(rec) 

Answer 1

这在cx_Oracle 5.3及更高版本中受支持。你必须使用支持这种事情的“对象”语法。

import cx_Oracle 

conn = cx_Oracle.Connection("cx_Oracle/dev@localhost/orcl") 
recordTypeObj = conn.gettype("TEST.R_FOO") 
tableTypeObj = conn.gettype("TEST.T_COMPLEX") 

tab = tableTypeObj.newobject() 

rec = recordTypeObj.newobject() 
rec.ID = 1 
rec.NAME = "foo" 
tab.append(rec) 

rec = recordTypeObj.newobject() 
rec.ID = 2 
rec.NAME = "bar" 
tab.append(rec) 

cursor = conn.cursor() 
cursor.callproc("test.foo", [tab])