Example of how Python uses cx_Oracle to call Oracle stored procedures

This article mainly introduces how Python uses cx_Oracle to call Oracle stored procedures. It analyzes the specific steps and related operating techniques of calling PL/SQL through cx_Oracle in Python based on specific examples. Friends in need can refer to it

The example in this article describes how Python uses cx_Oracle to call Oracle stored procedures. Share it with everyone for your reference, the details are as follows:

The main test here is to call PL/SQL through cx_Oracle in Python.

First, create a simple stored procedure on the database side.

create or replace procedure test_msg(i_user in varchar2, o_msg out varchar2) is
begin
 o_msg := i_user ||', Good Morning!';
end;

Then, start making stored procedure calls in the Python command line.

import cx_Oracle as cx
conn = cx.connect('database connecting string')
cursor = conn.cursor()
#声明变量
user = 'Nick' #plsql入参
msg = cursor.var(cx_Oracle.STRING) #plsql出参
#调用存储过程
cursor.callproc('test_msg', [user, msg]) #['Nick', 'Nick, Good Morning!']
#打印返回值
print msg #<cx_Oracle.STRING with value &#39;Nick, Good Morning!&#39;>
print msg.getvalue() #Nick, Good Morning!
#资源关闭
cursor.close()
conn.close()

Extended reading:

There is conversion between stored procedures, cx_Oracle, and Python object types relation. The details are as follows:

##VARCHAR2, NVARCHAR2, LONG cx_Oracle.STRINGstrCHARcx_Oracle.FIXED_CHARstrNUMBERcx_Oracle.NUMBERintFLOATcx_Oracle.NUMBERfloatDATEcx_Oracle.DATETIMEdatetime.datetimeTIMESTAMPcx_Oracle.TIMESTAMPdatetime.datetimeCLOBcx_Oracle.CLOBcx_Oracle.LOBBLOBcx_Oracle.BLOBcx_Oracle.LOB

Oracle	cx_Oracle	Python

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