调整缓区大小
SQL> set arraysize 1
SQL> set echo off
SQL> set heading off
SQL> set feedback off
SQL> set verify off
SQL> set pagesize 0
SQL> set linesize 79
select * from user_constraints u where u.table_name=Upper(‘Toperator’);
select dbms_metadata.get_ddl(‘CONSTRAINT’, ‘PK_TOPERATOR’, ‘TRADE’) FROM DUAL;
先记在这儿，有空再整理！
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