DBMS_METADATA.set_transform_param格式化輸出獲得DDL
--輸出信息采用縮排或換行格式化
EXEC DBMS_METADATA.set_transform_param(DBMS_METADATA.session_transform, 'PRETTY', TRUE);
--確保每個語句都帶分號
EXEC DBMS_METADATA.set_transform_param(DBMS_METADATA.session_transform, 'SQLTERMINATOR', TRUE);
--關閉表索引、外鍵等關聯（后面單獨生成）
EXEC DBMS_METADATA.set_transform_param(DBMS_METADATA.session_transform, 'CONSTRAINTS', FALSE);
EXEC DBMS_METADATA.set_transform_param(DBMS_METADATA.session_transform, 'REF_CONSTRAINTS', FALSE);
EXEC DBMS_METADATA.set_transform_param(DBMS_METADATA.session_transform, 'CONSTRAINTS_AS_ALTER', FALSE);
--關閉存儲、表空間屬性
EXEC DBMS_METADATA.set_transform_param(DBMS_METADATA.session_transform, 'STORAGE', FALSE);
EXEC DBMS_METADATA.set_transform_param(DBMS_METADATA.session_transform, 'TABLESPACE', FALSE);
--關閉創建表的PCTFREE、NOCOMPRESS等屬性
EXEC DBMS_METADATA.set_transform_param(DBMS_METADATA.session_transform, 'SEGMENT_ATTRIBUTES', FALSE);
18.11.1 Using a PL/SQL Package to Display Information About Schema Objects
The Oracle-supplied PL/SQL package procedure DBMS_METADATA.GET_DDL lets you obtain metadata (in the form of DDL used to create the object) about a schema object.
See Also:
Oracle Database PL/SQL Packages and Types Reference for a description of the DBMS_METADATA package
Example: Using the DBMS_METADATA Package
The DBMS_METADATA package is a powerful tool for obtaining the complete definition of a schema object. It enables you to obtain all of the attributes of an object in one pass. The object is described as DDL that can be used to (re)create it.
In the following statements the GET_DDL function is used to fetch the DDL for all tables in the current schema, filtering out nested tables and overflow segments. The SET_TRANSFORM_PARAM (with the handle value equal to DBMS_METADATA.SESSION_TRANSFORM meaning "for the current session") is used to specify that storage clauses are not to be returned in the SQL DDL. Afterwards, the session-level transform parameters are reset to their defaults. Once set, transform parameter values remain in effect until specifically reset to their defaults.
EXECUTE DBMS_METADATA.SET_TRANSFORM_PARAM( DBMS_METADATA.SESSION_TRANSFORM,'STORAGE',false); SELECT DBMS_METADATA.GET_DDL('TABLE',u.table_name) FROM USER_ALL_TABLES u WHERE u.nested='NO' AND (u.iot_type is null or u.iot_type='IOT'); EXECUTE DBMS_METADATA.SET_TRANSFORM_PARAM( DBMS_METADATA.SESSION_TRANSFORM,'DEFAULT');
The output from DBMS_METADATA.GET_DDL is a LONG data type. When using SQL*Plus, your output may be truncated by default. Issue the following SQL*Plus command before issuing the DBMS_METADATA.GET_DDL statement to ensure that your output is not truncated:
SQL> SET LONG 9999