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Don Burleson Blog 







Select remote table DDL Tips

Oracle Database Tips by Donald BurlesonDecember 15, 2015

Question:  I want to be able to display the DDL for a remote table over a database link.  The dbms_metadata does not appear to do this.  Is there a trick for displaying remote DDL?

Answer:  Here is a trick to allow you to display the DDL for a remote table.

 CREATE OR REPLACE FUNCTION read_remote_ddl( p_type varchar2,p_name varchar2,p_schema varchar2,p_link varchar2 default null)
c_ddl CLOB;
v_ddl varchar(4000);
v_link varchar2(30);
v_sql varchar(400);
v_len number;
IF p_link is null
v_sql:= 'select dbms_metadata.get_ddl('''||p_type||''','''||p_name||''','''||p_schema||''') from dual';
execute immediate v_sql into c_ddl;
v_sql:= 'select dbms_lob.getlength@'||p_link||'(dbms_metadata.get_ddl@'||p_link||'('''||p_type||''','''||p_name||''','''||p_schema||''')) from dual@'||p_link;
execute immediate v_sql into v_len;
for i in 0..trunc(v_len/4000) loop
v_sql:= 'select dbms_lob.substr@'||p_link||'(dbms_metadata.get_ddl@'||p_link||'('''||p_type||''','''||p_name||''','''||p_schema||'''),4000,'||to_char(i*4000+1)||') from dual@'||p_link;
execute immediate v_sql into v_ddl;
end loop;
RETURN c_ddl;
END read_remote_ddl;

Then you can run the remote DDL display procedure it like this to get the remote DDL:



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