1
我想从现有表中创建插入语句。但是，我最终面临着ORA-00900的问题。令人惊讶的是，当我使用execute immediate独立执行结果时，它工作正常。立即执行ORA-00900
让我们创建2个表：
create table a (
name varchar2 (100),
age integer
);
insert into a values ('Tom', 1);
commit;
insert into a values ('John', 2);
commit;
create table b (
name varchar2 (100),
age integer
);
insert into b values ('Jane', 1);
commit;
insert into b values ('Eric', 2);
commit;
现在，这里是我的工作得到的数据块。该块将使用SQL Plus。命令行参数将是：
SQL> @export.ddl my_schema a,b
现在，我不写SET陈述在这里。
/* export.ddl */
declare
p_schema_name varchar2(1000) := upper('&1');
p_table_names varchar2(4000) := upper('&2');
l_statement varchar2(30000);
type tmp_table is table of varchar2(30000);
l_result tmp_table;
begin
for c_table in (
select
regexp_substr (replace(p_table_names, ' ', ''), '[^,]+', 1, level) as t_name
from dual
connect by
regexp_substr (replace(p_table_names, ' ', ''), '[^,]+', 1, level) is not null)
loop
for c_col in (
select
'''select '''||ins.insert_stmt||'('||recs.select_rows||''')'''' stmt from '||recs.owner||'.'||recs.table_name||'''' as statement
from (
select
atc.owner,
atc.table_name,
''||listagg(case when atc.data_type = 'VARCHAR2' then '''''||decode('||atc.column_name||', null, ''''null'''', ''''''''''''''''||'||atc.column_name||'||'''''''''''''''')||'''
when atc.data_type = 'NUMBER' then '''''||decode('||atc.column_name||', null, ''''null'''', '||atc.column_name||')||'''
when atc.data_type = 'DATE' then 'to_date(''''''||to_char('||atc.column_name||', ''DD-MON-YYYY HH24:MI:SS'')||'''''', ''''DD-MON-YYYY HH24:MI:SS'''')'
end, ''', ') within group (order by atc.column_id) as select_rows
from dba_tab_columns atc
where atc.table_name in (c_table.t_name) -- here
group by atc.owner, atc.table_name) recs,
(
select
atc.owner,
atc.table_name,
'''insert into '||atc.owner||'.'||atc.table_name||' ('||listagg(atc.column_name, ', ') within group (order by atc.column_id)||') VALUES ' as insert_stmt
from all_tab_columns atc
where atc.table_name in (c_table.t_name) -- here
group by atc.owner, atc.table_name
) ins
where recs.owner = ins.owner
and recs.table_name = ins.table_name)
loop
l_statement := c_col.statement;
dbms_output.put_line(l_statement);
execute immediate l_statement bulk collect into l_result;
for i in 1 .. l_result.count() loop
dbms_output.put_line(l_result(i));
end loop;
end loop;
end loop;
end;
在这段代码我的脸：
ORA-00900: invalid SQL statement
ORA-06512: at line 44
这是立即执行的语句的行号。
但是，如果我只复制DBMS_OUTPUT（注释掉执行即时发言和下面的循环），它是：
'select ''insert into MY_SCHEMA.A (NAME, AGE) VALUES (''||decode(NAME, null, ''null'', ''''''''||NAME||'''''''')||'', ''||decode(AGE, null, ''null'', AGE)||'')'' stmt from MY_SCHEMA.A'
'select ''insert into MY_SCHEMA.B (NAME, AGE) VALUES (''||decode(NAME, null, ''null'', ''''''''||NAME||'''''''')||'', ''||decode(AGE, null, ''null'', AGE)||'')'' stmt from MY_SCHEMA.B'
而且使用它像：
/* second.ddl */
declare
l_statememt varchar2(30000);
type typ_varcharlist IS TABLE OF VARCHAR2(30000);
col_list typ_varcharlist;
statemement varchar2(30000) := 'select ''insert into MY_SCHEMA.A (NAME, AGE) VALUES (''||decode(NAME, null, ''null'', ''''''''||NAME||'''''''')||'', ''||decode(AGE, null, ''null'', AGE)||'')'' stmt from MY_SCHEMA.A';
begin
execute immediate statemement bulk collect into col_list;
for i in 1 .. col_list.count() loop
dbms_output.put_line(col_list(i));
end loop;
end;
然后我得到所需要的输出它是：
insert into MY_SCHEMA.A (NAME, AGE) VALUES ('Tom', 1)
insert into MY_SCHEMA.A (NAME, AGE) VALUES ('John', 2)
我的问题是： 为什么执行imm ediate在第一个代码（export.ddl）中给我错误？我能做些什么来阻止它，并从第二步（second.ddl）中拯救我自己？
这意味着，使用一个脚本来获取insert语句，比如insert.ddl脚本。
在此先感谢:-)
谢谢亚历克斯。这当然回答了我的问题和许多问题。 – Jaanna