我有一个过程,它接收一个where子句(即where col1 = 1
)作为参数。我使用此子句在一些表中使用EXECUTE IMMEDIATE语句进行搜索,并将结果插入到嵌套表中,然后显示。
如果找到任何数据,该过程正常,但如果没有找到数据,则抛出上述错误。
有人可以解释导致此错误的原因吗?
以下是程序:
create or replace procedure prc_checks(pi_where varchar2) as
cursor c_tables is
select object_name,
case object_name
when 'XP_IMPORT_MW' THEN 99999999
when 'XP_IMPORT_MW_ARCH' THEN 99999998
else TO_NUMBER(SUBSTR(object_name, -8, 8))
end to_order
from dba_objects
where object_type = 'TABLE'
and object_name IN ('XP_IMPORT_MW', 'XP_IMPORT_MW_ARCH')
or REGEXP_LIKE (object_name, 'XP_IMPORT_MW_ARCH_201(5|6|7)[0-9]{4}') order by 2 desc;
type t_result is table of xp_import_mw%rowtype;
v_result t_result;
v_sql varchar2(300);
BEGIN
for i in c_tables
loop
v_sql := 'select * from ' || i.object_name || ' ' || pi_where;
execute immediate v_sql bulk collect into v_result;
if v_result.count > 0
then
for j in v_result.first .. v_result.last
loop
dbms_output.put_line(v_result(j).art_nr);
end loop;
dbms_output.put_line('... the required information was found on table name ' || upper(i.object_name));
exit;
end if;
end loop;
END prc_checks;
答案 0 :(得分:2)
您将得到这个是光标找到的表之一,其列数少于xp_import_mw
。例如:
create table xp_import_mw (col1 number, art_nr number, dummy number);
create table xp_import_mw_arch_20160102 (col1 number, art_nr number, dummy number);
create table xp_import_mw_arch_20160101 (col1 number, art_nr number);
insert into xp_import_mw_arch_20160101 values (1, 42);
因此主xp_import_mw
表有三列但没有匹配的数据。其中一个旧存档表的列数较少。
我在程序中添加了dbms_output.put_line(v_sql)
以查看它失败的表,然后运行它:
set serveroutput on
exec prc_checks('where col1 = 1');
得到了输出:
select * from XP_IMPORT_MW where col1 = 1
select * from XP_IMPORT_MW_ARCH_20160102 where col1 = 1
select * from XP_IMPORT_MW_ARCH_20160101 where col1 = 1
Error starting at line : 49 in command -
BEGIN prc_checks('where col1 = 1'); END;
Error report -
ORA-01007: variable not in select list
ORA-06512: at "MY_SCHEMA.PRC_CHECKS", line 25
ORA-06512: at line 1
01007. 00000 - "variable not in select list"
*Cause:
*Action:
所以问题不在于没有找到数据;问题是是匹配表中具有错误结构的数据。
您可以根据xp_import_mw
表的结构构建选择列表,而不是使用*
;它不会让它失败,但至少会给你一个稍微有用的错误信息 - 在这种情况下是ORA-00904: "DUMMY": invalid identifier
而不是ORA-01007。
您可以通过以下方式快速粗略地检查是否存在差异:
select table_name, count(column_id) as column_count,
listagg(column_name, ',') within group (order by column_id) as columns
from dba_tab_columns
where table_name IN ('XP_IMPORT_MW', 'XP_IMPORT_MW_ARCH')
or REGEXP_LIKE (table_name, 'XP_IMPORT_MW_ARCH_201(5|6|7)[0-9]{4}')
group by table_name
having count(column_id) != (
select count(column_id) from dba_tab_columns where table_name = 'XP_IMPORT_MW'
);
...虽然如果您正在使用dba_*
或all_*
视图,那么您应该在此处和程序中包含所有者。