这是11g。我有一个INSERT ALL语句,它使用SELECT来构建要插入的值。 select有一些子查询,用于检查记录是否已经存在。问题是插入时间超过30分钟,即使插入零行。 select语句本身就会立即运行,因此问题似乎是它与INSERT ALL一起使用时。我重写了使用MERGE的声明,但它同样糟糕。
该表没有触发器。主键索引和两个列上的唯一约束,但没有其他任何看起来可能导致问题。它目前有大约15000行,所以绝对不大。
是否有人建议可能导致此问题,或如何进行调试?
这是INSERT ALL语句。
insert all
into template_letter_merge_fields (merge_field_id, letter_type_id,table_name,field_name,pretty_name, tcl_proc)
values (template_let_mrg_fld_sequence.nextval,letter_type_id,table_name,field_name, pretty_name, tcl_proc)
select lt.letter_type_id,
i.object_type as table_name,
i.interface_key as field_name,
i.pretty_name as pretty_name,
case
when w.widget = 'dynamic_select' then
'dbi::'||i.interface_key||'::get_name'
when w.widget = 'category_tree' and
i.interface_key not like '%_name' and
i.interface_key not like '%_desc' then
'dbi::'||i.interface_key||'::get_name'
else
'dbi::'||i.interface_key||'::get_value'
end as tcl_proc
from template_letter_types lt,
dbi_interfaces i
left outer join acs_attributes aa on (aa.object_type||'_'||aa.attribute_name = i.interface_key
and decode(aa.object_type,'person','party','aims_organisation','party',aa.object_type) = i.object_type)
left outer join flexbase_attributes fa on fa.acs_attribute_id = aa.attribute_id
left outer join flexbase_widgets w on w.widget_name = fa.widget_name
where i.object_type IN (select linked_object_type
from template_letter_object_map lom
where lom.interface_object_type = lt.interface_object_type
union select lt.interface_object_type from dual
union select 'template_letter' from dual)
and lt.interface_object_type = lt.interface_object_type
and not exists (select 1
from template_letter_merge_fields m
where m.sql_code is null
and m.field_name = i.interface_key
and m.letter_type_id = lt.letter_type_id)
and not exists (select 1
from template_letter_merge_fields m2
where m2.pretty_name = i.pretty_name
and m2.letter_type_id = lt.letter_type_id)