这是一个小发现.(测试环境:SQL Server 9.0.3024,SQL Server 10.50.1600)
当使用执行EXECUTE语句时,若不使用括号'()’包含需要执行的字符串,将会抛出如下错误:
不包含括号exec 'select name,
object_id,
principal_id,
schema_id,
parent_object_id,
type,
type_desc,
create_date,
modify_date,
is_ms_shipped,
is_published,
is_schema_published,
lob_data_space_id,
filestream_data_space_id,
max_column_id_used,
lock_on_bulk_load,
uses_ansi_nulls,
is_replicated,
has_replication_filter,
is_merge_published,
is_sync_tran_subscribed,
has_unchecked_assembly_data,
text_in_row_limit,
large_value_types_out_of_row,
is_tracked_by_cdc,
lock_escalation,
lock_escalation_desc
from sys.tables'
| Msg 102, Level 15, State 1, Line 1
Incorrect syntax near 'select name,
object_id,
principal_id,
schema_id,
parent_object_id,
type,
type_desc,
create_date,
modify_d'. |
字符串被截断了.
将代码改为如下内容:
包含括号exec ('select name,
object_id,
principal_id,
schema_id,
parent_object_id,
type,
type_desc,
create_date,
modify_date,
is_ms_shipped,
is_published,
is_schema_published,
lob_data_space_id,
filestream_data_space_id,
max_column_id_used,
lock_on_bulk_load,
uses_ansi_nulls,
is_replicated,
has_replication_filter,
is_merge_published,
is_sync_tran_subscribed,
has_unchecked_assembly_data,
text_in_row_limit,
large_value_types_out_of_row,
is_tracked_by_cdc,
lock_escalation,
lock_escalation_desc
from sys.tables')
OK,一切正常!
测试了一下,若exec不使用括号包含执行语句.只能使用128个字符长度的动态语句.
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