MS Sql Server EXECUTE

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:

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:

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.

exec