set mem inaccessible-by-default作用 用于告诉 GDB是否拒绝访问未明确描述的内存。如果访问此类区域对特定目标有不良影响,或者提供更好的错误检查,这可能很有用。 如果指定 ,则使 GDB 将内存范围未明确描述的内存视为不存在,并拒绝访问此类内存。仅当定义了至少一个内存范围时,才会执行检查。如果指定,则使 GDB 将...
tables, indexes, sequences, etc. In Postgres, “public” is a Default schema. So, by default, Postgres users can access the "public" schema and create objects in it, such as views, tables, etc.
The USE db_name statement tells MySQL to use the db_name database as the default (current) database for subsequent statements. The database remains the default until the end of the session or another USE statement is issued. Example: USE db1; SELECT COUNT(*) FROM mytable; # selects fr...
The SET SCHEMA statement sets the default schema for a connection's session to the designated schema. The default schema is used as the target schema for all statements issued from the connection that do not explicitly specify a schema name. The target schema must exist for the SET SCHEMA sta...
DEFAULT SQL Server 的默认值为 OFF。 ON 数据库引擎在新查询计划导致性能回归的 Transact-SQL 查询中自动强制执行上一个已知完好的计划。 数据库引擎通过该强制计划持续监视 Transact-SQL 查询的查询性能。 如果性能提升,数据库引擎会继续使用上一个已知的良好计划。 如果未检测到性能提升,数据库引擎将生成新的查询...
(4, '"Text in double quotes"'); INSERT INTO dbo.Test VALUES (5, """Text in double quotes"""); INSERT INTO dbo.Test VALUES (6, "Text with 2 """ double quotes"); GO SET QUOTED_IDENTIFIER ON; GO -- Strings inside double quotation marks are now treated -- as object names, so...
Use SETPROJECT to view and set project properties,MaxCompute:After you create a MaxCompute project, you must go to the project to perform subsequent operations, such as development, analysis, and O&M.
default schema field is enabled only for user entities. As a result you cannot add a default schema to a group. So if any member of [domain]\TestGroup will try to create table without explicit schema pointed in a statement (like CREATE TABLE t1 (ID int)), (s)he will al...
set odps.task.quota.preference.tag = payasyougo 说明 该属性当前仅支持SQL作业。 tag_name为MaxCompute管家中配额组的配额组标签。配额组只能取作业所属项目空间Owner所在区域的配额组。tag_name只允许使用字母、数字和下划线(_)。 ALL 计量计费 Session odps.task.wlm.quota 用指定的资源去跑当前Session的任务,...
DEFAULT The CURRENT SCHEMA is set to its initial value. The initial value for SQL naming is USER. The initial value for system naming is *LIBL. Notes Considerations for keywords: There is a difference between specifying a single keyword (such as USER) as a single keyword or as a delimited...