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gbase数据、南大通用产品文档:GBase8aLOCALTIMESTAMP,LOCALTIMESTAMP()

更新日期:2024年09月11日

函数说明
LOCALTIMESTAMP 和LOCALTIMESTAMP()等同于NOW()。
示例
示例1:使用LOCALTIMESTAMP 函数,返回当前时间戳。
gbase> SELECT LOCALTIMESTAMP FROM dual;
+---------------------+
| LOCALTIMESTAMP
|
+---------------------+
| 2020-04-01 18:22:59 |
+---------------------+
1 row in set
示例2:使用LOCALTIMESTAMP()函数,返回当前时间戳。
gbase> SELECT LOCALTIMESTAMP() FROM dual;
+---------------------+
| LOCALTIMESTAMP()
|
+---------------------+
| 2020-04-01 18:23:13 |
+---------------------+
1 row in set
示例3:使用NOW()函数,返回当前“日期+时间”。
gbase> SELECT NOW() FROM dual;
+---------------------+
| NOW()
|
+---------------------+
| 2020-04-01 18:23:32 |
+---------------------+
1 row in set

GBase 8a MPP Cluster 产品手册
5 数据库管理指南
文档版本953(2022-04-10)
南大通用数据技术股份有限公司
801

步骤1 创建资源消费组并关联用户
create consumer group group_process
comment = 'users for process';
create consumer group group_select
comment = 'users for select';
create consumer group group_check
comment = 'users for check';
alter consumer group group_check
add user usercheck;
alter consumer group group_process
add user usera;
alter consumer group group_process
add user userb;
alter consumer group group_select
add user userc;
alter consumer group group_select
add user userd;
alter consumer group group_select
add user usere;
步骤2 创建资源池
create resource pool static_pool0(
cpu_percent=100,
max_memory=10000,
max_temp_diskspace= 10000,
max_disk_space= 10000,
max_disk_writeio=1000,
max_disk_readio=1000) TYPE static;
create resource pool pool_check(
priority=1,
cpu_percent=99,
max_memory=4000,
max_temp_diskspace=50000,
max_disk_space=50000,
max_disk_writeio=600,
max_disk_readio=600,
max_activetask=200,
task_max_parallel_degree=100,
task_waiting_timeout=100000,

GBase 8a MPP Cluster 产品手册
4 管理员指南
文档版本953(2022-09-15)
南大通用数据技术股份有限公司
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task_running_timeout=100000)
type dynamic base on static_pool0;
create resource pool pool_select(
priority=3,
cpu_percent=70,
max_memory=4000,
max_temp_diskspace=5000,
max_disk_space=5000,
max_disk_writeio=200,
max_disk_readio=200,
max_activetask=200,
task_max_parallel_degree=100,
task_waiting_timeout=100000,
task_running_timeout=100000)
type dynamic base on static_pool0;
create resource pool pool_process(
priority=3,
cpu_percent=30,
max_memory=2000,
max_temp_diskspace=5000,
max_disk_space=5000,
max_disk_writeio=200,
max_disk_readio=200,
max_activetask=200,
task_max_parallel_degree=100,
task_waiting_timeout=100000,
task_running_timeout=100000)
type dynamic base on static_pool0;
步骤3 创建资源计划
create resource plan
resource_plan
comment = 'resource plan';
步骤4 创建资源指令计划
create resource directive directive1

GBase 8a MPP Cluster 产品手册
4 管理员指南
文档版本953(2022-09-15)
南大通用数据技术股份有限公司
514
(plan_name = 'resource_plan',
pool_name = 'pool_select',
group_name = 'group_select',
comment = 'select user resource usage ');
create resource directive directive2
(plan_name = 'resource_plan',
pool_name = 'pool_process',
group_name = 'group_process',
comment = 'process user resource usage ');
create resource directive directive3
(plan_name = 'resource_plan',,
pool_name = 'pool_check',
group_name = 'group_check',
comment ='check user resource usage ');
create resource directive directive4
(plan_name = 'resource_plan',
pool_name = ' pool_process ',
group_name = 'default_consumer_group',
comment = 'other user resource usage ');
步骤5 激活计划
active resource plan resource_plan on vc vc1;

当前,
仅支持从V8.6.X.X 版本升级到V9.5.2.X 版本。
V8.6.X.X 版本升级到V9.5.3.X
版本需先由V8.6.X.X 版本升级到V9.5.2.X 版本后,
再进行V9.5.X.X 间版本升级至
V9.5.3.X。

GBase 8a MPP Cluster 产品手册
3 集群安装升级与卸载
文档版本953(2022-09-15)
南大通用数据技术股份有限公司
111