rows-rows文档介绍内容-阿里云

Affected rows行为

本文主要描述了 PolarDB-X 中的affected rows行为。注意事项 PolarDB-X 从5.4.17-16921956版本开始对DML在useAffectedRows=true情况下的affected rows进行兼容性适配。PolarDB-X 分布式场景下，逻辑DML执行较为复杂，affected rows行为和...

Quick BI数据集加速同步提示rows number over the ...

问题描述 Quick BI数据集加速同步提示rows number over the limit。问题原因高级版用户单表限制抽取100万条，抽取的数据条数超过了限制。解决方案取消直接抽取明细，针对业务场景展示需要将明细数据进行汇总后在抽取。适用于 Quick BI ...

Quick BI数据集引擎加速报错“rows number over the ...

问题描述 Quick BI数据集引擎加速报错“rows number over the limit|limit:10,000,000”。问题原因抽取上限是1000万行，而本次抽取，将会达到16,236,221 行，超出上限报错。解决方案勾选按日期加速，选择抽取天数约束一下抽取上限，维持...

使用SQL查询数据时报错The sql scanned rows of main ...

问题现象使用SQL查询数据时出现如下报错：[Message]:The sql scanned rows of main table exceeds the quota,main table rows quota is 100000 可能原因如果使用SQL查询数据时使用的条件为非分区键，则会造成全表扫描数据，可能会出现...

执行计划 QUERY PLAN Hash Join(cost=0.00.10.00 rows=1 width=4)Hash Cond:(t1.a=t2.a)->Gather(cost=0.00.5.00 rows=1 width=4)->Local Gather(cost=0.00.5.00 rows=1 width=4)->Seq Scan on t1(cost=0.00.5.00 rows=1 width=4)->Hash...

通过EXPLAIN和EXPLAIN ANALYZE分析执行计划

per task:avg.:32.00 std.dev.:0.00 Output layout:[count]Output partitioning:SINGLE[]Aggregate(FINAL)│Outputs:[count:bigint]│Estimates:{rows:1(8B)}│Output:2 rows(18B),PeakMemory:24B(0.00%),WallTime:70.39us(0.03%)│count:=...

dbms_sql.reset_trace_stats

0 MIN_EXEC_TIME:0 MAX_EXEC_TIME:0 SUM_ROWS_SENT:0 MIN_ROWS_SENT:0 MAX_ROWS_SENT:0 SUM_ROWS_EXAMINED:0 MIN_ROWS_EXAMINED:0 MAX_ROWS_EXAMINED:0 SUM_ROWS_AFFECTED:0 MIN_ROWS_AFFECTED:0 MAX_ROWS_AFFECTED:0 SUM_LOGICAL_READ:0 ...

Joining Relations Hints

QUERY PLAN-Hash Join(cost=21.45.81463.06 rows=2014215 width=12)Hash Cond:(a.bid=b.bid)->Seq Scan on pgbench_accounts a(cost=0.00.53746.15 rows=2014215 width=12)->Hash(cost=21.20.21.20 rows=20 width=4)->Seq Scan on pgbench_...

Joining Relations Hints

QUERY PLAN-Hash Join(cost=21.45.81463.06 rows=2014215 width=12)Hash Cond:(a.bid=b.bid)->Seq Scan on pgbench_accounts a(cost=0.00.53746.15 rows=2014215 width=12)->Hash(cost=21.20.21.20 rows=20 width=4)->Seq Scan on pgbench_...

Global Hints

QUERY PLAN-Hash Join(cost=1.32.2.64 rows=13 width=22)Hash Cond:(a.mgr=emp.empno)->Seq Scan on emp a(cost=0.00.1.14 rows=14 width=16)->Hash(cost=1.14.1.14 rows=14 width=11)->Seq Scan on emp(cost=0.00.1.14 rows=14 width=11)...

执行计划调优

举例分析 Update(cost=0.00.1274.11 rows=1 width=1)(actual time=995096.707.1517097.191 rows=245136 loops=1)Executor Memory:1kB Segments:96 Max:1kB(segment 0)->Partition Selector for t2(cost=0.00.1274.04 rows=1 width=842)...

Global Hints

QUERY PLAN-Hash Join(cost=1.32.2.64 rows=13 width=22)Hash Cond:(a.mgr=emp.empno)->Seq Scan on emp a(cost=0.00.1.14 rows=14 width=16)->Hash(cost=1.14.1.14 rows=14 width=11)->Seq Scan on emp(cost=0.00.1.14 rows=14 width=11)...

全匹配查询

name,index_name,SearchQuery(query,next_token=next_token,limit=100,get_total_count=True),columns_to_get=ColumnsToGet(['k','t','g','ka','la'],ColumnReturnType.SPECIFIED))all_rows.extend(search_response.rows)first_page=False ...

使用EXPLAIN查看并行计划

nodes:16)(cost=103382.56 rows=1029632)->Nested loop inner join(cost=409.36 rows=4022)->Filter:(nation.N_NAME='IRAN')(cost=2.29 rows=3)->Table scan on nation(cost=2.29 rows=25)->Parallel index lookup on supplier using ...

分区连接

a.date->Append(cost=0.00.71.20 rows=2080 width=40)->Seq Scan on sales_y2023q1 a(cost=0.00.15.20 rows=520 width=40)->Seq Scan on sales_y2023q2 a_1(cost=0.00.15.20 rows=520 width=40)->Seq Scan on sales_y2023q3 a_2(cost=0.00....

分区连接

a.date->Append(cost=0.00.71.20 rows=2080 width=40)->Seq Scan on sales_y2023q1 a(cost=0.00.15.20 rows=520 width=40)->Seq Scan on sales_y2023q2 a_1(cost=0.00.15.20 rows=520 width=40)->Seq Scan on sales_y2023q3 a_2(cost=0.00....

dbms_sql.add_trace

TIME:925 MIN_EXEC_TIME:438 MAX_EXEC_TIME:487 SUM_ROWS_SENT:106 MIN_ROWS_SENT:8 MAX_ROWS_SENT:98 SUM_ROWS_EXAMINED:108 MIN_ROWS_EXAMINED:8 MAX_ROWS_EXAMINED:100 SUM_ROWS_AFFECTED:0 MIN_ROWS_AFFECTED:0 MAX_ROWS_AFFECTED:0 ...

DescribeIMVInfos-查询实时物化视图详情

outerjoin_calc_rows\":null,\"avg_outerjoin_calc_time\":null,\"avg_outerjoin_delta_rows\":null,\"min_outerjoin_apply_time\":null,\"min_outerjoin_calc_rows\":null,\"min_outerjoin_calc_time\":null,\"min_outerjoin_delta_rows\...

计划加速

hash_sys0103 a_1(cost=0.00.19.59 rows=959 width=4)(actual time=0.001.0.001 rows=0 loops=1)->Parallel Seq Scan on part_hash_sys0104 a_2(cost=0.00.19.59 rows=959 width=4)(actual time=0.001.0.001 rows=0 loops=1).->Sort(cost=...

计划加速

hash_sys0103 a_1(cost=0.00.19.59 rows=959 width=4)(actual time=0.001.0.001 rows=0 loops=1)->Parallel Seq Scan on part_hash_sys0104 a_2(cost=0.00.19.59 rows=959 width=4)(actual time=0.001.0.001 rows=0 loops=1).->Sort(cost=...

分区裁剪

segments:3)(cost=0.00.431.00 rows=1 width=4)(actual time=1.047.1.196 rows=3 loops=1)->Aggregate(cost=0.00.431.00 rows=1 width=4)(actual time=0.012.0.012 rows=1 loops=1)->Seq Scan on t1(cost=0.00.431.00 rows=1 width=4)...

Table

} Rows ActiveDocument.Tables.Item(Index).Rows 获取指定表格的所有行。重要 JS-SDK V1.1.10及以上版本支持此功能。仅PC端支持此功能。语法表达式.ActiveDocument.Tables.Item(Index).Rows 表达式：文档类型应用对象示例 async function...

物化视图

word-cater caterpillar Caterpillar caterpillars caterpillar's Caterpillar's caterer caterer's caters catered(10 rows)Limit(cost=11583.61.11583.64 rows=10 width=32)(actual time=1431.591.1431.594 rows=10 loops=1)->Sort(cost=...

列组统计信息

segments:3)(cost=137814.33.154481.00 rows=1000000 width=20)(actual time=3986.143.4014.601 rows=100001 loops=1)->HashAggregate(cost=137814.33.141147.67 rows=333333 width=20)(actual time=3977.037.4002.222 rows=33661 loops=1)...

Left join优化改写为Right join

}│Output:96 rows(864B),PeakMemory:96B(0.00%),WallTime:88.21ms(0.88%)│count_2:=count(*)└─LEFT Join[(`n_nationkey`=`c_nationkey`)][$hashvalue,$hashvalue_0_4]│Outputs:[]│Estimates:{rows:15000000(0B)}│Output:30000000 ...

利用JIT加速计算

segments:3)(cost=453326.83.453326.88 rows=3 width=32)(actual time=13064.601.13444.006 rows=3 loops=1)->Partial Aggregate(cost=453326.83.453326.84 rows=1 width=32)(actual time=13443.451.13443.452 rows=1 loops=1)->Seq Scan ...

分区剪枝

QUERY PLAN-Append(cost=0.01.136.35 rows=2268 width=20)(actual time=0.067.0.068 rows=0 loops=1)InitPlan 1(returns$0)->Result(cost=0.00.0.01 rows=1 width=8)(actual time=0.051.0.053 rows=1 loops=1)->Seq Scan on measurement_y...

根据表大小或代价控制是否使用ePQ

QUERY PLAN-Finalize Aggregate(cost=97621.42.97621.43 rows=1 width=8)->Gather(cost=97621.21.97621.42 rows=2 width=8)Workers Planned:2->Partial Aggregate(cost=96621.21.96621.22 rows=1 width=8)->Parallel Seq Scan on test(cost...

查询性能优化指导

segments:3)(cost=0.00.4.00 rows=100 width=8)Rows out:100 rows at destination with 2.728 ms to first row,2.838 ms to end,start offset by 0.418 ms.->Seq Scan on t(cost=0.00.4.00 rows=34 width=8)Rows out:Avg 33.3 rows x 3 ...

GetPartitionsHeatmap-获取分区热度信息

{"boundAxis":[{"bound":"A,B,C,D","labels":["L1","L2","L3","L4"],"rows":3171 },{"bound":"A,B,C,D","labels":["L1","L2","L3","L4"],"rows":277128 }],"dataMap":{"READ_WRITTEN_ROWS":[[0,0,0],[0,0,0]]},"timeAxis":[1671701056070,...

表格

} 插入行语法表达式.ActiveDocument.Tables.Item(Index).Rows.Add(BeforeRow)表达式：文档类型应用对象参数属性数据类型是否必填描述 BeforeRow String 是表示将会直接显示在新行右侧的Rows对象。示例 async function example(){ ...

通过Hint干预执行计划

segments:3)(cost=8.25.27.61 rows=11 width=16)->Hash Join(cost=8.25.27.61 rows=4 width=16)Hash Cond:(t2.val=t1.val)->Seq Scan on t2(cost=0.00.13.00 rows=334 width=8)->Hash(cost=8.22.8.22 rows=1 width=8)->Broadcast Motion 1:...

使用EXPLAIN

QUERY PLAN--Bitmap Heap Scan on tenk1(cost=25.08.60.21 rows=10 width=244)Recheck Cond:((unique1)AND(unique2>9000))->BitmapAnd(cost=25.08.25.08 rows=10 width=0)->Bitmap Index Scan on tenk1_unique1(cost=0.00.5.04 rows=101 ...

DescribeOasSQLPlans-查询 SQL 执行计划

range_rows:17,logical_range_rows:17,index_back_rows:0,output_rows:17,est_method:default_stat,avaiable_index_name[ALL_VIRTUAL_AGENT]\",\"Rows\":18}],\"Cost\":2013,\"ObjectName\":\"NULL\",\"Operator\":\"PHY_SORT\",\"Property...

分区表扫描算子

QUERY PLAN-Append(actual time=8.376.8.751 rows=0 loops=1)->Seq Scan on part_range_p0 part_range_1(actual time=0.035.0.036 rows=0 loops=1)->Seq Scan on part_range_p1 part_range_2(actual time=0.009.0.009 rows=0 loops=1)->Seq...

创建分区

ENGINE[=]engine_name][COMMENT[=]'string'][DATA DIRECTORY[=]'data_dir'][INDEX DIRECTORY[=]'index_dir'][MAX_ROWS[=]max_number_of_rows][MIN_ROWS[=]min_number_of_rows][TABLESPACE[=]tablespace_name][(subpartition_definition[,...

dbms_sql.reload_trace

0 MAX_EXEC_TIME:0 SUM_ROWS_SENT:0 MIN_ROWS_SENT:0 MAX_ROWS_SENT:0 SUM_ROWS_EXAMINED:0 MIN_ROWS_EXAMINED:0 MAX_ROWS_EXAMINED:0 SUM_ROWS_AFFECTED:0 MIN_ROWS_AFFECTED:0 MAX_ROWS_AFFECTED:0 SUM_LOGICAL_READ:0 MIN_LOGICAL_READ:...

TableInBatchWriteRowResponse

repeated RowInBatchWriteRowResponse put_rows=2;repeated RowInBatchWriteRowResponse update_rows=3;repeated RowInBatchWriteRowResponse delete_rows=4;} table_name:类型：string 描述：该表的表名。put_rows:类型：...

表结构说明

`MAX_ROWS_SENT` bigint(21)unsigned NOT NULL DEFAULT '0',`SUM_ROWS_EXAMINED` bigint(21)unsigned NOT NULL DEFAULT '0',`MIN_ROWS_EXAMINED` bigint(21)unsigned NOT NULL DEFAULT '0',`MAX_ROWS_EXAMINED` bigint(21)unsigned NOT ...

执行计划

segments:2)(cost=0.00.20.88 rows=1 width=13)Rows out:1 rows at destination with 0.305 ms to first row,0.537 ms to end,start offset by 0.289 ms.->Seq Scan on names(cost=0.00.20.88 rows=1 width=13)Rows out:Avg 1 rows x 2 ...

rows

新品推荐