8096753367
When the materialized view is not enough to provide all the data for the query, if the materialized view is increment update by partition. we can union materialized view and origin query to reponse the query. this depends on https://github.com/apache/doris/pull/33362 such as materialized view def is as following: > CREATE MATERIALIZED VIEW mv_10086 > BUILD IMMEDIATE REFRESH AUTO ON MANUAL > partition by(l_shipdate) > DISTRIBUTED BY RANDOM BUCKETS 2 > PROPERTIES ('replication_num' = '1') > AS > select l_shipdate, o_orderdate, l_partkey, l_suppkey, sum(o_totalprice) as sum_total > from lineitem > left join orders on lineitem.l_orderkey = orders.o_orderkey and l_shipdate = o_orderdate > group by > l_shipdate, > o_orderdate, > l_partkey, > l_suppkey; the materialized view data is as following: +------------+-------------+-----------+-----------+-----------+ | l_shipdate | o_orderdate | l_partkey | l_suppkey | sum_total | +------------+-------------+-----------+-----------+-----------+ | 2023-10-18 | 2023-10-18 | 2 | 3 | 109.20 | | 2023-10-17 | 2023-10-17 | 2 | 3 | 99.50 | | 2023-10-19 | 2023-10-19 | 2 | 3 | 99.50 | +------------+-------------+-----------+-----------+-----------+ when we insert data to partition `2023-10-17`, if we run query as following ``` select l_shipdate, o_orderdate, l_partkey, l_suppkey, sum(o_totalprice) as sum_total from lineitem left join orders on lineitem.l_orderkey = orders.o_orderkey and l_shipdate = o_orderdate group by l_shipdate, o_orderdate, l_partkey, l_suppkey; ``` query rewrite by materialzied view will fail with message `Check partition query used validation fail` if we turn on the switch `SET enable_materialized_view_union_rewrite = true;` default true we run the query above again, it will success and will use union all materialized view and origin query to response the query correctly. the plan is as following: ``` | Explain String(Nereids Planner) | +----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | PLAN FRAGMENT 0 | | OUTPUT EXPRS: | | l_shipdate[#52] | | o_orderdate[#53] | | l_partkey[#54] | | l_suppkey[#55] | | sum_total[#56] | | PARTITION: UNPARTITIONED | | | | HAS_COLO_PLAN_NODE: false | | | | VRESULT SINK | | MYSQL_PROTOCAL | | | | 11:VEXCHANGE | | offset: 0 | | distribute expr lists: | | | | PLAN FRAGMENT 1 | | | | PARTITION: HASH_PARTITIONED: l_shipdate[#42], o_orderdate[#43], l_partkey[#44], l_suppkey[#45] | | | | HAS_COLO_PLAN_NODE: false | | | | STREAM DATA SINK | | EXCHANGE ID: 11 | | UNPARTITIONED | | | | 10:VUNION(756) | | | | | |----9:VAGGREGATE (merge finalize)(753) | | | | output: sum(partial_sum(o_totalprice)[#46])[#51] | | | | group by: l_shipdate[#42], o_orderdate[#43], l_partkey[#44], l_suppkey[#45] | | | | cardinality=2 | | | | distribute expr lists: l_shipdate[#42], o_orderdate[#43], l_partkey[#44], l_suppkey[#45] | | | | | | | 8:VEXCHANGE | | | offset: 0 | | | distribute expr lists: l_shipdate[#42] | | | | | 1:VEXCHANGE | | offset: 0 | | distribute expr lists: | | | | PLAN FRAGMENT 2 | | | | PARTITION: HASH_PARTITIONED: o_orderkey[#21], o_orderdate[#25] | | | | HAS_COLO_PLAN_NODE: false | | | | STREAM DATA SINK | | EXCHANGE ID: 08 | | HASH_PARTITIONED: l_shipdate[#42], o_orderdate[#43], l_partkey[#44], l_suppkey[#45] | | | | 7:VAGGREGATE (update serialize)(747) | | | STREAMING | | | output: partial_sum(o_totalprice[#41])[#46] | | | group by: l_shipdate[#37], o_orderdate[#38], l_partkey[#39], l_suppkey[#40] | | | cardinality=2 | | | distribute expr lists: l_shipdate[#37] | | | | | 6:VHASH JOIN(741) | | | join op: RIGHT OUTER JOIN(PARTITIONED)[] | | | equal join conjunct: (o_orderkey[#21] = l_orderkey[#5]) | | | equal join conjunct: (o_orderdate[#25] = l_shipdate[#15]) | | | runtime filters: RF000[min_max] <- l_orderkey[#5](2/2/2048), RF001[bloom] <- l_orderkey[#5](2/2/2048), RF002[min_max] <- l_shipdate[#15](1/1/2048), RF003[bloom] <- l_shipdate[#15](1/1/2048) | | | cardinality=2 | | | vec output tuple id: 4 | | | output tuple id: 4 | | | vIntermediate tuple ids: 3 | | | hash output slot ids: 6 7 24 25 15 | | | final projections: l_shipdate[#36], o_orderdate[#32], l_partkey[#34], l_suppkey[#35], o_totalprice[#31] | | | final project output tuple id: 4 | | | distribute expr lists: o_orderkey[#21], o_orderdate[#25] | | | distribute expr lists: l_orderkey[#5], l_shipdate[#15] | | | | | |----3:VEXCHANGE | | | offset: 0 | | | distribute expr lists: l_orderkey[#5] | | | | | 5:VEXCHANGE | | offset: 0 | | distribute expr lists: | | | | PLAN FRAGMENT 3 | | | | PARTITION: RANDOM | | | | HAS_COLO_PLAN_NODE: false | | | | STREAM DATA SINK | | EXCHANGE ID: 05 | | HASH_PARTITIONED: o_orderkey[#21], o_orderdate[#25] | | | | 4:VOlapScanNode(722) | | TABLE: union_db.orders(orders), PREAGGREGATION: ON | | runtime filters: RF000[min_max] -> o_orderkey[#21], RF001[bloom] -> o_orderkey[#21], RF002[min_max] -> o_orderdate[#25], RF003[bloom] -> o_orderdate[#25] | | partitions=3/3 (p_20231017,p_20231018,p_20231019), tablets=9/9, tabletList=161188,161190,161192 ... | | cardinality=3, avgRowSize=0.0, numNodes=1 | | pushAggOp=NONE | | | | PLAN FRAGMENT 4 | | | | PARTITION: HASH_PARTITIONED: l_orderkey[#5] | | | | HAS_COLO_PLAN_NODE: false | | | | STREAM DATA SINK | | EXCHANGE ID: 03 | | HASH_PARTITIONED: l_orderkey[#5], l_shipdate[#15] | | | | 2:VOlapScanNode(729) | | TABLE: union_db.lineitem(lineitem), PREAGGREGATION: ON | | PREDICATES: (l_shipdate[#15] >= '2023-10-17') AND (l_shipdate[#15] < '2023-10-18') | | partitions=1/3 (p_20231017), tablets=3/3, tabletList=161223,161225,161227 | | cardinality=2, avgRowSize=0.0, numNodes=1 | | pushAggOp=NONE | | | | PLAN FRAGMENT 5 | | | | PARTITION: RANDOM | | | | HAS_COLO_PLAN_NODE: false | | | | STREAM DATA SINK | | EXCHANGE ID: 01 | | RANDOM | | | | 0:VOlapScanNode(718) | | TABLE: union_db.mv_10086(mv_10086), PREAGGREGATION: ON | | partitions=2/3 (p_20231018_20231019,p_20231019_20231020), tablets=4/4, tabletList=161251,161253,161265 ... | | cardinality=2, avgRowSize=0.0, numNodes=1 | | pushAggOp=NONE | | | | MaterializedView | | MaterializedViewRewriteSuccessAndChose: | | Names: mv_10086 | | MaterializedViewRewriteSuccessButNotChose: | | | | MaterializedViewRewriteFail: | +----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ ```
新加case注意事项
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变量名前要写 def，否则是全局变量，并行跑的 case 的时候可能被其他 case 影响。
Problematic code:
ret = ***Correct code:
def ret = *** -
尽量不要在 case 中 global 的设置 session variable，或者修改集群配置，可能会影响其他 case。
Problematic code:
sql """set global enable_pipeline_x_engine=true;"""Correct code:
sql """set enable_pipeline_x_engine=true;""" -
如果必须要设置 global，或者要改集群配置，可以指定 case 以 nonConcurrent 的方式运行。
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case 中涉及时间相关的，最好固定时间，不要用类似 now() 函数这种动态值，避免过一段时间后 case 就跑不过了。
Problematic code:
sql """select count(*) from table where created < now();"""Correct code:
sql """select count(*) from table where created < '2023-11-13';""" -
case 中 streamload 后请加上 sync 一下，避免在多 FE 环境中执行不稳定。
Problematic code:
streamLoad { ... } sql """select count(*) from table """Correct code:
streamLoad { ... } sql """sync""" sql """select count(*) from table """