Serialize origin stmt in Rollup Job and MV Meta #3705
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In materialized view 2.0, the define expr is serialized in column.
The method is that doris serialzie the origin stmt of Create Materialzied View Stmt in RollupJobV2 and MVMeta.
The define expr will be extract from the origin stmt after meta is deserialized.
The define expr is necessary for bitmap and hll materialized view.
For example:
MV meta: __doris_mv_bitmap_k1, bitmap_union, to_bitmap(k1)
Origin stmt: select bitmap_union(to_bitmap(k1)) from table
Deserialize meta: __doris_mv_bitmap_k1, bitmap_union, null
After extract: the define expr `to_bitmap(k1)` from origin stmt should be extracted.
__doris_mv_bitmap_v1, bitmap_union, to_bitmap(k1) (which comes from the origin stmt)
Change-Id: Ic2da093188d8985f5e97be5bd094e5d60d82c9a7
EmmyMiao87
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kind/improvement
area/materialized-view
imay
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May 28, 2020
HangyuanLiu
reviewed
May 28, 2020
| @SerializedName(value = "keysType") | ||
| private KeysType keysType; | ||
| @SerializedName(value = "defineStmt") | ||
| private OriginStatement defineStmt; |
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The name defineStmt can easily cause ambiguity with DefineExpr. But this statement may not only parse the semantics of defineExpr in the future。MaterializedViewStmt is a better name ?
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The define stmt means that this is the definition of materialized views.
Change-Id: I4e1e0f4ad0f6e76cdc43e49938de768ec3b0a0e8
morningman
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May 28, 2020
fe/src/main/java/org/apache/doris/analysis/CreateMaterializedViewStmt.java
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Change-Id: I3ab23f5c94ae781167f498fefde2d96e42e05bf9
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BiteTheDDDDt
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Feb 7, 2025
…pool for metadata fetching (apache#44907) (apache#3705) pick [apache#44907](apache#44907) In production, we encountered an issue where the librdkafka consumer stucked during destruction, causing the heavy work pool to become saturated, which in turn made all heavy work pool-dependent functionalities, such as querying, unusable. To mitigate this impact, we replaced the heavy work pool with routine load threads for metadata fetching.
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In materialized view 2.0, the define expr is serialized in column.
The method is that doris serialzie the origin stmt of Create Materialzied View Stmt in RollupJobV2 and MVMeta.
The define expr will be extract from the origin stmt after meta is deserialized.
The define expr is necessary for bitmap and hll materialized view.
For example:
MV meta: __doris_mv_bitmap_k1, bitmap_union, to_bitmap(k1)
Origin stmt: select bitmap_union(to_bitmap(k1)) from table
Deserialize meta: __doris_mv_bitmap_k1, bitmap_union, null
After extract: the define expr
to_bitmap(k1)from origin stmt should be extracted.__doris_mv_bitmap_v1, bitmap_union, to_bitmap(k1) (which comes from the origin stmt)
#3344
Change-Id: Ic2da093188d8985f5e97be5bd094e5d60d82c9a7