branch-3.1: [Enhancement](iceberg) add iceberg expire cache params in catalog property #57187 #59176
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…perty (#57187) ### What problem does this PR solve? Issue Number: #57228 Related PR: #xxx Problem Summary: there are some problems: 1. when insert new data into iceberg,doris can not retrieve new data untill the table meta cache is refreshed. 2. when alter iceberg table's schema, doris can not detect schema changes until both the table meta cache and the snapshot meta cache are refreshed. if we add a new column and insert data into this column using Spark, doris can not detect this column and new data until both the table meta cache and the snapshot meta cache are refreshed. 3. both the table meta cache and the snapshot meta cache are 10 minutes, it's too long. we can add two params in catalog properties: **iceberg.table.meta.cache.ttl-second** and **iceberg.snapshot.meta.cache.ttl-second** these params can control the expire of iceberg table meta cache and snapshot meta cache, 1. Regarding the "iceberg.table.meta.cache.ttl-second" parameter，we can create a iceberg catalog like this: CREATE CATALOG iceberg PROPERTIES ( "type" = "iceberg", "iceberg.catalog.type" = "hms", "hive.metastore.uris" = "thrift://localhost:9083", **"iceberg.table.meta.cache.ttl-second" = "0"** ); when we set "iceberg.table.meta.cache.ttl-second" = "0", Doris can retrieve the latest data immediately without using the cache. Alternatively, we can set the "iceberg.table.meta.cache.ttl-second" parameter to a smaller value, thus reducing the cache interval. 2.Regarding the "iceberg.snapshot.meta.cache.ttl-second" parameter， we can create a iceberg catalog like this: CREATE CATALOG iceberg PROPERTIES ( "type" = "iceberg", "iceberg.catalog.type" = "hms", "hive.metastore.uris" = "thrift://localhost:9083", **"iceberg.table.meta.cache.ttl-second" = "0",** **"iceberg.snapshot.meta.cache.ttl-second" = "0"** ); when we set "iceberg.table.meta.cache.ttl-second" = "0" and "iceberg.snapshot.meta.cache.ttl-second"="0", doris can immediately detect schema changes(use desc or select ...), if we add a new column and insert data into this column using Spark, doris can detect this column and new data immediately. Co-authored-by: yaoxiao <yaoxiao@fosun.com>
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Thank you for your contribution to Apache Doris. Please clearly describe your PR:
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run buildall |
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compile failed |
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Cherry-picked from #57187