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https://issues.apache.org/jira/browse/HIVE-10350?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Mostafa Mokhtar updated HIVE-10350:
-----------------------------------
Summary: CBO: Use total size instead of bucket count to determine number of
splits & parallelism (was: CBO: With hive.cbo.costmodel.extended enabled IO
cost is negative)
> CBO: Use total size instead of bucket count to determine number of splits &
> parallelism
> ----------------------------------------------------------------------------------------
>
> Key: HIVE-10350
> URL: https://issues.apache.org/jira/browse/HIVE-10350
> Project: Hive
> Issue Type: Sub-task
> Components: CBO
> Affects Versions: 1.2.0
> Reporter: Mostafa Mokhtar
> Assignee: Mostafa Mokhtar
> Fix For: 1.2.0
>
> Attachments: HIVE-10331.01.patch
>
>
> Not an overflow but parallelism ends up being -1 as it uses number of buckets
> {code}
> final int parallelism = RelMetadataQuery.splitCount(join) == null
> ? 1 : RelMetadataQuery.splitCount(join);
> {code}
> {code}
> 2015-04-13 18:19:09,154 DEBUG [main]: cost.HiveCostModel
> (HiveCostModel.java:getJoinCost(62)) - COMMON_JOIN cost: {1600892.857142857
> rows, 2.4463782008994658E7 cpu, 8.54445445875E10 io}
> 2015-04-13 18:19:09,155 DEBUG [main]: cost.HiveCostModel
> (HiveCostModel.java:getJoinCost(62)) - MAP_JOIN cost: {1600892.857142857
> rows, 1601785.714285714 cpu, -1698787.4999999998 io}
> 2015-04-13 18:19:09,155 DEBUG [main]: cost.HiveCostModel
> (HiveCostModel.java:getJoinCost(72)) - MAP_JOIN selected
> 2015-04-13 18:19:09,157 DEBUG [main]: parse.CalcitePlanner
> (CalcitePlanner.java:apply(862)) - Plan After Join Reordering:
> HiveSort(fetch=[100]): rowcount = 6006.726049749041, cumulative cost =
> {1.1468867492063493E8 rows, 1.166177684126984E8 cpu, -1.1757664816220238E9
> io}, id = 3000
> HiveSort(sort0=[$0], dir0=[ASC]): rowcount = 6006.726049749041, cumulative
> cost = {1.1468867492063493E8 rows, 1.166177684126984E8 cpu,
> -1.1757664816220238E9 io}, id = 2998
> HiveProject(customer_id=[$4], customername=[concat($9, ', ', $8)]):
> rowcount = 6006.726049749041, cumulative cost = {1.1468867492063493E8 rows,
> 1.166177684126984E8 cpu, -1.1757664816220238E9 io}, id = 3136
> HiveJoin(condition=[=($1, $5)], joinType=[inner],
> joinAlgorithm=[map_join], cost=[{5.557820341269841E7 rows,
> 5.557840182539682E7 cpu, -4299694.122023809 io}]): rowcount =
> 6006.726049749041, cumulative cost = {1.1468867492063493E8 rows,
> 1.166177684126984E8 cpu, -1.1757664816220238E9 io}, id = 3132
> HiveJoin(condition=[=($0, $1)], joinType=[inner],
> joinAlgorithm=[map_join], cost=[{5.7498805E7 rows, 5.9419605E7 cpu,
> -1.15248E9 io}]): rowcount = 5.5578005E7, cumulative cost = {5.7498805E7
> rows, 5.9419605E7 cpu, -1.15248E9 io}, id = 3100
> HiveProject(sr_cdemo_sk=[$4]): rowcount = 5.5578005E7, cumulative
> cost = {0.0 rows, 0.0 cpu, 0.0 io}, id = 2992
> HiveTableScan(table=[[tpcds_bin_orc_200.store_returns]]):
> rowcount = 5.5578005E7, cumulative cost = {0}, id = 2878
> HiveProject(cd_demo_sk=[$0]): rowcount = 1920800.0, cumulative cost
> = {0.0 rows, 0.0 cpu, 0.0 io}, id = 2978
> HiveTableScan(table=[[tpcds_bin_orc_200.customer_demographics]]):
> rowcount = 1920800.0, cumulative cost = {0}, id = 2868
> HiveJoin(condition=[=($10, $1)], joinType=[inner],
> joinAlgorithm=[map_join], cost=[{1787.9365079365077 rows, 1790.15873015873
> cpu, -8000.0 io}]): rowcount = 198.4126984126984, cumulative cost =
> {1611666.507936508 rows, 1619761.5873015872 cpu, -1.89867875E7 io}, id = 3130
> HiveJoin(condition=[=($0, $4)], joinType=[inner],
> joinAlgorithm=[map_join], cost=[{8985.714285714286 rows, 16185.714285714286
> cpu, -1.728E7 io}]): rowcount = 1785.7142857142856, cumulative cost =
> {1609878.5714285714 rows, 1617971.4285714284 cpu, -1.89787875E7 io}, id = 3128
> HiveProject(hd_demo_sk=[$0], hd_income_band_sk=[$1]): rowcount =
> 7200.0, cumulative cost = {0.0 rows, 0.0 cpu, 0.0 io}, id = 2982
>
> HiveTableScan(table=[[tpcds_bin_orc_200.household_demographics]]): rowcount =
> 7200.0, cumulative cost = {0}, id = 2871
> HiveJoin(condition=[=($3, $6)], joinType=[inner],
> joinAlgorithm=[map_join], cost=[{1600892.857142857 rows, 1601785.714285714
> cpu, -1698787.4999999998 io}]): rowcount = 1785.7142857142856, cumulative
> cost = {1600892.857142857 rows, 1601785.714285714 cpu, -1698787.4999999998
> io}, id = 3105
> HiveProject(c_customer_id=[$1], c_current_cdemo_sk=[$2],
> c_current_hdemo_sk=[$3], c_current_addr_sk=[$4], c_first_name=[$8],
> c_last_name=[$9]): rowcount = 1600000.0, cumulative cost = {0.0 rows, 0.0
> cpu, 0.0 io}, id = 2970
> HiveTableScan(table=[[tpcds_bin_orc_200.customer]]): rowcount
> = 1600000.0, cumulative cost = {0}, id = 2862
> HiveProject(ca_address_sk=[$0], ca_city=[$6]): rowcount =
> 892.8571428571428, cumulative cost = {0.0 rows, 0.0 cpu, 0.0 io}, id = 2974
> HiveFilter(condition=[=($6, 'Hopewell')]): rowcount =
> 892.8571428571428, cumulative cost = {0.0 rows, 0.0 cpu, 0.0 io}, id = 2972
>
> HiveTableScan(table=[[tpcds_bin_orc_200.customer_address]]): rowcount =
> 800000.0, cumulative cost = {0}, id = 2864
> HiveProject(ib_income_band_sk=[$0], ib_lower_bound=[$1],
> ib_upper_bound=[$2]): rowcount = 2.2222222222222223, cumulative cost = {0.0
> rows, 0.0 cpu, 0.0 io}, id = 2988
> HiveFilter(condition=[AND(>=($1, 32287), <=($2, +(32287,
> 50000)))]): rowcount = 2.2222222222222223, cumulative cost = {0.0 rows, 0.0
> cpu, 0.0 io}, id = 2986
> HiveTableScan(table=[[tpcds_bin_orc_200.income_band]]):
> rowcount = 20.0, cumulative cost = {0}, id = 2874
> {code}
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