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https://issues.apache.org/jira/browse/SPARK-15287?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Davies Liu closed SPARK-15287.
------------------------------
Resolution: Won't Fix
> Spark SQL partition filter clause with different literal type will scan all
> hive partitions
> -------------------------------------------------------------------------------------------
>
> Key: SPARK-15287
> URL: https://issues.apache.org/jira/browse/SPARK-15287
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 1.6.0, 1.6.1
> Reporter: Tao Li
>
> I have a hive table with a partition of string type. When the query with
> filter of string literal, it will call getPartitionsByFilter. But when the
> query with filter of integer literal, it will call getAllPartitions, which
> will cause a heavy query in hive metastore when the hive table with too many
> partitions.
> I find that, spark sql will cast the integer literal to double on logical
> plan (I don't know why spark sql will do this cast), spark sql will dynamic
> deceide to call getAllPartitions() or getPartitionsByFilter(). It seems that
> the method convertFilters() can't cover the double case.
> {code:java}
> def convertFilters(table: Table, filters: Seq[Expression]): String = {
> // hive varchar is treated as catalyst string, but hive varchar can't be
> pushed down.
> val varcharKeys = table.getPartitionKeys.asScala
> .filter(col => col.getType.startsWith(serdeConstants.VARCHAR_TYPE_NAME)
> ||
> col.getType.startsWith(serdeConstants.CHAR_TYPE_NAME))
> .map(col => col.getName).toSet
> filters.collect {
> case op @ BinaryComparison(a: Attribute, Literal(v, _: IntegralType)) =>
> s"${a.name} ${op.symbol} $v"
> case op @ BinaryComparison(Literal(v, _: IntegralType), a: Attribute) =>
> s"$v ${op.symbol} ${a.name}"
> case op @ BinaryComparison(a: Attribute, Literal(v, _: StringType))
> if !varcharKeys.contains(a.name) =>
> s"""${a.name} ${op.symbol} "$v""""
> case op @ BinaryComparison(Literal(v, _: StringType), a: Attribute)
> if !varcharKeys.contains(a.name) =>
> s""""$v" ${op.symbol} ${a.name}"""
> }.mkString(" and ")
> }
> override def getPartitionsByFilter(
> hive: Hive,
> table: Table,
> predicates: Seq[Expression]): Seq[Partition] = {
> // Hive getPartitionsByFilter() takes a string that represents partition
> // predicates like "str_key=\"value\" and int_key=1 ..."
> val filter = convertFilters(table, predicates)
> val partitions =
> if (filter.isEmpty) {
> getAllPartitionsMethod.invoke(hive,
> table).asInstanceOf[JSet[Partition]]
> } else {
> logDebug(s"Hive metastore filter is '$filter'.")
> getPartitionsByFilterMethod.invoke(hive, table,
> filter).asInstanceOf[JArrayList[Partition]]
> }
> partitions.asScala.toSeq
> }
> {code}
> The query plan with the string literal filter, and logdate is the parition of
> string type：
> {noformat}
> == Parsed Logical Plan ==
> Limit 21
> +- Limit 20
> +- Project
> [ip#1,field1#2,field2#3,field3#4,manualtime#5,timezone#6,pbstr#7,retcode#8,pagesize#9,refer#10,useragent#11,field4#12,responsetime#13,usid#14,style#15,unid#16,pl#17,usid_src#18,resinip#19,upstreamtime#20,uuid#21,qua#22,q_ext#23,line#24,logdate#0]
> +- Filter (logdate#0 = 201605050000)
> +- MetastoreRelation default, wap_nginx_5min, None
> == Analyzed Logical Plan ==
> ip: string, field1: string, field2: string, field3: string, manualtime:
> string, timezone: string, pbstr: map<string,string>, retcode: string,
> pagesize: string, refer: string, useragent: string, field4: string,
> responsetime: string, usid: string, style: string, unid: string, pl: string,
> usid_src: string, resinip: string, upstreamtime: string, uuid: string, qua:
> string, q_ext: string, line: string, logdate: string
> Limit 21
> +- Limit 20
> +- Project
> [ip#1,field1#2,field2#3,field3#4,manualtime#5,timezone#6,pbstr#7,retcode#8,pagesize#9,refer#10,useragent#11,field4#12,responsetime#13,usid#14,style#15,unid#16,pl#17,usid_src#18,resinip#19,upstreamtime#20,uuid#21,qua#22,q_ext#23,line#24,logdate#0]
> +- Filter (logdate#0 = 201605050000)
> +- MetastoreRelation default, wap_nginx_5min, None
> == Optimized Logical Plan ==
> Limit 20
> +- Filter (logdate#0 = 201605050000)
> +- MetastoreRelation default, wap_nginx_5min, None
> == Physical Plan ==
> Limit 20
> +- HiveTableScan
> [ip#1,field1#2,field2#3,field3#4,manualtime#5,timezone#6,pbstr#7,retcode#8,pagesize#9,refer#10,useragent#11,field4#12,responsetime#13,usid#14,style#15,unid#16,pl#17,usid_src#18,resinip#19,upstreamtime#20,uuid#21,qua#22,q_ext#23,line#24,logdate#0],
> MetastoreRelation default, wap_nginx_5min, None, [(logdate#0 = 201605050000)]
> {noformat}
> The query plan with the integer literal filter, which will do the double cast
> and call the inefficient getAllPartitions()：
> {noformat}
> == Parsed Logical Plan ==
> Limit 21
> +- Limit 20
> +- Project
> [ip#26,field1#27,field2#28,field3#29,manualtime#30,timezone#31,pbstr#32,retcode#33,pagesize#34,refer#35,useragent#36,field4#37,responsetime#38,usid#39,style#40,unid#41,pl#42,usid_src#43,resinip#44,upstreamtime#45,uuid#46,qua#47,q_ext#48,line#49,logdate#25]
> +- Filter (cast(logdate#25 as double) = cast(201605050000 as double))
> +- MetastoreRelation default, wap_nginx_5min, None
> == Analyzed Logical Plan ==
> ip: string, field1: string, field2: string, field3: string, manualtime:
> string, timezone: string, pbstr: map<string,string>, retcode: string,
> pagesize: string, refer: string, useragent: string, field4: string,
> responsetime: string, usid: string, style: string, unid: string, pl: string,
> usid_src: string, resinip: string, upstreamtime: string, uuid: string, qua:
> string, q_ext: string, line: string, logdate: string
> Limit 21
> +- Limit 20
> +- Project
> [ip#26,field1#27,field2#28,field3#29,manualtime#30,timezone#31,pbstr#32,retcode#33,pagesize#34,refer#35,useragent#36,field4#37,responsetime#38,usid#39,style#40,unid#41,pl#42,usid_src#43,resinip#44,upstreamtime#45,uuid#46,qua#47,q_ext#48,line#49,logdate#25]
> +- Filter (cast(logdate#25 as double) = cast(201605050000 as double))
> +- MetastoreRelation default, wap_nginx_5min, None
> == Optimized Logical Plan ==
> Limit 20
> +- Filter (cast(logdate#25 as double) = 2.0160505E11)
> +- MetastoreRelation default, wap_nginx_5min, None
> == Physical Plan ==
> Limit 20
> +- HiveTableScan
> [ip#26,field1#27,field2#28,field3#29,manualtime#30,timezone#31,pbstr#32,retcode#33,pagesize#34,refer#35,useragent#36,field4#37,responsetime#38,usid#39,style#40,unid#41,pl#42,usid_src#43,resinip#44,upstreamtime#45,uuid#46,qua#47,q_ext#48,line#49,logdate#25],
> MetastoreRelation default, wap_nginx_5min, None, [(cast(logdate#25 as
> double) = 2.0160505E11)]
> {noformat}
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