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From Siva Gudavalli <gudavalli.s...@yahoo.com.INVALID>
Subject Re: Orc predicate pushdown with Spark Sql
Date Tue, 24 Oct 2017 16:16:09 GMT

Hello, I have an update here.  spark SQL is pushing predicates down, if I load the orc
files in spark Context and Is not the same when I try to read hive Table directly.please let
me know if i am missing something here. Is this supported in spark  ?  when I load the
files in spark Context 
scala> val hhhhhlogsv5 = sqlContext.read.format("orc").load("/user/hive/warehouse/hhhhhlogsv5")
17/10/24 16:11:15 INFO OrcRelation: Listing maprfs:///user/hive/warehouse/hhhhhlogsv5 on driver
17/10/24 16:11:15 INFO OrcRelation: Listing maprfs:///user/hive/warehouse/hhhhhlogsv5/cdt=20171003
on driver
17/10/24 16:11:15 INFO OrcRelation: Listing maprfs:///user/hive/warehouse/hhhhhlogsv5/cdt=20171003/catpartkey=others
on driver
17/10/24 16:11:15 INFO OrcRelation: Listing maprfs:///user/hive/warehouse/hhhhhlogsv5/cdt=20171003/catpartkey=others/usrpartkey=hhhUsers
on driver
hhhhhlogsv5: org.apache.spark.sql.DataFrame = [id: string, chn: string, ht: string, br: string,
rg: string, cat: int, scat: int, usr: string, org: string, act: int, ctm: int, c1: string,
c2: string, c3: string, d1: int, d2: int, doc: binary, cdt: int, catpartkey: string, usrpartkey:
string]scala> hhhhhlogsv5.registerTempTable("tempo")scala> sqlContext.sql ( "selecT
id from tempo where cdt=20171003 and usrpartkey = 'hhhUsers' and usr='AA0YP' order by id desc
limit 10" ).explain
17/10/24 16:11:22 INFO ParseDriver: Parsing command: selecT id from tempo where cdt=20171003
and usrpartkey = 'hhhUsers' and usr='AA0YP' order by id desc limit 10
17/10/24 16:11:22 INFO ParseDriver: Parse Completed
17/10/24 16:11:22 INFO DataSourceStrategy: Selected 1 partitions out of 1, pruned 0.0% partitions.
17/10/24 16:11:22 INFO MemoryStore: Block broadcast_6 stored as values in memory (estimated
size 164.5 KB, free 468.0 KB)
17/10/24 16:11:22 INFO MemoryStore: Block broadcast_6_piece0 stored as bytes in memory (estimated
size 18.3 KB, free 486.4 KB)
17/10/24 16:11:22 INFO BlockManagerInfo: Added broadcast_6_piece0 in memory on 172.21.158.61:43493
(size: 18.3 KB, free: 511.4 MB)
17/10/24 16:11:22 INFO SparkContext: Created broadcast 6 from explain at <console>:33
17/10/24 16:11:22 INFO MemoryStore: Block broadcast_7 stored as values in memory (estimated
size 170.2 KB, free 656.6 KB)
17/10/24 16:11:22 INFO MemoryStore: Block broadcast_7_piece0 stored as bytes in memory (estimated
size 18.8 KB, free 675.4 KB)
17/10/24 16:11:22 INFO BlockManagerInfo: Added broadcast_7_piece0 in memory on 172.21.158.61:43493
(size: 18.8 KB, free: 511.4 MB)
17/10/24 16:11:22 INFO SparkContext: Created broadcast 7 from explain at <console>:33
== Physical Plan ==
TakeOrderedAndProject(limit=10, orderBy=[id#145 DESC], output=[id#145])
+- ConvertToSafe
+- Project [id#145]
+- Filter (usr#152 = AA0YP)
+- Scan OrcRelation[id#145,usr#152] InputPaths: maprfs:///user/hive/warehouse/hhhhhlogsv5,
PushedFilters: [EqualTo(usr,AA0YP)]
 when i read this as hive Table 
 scala> sqlContext.sql ( "selecT id from hhhhhlogsv5 where cdt=20171003 and usrpartkey
= 'hhhUsers' and usr='AA0YP' order by id desc limit 10" ).explain
17/10/24 16:11:32 INFO ParseDriver: Parsing command: selecT id from hhhhhlogsv5 where cdt=20171003
and usrpartkey = 'hhhUsers' and usr='AA0YP' order by id desc limit 10
17/10/24 16:11:32 INFO ParseDriver: Parse Completed
17/10/24 16:11:32 INFO MemoryStore: Block broadcast_8 stored as values in memory (estimated
size 399.1 KB, free 1074.6 KB)
17/10/24 16:11:32 INFO MemoryStore: Block broadcast_8_piece0 stored as bytes in memory (estimated
size 42.7 KB, free 1117.2 KB)
17/10/24 16:11:32 INFO BlockManagerInfo: Added broadcast_8_piece0 in memory on 172.21.158.61:43493
(size: 42.7 KB, free: 511.4 MB)
17/10/24 16:11:32 INFO SparkContext: Created broadcast 8 from explain at <console>:33
== Physical Plan ==
TakeOrderedAndProject(limit=10, orderBy=[id#192 DESC], output=[id#192])
+- ConvertToSafe
+- Project [id#192]
+- Filter (usr#199 = AA0YP)
+- HiveTableScan [id#192,usr#199], MetastoreRelation default, hhhhhlogsv5, None, [(cdt#189
= 20171003),(usrpartkey#191 = hhhUsers)]
  please let me know if i am missing anything here. thank you 

    On Monday, October 23, 2017 1:56 PM, Siva Gudavalli <gss.subbu@gmail.com> wrote:
 

 Hello, I am working with Spark SQL to query Hive Managed Table (in Orc Format) I have my
data organized by partitions and asked to set indexes for each 50,000 Rows by setting ('orc.row.index.stride'='50000')  lets
say -> after evaluating partition there are around 50 files in which data is organized. Each
file contains data specific to one given "cat" and I have set up a bloom filter on cat. 
my spark SQL query looks like this -> select * from logs where cdt= 20171002 and catpartkey=
others and usrpartkey= logUsers and cat = 24;
 I have set following property in my spark Sql context and assuming this will push down the
filters 
sqlContext.setConf("spark.sql.orc.filterPushdown", "true")
 Never my filters are being pushed down. and it seems like partition pruning is happening
on all files. I dont understand no matter what my query is, it is triggering 50 tasks and
reading all files.  Here is my debug logs ->  
17/10/23 17:26:43 DEBUG Inode: >Inode Open file: /apps/spark/auditlogsv5/cdt=20171002/catpartkey=others/usrpartkey=logUsers/000026_0,
size: 401517212, chunkSize: 268435456, fid: 2052.225472.4786362
17/10/23 17:26:43 DEBUG OrcInputFormat: No ORC pushdown predicate
17/10/23 17:26:43 INFO OrcRawRecordMerger: min key = null, max key = null
17/10/23 17:26:43 INFO ReaderImpl: Reading ORC rows from maprfs:///apps/spark/logs/cdt=20171002/catpartkey=others/usrpartkey=logUsers/000026_0
with {include: [true, true, false, false, false, false, true, false, false, false, false,
false, false, false, false, false, false, false], offset: 0, length: 9223372036854775807}
17/10/23 17:26:43 DEBUG MapRClient: Open: path = /apps/spark/auditlogsv5/cdt=20171002/catpartkey=others/usrpartkey=logUsers/000026_0
17/10/23 17:26:43 DEBUG Inode: >Inode Open file: /apps/spark/auditlogsv5/cdt=20171002/catpartkey=others/usrpartkey=logUsers/000026_0,
size: 401517212, chunkSize: 268435456, fid: 2052.225472.4786362
17/10/23 17:26:43 DEBUG RecordReaderImpl: chunks = [range start: 67684 end: 15790993, range
start: 21131541 end: 21146035]
17/10/23 17:26:43 DEBUG RecordReaderImpl: merge = [data range [67684, 15790993), size: 15723309
type: array-backed, data range [21131541, 21146035), size: 14494 type: array-backed]
17/10/23 17:26:43 DEBUG Utilities: Hive Conf not found or Session not initiated, use thread
based class loader instead
17/10/23 17:26:43 DEBUG HadoopTableReader: org.apache.hadoop.hive.ql.io.orc.OrcStruct$OrcStructInspector<org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableStringObjectInspector@7c1bb45,org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableStringObjectInspector@7c1bb45,org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableStringObjectInspector@7c1bb45,org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableStringObjectInspector@7c1bb45,org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableStringObjectInspector@7c1bb45,org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableIntObjectInspector@3fedb2fd,org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableIntObjectInspector@3fedb2fd,org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableStringObjectInspector@7c1bb45,org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableStringObjectInspector@7c1bb45,org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableIntObjectInspector@3fedb2fd,org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableIntObjectInspector@3fedb2fd,org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableStringObjectInspector@7c1bb45,org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableStringObjectInspector@7c1bb45,org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableStringObjectInspector@7c1bb45,org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableIntObjectInspector@3fedb2fd,org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableIntObjectInspector@3fedb2fd,org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableBinaryObjectInspector@e8220d5>
17/10/23 17:26:43 DEBUG GeneratePredicate: Generated predicate '(input[1, IntegerType] = 27)':
 and here is my execution plan 
== Parsed Logical Plan ==
'Limit 1000
+- 'Sort ['id DESC], true
+- 'Project [unresolvedalias('id)]
+- 'Filter (((('cdt = 20171002) && ('catpartkey = others)) && ('usrpartkey
= logUsers)) && ('cat = 27))
+- 'UnresolvedRelation `auditlogsv5`, None== Analyzed Logical Plan ==
id: string
Limit 1000
+- Sort [id#165 DESC], true
+- Project [id#165]
+- Filter ((((cdt#162 = 20171002) && (catpartkey#163 = others)) && (usrpartkey#164
= logUsers)) && (cat#170 = 27))
+- MetastoreRelation default, auditlogsv5, None== Optimized Logical Plan ==
Limit 1000
+- Sort [id#165 DESC], true
+- Project [id#165]
+- Filter ((((cdt#162 = 20171002) && (catpartkey#163 = others)) && (usrpartkey#164
= logUsers)) && (cat#170 = 27))
+- MetastoreRelation default, auditlogsv5, None== Physical Plan ==
TakeOrderedAndProject(limit=1000, orderBy=[id#165 DESC], output=[id#165])
+- ConvertToSafe
+- Project [id#165]
+- Filter (cat#170 = 27)
+- HiveTableScan [id#165,cat#170], MetastoreRelation default, logs, None, [(cdt#162 = 20171002),(catpartkey#163
= others),(usrpartkey#164 = logUsers)]
  Am I missing something here. I am on spark 1.6.1 and hive 1.2.0 please correct me. Thank
you

   
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