FAQ
Author: gunther
Date: Fri Mar 7 20:36:11 2014
New Revision: 1575393

URL: http://svn.apache.org/r1575393
Log:
HIVE-6566: Incorrect union-all plan with map-joins on Tez (Gunther Hagleitner, reviewed by Sergey Shelukhin)

Added:
     hive/branches/branch-0.13/ql/src/test/queries/clientpositive/tez_union.q
     hive/branches/branch-0.13/ql/src/test/results/clientpositive/tez/tez_union.q.out
Modified:
     hive/branches/branch-0.13/itests/qtest/pom.xml
     hive/branches/branch-0.13/ql/src/java/org/apache/hadoop/hive/ql/parse/GenTezUtils.java
     hive/branches/branch-0.13/ql/src/java/org/apache/hadoop/hive/ql/parse/GenTezWork.java

Modified: hive/branches/branch-0.13/itests/qtest/pom.xml
URL: http://svn.apache.org/viewvc/hive/branches/branch-0.13/itests/qtest/pom.xml?rev=1575393&r1=1575392&r2=1575393&view=diff
==============================================================================
--- hive/branches/branch-0.13/itests/qtest/pom.xml (original)
+++ hive/branches/branch-0.13/itests/qtest/pom.xml Fri Mar 7 20:36:11 2014
@@ -38,7 +38,7 @@
      <execute.beeline.tests>false</execute.beeline.tests>
      <minimr.query.files>stats_counter_partitioned.q,list_bucket_dml_10.q,input16_cc.q,scriptfile1.q,scriptfile1_win.q,bucket4.q,bucketmapjoin6.q,disable_merge_for_bucketing.q,reduce_deduplicate.q,smb_mapjoin_8.q,join1.q,groupby2.q,bucketizedhiveinputformat.q,bucketmapjoin7.q,optrstat_groupby.q,bucket_num_reducers.q,bucket5.q,load_fs2.q,bucket_num_reducers2.q,infer_bucket_sort_merge.q,infer_bucket_sort_reducers_power_two.q,infer_bucket_sort_dyn_part.q,infer_bucket_sort_bucketed_table.q,infer_bucket_sort_map_operators.q,infer_bucket_sort_num_buckets.q,leftsemijoin_mr.q,schemeAuthority.q,schemeAuthority2.q,truncate_column_buckets.q,remote_script.q,,load_hdfs_file_with_space_in_the_name.q,parallel_orderby.q,import_exported_table.q,stats_counter.q,auto_sortmerge_join_16.q,quotedid_smb.q,file_with_header_footer.q,external_table_with_space_in_location_path.q,root_dir_external_table.q,index_bitmap3.q,ql_rewrite_gbtoidx.q,index_bitmap_auto.q,udf_using.q</minimr.query.files>
      <minimr.query.negative.files>cluster_tasklog_retrieval.q,minimr_broken_pipe.q,mapreduce_stack_trace.q,mapreduce_stack_trace_turnoff.q,mapreduce_stack_trace_hadoop20.q,mapreduce_stack_trace_turnoff_hadoop20.q,file_with_header_footer_negative.q,udf_local_resource.q</minimr.query.negative.files>
- <minitez.query.files>tez_join_tests.q,tez_joins_explain.q,mrr.q,tez_dml.q,tez_insert_overwrite_local_directory_1.q</minitez.query.files>
+ <minitez.query.files>tez_join_tests.q,tez_joins_explain.q,mrr.q,tez_dml.q,tez_insert_overwrite_local_directory_1.q,tez_union.q</minitez.query.files>
      <minitez.query.files.shared>join0.q,join1.q,auto_join0.q,auto_join1.q,bucket2.q,bucket3.q,bucket4.q,count.q,create_merge_compressed.q,cross_join.q,ctas.q,custom_input_output_format.q,disable_merge_for_bucketing.q,enforce_order.q,filter_join_breaktask.q,filter_join_breaktask2.q,groupby1.q,groupby2.q,groupby3.q,having.q,insert1.q,insert_into1.q,insert_into2.q,leftsemijoin.q,limit_pushdown.q,load_dyn_part1.q,load_dyn_part2.q,load_dyn_part3.q,mapjoin_mapjoin.q,mapreduce1.q,mapreduce2.q,merge1.q,merge2.q,metadata_only_queries.q,sample1.q,subquery_in.q,subquery_exists.q,vectorization_15.q,ptf.q,stats_counter.q,stats_noscan_1.q,stats_counter_partitioned.q,union2.q,union3.q,union4.q,union5.q,union6.q,union7.q,union8.q,union9.q</minitez.query.files.shared>
      <beeline.positive.exclude>add_part_exist.q,alter1.q,alter2.q,alter4.q,alter5.q,alter_rename_partition.q,alter_rename_partition_authorization.q,archive.q,archive_corrupt.q,archive_multi.q,archive_mr_1806.q,archive_multi_mr_1806.q,authorization_1.q,authorization_2.q,authorization_4.q,authorization_5.q,authorization_6.q,authorization_7.q,ba_table1.q,ba_table2.q,ba_table3.q,ba_table_udfs.q,binary_table_bincolserde.q,binary_table_colserde.q,cluster.q,columnarserde_create_shortcut.q,combine2.q,constant_prop.q,create_nested_type.q,create_or_replace_view.q,create_struct_table.q,create_union_table.q,database.q,database_location.q,database_properties.q,ddltime.q,describe_database_json.q,drop_database_removes_partition_dirs.q,escape1.q,escape2.q,exim_00_nonpart_empty.q,exim_01_nonpart.q,exim_02_00_part_empty.q,exim_02_part.q,exim_03_nonpart_over_compat.q,exim_04_all_part.q,exim_04_evolved_parts.q,exim_05_some_part.q,exim_06_one_part.q,exim_07_all_part_over_nonoverlap.q,exim_08_nonpart_rena
  me.q,exim_09_part_spec_nonoverlap.q,exim_10_external_managed.q,exim_11_managed_external.q,exim_12_external_location.q,exim_13_managed_location.q,exim_14_managed_location_over_existing.q,exim_15_external_part.q,exim_16_part_external.q,exim_17_part_managed.q,exim_18_part_external.q,exim_19_00_part_external_location.q,exim_19_part_external_location.q,exim_20_part_managed_location.q,exim_21_export_authsuccess.q,exim_22_import_exist_authsuccess.q,exim_23_import_part_authsuccess.q,exim_24_import_nonexist_authsuccess.q,global_limit.q,groupby_complex_types.q,groupby_complex_types_multi_single_reducer.q,index_auth.q,index_auto.q,index_auto_empty.q,index_bitmap.q,index_bitmap1.q,index_bitmap2.q,index_bitmap3.q,index_bitmap_auto.q,index_bitmap_rc.q,index_compact.q,index_compact_1.q,index_compact_2.q,index_compact_3.q,index_stale_partitioned.q,init_file.q,input16.q,input16_cc.q,input46.q,input_columnarserde.q,input_dynamicserde.q,input_lazyserde.q,input_testxpath3.q,input_testxpath4.q,insert2_o
  verwrite_partitions.q,insertexternal1.q,join_thrift.q,lateral_view.q,load_binary_data.q,load_exist_part_authsuccess.q,load_nonpart_authsuccess.q,load_part_authsuccess.q,loadpart_err.q,lock1.q,lock2.q,lock3.q,lock4.q,merge_dynamic_partition.q,multi_insert.q,multi_insert_move_tasks_share_dependencies.q,null_column.q,ppd_clusterby.q,query_with_semi.q,rename_column.q,sample6.q,sample_islocalmode_hook.q,set_processor_namespaces.q,show_tables.q,source.q,split_sample.q,str_to_map.q,transform1.q,udaf_collect_set.q,udaf_context_ngrams.q,udaf_histogram_numeric.q,udaf_ngrams.q,udaf_percentile_approx.q,udf_array.q,udf_bitmap_and.q,udf_bitmap_or.q,udf_explode.q,udf_format_number.q,udf_map.q,udf_map_keys.q,udf_map_values.q,udf_max.q,udf_min.q,udf_named_struct.q,udf_percentile.q,udf_printf.q,udf_sentences.q,udf_sort_array.q,udf_split.q,udf_struct.q,udf_substr.q,udf_translate.q,udf_union.q,udf_xpath.q,udtf_stack.q,view.q,virtual_column.q</beeline.positive.exclude>
    </properties>

Modified: hive/branches/branch-0.13/ql/src/java/org/apache/hadoop/hive/ql/parse/GenTezUtils.java
URL: http://svn.apache.org/viewvc/hive/branches/branch-0.13/ql/src/java/org/apache/hadoop/hive/ql/parse/GenTezUtils.java?rev=1575393&r1=1575392&r2=1575393&view=diff
==============================================================================
--- hive/branches/branch-0.13/ql/src/java/org/apache/hadoop/hive/ql/parse/GenTezUtils.java (original)
+++ hive/branches/branch-0.13/ql/src/java/org/apache/hadoop/hive/ql/parse/GenTezUtils.java Fri Mar 7 20:36:11 2014
@@ -35,6 +35,7 @@ import org.apache.hadoop.conf.Configurat
  import org.apache.hadoop.hive.conf.HiveConf;
  import org.apache.hadoop.hive.ql.exec.Operator;
  import org.apache.hadoop.hive.ql.exec.FileSinkOperator;
+import org.apache.hadoop.hive.ql.exec.HashTableDummyOperator;
  import org.apache.hadoop.hive.ql.exec.ReduceSinkOperator;
  import org.apache.hadoop.hive.ql.exec.TableScanOperator;
  import org.apache.hadoop.hive.ql.exec.UnionOperator;
@@ -160,15 +161,32 @@ public class GenTezUtils {
      throws SemanticException {

      Set<Operator<?>> roots = work.getAllRootOperators();
+ if (work.getDummyOps() != null) {
+ roots.addAll(work.getDummyOps());
+ }

      // need to clone the plan.
      Set<Operator<?>> newRoots = Utilities.cloneOperatorTree(conf, roots);

+ // we're cloning the operator plan but we're retaining the original work. That means
+ // that root operators have to be replaced with the cloned ops. The replacement map
+ // tells you what that mapping is.
      Map<Operator<?>, Operator<?>> replacementMap = new HashMap<Operator<?>, Operator<?>>();

+ // there's some special handling for dummyOps required. Mapjoins won't be properly
+ // initialized if their dummy parents aren't initialized. Since we cloned the plan
+ // we need to replace the dummy operators in the work with the cloned ones.
+ List<HashTableDummyOperator> dummyOps = new LinkedList<HashTableDummyOperator>();
+
      Iterator<Operator<?>> it = newRoots.iterator();
      for (Operator<?> orig: roots) {
- replacementMap.put(orig,it.next());
+ Operator<?> newRoot = it.next();
+ if (newRoot instanceof HashTableDummyOperator) {
+ dummyOps.add((HashTableDummyOperator)newRoot);
+ it.remove();
+ } else {
+ replacementMap.put(orig,newRoot);
+ }
      }

      // now we remove all the unions. we throw away any branch that's not reachable from
@@ -233,6 +251,7 @@ public class GenTezUtils {
          operators.addAll(current.getChildOperators());
        }
      }
+ work.setDummyOps(dummyOps);
      work.replaceRoots(replacementMap);
    }


Modified: hive/branches/branch-0.13/ql/src/java/org/apache/hadoop/hive/ql/parse/GenTezWork.java
URL: http://svn.apache.org/viewvc/hive/branches/branch-0.13/ql/src/java/org/apache/hadoop/hive/ql/parse/GenTezWork.java?rev=1575393&r1=1575392&r2=1575393&view=diff
==============================================================================
--- hive/branches/branch-0.13/ql/src/java/org/apache/hadoop/hive/ql/parse/GenTezWork.java (original)
+++ hive/branches/branch-0.13/ql/src/java/org/apache/hadoop/hive/ql/parse/GenTezWork.java Fri Mar 7 20:36:11 2014
@@ -112,6 +112,42 @@ public class GenTezWork implements NodeP
        }
        context.rootToWorkMap.put(root, work);
      }
+ context.operatorWorkMap.put(operator, work);
+
+ /*
+ * this happens in case of map join operations.
+ * The tree looks like this:
+ *
+ * RS <--- we are here perhaps
+ * |
+ * MapJoin
+ * / \
+ * RS TS
+ * /
+ * TS
+ *
+ * If we are at the RS pointed above, and we may have already visited the
+ * RS following the TS, we have already generated work for the TS-RS.
+ * We need to hook the current work to this generated work.
+ */
+ List<BaseWork> linkWorkList = context.linkOpWithWorkMap.get(operator);
+ if (linkWorkList != null) {
+ if (context.linkChildOpWithDummyOp.containsKey(operator)) {
+ for (Operator<?> dummy: context.linkChildOpWithDummyOp.get(operator)) {
+ work.addDummyOp((HashTableDummyOperator) dummy);
+ }
+ }
+ for (BaseWork parentWork : linkWorkList) {
+ tezWork.connect(parentWork, work, EdgeType.BROADCAST_EDGE);
+
+ // need to set up output name for reduce sink now that we know the name
+ // of the downstream work
+ for (ReduceSinkOperator r:
+ context.linkWorkWithReduceSinkMap.get(parentWork)) {
+ r.getConf().setOutputName(work.getName());
+ }
+ }
+ }

      // This is where we cut the tree as described above. We also remember that
      // we might have to connect parent work with this work later.
@@ -191,42 +227,6 @@ public class GenTezWork implements NodeP
        context.preceedingWork = work;
      }

- /*
- * this happens in case of map join operations.
- * The tree looks like this:
- *
- * RS <--- we are here perhaps
- * |
- * MapJoin
- * / \
- * RS TS
- * /
- * TS
- *
- * If we are at the RS pointed above, and we may have already visited the
- * RS following the TS, we have already generated work for the TS-RS.
- * We need to hook the current work to this generated work.
- */
- context.operatorWorkMap.put(operator, work);
- List<BaseWork> linkWorkList = context.linkOpWithWorkMap.get(operator);
- if (linkWorkList != null) {
- if (context.linkChildOpWithDummyOp.containsKey(operator)) {
- for (Operator<?> dummy: context.linkChildOpWithDummyOp.get(operator)) {
- work.addDummyOp((HashTableDummyOperator) dummy);
- }
- }
- for (BaseWork parentWork : linkWorkList) {
- tezWork.connect(parentWork, work, EdgeType.BROADCAST_EDGE);
-
- // need to set up output name for reduce sink now that we know the name
- // of the downstream work
- for (ReduceSinkOperator r:
- context.linkWorkWithReduceSinkMap.get(parentWork)) {
- r.getConf().setOutputName(work.getName());
- }
- }
- }
-
      return null;
    }
  }

Added: hive/branches/branch-0.13/ql/src/test/queries/clientpositive/tez_union.q
URL: http://svn.apache.org/viewvc/hive/branches/branch-0.13/ql/src/test/queries/clientpositive/tez_union.q?rev=1575393&view=auto
==============================================================================
--- hive/branches/branch-0.13/ql/src/test/queries/clientpositive/tez_union.q (added)
+++ hive/branches/branch-0.13/ql/src/test/queries/clientpositive/tez_union.q Fri Mar 7 20:36:11 2014
@@ -0,0 +1,10 @@
+set hive.auto.convert.join=true;
+
+explain
+select s1.key as key, s1.value as value from src s1 join src s3 on s1.key=s3.key
+UNION ALL
+select s2.key as key, s2.value as value from src s2;
+
+select s1.key as key, s1.value as value from src s1 join src s3 on s1.key=s3.key
+UNION ALL
+select s2.key as key, s2.value as value from src s2;
\ No newline at end of file

Added: hive/branches/branch-0.13/ql/src/test/results/clientpositive/tez/tez_union.q.out
URL: http://svn.apache.org/viewvc/hive/branches/branch-0.13/ql/src/test/results/clientpositive/tez/tez_union.q.out?rev=1575393&view=auto
==============================================================================
--- hive/branches/branch-0.13/ql/src/test/results/clientpositive/tez/tez_union.q.out (added)
+++ hive/branches/branch-0.13/ql/src/test/results/clientpositive/tez/tez_union.q.out Fri Mar 7 20:36:11 2014
@@ -0,0 +1,1621 @@
+PREHOOK: query: explain
+select s1.key as key, s1.value as value from src s1 join src s3 on s1.key=s3.key
+UNION ALL
+select s2.key as key, s2.value as value from src s2
+PREHOOK: type: QUERY
+POSTHOOK: query: explain
+select s1.key as key, s1.value as value from src s1 join src s3 on s1.key=s3.key
+UNION ALL
+select s2.key as key, s2.value as value from src s2
+POSTHOOK: type: QUERY
+STAGE DEPENDENCIES:
+ Stage-1 is a root stage
+ Stage-0 is a root stage
+
+STAGE PLANS:
+ Stage: Stage-1
+ Tez
+ Edges:
+ Map 1 <- Union 2 (CONTAINS), Map 3 (BROADCAST_EDGE)
+ Map 4 <- Union 2 (CONTAINS)
+#### A masked pattern was here ####
+ Vertices:
+ Map 1
+ Map Operator Tree:
+ TableScan
+ alias: s1
+ Map Join Operator
+ condition map:
+ Inner Join 0 to 1
+ condition expressions:
+ 0 {key} {value}
+ 1
+ keys:
+ 0 key (type: string)
+ 1 key (type: string)
+ outputColumnNames: _col0, _col1
+ Select Operator
+ expressions: _col0 (type: string), _col1 (type: string)
+ outputColumnNames: _col0, _col1
+ Select Operator
+ expressions: _col0 (type: string), _col1 (type: string)
+ outputColumnNames: _col0, _col1
+ File Output Operator
+ compressed: false
+ table:
+ input format: org.apache.hadoop.mapred.TextInputFormat
+ output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
+ serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
+ Map 3
+ Map Operator Tree:
+ TableScan
+ alias: s3
+ Statistics: Num rows: 58 Data size: 5812 Basic stats: COMPLETE Column stats: NONE
+ Reduce Output Operator
+ key expressions: key (type: string)
+ sort order: +
+ Map-reduce partition columns: key (type: string)
+ Statistics: Num rows: 58 Data size: 5812 Basic stats: COMPLETE Column stats: NONE
+ Map 4
+ Map Operator Tree:
+ TableScan
+ alias: s2
+ Select Operator
+ expressions: key (type: string), value (type: string)
+ outputColumnNames: _col0, _col1
+ Select Operator
+ expressions: _col0 (type: string), _col1 (type: string)
+ outputColumnNames: _col0, _col1
+ File Output Operator
+ compressed: false
+ table:
+ input format: org.apache.hadoop.mapred.TextInputFormat
+ output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
+ serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
+ Union 2
+ Vertex: Union 2
+
+ Stage: Stage-0
+ Fetch Operator
+ limit: -1
+
+PREHOOK: query: select s1.key as key, s1.value as value from src s1 join src s3 on s1.key=s3.key
+UNION ALL
+select s2.key as key, s2.value as value from src s2
+PREHOOK: type: QUERY
+PREHOOK: Input: default@src
+#### A masked pattern was here ####
+POSTHOOK: query: select s1.key as key, s1.value as value from src s1 join src s3 on s1.key=s3.key
+UNION ALL
+select s2.key as key, s2.value as value from src s2
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@src
+#### A masked pattern was here ####
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+27 val_27
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+255 val_255
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