FAQ
Added: hive/trunk/ql/src/test/results/clientpositive/smb_mapjoin_14.q.out
URL: http://svn.apache.org/viewvc/hive/trunk/ql/src/test/results/clientpositive/smb_mapjoin_14.q.out?rev=1423731&view=auto
==============================================================================
--- hive/trunk/ql/src/test/results/clientpositive/smb_mapjoin_14.q.out (added)
+++ hive/trunk/ql/src/test/results/clientpositive/smb_mapjoin_14.q.out Wed Dec 19 01:20:56 2012
@@ -0,0 +1,2149 @@
+PREHOOK: query: CREATE TABLE tbl1(key int, value string) CLUSTERED BY (key) SORTED BY (key) INTO 2 BUCKETS
+PREHOOK: type: CREATETABLE
+POSTHOOK: query: CREATE TABLE tbl1(key int, value string) CLUSTERED BY (key) SORTED BY (key) INTO 2 BUCKETS
+POSTHOOK: type: CREATETABLE
+POSTHOOK: Output: default@tbl1
+PREHOOK: query: CREATE TABLE tbl2(key int, value string) CLUSTERED BY (key) SORTED BY (key) INTO 2 BUCKETS
+PREHOOK: type: CREATETABLE
+POSTHOOK: query: CREATE TABLE tbl2(key int, value string) CLUSTERED BY (key) SORTED BY (key) INTO 2 BUCKETS
+POSTHOOK: type: CREATETABLE
+POSTHOOK: Output: default@tbl2
+PREHOOK: query: insert overwrite table tbl1
+select * from src where key < 10
+PREHOOK: type: QUERY
+PREHOOK: Input: default@src
+PREHOOK: Output: default@tbl1
+POSTHOOK: query: insert overwrite table tbl1
+select * from src where key < 10
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@src
+POSTHOOK: Output: default@tbl1
+POSTHOOK: Lineage: tbl1.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl1.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+PREHOOK: query: insert overwrite table tbl2
+select * from src where key < 10
+PREHOOK: type: QUERY
+PREHOOK: Input: default@src
+PREHOOK: Output: default@tbl2
+POSTHOOK: query: insert overwrite table tbl2
+select * from src where key < 10
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@src
+POSTHOOK: Output: default@tbl2
+POSTHOOK: Lineage: tbl1.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl1.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+PREHOOK: query: -- The mapjoin is being performed as part of sub-query. It should be converted to a sort-merge join
+explain
+select count(*) from (
+ select /*+mapjoin(a)*/ a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+) subq1
+PREHOOK: type: QUERY
+POSTHOOK: query: -- The mapjoin is being performed as part of sub-query. It should be converted to a sort-merge join
+explain
+select count(*) from (
+ select /*+mapjoin(a)*/ a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+) subq1
+POSTHOOK: type: QUERY
+POSTHOOK: Lineage: tbl1.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl1.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+ABSTRACT SYNTAX TREE:
+ (TOK_QUERY (TOK_FROM (TOK_SUBQUERY (TOK_QUERY (TOK_FROM (TOK_JOIN (TOK_TABREF (TOK_TABNAME tbl1) a) (TOK_TABREF (TOK_TABNAME tbl2) b) (= (. (TOK_TABLE_OR_COL a) key) (. (TOK_TABLE_OR_COL b) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_HINTLIST (TOK_HINT TOK_MAPJOIN (TOK_HINTARGLIST a))) (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) key) key) (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) value) val1) (TOK_SELEXPR (. (TOK_TABLE_OR_COL b) value) val2)))) subq1)) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (TOK_FUNCTIONSTAR count)))))
+
+STAGE DEPENDENCIES:
+ Stage-1 is a root stage
+ Stage-2 depends on stages: Stage-1
+ Stage-0 is a root stage
+
+STAGE PLANS:
+ Stage: Stage-1
+ Map Reduce
+ Alias -> Map Operator Tree:
+ subq1:b
+ TableScan
+ alias: b
+ Sorted Merge Bucket Map Join Operator
+ condition map:
+ Inner Join 0 to 1
+ condition expressions:
+ 0
+ 1
+ handleSkewJoin: false
+ keys:
+ 0 [Column[key]]
+ 1 [Column[key]]
+ Position of Big Table: 1
+ File Output Operator
+ compressed: false
+ GlobalTableId: 0
+ table:
+ input format: org.apache.hadoop.mapred.SequenceFileInputFormat
+ output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
+
+ Stage: Stage-2
+ Map Reduce
+ Alias -> Map Operator Tree:
+#### A masked pattern was here ####
+ Select Operator
+ Select Operator
+ Select Operator
+ Group By Operator
+ aggregations:
+ expr: count()
+ bucketGroup: false
+ mode: hash
+ outputColumnNames: _col0
+ Reduce Output Operator
+ sort order:
+ tag: -1
+ value expressions:
+ expr: _col0
+ type: bigint
+ Reduce Operator Tree:
+ Group By Operator
+ aggregations:
+ expr: count(VALUE._col0)
+ bucketGroup: false
+ mode: mergepartial
+ outputColumnNames: _col0
+ Select Operator
+ expressions:
+ expr: _col0
+ type: bigint
+ outputColumnNames: _col0
+ File Output Operator
+ compressed: false
+ GlobalTableId: 0
+ table:
+ input format: org.apache.hadoop.mapred.TextInputFormat
+ output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
+
+ Stage: Stage-0
+ Fetch Operator
+ limit: -1
+
+
+PREHOOK: query: select count(*) from (
+ select /*+mapjoin(a)*/ a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+) subq1
+PREHOOK: type: QUERY
+PREHOOK: Input: default@tbl1
+PREHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: query: select count(*) from (
+ select /*+mapjoin(a)*/ a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+) subq1
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@tbl1
+POSTHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: Lineage: tbl1.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl1.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+22
+PREHOOK: query: -- The mapjoin is being performed as part of sub-query. It should be converted to a sort-merge join
+-- Add a order by at the end to make the results deterministic.
+explain
+select key, count(*) from
+(
+ select /*+mapjoin(a)*/ a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+) subq1
+group by key
+order by key
+PREHOOK: type: QUERY
+POSTHOOK: query: -- The mapjoin is being performed as part of sub-query. It should be converted to a sort-merge join
+-- Add a order by at the end to make the results deterministic.
+explain
+select key, count(*) from
+(
+ select /*+mapjoin(a)*/ a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+) subq1
+group by key
+order by key
+POSTHOOK: type: QUERY
+POSTHOOK: Lineage: tbl1.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl1.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+ABSTRACT SYNTAX TREE:
+ (TOK_QUERY (TOK_FROM (TOK_SUBQUERY (TOK_QUERY (TOK_FROM (TOK_JOIN (TOK_TABREF (TOK_TABNAME tbl1) a) (TOK_TABREF (TOK_TABNAME tbl2) b) (= (. (TOK_TABLE_OR_COL a) key) (. (TOK_TABLE_OR_COL b) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_HINTLIST (TOK_HINT TOK_MAPJOIN (TOK_HINTARGLIST a))) (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) key) key) (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) value) val1) (TOK_SELEXPR (. (TOK_TABLE_OR_COL b) value) val2)))) subq1)) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (TOK_TABLE_OR_COL key)) (TOK_SELEXPR (TOK_FUNCTIONSTAR count))) (TOK_GROUPBY (TOK_TABLE_OR_COL key)) (TOK_ORDERBY (TOK_TABSORTCOLNAMEASC (TOK_TABLE_OR_COL key)))))
+
+STAGE DEPENDENCIES:
+ Stage-1 is a root stage
+ Stage-2 depends on stages: Stage-1
+ Stage-3 depends on stages: Stage-2
+ Stage-0 is a root stage
+
+STAGE PLANS:
+ Stage: Stage-1
+ Map Reduce
+ Alias -> Map Operator Tree:
+ subq1:b
+ TableScan
+ alias: b
+ Sorted Merge Bucket Map Join Operator
+ condition map:
+ Inner Join 0 to 1
+ condition expressions:
+ 0 {key}
+ 1
+ handleSkewJoin: false
+ keys:
+ 0 [Column[key]]
+ 1 [Column[key]]
+ outputColumnNames: _col0
+ Position of Big Table: 1
+ File Output Operator
+ compressed: false
+ GlobalTableId: 0
+ table:
+ input format: org.apache.hadoop.mapred.SequenceFileInputFormat
+ output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
+
+ Stage: Stage-2
+ Map Reduce
+ Alias -> Map Operator Tree:
+#### A masked pattern was here ####
+ Select Operator
+ expressions:
+ expr: _col0
+ type: int
+ outputColumnNames: _col0
+ Select Operator
+ expressions:
+ expr: _col0
+ type: int
+ outputColumnNames: _col0
+ Select Operator
+ expressions:
+ expr: _col0
+ type: int
+ outputColumnNames: _col0
+ Group By Operator
+ aggregations:
+ expr: count()
+ bucketGroup: false
+ keys:
+ expr: _col0
+ type: int
+ mode: hash
+ outputColumnNames: _col0, _col1
+ Reduce Output Operator
+ key expressions:
+ expr: _col0
+ type: int
+ sort order: +
+ Map-reduce partition columns:
+ expr: _col0
+ type: int
+ tag: -1
+ value expressions:
+ expr: _col1
+ type: bigint
+ Reduce Operator Tree:
+ Group By Operator
+ aggregations:
+ expr: count(VALUE._col0)
+ bucketGroup: false
+ keys:
+ expr: KEY._col0
+ type: int
+ mode: mergepartial
+ outputColumnNames: _col0, _col1
+ Select Operator
+ expressions:
+ expr: _col0
+ type: int
+ expr: _col1
+ type: bigint
+ outputColumnNames: _col0, _col1
+ File Output Operator
+ compressed: false
+ GlobalTableId: 0
+ table:
+ input format: org.apache.hadoop.mapred.SequenceFileInputFormat
+ output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
+
+ Stage: Stage-3
+ Map Reduce
+ Alias -> Map Operator Tree:
+#### A masked pattern was here ####
+ Reduce Output Operator
+ key expressions:
+ expr: _col0
+ type: int
+ sort order: +
+ tag: -1
+ value expressions:
+ expr: _col0
+ type: int
+ expr: _col1
+ type: bigint
+ Reduce Operator Tree:
+ Extract
+ File Output Operator
+ compressed: false
+ GlobalTableId: 0
+ table:
+ input format: org.apache.hadoop.mapred.TextInputFormat
+ output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
+
+ Stage: Stage-0
+ Fetch Operator
+ limit: -1
+
+
+PREHOOK: query: select key, count(*) from
+(
+ select /*+mapjoin(a)*/ a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+) subq1
+group by key
+order by key
+PREHOOK: type: QUERY
+PREHOOK: Input: default@tbl1
+PREHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: query: select key, count(*) from
+(
+ select /*+mapjoin(a)*/ a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+) subq1
+group by key
+order by key
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@tbl1
+POSTHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: Lineage: tbl1.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl1.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+0 9
+2 1
+4 1
+5 9
+8 1
+9 1
+PREHOOK: query: -- The mapjoin is being performed as part of more than one sub-query. It should be converted to a sort-merge join
+explain
+select count(*) from
+(
+ select key, count(*) from
+ (
+ select /*+mapjoin(a)*/ a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+ ) subq1
+ group by key
+) subq2
+PREHOOK: type: QUERY
+POSTHOOK: query: -- The mapjoin is being performed as part of more than one sub-query. It should be converted to a sort-merge join
+explain
+select count(*) from
+(
+ select key, count(*) from
+ (
+ select /*+mapjoin(a)*/ a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+ ) subq1
+ group by key
+) subq2
+POSTHOOK: type: QUERY
+POSTHOOK: Lineage: tbl1.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl1.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+ABSTRACT SYNTAX TREE:
+ (TOK_QUERY (TOK_FROM (TOK_SUBQUERY (TOK_QUERY (TOK_FROM (TOK_SUBQUERY (TOK_QUERY (TOK_FROM (TOK_JOIN (TOK_TABREF (TOK_TABNAME tbl1) a) (TOK_TABREF (TOK_TABNAME tbl2) b) (= (. (TOK_TABLE_OR_COL a) key) (. (TOK_TABLE_OR_COL b) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_HINTLIST (TOK_HINT TOK_MAPJOIN (TOK_HINTARGLIST a))) (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) key) key) (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) value) val1) (TOK_SELEXPR (. (TOK_TABLE_OR_COL b) value) val2)))) subq1)) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (TOK_TABLE_OR_COL key)) (TOK_SELEXPR (TOK_FUNCTIONSTAR count))) (TOK_GROUPBY (TOK_TABLE_OR_COL key)))) subq2)) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (TOK_FUNCTIONSTAR count)))))
+
+STAGE DEPENDENCIES:
+ Stage-1 is a root stage
+ Stage-2 depends on stages: Stage-1
+ Stage-3 depends on stages: Stage-2
+ Stage-0 is a root stage
+
+STAGE PLANS:
+ Stage: Stage-1
+ Map Reduce
+ Alias -> Map Operator Tree:
+ subq2:subq1:b
+ TableScan
+ alias: b
+ Sorted Merge Bucket Map Join Operator
+ condition map:
+ Inner Join 0 to 1
+ condition expressions:
+ 0 {key}
+ 1
+ handleSkewJoin: false
+ keys:
+ 0 [Column[key]]
+ 1 [Column[key]]
+ outputColumnNames: _col0
+ Position of Big Table: 1
+ File Output Operator
+ compressed: false
+ GlobalTableId: 0
+ table:
+ input format: org.apache.hadoop.mapred.SequenceFileInputFormat
+ output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
+
+ Stage: Stage-2
+ Map Reduce
+ Alias -> Map Operator Tree:
+#### A masked pattern was here ####
+ Select Operator
+ expressions:
+ expr: _col0
+ type: int
+ outputColumnNames: _col0
+ Select Operator
+ expressions:
+ expr: _col0
+ type: int
+ outputColumnNames: _col0
+ Select Operator
+ expressions:
+ expr: _col0
+ type: int
+ outputColumnNames: _col0
+ Group By Operator
+ aggregations:
+ expr: count()
+ bucketGroup: false
+ keys:
+ expr: _col0
+ type: int
+ mode: hash
+ outputColumnNames: _col0, _col1
+ Reduce Output Operator
+ key expressions:
+ expr: _col0
+ type: int
+ sort order: +
+ Map-reduce partition columns:
+ expr: _col0
+ type: int
+ tag: -1
+ value expressions:
+ expr: _col1
+ type: bigint
+ Reduce Operator Tree:
+ Group By Operator
+ aggregations:
+ expr: count(VALUE._col0)
+ bucketGroup: false
+ keys:
+ expr: KEY._col0
+ type: int
+ mode: mergepartial
+ outputColumnNames: _col0, _col1
+ Select Operator
+ Select Operator
+ Group By Operator
+ aggregations:
+ expr: count()
+ bucketGroup: false
+ mode: hash
+ outputColumnNames: _col0
+ File Output Operator
+ compressed: false
+ GlobalTableId: 0
+ table:
+ input format: org.apache.hadoop.mapred.SequenceFileInputFormat
+ output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
+
+ Stage: Stage-3
+ Map Reduce
+ Alias -> Map Operator Tree:
+#### A masked pattern was here ####
+ Reduce Output Operator
+ sort order:
+ tag: -1
+ value expressions:
+ expr: _col0
+ type: bigint
+ Reduce Operator Tree:
+ Group By Operator
+ aggregations:
+ expr: count(VALUE._col0)
+ bucketGroup: false
+ mode: mergepartial
+ outputColumnNames: _col0
+ Select Operator
+ expressions:
+ expr: _col0
+ type: bigint
+ outputColumnNames: _col0
+ File Output Operator
+ compressed: false
+ GlobalTableId: 0
+ table:
+ input format: org.apache.hadoop.mapred.TextInputFormat
+ output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
+
+ Stage: Stage-0
+ Fetch Operator
+ limit: -1
+
+
+PREHOOK: query: select count(*) from
+(
+ select key, count(*) from
+ (
+ select /*+mapjoin(a)*/ a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+ ) subq1
+ group by key
+) subq2
+PREHOOK: type: QUERY
+PREHOOK: Input: default@tbl1
+PREHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: query: select count(*) from
+(
+ select key, count(*) from
+ (
+ select /*+mapjoin(a)*/ a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+ ) subq1
+ group by key
+) subq2
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@tbl1
+POSTHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: Lineage: tbl1.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl1.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+6
+PREHOOK: query: -- A join is being performed across different sub-queries, where a mapjoin is being performed in each of them.
+-- Each sub-query should be converted to a sort-merge join.
+explain
+select src1.key, src1.cnt1, src2.cnt1 from
+(
+ select key, count(*) as cnt1 from
+ (
+ select /*+mapjoin(a)*/ a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+ ) subq1 group by key
+) src1
+join
+(
+ select key, count(*) as cnt1 from
+ (
+ select /*+mapjoin(a)*/ a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+ ) subq2 group by key
+) src2
+on src1.key = src2.key
+order by src1.key, src1.cnt1, src2.cnt1
+PREHOOK: type: QUERY
+POSTHOOK: query: -- A join is being performed across different sub-queries, where a mapjoin is being performed in each of them.
+-- Each sub-query should be converted to a sort-merge join.
+explain
+select src1.key, src1.cnt1, src2.cnt1 from
+(
+ select key, count(*) as cnt1 from
+ (
+ select /*+mapjoin(a)*/ a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+ ) subq1 group by key
+) src1
+join
+(
+ select key, count(*) as cnt1 from
+ (
+ select /*+mapjoin(a)*/ a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+ ) subq2 group by key
+) src2
+on src1.key = src2.key
+order by src1.key, src1.cnt1, src2.cnt1
+POSTHOOK: type: QUERY
+POSTHOOK: Lineage: tbl1.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl1.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+ABSTRACT SYNTAX TREE:
+ (TOK_QUERY (TOK_FROM (TOK_JOIN (TOK_SUBQUERY (TOK_QUERY (TOK_FROM (TOK_SUBQUERY (TOK_QUERY (TOK_FROM (TOK_JOIN (TOK_TABREF (TOK_TABNAME tbl1) a) (TOK_TABREF (TOK_TABNAME tbl2) b) (= (. (TOK_TABLE_OR_COL a) key) (. (TOK_TABLE_OR_COL b) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_HINTLIST (TOK_HINT TOK_MAPJOIN (TOK_HINTARGLIST a))) (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) key) key) (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) value) val1) (TOK_SELEXPR (. (TOK_TABLE_OR_COL b) value) val2)))) subq1)) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (TOK_TABLE_OR_COL key)) (TOK_SELEXPR (TOK_FUNCTIONSTAR count) cnt1)) (TOK_GROUPBY (TOK_TABLE_OR_COL key)))) src1) (TOK_SUBQUERY (TOK_QUERY (TOK_FROM (TOK_SUBQUERY (TOK_QUERY (TOK_FROM (TOK_JOIN (TOK_TABREF (TOK_TABNAME tbl1) a) (TOK_TABREF (TOK_TABNAME tbl2) b) (= (. (TOK_TABLE_OR_COL a) key) (. (TOK_TABLE_OR_COL b) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_S
ELECT (TOK_HINTLIST (TOK_HINT TOK_MAPJOIN (TOK_HINTARGLIST a))) (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) key) key) (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) value) val1) (TOK_SELEXPR (. (TOK_TABLE_OR_COL b) value) val2)))) subq2)) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (TOK_TABLE_OR_COL key)) (TOK_SELEXPR (TOK_FUNCTIONSTAR count) cnt1)) (TOK_GROUPBY (TOK_TABLE_OR_COL key)))) src2) (= (. (TOK_TABLE_OR_COL src1) key) (. (TOK_TABLE_OR_COL src2) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (. (TOK_TABLE_OR_COL src1) key)) (TOK_SELEXPR (. (TOK_TABLE_OR_COL src1) cnt1)) (TOK_SELEXPR (. (TOK_TABLE_OR_COL src2) cnt1))) (TOK_ORDERBY (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL src1) key)) (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL src1) cnt1)) (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL src2) cnt1)))))
+
+STAGE DEPENDENCIES:
+ Stage-1 is a root stage
+ Stage-2 depends on stages: Stage-1
+ Stage-3 depends on stages: Stage-2, Stage-7
+ Stage-4 depends on stages: Stage-3
+ Stage-6 is a root stage
+ Stage-7 depends on stages: Stage-6
+ Stage-0 is a root stage
+
+STAGE PLANS:
+ Stage: Stage-1
+ Map Reduce
+ Alias -> Map Operator Tree:
+ src1:subq1:b
+ TableScan
+ alias: b
+ Sorted Merge Bucket Map Join Operator
+ condition map:
+ Inner Join 0 to 1
+ condition expressions:
+ 0 {key}
+ 1
+ handleSkewJoin: false
+ keys:
+ 0 [Column[key]]
+ 1 [Column[key]]
+ outputColumnNames: _col0
+ Position of Big Table: 1
+ File Output Operator
+ compressed: false
+ GlobalTableId: 0
+ table:
+ input format: org.apache.hadoop.mapred.SequenceFileInputFormat
+ output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
+
+ Stage: Stage-2
+ Map Reduce
+ Alias -> Map Operator Tree:
+#### A masked pattern was here ####
+ Select Operator
+ expressions:
+ expr: _col0
+ type: int
+ outputColumnNames: _col0
+ Select Operator
+ expressions:
+ expr: _col0
+ type: int
+ outputColumnNames: _col0
+ Select Operator
+ expressions:
+ expr: _col0
+ type: int
+ outputColumnNames: _col0
+ Group By Operator
+ aggregations:
+ expr: count()
+ bucketGroup: false
+ keys:
+ expr: _col0
+ type: int
+ mode: hash
+ outputColumnNames: _col0, _col1
+ Reduce Output Operator
+ key expressions:
+ expr: _col0
+ type: int
+ sort order: +
+ Map-reduce partition columns:
+ expr: _col0
+ type: int
+ tag: -1
+ value expressions:
+ expr: _col1
+ type: bigint
+ Reduce Operator Tree:
+ Group By Operator
+ aggregations:
+ expr: count(VALUE._col0)
+ bucketGroup: false
+ keys:
+ expr: KEY._col0
+ type: int
+ mode: mergepartial
+ outputColumnNames: _col0, _col1
+ Select Operator
+ expressions:
+ expr: _col0
+ type: int
+ expr: _col1
+ type: bigint
+ outputColumnNames: _col0, _col1
+ File Output Operator
+ compressed: false
+ GlobalTableId: 0
+ table:
+ input format: org.apache.hadoop.mapred.SequenceFileInputFormat
+ output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
+
+ Stage: Stage-3
+ Map Reduce
+ Alias -> Map Operator Tree:
+ $INTNAME
+ Reduce Output Operator
+ key expressions:
+ expr: _col0
+ type: int
+ sort order: +
+ Map-reduce partition columns:
+ expr: _col0
+ type: int
+ tag: 0
+ value expressions:
+ expr: _col0
+ type: int
+ expr: _col1
+ type: bigint
+ $INTNAME1
+ Reduce Output Operator
+ key expressions:
+ expr: _col0
+ type: int
+ sort order: +
+ Map-reduce partition columns:
+ expr: _col0
+ type: int
+ tag: 1
+ value expressions:
+ expr: _col1
+ type: bigint
+ Reduce Operator Tree:
+ Join Operator
+ condition map:
+ Inner Join 0 to 1
+ condition expressions:
+ 0 {VALUE._col0} {VALUE._col1}
+ 1 {VALUE._col1}
+ handleSkewJoin: false
+ outputColumnNames: _col0, _col1, _col3
+ Select Operator
+ expressions:
+ expr: _col0
+ type: int
+ expr: _col1
+ type: bigint
+ expr: _col3
+ type: bigint
+ outputColumnNames: _col0, _col1, _col2
+ File Output Operator
+ compressed: false
+ GlobalTableId: 0
+ table:
+ input format: org.apache.hadoop.mapred.SequenceFileInputFormat
+ output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
+
+ Stage: Stage-4
+ Map Reduce
+ Alias -> Map Operator Tree:
+#### A masked pattern was here ####
+ Reduce Output Operator
+ key expressions:
+ expr: _col0
+ type: int
+ expr: _col1
+ type: bigint
+ expr: _col2
+ type: bigint
+ sort order: +++
+ tag: -1
+ value expressions:
+ expr: _col0
+ type: int
+ expr: _col1
+ type: bigint
+ expr: _col2
+ type: bigint
+ Reduce Operator Tree:
+ Extract
+ File Output Operator
+ compressed: false
+ GlobalTableId: 0
+ table:
+ input format: org.apache.hadoop.mapred.TextInputFormat
+ output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
+
+ Stage: Stage-6
+ Map Reduce
+ Alias -> Map Operator Tree:
+ src2:subq2:b
+ TableScan
+ alias: b
+ Sorted Merge Bucket Map Join Operator
+ condition map:
+ Inner Join 0 to 1
+ condition expressions:
+ 0 {key}
+ 1
+ handleSkewJoin: false
+ keys:
+ 0 [Column[key]]
+ 1 [Column[key]]
+ outputColumnNames: _col0
+ Position of Big Table: 1
+ File Output Operator
+ compressed: false
+ GlobalTableId: 0
+ table:
+ input format: org.apache.hadoop.mapred.SequenceFileInputFormat
+ output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
+
+ Stage: Stage-7
+ Map Reduce
+ Alias -> Map Operator Tree:
+#### A masked pattern was here ####
+ Select Operator
+ expressions:
+ expr: _col0
+ type: int
+ outputColumnNames: _col0
+ Select Operator
+ expressions:
+ expr: _col0
+ type: int
+ outputColumnNames: _col0
+ Select Operator
+ expressions:
+ expr: _col0
+ type: int
+ outputColumnNames: _col0
+ Group By Operator
+ aggregations:
+ expr: count()
+ bucketGroup: false
+ keys:
+ expr: _col0
+ type: int
+ mode: hash
+ outputColumnNames: _col0, _col1
+ Reduce Output Operator
+ key expressions:
+ expr: _col0
+ type: int
+ sort order: +
+ Map-reduce partition columns:
+ expr: _col0
+ type: int
+ tag: -1
+ value expressions:
+ expr: _col1
+ type: bigint
+ Reduce Operator Tree:
+ Group By Operator
+ aggregations:
+ expr: count(VALUE._col0)
+ bucketGroup: false
+ keys:
+ expr: KEY._col0
+ type: int
+ mode: mergepartial
+ outputColumnNames: _col0, _col1
+ Select Operator
+ expressions:
+ expr: _col0
+ type: int
+ expr: _col1
+ type: bigint
+ outputColumnNames: _col0, _col1
+ File Output Operator
+ compressed: false
+ GlobalTableId: 0
+ table:
+ input format: org.apache.hadoop.mapred.SequenceFileInputFormat
+ output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
+
+ Stage: Stage-0
+ Fetch Operator
+ limit: -1
+
+
+PREHOOK: query: select src1.key, src1.cnt1, src2.cnt1 from
+(
+ select key, count(*) as cnt1 from
+ (
+ select /*+mapjoin(a)*/ a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+ ) subq1 group by key
+) src1
+join
+(
+ select key, count(*) as cnt1 from
+ (
+ select /*+mapjoin(a)*/ a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+ ) subq2 group by key
+) src2
+on src1.key = src2.key
+order by src1.key, src1.cnt1, src2.cnt1
+PREHOOK: type: QUERY
+PREHOOK: Input: default@tbl1
+PREHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: query: select src1.key, src1.cnt1, src2.cnt1 from
+(
+ select key, count(*) as cnt1 from
+ (
+ select /*+mapjoin(a)*/ a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+ ) subq1 group by key
+) src1
+join
+(
+ select key, count(*) as cnt1 from
+ (
+ select /*+mapjoin(a)*/ a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+ ) subq2 group by key
+) src2
+on src1.key = src2.key
+order by src1.key, src1.cnt1, src2.cnt1
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@tbl1
+POSTHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: Lineage: tbl1.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl1.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+0 9 9
+2 1 1
+4 1 1
+5 9 9
+8 1 1
+9 1 1
+PREHOOK: query: -- The subquery itself is being map-joined. Since the sub-query only contains selects and filters, it should
+-- be converted to a sort-merge join.
+explain
+select /*+mapjoin(subq1)*/ count(*) from
+ (select a.key as key, a.value as value from tbl1 a where key < 6) subq1
+ join
+ (select a.key as key, a.value as value from tbl2 a where key < 6) subq2
+ on subq1.key = subq2.key
+PREHOOK: type: QUERY
+POSTHOOK: query: -- The subquery itself is being map-joined. Since the sub-query only contains selects and filters, it should
+-- be converted to a sort-merge join.
+explain
+select /*+mapjoin(subq1)*/ count(*) from
+ (select a.key as key, a.value as value from tbl1 a where key < 6) subq1
+ join
+ (select a.key as key, a.value as value from tbl2 a where key < 6) subq2
+ on subq1.key = subq2.key
+POSTHOOK: type: QUERY
+POSTHOOK: Lineage: tbl1.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl1.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+ABSTRACT SYNTAX TREE:
+ (TOK_QUERY (TOK_FROM (TOK_JOIN (TOK_SUBQUERY (TOK_QUERY (TOK_FROM (TOK_TABREF (TOK_TABNAME tbl1) a)) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) key) key) (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) value) value)) (TOK_WHERE (< (TOK_TABLE_OR_COL key) 6)))) subq1) (TOK_SUBQUERY (TOK_QUERY (TOK_FROM (TOK_TABREF (TOK_TABNAME tbl2) a)) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) key) key) (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) value) value)) (TOK_WHERE (< (TOK_TABLE_OR_COL key) 6)))) subq2) (= (. (TOK_TABLE_OR_COL subq1) key) (. (TOK_TABLE_OR_COL subq2) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_HINTLIST (TOK_HINT TOK_MAPJOIN (TOK_HINTARGLIST subq1))) (TOK_SELEXPR (TOK_FUNCTIONSTAR count)))))
+
+STAGE DEPENDENCIES:
+ Stage-1 is a root stage
+ Stage-2 depends on stages: Stage-1
+ Stage-0 is a root stage
+
+STAGE PLANS:
+ Stage: Stage-1
+ Map Reduce
+ Alias -> Map Operator Tree:
+ subq2:a
+ TableScan
+ alias: a
+ Filter Operator
+ predicate:
+ expr: (key < 6)
+ type: boolean
+ Select Operator
+ expressions:
+ expr: key
+ type: int
+ outputColumnNames: _col0
+ Sorted Merge Bucket Map Join Operator
+ condition map:
+ Inner Join 0 to 1
+ condition expressions:
+ 0
+ 1
+ handleSkewJoin: false
+ keys:
+ 0 [Column[_col0]]
+ 1 [Column[_col0]]
+ Position of Big Table: 1
+ File Output Operator
+ compressed: false
+ GlobalTableId: 0
+ table:
+ input format: org.apache.hadoop.mapred.SequenceFileInputFormat
+ output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
+
+ Stage: Stage-2
+ Map Reduce
+ Alias -> Map Operator Tree:
+#### A masked pattern was here ####
+ Select Operator
+ Select Operator
+ Group By Operator
+ aggregations:
+ expr: count()
+ bucketGroup: false
+ mode: hash
+ outputColumnNames: _col0
+ Reduce Output Operator
+ sort order:
+ tag: -1
+ value expressions:
+ expr: _col0
+ type: bigint
+ Reduce Operator Tree:
+ Group By Operator
+ aggregations:
+ expr: count(VALUE._col0)
+ bucketGroup: false
+ mode: mergepartial
+ outputColumnNames: _col0
+ Select Operator
+ expressions:
+ expr: _col0
+ type: bigint
+ outputColumnNames: _col0
+ File Output Operator
+ compressed: false
+ GlobalTableId: 0
+ table:
+ input format: org.apache.hadoop.mapred.TextInputFormat
+ output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
+
+ Stage: Stage-0
+ Fetch Operator
+ limit: -1
+
+
+PREHOOK: query: select /*+mapjoin(subq1)*/ count(*) from
+ (select a.key as key, a.value as value from tbl1 a where key < 6) subq1
+ join
+ (select a.key as key, a.value as value from tbl2 a where key < 6) subq2
+ on subq1.key = subq2.key
+PREHOOK: type: QUERY
+PREHOOK: Input: default@tbl1
+PREHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: query: select /*+mapjoin(subq1)*/ count(*) from
+ (select a.key as key, a.value as value from tbl1 a where key < 6) subq1
+ join
+ (select a.key as key, a.value as value from tbl2 a where key < 6) subq2
+ on subq1.key = subq2.key
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@tbl1
+POSTHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: Lineage: tbl1.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl1.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+20
+PREHOOK: query: -- The subquery itself is being map-joined. Since the sub-query only contains selects and filters, it should
+-- be converted to a sort-merge join, although there is more than one level of sub-query
+explain
+select /*+mapjoin(subq2)*/ count(*) from
+ (
+ select * from
+ (
+ select a.key as key, a.value as value from tbl1 a where key < 8
+ ) subq1
+ where key < 6
+ ) subq2
+ join tbl2 b
+ on subq2.key = b.key
+PREHOOK: type: QUERY
+POSTHOOK: query: -- The subquery itself is being map-joined. Since the sub-query only contains selects and filters, it should
+-- be converted to a sort-merge join, although there is more than one level of sub-query
+explain
+select /*+mapjoin(subq2)*/ count(*) from
+ (
+ select * from
+ (
+ select a.key as key, a.value as value from tbl1 a where key < 8
+ ) subq1
+ where key < 6
+ ) subq2
+ join tbl2 b
+ on subq2.key = b.key
+POSTHOOK: type: QUERY
+POSTHOOK: Lineage: tbl1.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl1.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+ABSTRACT SYNTAX TREE:
+ (TOK_QUERY (TOK_FROM (TOK_JOIN (TOK_SUBQUERY (TOK_QUERY (TOK_FROM (TOK_SUBQUERY (TOK_QUERY (TOK_FROM (TOK_TABREF (TOK_TABNAME tbl1) a)) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) key) key) (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) value) value)) (TOK_WHERE (< (TOK_TABLE_OR_COL key) 8)))) subq1)) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR TOK_ALLCOLREF)) (TOK_WHERE (< (TOK_TABLE_OR_COL key) 6)))) subq2) (TOK_TABREF (TOK_TABNAME tbl2) b) (= (. (TOK_TABLE_OR_COL subq2) key) (. (TOK_TABLE_OR_COL b) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_HINTLIST (TOK_HINT TOK_MAPJOIN (TOK_HINTARGLIST subq2))) (TOK_SELEXPR (TOK_FUNCTIONSTAR count)))))
+
+STAGE DEPENDENCIES:
+ Stage-1 is a root stage
+ Stage-2 depends on stages: Stage-1
+ Stage-0 is a root stage
+
+STAGE PLANS:
+ Stage: Stage-1
+ Map Reduce
+ Alias -> Map Operator Tree:
+ b
+ TableScan
+ alias: b
+ Sorted Merge Bucket Map Join Operator
+ condition map:
+ Inner Join 0 to 1
+ condition expressions:
+ 0
+ 1
+ handleSkewJoin: false
+ keys:
+ 0 [Column[_col0]]
+ 1 [Column[key]]
+ Position of Big Table: 1
+ File Output Operator
+ compressed: false
+ GlobalTableId: 0
+ table:
+ input format: org.apache.hadoop.mapred.SequenceFileInputFormat
+ output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
+
+ Stage: Stage-2
+ Map Reduce
+ Alias -> Map Operator Tree:
+#### A masked pattern was here ####
+ Select Operator
+ Select Operator
+ Group By Operator
+ aggregations:
+ expr: count()
+ bucketGroup: false
+ mode: hash
+ outputColumnNames: _col0
+ Reduce Output Operator
+ sort order:
+ tag: -1
+ value expressions:
+ expr: _col0
+ type: bigint
+ Reduce Operator Tree:
+ Group By Operator
+ aggregations:
+ expr: count(VALUE._col0)
+ bucketGroup: false
+ mode: mergepartial
+ outputColumnNames: _col0
+ Select Operator
+ expressions:
+ expr: _col0
+ type: bigint
+ outputColumnNames: _col0
+ File Output Operator
+ compressed: false
+ GlobalTableId: 0
+ table:
+ input format: org.apache.hadoop.mapred.TextInputFormat
+ output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
+
+ Stage: Stage-0
+ Fetch Operator
+ limit: -1
+
+
+PREHOOK: query: select /*+mapjoin(subq2)*/ count(*) from
+ (
+ select * from
+ (
+ select a.key as key, a.value as value from tbl1 a where key < 8
+ ) subq1
+ where key < 6
+ ) subq2
+ join tbl2 b
+ on subq2.key = b.key
+PREHOOK: type: QUERY
+PREHOOK: Input: default@tbl1
+PREHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: query: select /*+mapjoin(subq2)*/ count(*) from
+ (
+ select * from
+ (
+ select a.key as key, a.value as value from tbl1 a where key < 8
+ ) subq1
+ where key < 6
+ ) subq2
+ join tbl2 b
+ on subq2.key = b.key
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@tbl1
+POSTHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: Lineage: tbl1.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl1.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+20
+PREHOOK: query: -- Both the big table and the small table are nested sub-queries i.e more then 1 level of sub-query.
+-- The join should be converted to a sort-merge join
+explain
+select /*+mapjoin(subq2)*/ count(*) from
+ (
+ select * from
+ (
+ select a.key as key, a.value as value from tbl1 a where key < 8
+ ) subq1
+ where key < 6
+ ) subq2
+ join
+ (
+ select * from
+ (
+ select a.key as key, a.value as value from tbl1 a where key < 8
+ ) subq3
+ where key < 6
+ ) subq4
+ on subq2.key = subq4.key
+PREHOOK: type: QUERY
+POSTHOOK: query: -- Both the big table and the small table are nested sub-queries i.e more then 1 level of sub-query.
+-- The join should be converted to a sort-merge join
+explain
+select /*+mapjoin(subq2)*/ count(*) from
+ (
+ select * from
+ (
+ select a.key as key, a.value as value from tbl1 a where key < 8
+ ) subq1
+ where key < 6
+ ) subq2
+ join
+ (
+ select * from
+ (
+ select a.key as key, a.value as value from tbl1 a where key < 8
+ ) subq3
+ where key < 6
+ ) subq4
+ on subq2.key = subq4.key
+POSTHOOK: type: QUERY
+POSTHOOK: Lineage: tbl1.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl1.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+ABSTRACT SYNTAX TREE:
+ (TOK_QUERY (TOK_FROM (TOK_JOIN (TOK_SUBQUERY (TOK_QUERY (TOK_FROM (TOK_SUBQUERY (TOK_QUERY (TOK_FROM (TOK_TABREF (TOK_TABNAME tbl1) a)) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) key) key) (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) value) value)) (TOK_WHERE (< (TOK_TABLE_OR_COL key) 8)))) subq1)) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR TOK_ALLCOLREF)) (TOK_WHERE (< (TOK_TABLE_OR_COL key) 6)))) subq2) (TOK_SUBQUERY (TOK_QUERY (TOK_FROM (TOK_SUBQUERY (TOK_QUERY (TOK_FROM (TOK_TABREF (TOK_TABNAME tbl1) a)) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) key) key) (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) value) value)) (TOK_WHERE (< (TOK_TABLE_OR_COL key) 8)))) subq3)) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR TOK_ALLCOLREF)) (TOK_WHERE (< (TOK_TABLE_OR_COL key) 6)))) subq4) (= (. (TOK_TABLE_OR_COL subq
2) key) (. (TOK_TABLE_OR_COL subq4) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_HINTLIST (TOK_HINT TOK_MAPJOIN (TOK_HINTARGLIST subq2))) (TOK_SELEXPR (TOK_FUNCTIONSTAR count)))))
+
+STAGE DEPENDENCIES:
+ Stage-1 is a root stage
+ Stage-2 depends on stages: Stage-1
+ Stage-0 is a root stage
+
+STAGE PLANS:
+ Stage: Stage-1
+ Map Reduce
+ Alias -> Map Operator Tree:
+ subq4:subq3:a
+ TableScan
+ alias: a
+ Filter Operator
+ predicate:
+ expr: ((key < 8) and (key < 6))
+ type: boolean
+ Select Operator
+ expressions:
+ expr: key
+ type: int
+ outputColumnNames: _col0
+ Select Operator
+ expressions:
+ expr: _col0
+ type: int
+ outputColumnNames: _col0
+ Sorted Merge Bucket Map Join Operator
+ condition map:
+ Inner Join 0 to 1
+ condition expressions:
+ 0
+ 1
+ handleSkewJoin: false
+ keys:
+ 0 [Column[_col0]]
+ 1 [Column[_col0]]
+ Position of Big Table: 1
+ File Output Operator
+ compressed: false
+ GlobalTableId: 0
+ table:
+ input format: org.apache.hadoop.mapred.SequenceFileInputFormat
+ output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
+
+ Stage: Stage-2
+ Map Reduce
+ Alias -> Map Operator Tree:
+#### A masked pattern was here ####
+ Select Operator
+ Select Operator
+ Group By Operator
+ aggregations:
+ expr: count()
+ bucketGroup: false
+ mode: hash
+ outputColumnNames: _col0
+ Reduce Output Operator
+ sort order:
+ tag: -1
+ value expressions:
+ expr: _col0
+ type: bigint
+ Reduce Operator Tree:
+ Group By Operator
+ aggregations:
+ expr: count(VALUE._col0)
+ bucketGroup: false
+ mode: mergepartial
+ outputColumnNames: _col0
+ Select Operator
+ expressions:
+ expr: _col0
+ type: bigint
+ outputColumnNames: _col0
+ File Output Operator
+ compressed: false
+ GlobalTableId: 0
+ table:
+ input format: org.apache.hadoop.mapred.TextInputFormat
+ output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
+
+ Stage: Stage-0
+ Fetch Operator
+ limit: -1
+
+
+PREHOOK: query: select /*+mapjoin(subq2)*/ count(*) from
+ (
+ select * from
+ (
+ select a.key as key, a.value as value from tbl1 a where key < 8
+ ) subq1
+ where key < 6
+ ) subq2
+ join
+ (
+ select * from
+ (
+ select a.key as key, a.value as value from tbl1 a where key < 8
+ ) subq3
+ where key < 6
+ ) subq4
+ on subq2.key = subq4.key
+PREHOOK: type: QUERY
+PREHOOK: Input: default@tbl1
+#### A masked pattern was here ####
+POSTHOOK: query: select /*+mapjoin(subq2)*/ count(*) from
+ (
+ select * from
+ (
+ select a.key as key, a.value as value from tbl1 a where key < 8
+ ) subq1
+ where key < 6
+ ) subq2
+ join
+ (
+ select * from
+ (
+ select a.key as key, a.value as value from tbl1 a where key < 8
+ ) subq3
+ where key < 6
+ ) subq4
+ on subq2.key = subq4.key
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@tbl1
+#### A masked pattern was here ####
+POSTHOOK: Lineage: tbl1.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl1.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+20
+PREHOOK: query: -- The subquery itself is being map-joined. Since the sub-query only contains selects and filters and the join key
+-- is not getting modified, it should be converted to a sort-merge join. Note that the sub-query modifies one
+-- item, but that is not part of the join key.
+explain
+select /*+mapjoin(subq1)*/ count(*) from
+ (select a.key as key, concat(a.value, a.value) as value from tbl1 a where key < 8) subq1
+ join
+ (select a.key as key, concat(a.value, a.value) as value from tbl2 a where key < 8) subq2
+ on subq1.key = subq2.key
+PREHOOK: type: QUERY
+POSTHOOK: query: -- The subquery itself is being map-joined. Since the sub-query only contains selects and filters and the join key
+-- is not getting modified, it should be converted to a sort-merge join. Note that the sub-query modifies one
+-- item, but that is not part of the join key.
+explain
+select /*+mapjoin(subq1)*/ count(*) from
+ (select a.key as key, concat(a.value, a.value) as value from tbl1 a where key < 8) subq1
+ join
+ (select a.key as key, concat(a.value, a.value) as value from tbl2 a where key < 8) subq2
+ on subq1.key = subq2.key
+POSTHOOK: type: QUERY
+POSTHOOK: Lineage: tbl1.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl1.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+ABSTRACT SYNTAX TREE:
+ (TOK_QUERY (TOK_FROM (TOK_JOIN (TOK_SUBQUERY (TOK_QUERY (TOK_FROM (TOK_TABREF (TOK_TABNAME tbl1) a)) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) key) key) (TOK_SELEXPR (TOK_FUNCTION concat (. (TOK_TABLE_OR_COL a) value) (. (TOK_TABLE_OR_COL a) value)) value)) (TOK_WHERE (< (TOK_TABLE_OR_COL key) 8)))) subq1) (TOK_SUBQUERY (TOK_QUERY (TOK_FROM (TOK_TABREF (TOK_TABNAME tbl2) a)) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) key) key) (TOK_SELEXPR (TOK_FUNCTION concat (. (TOK_TABLE_OR_COL a) value) (. (TOK_TABLE_OR_COL a) value)) value)) (TOK_WHERE (< (TOK_TABLE_OR_COL key) 8)))) subq2) (= (. (TOK_TABLE_OR_COL subq1) key) (. (TOK_TABLE_OR_COL subq2) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_HINTLIST (TOK_HINT TOK_MAPJOIN (TOK_HINTARGLIST subq1))) (TOK_SELEXPR (TOK_FUNCTIONSTAR count)))))
+
+STAGE DEPENDENCIES:
+ Stage-1 is a root stage
+ Stage-2 depends on stages: Stage-1
+ Stage-0 is a root stage
+
+STAGE PLANS:
+ Stage: Stage-1
+ Map Reduce
+ Alias -> Map Operator Tree:
+ subq2:a
+ TableScan
+ alias: a
+ Filter Operator
+ predicate:
+ expr: (key < 8)
+ type: boolean
+ Select Operator
+ expressions:
+ expr: key
+ type: int
+ outputColumnNames: _col0
+ Sorted Merge Bucket Map Join Operator
+ condition map:
+ Inner Join 0 to 1
+ condition expressions:
+ 0
+ 1
+ handleSkewJoin: false
+ keys:
+ 0 [Column[_col0]]
+ 1 [Column[_col0]]
+ Position of Big Table: 1
+ File Output Operator
+ compressed: false
+ GlobalTableId: 0
+ table:
+ input format: org.apache.hadoop.mapred.SequenceFileInputFormat
+ output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
+
+ Stage: Stage-2
+ Map Reduce
+ Alias -> Map Operator Tree:
+#### A masked pattern was here ####
+ Select Operator
+ Select Operator
+ Group By Operator
+ aggregations:
+ expr: count()
+ bucketGroup: false
+ mode: hash
+ outputColumnNames: _col0
+ Reduce Output Operator
+ sort order:
+ tag: -1
+ value expressions:
+ expr: _col0
+ type: bigint
+ Reduce Operator Tree:
+ Group By Operator
+ aggregations:
+ expr: count(VALUE._col0)
+ bucketGroup: false
+ mode: mergepartial
+ outputColumnNames: _col0
+ Select Operator
+ expressions:
+ expr: _col0
+ type: bigint
+ outputColumnNames: _col0
+ File Output Operator
+ compressed: false
+ GlobalTableId: 0
+ table:
+ input format: org.apache.hadoop.mapred.TextInputFormat
+ output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
+
+ Stage: Stage-0
+ Fetch Operator
+ limit: -1
+
+
+PREHOOK: query: select /*+mapjoin(subq1)*/ count(*) from
+ (select a.key as key, concat(a.value, a.value) as value from tbl1 a where key < 8) subq1
+ join
+ (select a.key as key, concat(a.value, a.value) as value from tbl2 a where key < 8) subq2
+ on subq1.key = subq2.key
+PREHOOK: type: QUERY
+PREHOOK: Input: default@tbl1
+PREHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: query: select /*+mapjoin(subq1)*/ count(*) from
+ (select a.key as key, concat(a.value, a.value) as value from tbl1 a where key < 8) subq1
+ join
+ (select a.key as key, concat(a.value, a.value) as value from tbl2 a where key < 8) subq2
+ on subq1.key = subq2.key
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@tbl1
+POSTHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: Lineage: tbl1.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl1.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+20
+PREHOOK: query: -- Since the join key is modified by the sub-query, neither sort-merge join not bucketized map-side
+-- join should be performed
+explain
+select /*+mapjoin(subq1)*/ count(*) from
+ (select a.key +1 as key, concat(a.value, a.value) as value from tbl1 a) subq1
+ join
+ (select a.key +1 as key, concat(a.value, a.value) as value from tbl2 a) subq2
+ on subq1.key = subq2.key
+PREHOOK: type: QUERY
+POSTHOOK: query: -- Since the join key is modified by the sub-query, neither sort-merge join not bucketized map-side
+-- join should be performed
+explain
+select /*+mapjoin(subq1)*/ count(*) from
+ (select a.key +1 as key, concat(a.value, a.value) as value from tbl1 a) subq1
+ join
+ (select a.key +1 as key, concat(a.value, a.value) as value from tbl2 a) subq2
+ on subq1.key = subq2.key
+POSTHOOK: type: QUERY
+POSTHOOK: Lineage: tbl1.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl1.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+ABSTRACT SYNTAX TREE:
+ (TOK_QUERY (TOK_FROM (TOK_JOIN (TOK_SUBQUERY (TOK_QUERY (TOK_FROM (TOK_TABREF (TOK_TABNAME tbl1) a)) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (+ (. (TOK_TABLE_OR_COL a) key) 1) key) (TOK_SELEXPR (TOK_FUNCTION concat (. (TOK_TABLE_OR_COL a) value) (. (TOK_TABLE_OR_COL a) value)) value)))) subq1) (TOK_SUBQUERY (TOK_QUERY (TOK_FROM (TOK_TABREF (TOK_TABNAME tbl2) a)) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (+ (. (TOK_TABLE_OR_COL a) key) 1) key) (TOK_SELEXPR (TOK_FUNCTION concat (. (TOK_TABLE_OR_COL a) value) (. (TOK_TABLE_OR_COL a) value)) value)))) subq2) (= (. (TOK_TABLE_OR_COL subq1) key) (. (TOK_TABLE_OR_COL subq2) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_HINTLIST (TOK_HINT TOK_MAPJOIN (TOK_HINTARGLIST subq1))) (TOK_SELEXPR (TOK_FUNCTIONSTAR count)))))
+
+STAGE DEPENDENCIES:
+ Stage-4 is a root stage
+ Stage-1 depends on stages: Stage-4
+ Stage-2 depends on stages: Stage-1
+ Stage-0 is a root stage
+
+STAGE PLANS:
+ Stage: Stage-4
+ Map Reduce Local Work
+ Alias -> Map Local Tables:
+ subq1:a
+ Fetch Operator
+ limit: -1
+ Alias -> Map Local Operator Tree:
+ subq1:a
+ TableScan
+ alias: a
+ Select Operator
+ expressions:
+ expr: (key + 1)
+ type: int
+ outputColumnNames: _col0
+ HashTable Sink Operator
+ condition expressions:
+ 0
+ 1
+ handleSkewJoin: false
+ keys:
+ 0 [Column[_col0]]
+ 1 [Column[_col0]]
+ Position of Big Table: 1
+
+ Stage: Stage-1
+ Map Reduce
+ Alias -> Map Operator Tree:
+ subq2:a
+ TableScan
+ alias: a
+ Select Operator
+ expressions:
+ expr: (key + 1)
+ type: int
+ outputColumnNames: _col0
+ Map Join Operator
+ condition map:
+ Inner Join 0 to 1
+ condition expressions:
+ 0
+ 1
+ handleSkewJoin: false
+ keys:
+ 0 [Column[_col0]]
+ 1 [Column[_col0]]
+ Position of Big Table: 1
+ File Output Operator
+ compressed: false
+ GlobalTableId: 0
+ table:
+ input format: org.apache.hadoop.mapred.SequenceFileInputFormat
+ output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
+ Local Work:
+ Map Reduce Local Work
+
+ Stage: Stage-2
+ Map Reduce
+ Alias -> Map Operator Tree:
+#### A masked pattern was here ####
+ Select Operator
+ Select Operator
+ Group By Operator
+ aggregations:
+ expr: count()
+ bucketGroup: false
+ mode: hash
+ outputColumnNames: _col0
+ Reduce Output Operator
+ sort order:
+ tag: -1
+ value expressions:
+ expr: _col0
+ type: bigint
+ Reduce Operator Tree:
+ Group By Operator
+ aggregations:
+ expr: count(VALUE._col0)
+ bucketGroup: false
+ mode: mergepartial
+ outputColumnNames: _col0
+ Select Operator
+ expressions:
+ expr: _col0
+ type: bigint
+ outputColumnNames: _col0
+ File Output Operator
+ compressed: false
+ GlobalTableId: 0
+ table:
+ input format: org.apache.hadoop.mapred.TextInputFormat
+ output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
+
+ Stage: Stage-0
+ Fetch Operator
+ limit: -1
+
+
+PREHOOK: query: select /*+mapjoin(subq1)*/ count(*) from
+ (select a.key +1 as key, concat(a.value, a.value) as value from tbl1 a) subq1
+ join
+ (select a.key +1 as key, concat(a.value, a.value) as value from tbl2 a) subq2
+ on subq1.key = subq2.key
+PREHOOK: type: QUERY
+PREHOOK: Input: default@tbl1
+PREHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: query: select /*+mapjoin(subq1)*/ count(*) from
+ (select a.key +1 as key, concat(a.value, a.value) as value from tbl1 a) subq1
+ join
+ (select a.key +1 as key, concat(a.value, a.value) as value from tbl2 a) subq2
+ on subq1.key = subq2.key
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@tbl1
+POSTHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: Lineage: tbl1.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl1.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+22
+PREHOOK: query: -- The small table is a sub-query and the big table is not.
+-- It should be converted to a sort-merge join.
+explain
+select /*+mapjoin(subq1)*/ count(*) from
+ (select a.key as key, a.value as value from tbl1 a where key < 6) subq1
+ join tbl2 a on subq1.key = a.key
+PREHOOK: type: QUERY
+POSTHOOK: query: -- The small table is a sub-query and the big table is not.
+-- It should be converted to a sort-merge join.
+explain
+select /*+mapjoin(subq1)*/ count(*) from
+ (select a.key as key, a.value as value from tbl1 a where key < 6) subq1
+ join tbl2 a on subq1.key = a.key
+POSTHOOK: type: QUERY
+POSTHOOK: Lineage: tbl1.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl1.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+ABSTRACT SYNTAX TREE:
+ (TOK_QUERY (TOK_FROM (TOK_JOIN (TOK_SUBQUERY (TOK_QUERY (TOK_FROM (TOK_TABREF (TOK_TABNAME tbl1) a)) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) key) key) (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) value) value)) (TOK_WHERE (< (TOK_TABLE_OR_COL key) 6)))) subq1) (TOK_TABREF (TOK_TABNAME tbl2) a) (= (. (TOK_TABLE_OR_COL subq1) key) (. (TOK_TABLE_OR_COL a) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_HINTLIST (TOK_HINT TOK_MAPJOIN (TOK_HINTARGLIST subq1))) (TOK_SELEXPR (TOK_FUNCTIONSTAR count)))))
+
+STAGE DEPENDENCIES:
+ Stage-1 is a root stage
+ Stage-2 depends on stages: Stage-1
+ Stage-0 is a root stage
+
+STAGE PLANS:
+ Stage: Stage-1
+ Map Reduce
+ Alias -> Map Operator Tree:
+ a
+ TableScan
+ alias: a
+ Sorted Merge Bucket Map Join Operator
+ condition map:
+ Inner Join 0 to 1
+ condition expressions:
+ 0
+ 1
+ handleSkewJoin: false
+ keys:
+ 0 [Column[_col0]]
+ 1 [Column[key]]
+ Position of Big Table: 1
+ File Output Operator
+ compressed: false
+ GlobalTableId: 0
+ table:
+ input format: org.apache.hadoop.mapred.SequenceFileInputFormat
+ output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
+
+ Stage: Stage-2
+ Map Reduce
+ Alias -> Map Operator Tree:
+#### A masked pattern was here ####
+ Select Operator
+ Select Operator
+ Group By Operator
+ aggregations:
+ expr: count()
+ bucketGroup: false
+ mode: hash
+ outputColumnNames: _col0
+ Reduce Output Operator
+ sort order:
+ tag: -1
+ value expressions:
+ expr: _col0
+ type: bigint
+ Reduce Operator Tree:
+ Group By Operator
+ aggregations:
+ expr: count(VALUE._col0)
+ bucketGroup: false
+ mode: mergepartial
+ outputColumnNames: _col0
+ Select Operator
+ expressions:
+ expr: _col0
+ type: bigint
+ outputColumnNames: _col0
+ File Output Operator
+ compressed: false
+ GlobalTableId: 0
+ table:
+ input format: org.apache.hadoop.mapred.TextInputFormat
+ output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
+
+ Stage: Stage-0
+ Fetch Operator
+ limit: -1
+
+
+PREHOOK: query: select /*+mapjoin(subq1)*/ count(*) from
+ (select a.key as key, a.value as value from tbl1 a where key < 6) subq1
+ join tbl2 a on subq1.key = a.key
+PREHOOK: type: QUERY
+PREHOOK: Input: default@tbl1
+PREHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: query: select /*+mapjoin(subq1)*/ count(*) from
+ (select a.key as key, a.value as value from tbl1 a where key < 6) subq1
+ join tbl2 a on subq1.key = a.key
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@tbl1
+POSTHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: Lineage: tbl1.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl1.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+20
+PREHOOK: query: -- The big table is a sub-query and the small table is not.
+-- It should be converted to a sort-merge join.
+explain
+select /*+mapjoin(a)*/ count(*) from
+ (select a.key as key, a.value as value from tbl1 a where key < 6) subq1
+ join tbl2 a on subq1.key = a.key
+PREHOOK: type: QUERY
+POSTHOOK: query: -- The big table is a sub-query and the small table is not.
+-- It should be converted to a sort-merge join.
+explain
+select /*+mapjoin(a)*/ count(*) from
+ (select a.key as key, a.value as value from tbl1 a where key < 6) subq1
+ join tbl2 a on subq1.key = a.key
+POSTHOOK: type: QUERY
+POSTHOOK: Lineage: tbl1.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl1.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+ABSTRACT SYNTAX TREE:
+ (TOK_QUERY (TOK_FROM (TOK_JOIN (TOK_SUBQUERY (TOK_QUERY (TOK_FROM (TOK_TABREF (TOK_TABNAME tbl1) a)) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) key) key) (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) value) value)) (TOK_WHERE (< (TOK_TABLE_OR_COL key) 6)))) subq1) (TOK_TABREF (TOK_TABNAME tbl2) a) (= (. (TOK_TABLE_OR_COL subq1) key) (. (TOK_TABLE_OR_COL a) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_HINTLIST (TOK_HINT TOK_MAPJOIN (TOK_HINTARGLIST a))) (TOK_SELEXPR (TOK_FUNCTIONSTAR count)))))
+
+STAGE DEPENDENCIES:
+ Stage-1 is a root stage
+ Stage-2 depends on stages: Stage-1
+ Stage-0 is a root stage
+
+STAGE PLANS:
+ Stage: Stage-1
+ Map Reduce
+ Alias -> Map Operator Tree:
+ subq1:a
+ TableScan
+ alias: a
+ Filter Operator
+ predicate:
+ expr: (key < 6)
+ type: boolean
+ Select Operator
+ expressions:
+ expr: key
+ type: int
+ outputColumnNames: _col0
+ Sorted Merge Bucket Map Join Operator
+ condition map:
+ Inner Join 0 to 1
+ condition expressions:
+ 0
+ 1
+ handleSkewJoin: false
+ keys:
+ 0 [Column[_col0]]
+ 1 [Column[key]]
+ Position of Big Table: 0
+ File Output Operator
+ compressed: false
+ GlobalTableId: 0
+ table:
+ input format: org.apache.hadoop.mapred.SequenceFileInputFormat
+ output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
+
+ Stage: Stage-2
+ Map Reduce
+ Alias -> Map Operator Tree:
+#### A masked pattern was here ####
+ Select Operator
+ Select Operator
+ Group By Operator
+ aggregations:
+ expr: count()
+ bucketGroup: false
+ mode: hash
+ outputColumnNames: _col0
+ Reduce Output Operator
+ sort order:
+ tag: -1
+ value expressions:
+ expr: _col0
+ type: bigint
+ Reduce Operator Tree:
+ Group By Operator
+ aggregations:
+ expr: count(VALUE._col0)
+ bucketGroup: false
+ mode: mergepartial
+ outputColumnNames: _col0
+ Select Operator
+ expressions:
+ expr: _col0
+ type: bigint
+ outputColumnNames: _col0
+ File Output Operator
+ compressed: false
+ GlobalTableId: 0
+ table:
+ input format: org.apache.hadoop.mapred.TextInputFormat
+ output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
+
+ Stage: Stage-0
+ Fetch Operator
+ limit: -1
+
+
+PREHOOK: query: select /*+mapjoin(a)*/ count(*) from
+ (select a.key as key, a.value as value from tbl1 a where key < 6) subq1
+ join tbl2 a on subq1.key = a.key
+PREHOOK: type: QUERY
+PREHOOK: Input: default@tbl1
+PREHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: query: select /*+mapjoin(a)*/ count(*) from
+ (select a.key as key, a.value as value from tbl1 a where key < 6) subq1
+ join tbl2 a on subq1.key = a.key
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@tbl1
+POSTHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: Lineage: tbl1.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl1.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+20
+PREHOOK: query: -- There are more than 2 inputs to the join, all of them being sub-queries.
+-- It should be converted to to a sort-merge join
+explain
+select /*+mapjoin(subq1, subq2)*/ count(*) from
+ (select a.key as key, a.value as value from tbl1 a where key < 6) subq1
+ join
+ (select a.key as key, a.value as value from tbl2 a where key < 6) subq2
+ on (subq1.key = subq2.key)
+ join
+ (select a.key as key, a.value as value from tbl2 a where key < 6) subq3
+ on (subq1.key = subq3.key)
+PREHOOK: type: QUERY
+POSTHOOK: query: -- There are more than 2 inputs to the join, all of them being sub-queries.
+-- It should be converted to to a sort-merge join
+explain
+select /*+mapjoin(subq1, subq2)*/ count(*) from
+ (select a.key as key, a.value as value from tbl1 a where key < 6) subq1
+ join
+ (select a.key as key, a.value as value from tbl2 a where key < 6) subq2
+ on (subq1.key = subq2.key)
+ join
+ (select a.key as key, a.value as value from tbl2 a where key < 6) subq3
+ on (subq1.key = subq3.key)
+POSTHOOK: type: QUERY
+POSTHOOK: Lineage: tbl1.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl1.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+ABSTRACT SYNTAX TREE:
+ (TOK_QUERY (TOK_FROM (TOK_JOIN (TOK_JOIN (TOK_SUBQUERY (TOK_QUERY (TOK_FROM (TOK_TABREF (TOK_TABNAME tbl1) a)) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) key) key) (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) value) value)) (TOK_WHERE (< (TOK_TABLE_OR_COL key) 6)))) subq1) (TOK_SUBQUERY (TOK_QUERY (TOK_FROM (TOK_TABREF (TOK_TABNAME tbl2) a)) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) key) key) (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) value) value)) (TOK_WHERE (< (TOK_TABLE_OR_COL key) 6)))) subq2) (= (. (TOK_TABLE_OR_COL subq1) key) (. (TOK_TABLE_OR_COL subq2) key))) (TOK_SUBQUERY (TOK_QUERY (TOK_FROM (TOK_TABREF (TOK_TABNAME tbl2) a)) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) key) key) (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) value) value)) (TOK_WHERE (< (TOK_TABLE_OR_COL key) 6)))) subq3) (= (. (TOK_TABLE_OR_COL
subq1) key) (. (TOK_TABLE_OR_COL subq3) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_HINTLIST (TOK_HINT TOK_MAPJOIN (TOK_HINTARGLIST subq1 subq2))) (TOK_SELEXPR (TOK_FUNCTIONSTAR count)))))
+
+STAGE DEPENDENCIES:
+ Stage-1 is a root stage
+ Stage-2 depends on stages: Stage-1
+ Stage-0 is a root stage
+
+STAGE PLANS:
+ Stage: Stage-1
+ Map Reduce
+ Alias -> Map Operator Tree:
+ subq3:a
+ TableScan
+ alias: a
+ Filter Operator
+ predicate:
+ expr: (key < 6)
+ type: boolean
+ Select Operator
+ expressions:
+ expr: key
+ type: int
+ outputColumnNames: _col0
+ Sorted Merge Bucket Map Join Operator
+ condition map:
+ Inner Join 0 to 1
+ Inner Join 0 to 2
+ condition expressions:
+ 0
+ 1
+ 2
+ handleSkewJoin: false
+ keys:
+ 0 [Column[_col0]]
+ 1 [Column[_col0]]
+ 2 [Column[_col0]]
+ Position of Big Table: 2
+ File Output Operator
+ compressed: false
+ GlobalTableId: 0
+ table:
+ input format: org.apache.hadoop.mapred.SequenceFileInputFormat
+ output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
+
+ Stage: Stage-2
+ Map Reduce
+ Alias -> Map Operator Tree:
+#### A masked pattern was here ####
+ Select Operator
+ Select Operator
+ Group By Operator
+ aggregations:
+ expr: count()
+ bucketGroup: false
+ mode: hash
+ outputColumnNames: _col0
+ Reduce Output Operator
+ sort order:
+ tag: -1
+ value expressions:
+ expr: _col0
+ type: bigint
+ Reduce Operator Tree:
+ Group By Operator
+ aggregations:
+ expr: count(VALUE._col0)
+ bucketGroup: false
+ mode: mergepartial
+ outputColumnNames: _col0
+ Select Operator
+ expressions:
+ expr: _col0
+ type: bigint
+ outputColumnNames: _col0
+ File Output Operator
+ compressed: false
+ GlobalTableId: 0
+ table:
+ input format: org.apache.hadoop.mapred.TextInputFormat
+ output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
+
+ Stage: Stage-0
+ Fetch Operator
+ limit: -1
+
+
+PREHOOK: query: select /*+mapjoin(subq1, subq2)*/ count(*) from
+ (select a.key as key, a.value as value from tbl1 a where key < 6) subq1
+ join
+ (select a.key as key, a.value as value from tbl2 a where key < 6) subq2
+ on subq1.key = subq2.key
+ join
+ (select a.key as key, a.value as value from tbl2 a where key < 6) subq3
+ on (subq1.key = subq3.key)
+PREHOOK: type: QUERY
+PREHOOK: Input: default@tbl1
+PREHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: query: select /*+mapjoin(subq1, subq2)*/ count(*) from
+ (select a.key as key, a.value as value from tbl1 a where key < 6) subq1
+ join
+ (select a.key as key, a.value as value from tbl2 a where key < 6) subq2
+ on subq1.key = subq2.key
+ join
+ (select a.key as key, a.value as value from tbl2 a where key < 6) subq3
+ on (subq1.key = subq3.key)
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@tbl1
+POSTHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: Lineage: tbl1.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl1.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+56
+PREHOOK: query: -- The mapjoin is being performed on a nested sub-query, and an aggregation is performed after that.
+-- The join should be converted to a sort-merge join
+explain
+select count(*) from (
+ select /*+mapjoin(subq2)*/ subq2.key as key, subq2.value as value1, b.value as value2 from
+ (
+ select * from
+ (
+ select a.key as key, a.value as value from tbl1 a where key < 8
+ ) subq1
+ where key < 6
+ ) subq2
+join tbl2 b
+on subq2.key = b.key) a
+PREHOOK: type: QUERY
+POSTHOOK: query: -- The mapjoin is being performed on a nested sub-query, and an aggregation is performed after that.
+-- The join should be converted to a sort-merge join
+explain
+select count(*) from (
+ select /*+mapjoin(subq2)*/ subq2.key as key, subq2.value as value1, b.value as value2 from
+ (
+ select * from
+ (
+ select a.key as key, a.value as value from tbl1 a where key < 8
+ ) subq1
+ where key < 6
+ ) subq2
+join tbl2 b
+on subq2.key = b.key) a
+POSTHOOK: type: QUERY
+POSTHOOK: Lineage: tbl1.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl1.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+ABSTRACT SYNTAX TREE:
+ (TOK_QUERY (TOK_FROM (TOK_SUBQUERY (TOK_QUERY (TOK_FROM (TOK_JOIN (TOK_SUBQUERY (TOK_QUERY (TOK_FROM (TOK_SUBQUERY (TOK_QUERY (TOK_FROM (TOK_TABREF (TOK_TABNAME tbl1) a)) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) key) key) (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) value) value)) (TOK_WHERE (< (TOK_TABLE_OR_COL key) 8)))) subq1)) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR TOK_ALLCOLREF)) (TOK_WHERE (< (TOK_TABLE_OR_COL key) 6)))) subq2) (TOK_TABREF (TOK_TABNAME tbl2) b) (= (. (TOK_TABLE_OR_COL subq2) key) (. (TOK_TABLE_OR_COL b) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_HINTLIST (TOK_HINT TOK_MAPJOIN (TOK_HINTARGLIST subq2))) (TOK_SELEXPR (. (TOK_TABLE_OR_COL subq2) key) key) (TOK_SELEXPR (. (TOK_TABLE_OR_COL subq2) value) value1) (TOK_SELEXPR (. (TOK_TABLE_OR_COL b) value) value2)))) a)) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELE
CT (TOK_SELEXPR (TOK_FUNCTIONSTAR count)))))
+
+STAGE DEPENDENCIES:
+ Stage-1 is a root stage
+ Stage-2 depends on stages: Stage-1
+ Stage-0 is a root stage
+
+STAGE PLANS:
+ Stage: Stage-1
+ Map Reduce
+ Alias -> Map Operator Tree:
+ a:b
+ TableScan
+ alias: b
+ Sorted Merge Bucket Map Join Operator
+ condition map:
+ Inner Join 0 to 1
+ condition expressions:
+ 0
+ 1
+ handleSkewJoin: false
+ keys:
+ 0 [Column[_col0]]
+ 1 [Column[key]]
+ Position of Big Table: 1
+ File Output Operator
+ compressed: false
+ GlobalTableId: 0
+ table:
+ input format: org.apache.hadoop.mapred.SequenceFileInputFormat
+ output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
+
+ Stage: Stage-2
+ Map Reduce
+ Alias -> Map Operator Tree:
+#### A masked pattern was here ####
+ Select Operator
+ Select Operator
+ Select Operator
+ Group By Operator
+ aggregations:
+ expr: count()
+ bucketGroup: false
+ mode: hash
+ outputColumnNames: _col0
+ Reduce Output Operator
+ sort order:
+ tag: -1
+ value expressions:
+ expr: _col0
+ type: bigint
+ Reduce Operator Tree:
+ Group By Operator
+ aggregations:
+ expr: count(VALUE._col0)
+ bucketGroup: false
+ mode: mergepartial
+ outputColumnNames: _col0
+ Select Operator
+ expressions:
+ expr: _col0
+ type: bigint
+ outputColumnNames: _col0
+ File Output Operator
+ compressed: false
+ GlobalTableId: 0
+ table:
+ input format: org.apache.hadoop.mapred.TextInputFormat
+ output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
+
+ Stage: Stage-0
+ Fetch Operator
+ limit: -1
+
+
+PREHOOK: query: select count(*) from (
+ select /*+mapjoin(subq2)*/ subq2.key as key, subq2.value as value1, b.value as value2 from
+ (
+ select * from
+ (
+ select a.key as key, a.value as value from tbl1 a where key < 8
+ ) subq1
+ where key < 6
+ ) subq2

[... 27 lines stripped ...]

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groupcommits @
categorieshive, hadoop
postedDec 19, '12 at 1:21a
activeDec 19, '12 at 1:21a
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