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Example: WITH t(c1, c2) AS (SELECT int_col, bool_col FROM functional.alltypes) SELECT * FROM t This will create a local view with the 'int_col' and 'bool_col' columns labeled as 'c1' and 'c2'. If the number of labels is less than the number of columns, then the remaining columns in the local view will be labeled as the corresponding columns in the query statement. Therefore, this is also a valid query (only 'int_col' will be labeled as 'c1'): WITH t(c1) AS (SELECT int_col, bool_col FROM functional.alltypes) SELECT * FROM t Change-Id: Ie3a559ca9eaf95c6980c5695a49f02010c42899b Reviewed-on: http://gerrit.cloudera.org:8080/717 Reviewed-by: Vlad Berindei <vlad.berindei@cloudera.com> Tested-by: Internal Jenkins
163 lines
3.7 KiB
Plaintext
163 lines
3.7 KiB
Plaintext
====
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---- QUERY
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# Basic test with a single with-clause view.
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with t as (select int_col x, bigint_col y from functional.alltypestiny)
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select count(x), count(y) from t
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---- RESULTS
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8,8
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---- TYPES
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BIGINT, BIGINT
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====
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---- QUERY
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# Basic test with a single with-clause view that references a virtual view.
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with t as (select abc x, xyz y from functional.complex_view)
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select x, y from t order by y limit 10
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---- RESULTS
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2,'0'
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2,'1'
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---- TYPES
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BIGINT, STRING
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====
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---- QUERY
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# Basic tests with a single with-clause view with column labels.
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with t(c1, c2) as (select int_col, bigint_col y from functional.alltypestiny)
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select * from t limit 1
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---- RESULTS
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0,0
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---- TYPES
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INT, BIGINT
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---- LABELS
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C1, C2
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====
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---- QUERY
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with t(c1) as (select int_col, bigint_col from functional.alltypestiny)
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select * from t limit 1
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---- RESULTS
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0,0
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---- TYPES
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INT, BIGINT
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---- LABELS
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C1, BIGINT_COL
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====
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---- QUERY
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with t(c1, c2) as (select int_col from functional.alltypestiny)
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select * from t limit 1
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---- CATCH
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AnalysisException: WITH-clause view 't' returns 1 columns, but 2 labels were specified.
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====
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---- QUERY
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# Multiple views in with-clause. Only one view is used.
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with t1 as (select int_col x, bigint_col y from functional.alltypestiny),
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t2 as (select 1 x, 10 y), t3 as (values(2 x, 20 y), (3, 30))
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select x, y from t2
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---- RESULTS
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1,10
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---- TYPES
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TINYINT, TINYINT
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====
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---- QUERY
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# Multiple views in with-clause. All views are used in a union.
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with t1 as (select int_col x, bigint_col y from functional.alltypestiny),
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t2 as (select 1 x, 10 y), t3 as (values(2 x, 20 y), (3, 30))
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select * from t1 union all select * from t2 union all (select * from t3) order by x limit 20
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---- RESULTS
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0,0
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0,0
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0,0
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0,0
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1,10
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1,10
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1,10
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1,10
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1,10
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2,20
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3,30
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---- TYPES
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INT, BIGINT
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====
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---- QUERY
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with t1(c1, c2) as (select int_col x, bigint_col y from functional.alltypestiny),
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t2(c3, c4) as (select 1 x, 10 y)
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select * from t1 limit 1 union all select * from t2 limit 1
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---- RESULTS
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0,0
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1,10
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---- TYPES
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INT, BIGINT
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---- LABELS
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C1, C2
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====
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---- QUERY
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# Multiple views in with-clause. All views are used in a join.
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with t1 as (select int_col x, bigint_col y from functional.alltypes limit 2),
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t2 as (select int_col x, bigint_col y from functional.alltypestiny limit 2),
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t3 as (select int_col x, bigint_col y from functional.alltypessmall limit 2)
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select * from t1, t2, t3 where t1.x = t2.x and t2.x = t3.x
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---- RESULTS
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0,0,0,0,0,0
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1,10,1,10,1,10
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---- TYPES
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INT, BIGINT, INT, BIGINT, INT, BIGINT
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====
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---- QUERY
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# Self-join of with-clause table to make sure the join op is properly set
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# in the cloned inline-view instances.
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with t as (select int_col x, bigint_col y from functional.alltypestiny order by id limit 2)
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select * from t t1 left outer join t t2 on t1.y = t2.x full outer join t t3 on t2.y = t3.x
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order by t1.x limit 10
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---- RESULTS
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0,0,0,0,0,0
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1,10,NULL,NULL,NULL,NULL
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NULL,NULL,NULL,NULL,1,10
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---- TYPES
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INT, BIGINT, INT, BIGINT, INT, BIGINT
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====
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---- QUERY
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# Multiple with clauses. One for the UnionStmt and one for each union operand.
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with t1 as (values('a', 'b'))
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(with t2 as (values('c', 'd')) select * from t2) union all
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(with t3 as (values('e', 'f')) select * from t3)
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---- RESULTS
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'e','f'
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'c','d'
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---- TYPES
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STRING, STRING
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====
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---- QUERY
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# With clause containing an order by element that should be cloned properly.
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with t1 as (select tinyint_col, count(*) from alltypesagg group by 1
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order by 1 desc nulls last limit 10) select * from t1;
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---- RESULTS
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9,1000
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8,1000
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7,1000
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6,1000
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5,1000
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4,1000
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3,1000
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2,1000
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1,1000
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NULL,2000
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---- TYPES
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TINYINT, BIGINT
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====
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---- QUERY
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# IMPALA-1357: Analysis of WithClause pollutes global state
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select 1 from (
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with w as (
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select 1 from alltypestiny
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where exists (select 1 from alltypestiny))
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select 1 from w) tt
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---- RESULTS
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1
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1
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1
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1
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1
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1
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1
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1
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---- TYPES
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TINYINT
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====
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