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baf81dea6d
When doing constant propagation the source type was not being propagated to the target expression leading to an analysis failure. The behavior is most easily reproducible with STRING to TIMESTAMP conversion in the presence of other predicates. This patch fixes this by adding an implicit cast if needed for such cases. Testing: - Added planner test and ran other planner tests - Added end-to-end test Change-Id: Ic3853478945229440f733c256ea225639f9178ff Reviewed-on: http://gerrit.cloudera.org:8080/17064 Reviewed-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com> Tested-by: Aman Sinha <amsinha@cloudera.com>
65 lines
1.6 KiB
Plaintext
65 lines
1.6 KiB
Plaintext
====
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---- QUERY
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# Constant propagation for range predicates on timestamp.
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select count(*), sum(int_col) from alltypes_date_partition
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where date_col = cast(timestamp_col as date)
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and timestamp_col between '2009-01-01' and '2009-02-01';
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---- RESULTS
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156,620
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---- TYPES
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BIGINT, BIGINT
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====
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---- QUERY
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# Mix of various predicates some of which are eligible for propagation
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with dp_view as
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(select * from alltypes_date_partition
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where date_col = cast(timestamp_col as date))
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select count(*), sum(int_col) from dp_view
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where int_col < 100 and timestamp_col >= '2009-01-01'
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and bigint_col in (20, 40)
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and timestamp_col <= '2009-02-01';
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---- RESULTS
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62,186
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---- TYPES
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BIGINT, BIGINT
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====
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---- QUERY
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# IMPALA-10314
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# Simple limit in outer query referencing a with clause subquery.
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# WHERE clause has an always_true hint.
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set optimize_simple_limit=true;
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with dp_view as
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(select * from alltypes_date_partition_2
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where /* +always_true */ date_col = cast(timestamp_col as date))
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select count(*) from (select * from dp_view limit 10) t;
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---- RESULTS
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10
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---- TYPES
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BIGINT
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====
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---- QUERY
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# IMPALA-10360
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# Query against a view that has hints for table sampling
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# and WHERE clause.
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set optimize_simple_limit=true;
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select count(*) from (select * from alltypes_dp_2_view_2 limit 10) t;
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---- RESULTS
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10
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---- TYPES
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BIGINT
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====
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---- QUERY
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# IMPALA-9745
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# Test correctness of constant propagation in the presence of
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# implicit casts
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select * from
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(select o_orderdate, to_timestamp(o_orderdate, 'yyyy-MM-dd') ts
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from tpch.orders) dt where ts = '1996-12-01' and o_orderdate = ts
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limit 2;
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---- RESULTS
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'1996-12-01',1996-12-01 00:00:00
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'1996-12-01',1996-12-01 00:00:00
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---- TYPES
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STRING,TIMESTAMP
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====
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