43 lines
1.3 KiB
SQL
43 lines
1.3 KiB
SQL
# name: test/optimizer/statistics/statistics_join_multicolumn.test
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# description: Statistics propagation through joins on multiple columns
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# group: [statistics]
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statement ok
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CREATE TABLE integers AS SELECT * FROM (VALUES (1), (2), (10)) tbl(i);
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statement ok
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CREATE TABLE integers2 AS SELECT * FROM (VALUES (2, 5), (3, 6), (4, 7)) tbl(i, j);
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statement ok
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PRAGMA explain_output = OPTIMIZED_ONLY;
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# inner join
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# integers.i has [1, 10] as min max
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# integers2.i is [2, 4], integers2.j [5, 7]
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# we compare integers.i = integers2.i AND integers.i = integers2.j
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# these sets are disjoint, so we get an empty result
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query II
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EXPLAIN SELECT i1.i FROM integers i1 JOIN integers2 i2 ON (i1.i=i2.i AND i1.i=i2.j);
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----
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logical_opt <REGEX>:.*EMPTY_RESULT.*
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query II
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EXPLAIN SELECT i1.i FROM integers i1 JOIN integers2 i2 ON (i1.i=i2.i AND i1.i>i2.j);
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----
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logical_opt <REGEX>:.*EMPTY_RESULT.*
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# when we do i1.i < i2.j, the sets are no longer disjoint, because the set [2, 4] is smaller than the set [5, 7]
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query II
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EXPLAIN SELECT i1.i FROM integers i1 JOIN integers2 i2 ON (i1.i=i2.i AND i1.i<i2.j);
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----
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logical_opt <!REGEX>:.*EMPTY_RESULT.*
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query I
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SELECT i1.i FROM integers i1 JOIN integers2 i2 ON (i1.i=i2.i AND i1.i=i2.j);
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----
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query I
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SELECT i1.i FROM integers i1 JOIN integers2 i2 ON (i1.i=i2.i AND i1.i<i2.j);
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----
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2
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