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Merge pull request #71878 from ClickHouse/backport/24.9/71679

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Backport #71679 to 24.9: Fix LOGICAL_ERROR when doing ALTER with empty tuple
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Nikita Mikhaylov 2024-11-18 11:51:51 +01:00 committed by GitHub
commit 9a816c73dd
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4 changed files with 18 additions and 0 deletions
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3
src/Functions/FunctionsComparison.h
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@ -1048,6 +1048,9 @@ private:
size_t tuple_size,
size_t input_rows_count) const
{
if (0 == tuple_size)
throw Exception(ErrorCodes::NOT_IMPLEMENTED, "Comparison of zero-sized tuples is not implemented");
ColumnsWithTypeAndName less_columns(tuple_size);
ColumnsWithTypeAndName equal_columns(tuple_size - 1);
ColumnsWithTypeAndName tmp_columns(2);

3
src/Functions/if.cpp
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@ -668,6 +668,9 @@ private:
temporary_columns[0] = arguments[0];
size_t tuple_size = type1.getElements().size();
if (tuple_size == 0)
return ColumnTuple::create(input_rows_count);
Columns tuple_columns(tuple_size);
for (size_t i = 0; i < tuple_size; ++i)

1
tests/queries/0_stateless/03268_empty_tuple_update.reference Normal file
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@ -0,0 +1 @@
() 2

11
tests/queries/0_stateless/03268_empty_tuple_update.sql Normal file
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@ -0,0 +1,11 @@
DROP TABLE IF EXISTS t0;
CREATE TABLE t0 (c0 Tuple(), c1 int) ENGINE = Memory();
INSERT INTO t0 VALUES ((), 1);
ALTER TABLE t0 UPDATE c0 = (), c1 = 2 WHERE EXISTS (SELECT 1);
SELECT * FROM t0;
DROP TABLE t0;