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disallow LowCardinality input type for JSONExtract

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Workaraund for a memory corruption issue
https://github.com/ClickHouse/ClickHouse/issues/61562

It seems that the root cause lies not within the parser itself,
but rather either with the
Columns/ColumnLowCardinality or Functions/IFunction code paths.
This commit is contained in:
Julia Kartseva 2024-03-19 23:43:01 +00:00
parent a31cf43499
commit dcaa712451
3 changed files with 4 additions and 3 deletions
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4
src/Functions/FunctionsJSON.h
View File

@ -348,6 +348,7 @@ public:
String getName() const override { return Name::name; }
bool useDefaultImplementationForNulls() const override { return false; }
bool useDefaultImplementationForConstants() const override { return true; }
bool useDefaultImplementationForLowCardinalityColumns() const override { return false; }
ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr & result_type, size_t input_rows_count) const override
{
@ -469,9 +470,6 @@ public:
else
return_type = json_return_type;
/// Top-level LowCardinality columns are processed outside JSON parser.
json_return_type = removeLowCardinality(json_return_type);
DataTypes argument_types;
argument_types.reserve(arguments.size());
for (const auto & argument : arguments)

1
tests/queries/0_stateless/00918_json_functions.reference
View File

@ -69,6 +69,7 @@ hello
(3333.6,'test')
(3333.6333333333,'test')
(3333.6333333333,'test')
\N
123456.1234 Decimal(20, 4)
123456.1234 Decimal(20, 4)
123456789012345.12 Decimal(30, 4)

2
tests/queries/0_stateless/00918_json_functions.sql
View File

@ -81,6 +81,7 @@ SELECT JSONExtract('{"a":3333.6333333333333333333333, "b":"test"}', 'Tuple(a Dec
SELECT JSONExtract('{"a":"3333.6333333333333333333333", "b":"test"}', 'Tuple(a Decimal(10,1), b LowCardinality(String))');
SELECT JSONExtract('{"a":3333.6333333333333333333333, "b":"test"}', 'Tuple(a Decimal(20,10), b LowCardinality(String))');
SELECT JSONExtract('{"a":"3333.6333333333333333333333", "b":"test"}', 'Tuple(a Decimal(20,10), b LowCardinality(String))');
SELECT JSONExtract(materialize('{"string_value":null}'), materialize('string_value'), 'LowCardinality(Nullable(String))');
SELECT JSONExtract('{"a":123456.123456}', 'a', 'Decimal(20, 4)') as a, toTypeName(a);
SELECT JSONExtract('{"a":"123456.123456"}', 'a', 'Decimal(20, 4)') as a, toTypeName(a);
SELECT JSONExtract('{"a":"123456789012345.12"}', 'a', 'Decimal(30, 4)') as a, toTypeName(a);
@ -326,3 +327,4 @@ SELECT JSONExtract('[]', JSONExtract('0', 'UInt256'), 'UInt256'); -- { serverErr
SELECT '--show error: key of map type should be String';
SELECT JSONExtract('{"a": [100.0, 200], "b": [-100, 200.0, 300]}', 'Map(Int64, Array(Float64))'); -- { serverError ILLEGAL_TYPE_OF_ARGUMENT }
SELECT JSONExtract(materialize(toLowCardinality('{"string_value":null}')), materialize('string_value'), 'LowCardinality(Nullable(String))'); -- {serverError ILLEGAL_TYPE_OF_ARGUMENT }