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Fix issue #7834

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This commit is contained in:
Alexey Milovidov 2021-05-04 02:27:05 +03:00
parent 052b532025
commit aa9a367d45
1 changed files with 13 additions and 9 deletions
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22
src/Interpreters/convertFieldToType.cpp
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@ -14,13 +14,13 @@
#include <DataTypes/DataTypeDateTime.h>
#include <DataTypes/DataTypeDateTime64.h>
#include <DataTypes/DataTypeEnum.h>
#include <DataTypes/DataTypeUUID.h>
#include <DataTypes/DataTypeLowCardinality.h>
#include <DataTypes/DataTypeNullable.h>
#include <Core/AccurateComparison.h>
#include <Common/typeid_cast.h>
#include <Common/NaNUtils.h>
#include <DataTypes/DataTypeUUID.h>
#include <DataTypes/DataTypeLowCardinality.h>
#include <common/DateLUT.h>
#include <DataTypes/DataTypeAggregateFunction.h>
@ -141,7 +141,6 @@ static Field convertDecimalType(const Field & from, const To & type)
Field convertFieldToTypeImpl(const Field & src, const IDataType & type, const IDataType * from_type_hint)
{
// This was added to mitigate converting DateTime64-Field (a typedef to a Decimal64) to DataTypeDate64-compatible type.
if (from_type_hint && from_type_hint->equals(type))
{
return src;
@ -149,6 +148,7 @@ Field convertFieldToTypeImpl(const Field & src, const IDataType & type, const ID
WhichDataType which_type(type);
WhichDataType which_from_type;
if (from_type_hint)
{
which_from_type = WhichDataType(*from_type_hint);
@ -195,12 +195,6 @@ Field convertFieldToTypeImpl(const Field & src, const IDataType & type, const ID
return src;
}
if (which_type.isUUID() && src.getType() == Field::Types::UInt128)
{
/// Already in needed type.
return src;
}
if (which_type.isDateTime64() && src.getType() == Field::Types::Decimal64)
{
/// Already in needed type.
@ -209,6 +203,11 @@ Field convertFieldToTypeImpl(const Field & src, const IDataType & type, const ID
/// TODO Conversion from integers to DateTime64
}
else if (which_type.isUUID() && src.getType() == Field::Types::UUID)
{
/// Already in needed type.
return src;
}
else if (which_type.isStringOrFixedString())
{
if (src.getType() == Field::Types::String)
@ -380,6 +379,7 @@ Field convertFieldToTypeImpl(const Field & src, const IDataType & type, const ID
}
Field convertFieldToType(const Field & from_value, const IDataType & to_type, const IDataType * from_type_hint)
{
if (from_value.isNull())
@ -406,18 +406,22 @@ Field convertFieldToType(const Field & from_value, const IDataType & to_type, co
return convertFieldToTypeImpl(from_value, to_type, from_type_hint);
}
Field convertFieldToTypeOrThrow(const Field & from_value, const IDataType & to_type, const IDataType * from_type_hint)
{
bool is_null = from_value.isNull();
if (is_null && !to_type.isNullable())
throw Exception(ErrorCodes::TYPE_MISMATCH, "Cannot convert NULL to {}", to_type.getName());
Field converted = convertFieldToType(from_value, to_type, from_type_hint);
if (!is_null && converted.isNull())
throw Exception(ErrorCodes::ARGUMENT_OUT_OF_BOUND,
"Cannot convert value '{}'{}: it cannot be represented as {}",
toString(from_value),
from_type_hint ? " from " + from_type_hint->getName() : "",
to_type.getName());
return converted;
}