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55 lines
1.5 KiB
C++
55 lines
1.5 KiB
C++
#include <Interpreters/castColumn.h>
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#include <Functions/FunctionsConversion.h>
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#include <Functions/CastOverloadResolver.h>
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namespace DB
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{
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template <CastType cast_type = CastType::nonAccurate>
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static ColumnPtr castColumn(const ColumnWithTypeAndName & arg, const DataTypePtr & type)
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{
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if (arg.type->equals(*type) && cast_type != CastType::accurateOrNull)
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return arg.column;
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ColumnsWithTypeAndName arguments
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{
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arg,
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{
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DataTypeString().createColumnConst(arg.column->size(), type->getName()),
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std::make_shared<DataTypeString>(),
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""
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}
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};
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FunctionOverloadResolverPtr func_builder_cast = CastInternalOverloadResolver<cast_type>::createImpl();
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auto func_cast = func_builder_cast->build(arguments);
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if constexpr (cast_type == CastType::accurateOrNull)
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{
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return func_cast->execute(arguments, makeNullable(type), arg.column->size());
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}
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else
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{
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return func_cast->execute(arguments, type, arg.column->size());
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}
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}
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ColumnPtr castColumn(const ColumnWithTypeAndName & arg, const DataTypePtr & type)
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{
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return castColumn<CastType::nonAccurate>(arg, type);
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}
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ColumnPtr castColumnAccurate(const ColumnWithTypeAndName & arg, const DataTypePtr & type)
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{
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return castColumn<CastType::accurate>(arg, type);
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}
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ColumnPtr castColumnAccurateOrNull(const ColumnWithTypeAndName & arg, const DataTypePtr & type)
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{
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return castColumn<CastType::accurateOrNull>(arg, type);
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}
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}
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