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42 lines
1.1 KiB
C++
42 lines
1.1 KiB
C++
#pragma once
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#include <Columns/IColumn.h>
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#include <DataTypes/IDataType.h>
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namespace DB
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{
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class WriteBuffer;
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/** Column data along with its data type and name.
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* Column data could be nullptr - to represent just 'header' of column.
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* Name could be either name from a table or some temporary generated name during expression evaluation.
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*/
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wnull-dereference"
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struct ColumnWithTypeAndName
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{
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ColumnPtr column;
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DataTypePtr type;
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String name;
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ColumnWithTypeAndName() {}
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ColumnWithTypeAndName(const ColumnPtr & column_, const DataTypePtr & type_, const String & name_)
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: column(column_), type(type_), name(name_) {}
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/// Uses type->createColumn() to create column
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ColumnWithTypeAndName(const DataTypePtr & type_, const String & name_)
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: column(type_->createColumn()), type(type_), name(name_) {}
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ColumnWithTypeAndName cloneEmpty() const;
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bool operator==(const ColumnWithTypeAndName & other) const;
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void dumpStructure(WriteBuffer & out) const;
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String dumpStructure() const;
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};
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#pragma GCC diagnostic pop
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}
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