ClickHouse/src/Interpreters/addMissingDefaults.h
2020-05-16 00:00:38 +03:00

28 lines
763 B
C++

#pragma once
#include <unordered_map>
#include <string>
namespace DB
{
class Block;
class Context;
class NamesAndTypesList;
struct ColumnDefault;
/** Adds three types of columns into block
* 1. Columns, that are missed inside request, but present in table without defaults (missed columns)
* 2. Columns, that are missed inside request, but present in table with defaults (columns with default values)
* 3. Columns that materialized from other columns (materialized columns)
* All three types of columns are materialized (not constants).
*/
Block addMissingDefaults(
const Block & block,
const NamesAndTypesList & required_columns,
const std::unordered_map<std::string, ColumnDefault> & column_defaults,
const Context & context);
}