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#pragma once
#include <Parsers/IAST.h>
#include <map>
namespace DB
{
class ASTColumns;
class ASTCreateQuery;
class ASTIdentifier;
class ASTStorage;
/// Storage and column overrides for a single table, for example:
///
/// TABLE OVERRIDE `foo` (PARTITION BY toYYYYMM(`createtime`))
///
class ASTTableOverride : public IAST
{
public:
String table_name;
ASTColumns * columns = nullptr;
ASTStorage * storage = nullptr;
bool is_standalone = true;
String getID(char) const override { return "TableOverride " + table_name; }
ASTPtr clone() const override;
void formatImpl(const FormatSettings & settings, FormatState & state, FormatStateStacked frame) const override;
void forEachPointerToChild(std::function<void(void**)> f) override
{
f(reinterpret_cast<void **>(&columns));
f(reinterpret_cast<void **>(&storage));
}
};
/// List of table overrides, for example:
///
/// TABLE OVERRIDE `foo` (PARTITION BY toYYYYMM(`createtime`)),
/// TABLE OVERRIDE `bar` (SAMPLE BY `id`)
///
class ASTTableOverrideList : public IAST
{
public:
String getID(char) const override { return "TableOverrideList"; }
ASTPtr clone() const override;
void formatImpl(const FormatSettings & settings, FormatState & state, FormatStateStacked frame) const override;
void setTableOverride(const String & name, ASTPtr ast);
void removeTableOverride(const String & name);
ASTPtr tryGetTableOverride(const String & name) const;
bool hasOverride(const String & name) const;
private:
std::map<String, size_t> positions;
};
}
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