ClickHouse/src/Interpreters/getTableExpressions.h

#pragma once

#include <Core/NamesAndTypes.h>
#include <Interpreters/Context_fwd.h>
#include <Interpreters/DatabaseAndTableWithAlias.h>

namespace DB
{

struct ASTTableExpression;
class ASTSelectQuery;

using ASTTableExprConstPtrs = std::vector<const ASTTableExpression *>;

NameSet removeDuplicateColumns(NamesAndTypesList & columns);

ASTTableExprConstPtrs getTableExpressions(const ASTSelectQuery & select_query);

const ASTTableExpression * getTableExpression(const ASTSelectQuery & select, size_t table_number);

ASTPtr extractTableExpression(const ASTSelectQuery & select, size_t table_number);

TablesWithColumns getDatabaseAndTablesWithColumns(
        const ASTTableExprConstPtrs & table_expressions,
        ContextPtr context,
        bool include_all = false);

}