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Alter primary key: development [#METR-21119].

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This commit is contained in:
Alexey Milovidov 2016-05-17 04:17:32 +03:00
parent 19307ac141
commit d680a7f8da
2 changed files with 12 additions and 2 deletions
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2
dbms/include/DB/Databases/IDatabase.h
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@ -79,7 +79,7 @@ public:
const NamesAndTypesList & materialized_columns,
const NamesAndTypesList & alias_columns,
const ColumnDefaults & column_defaults,
const ASTModifier & engine_modifier);
const ASTModifier & engine_modifier) = 0;
/// Получить запрос CREATE TABLE для таблицы. Может выдавать информацию и для detached таблиц, для которых есть метаданные.
virtual ASTPtr getCreateQuery(const String & name) const = 0;

12
dbms/src/Storages/StorageMergeTree.cpp
View File

@ -8,6 +8,7 @@
#include <DB/Common/escapeForFileName.h>
#include <DB/Interpreters/InterpreterAlterQuery.h>
#include <DB/Interpreters/ExpressionAnalyzer.h>
#include <DB/Parsers/ASTFunction.h>
#include <Poco/DirectoryIterator.h>
@ -211,7 +212,16 @@ void StorageMergeTree::alter(
context.getDatabase(database_name)->alterTable(
context, table_name,
new_columns, new_materialized_columns, new_alias_columns, new_column_defaults,
[&new_primary_key_ast] (ASTPtr & primary_key_ast) { primary_key_ast = new_primary_key_ast; });
[&new_primary_key_ast] (ASTPtr & engine_ast)
{
ASTFunction * tuple = new ASTFunction(new_primary_key_ast->range);
tuple->name = "tuple";
tuple->arguments = new_primary_key_ast;
tuple->children.push_back(tuple->arguments);
/// Первичный ключ находится на втором месте в описании движка таблицы и может быть представлен в виде кортежа.
typeid_cast<ASTExpressionList &>(*typeid_cast<ASTFunction &>(*engine_ast).arguments).children.at(1) = tuple;
});
materialized_columns = new_materialized_columns;
alias_columns = new_alias_columns;