mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-14 18:32:29 +00:00
121 lines
4.0 KiB
C++
121 lines
4.0 KiB
C++
#include <Storages/SelectQueryDescription.h>
|
|
|
|
#include <Parsers/ASTSelectWithUnionQuery.h>
|
|
#include <Parsers/ASTSelectQuery.h>
|
|
#include <Interpreters/getTableExpressions.h>
|
|
#include <Interpreters/AddDefaultDatabaseVisitor.h>
|
|
#include <Interpreters/Context.h>
|
|
|
|
namespace DB
|
|
{
|
|
|
|
namespace ErrorCodes
|
|
{
|
|
extern const int QUERY_IS_NOT_SUPPORTED_IN_MATERIALIZED_VIEW;
|
|
extern const int LOGICAL_ERROR;
|
|
}
|
|
|
|
SelectQueryDescription::SelectQueryDescription(const SelectQueryDescription & other)
|
|
: select_table_id(other.select_table_id)
|
|
, select_query(other.select_query ? other.select_query->clone() : nullptr)
|
|
, inner_query(other.inner_query ? other.inner_query->clone() : nullptr)
|
|
{
|
|
}
|
|
|
|
SelectQueryDescription & SelectQueryDescription::SelectQueryDescription::operator=(const SelectQueryDescription & other)
|
|
{
|
|
if (&other == this)
|
|
return *this;
|
|
|
|
select_table_id = other.select_table_id;
|
|
if (other.select_query)
|
|
select_query = other.select_query->clone();
|
|
else
|
|
select_query.reset();
|
|
|
|
if (other.inner_query)
|
|
inner_query = other.inner_query->clone();
|
|
else
|
|
inner_query.reset();
|
|
return *this;
|
|
}
|
|
|
|
|
|
namespace
|
|
{
|
|
|
|
StorageID extractDependentTableFromSelectQuery(ASTSelectQuery & query, const Context & context, bool add_default_db = true)
|
|
{
|
|
if (add_default_db)
|
|
{
|
|
AddDefaultDatabaseVisitor visitor(context.getCurrentDatabase(), false, nullptr);
|
|
visitor.visit(query);
|
|
}
|
|
|
|
if (auto db_and_table = getDatabaseAndTable(query, 0))
|
|
{
|
|
return StorageID(db_and_table->database, db_and_table->table/*, db_and_table->uuid*/);
|
|
}
|
|
else if (auto subquery = extractTableExpression(query, 0))
|
|
{
|
|
auto * ast_select = subquery->as<ASTSelectWithUnionQuery>();
|
|
if (!ast_select)
|
|
throw Exception("Logical error while creating StorageMaterializedView. "
|
|
"Could not retrieve table name from select query.",
|
|
DB::ErrorCodes::LOGICAL_ERROR);
|
|
if (ast_select->list_of_selects->children.size() != 1)
|
|
throw Exception("UNION is not supported for MATERIALIZED VIEW",
|
|
ErrorCodes::QUERY_IS_NOT_SUPPORTED_IN_MATERIALIZED_VIEW);
|
|
|
|
auto & inner_query = ast_select->list_of_selects->children.at(0);
|
|
|
|
return extractDependentTableFromSelectQuery(inner_query->as<ASTSelectQuery &>(), context, false);
|
|
}
|
|
else
|
|
return StorageID::createEmpty();
|
|
}
|
|
|
|
|
|
void checkAllowedQueries(const ASTSelectQuery & query)
|
|
{
|
|
if (query.prewhere() || query.final() || query.sampleSize())
|
|
throw Exception("MATERIALIZED VIEW cannot have PREWHERE, SAMPLE or FINAL.", DB::ErrorCodes::QUERY_IS_NOT_SUPPORTED_IN_MATERIALIZED_VIEW);
|
|
|
|
ASTPtr subquery = extractTableExpression(query, 0);
|
|
if (!subquery)
|
|
return;
|
|
|
|
if (const auto * ast_select = subquery->as<ASTSelectWithUnionQuery>())
|
|
{
|
|
if (ast_select->list_of_selects->children.size() != 1)
|
|
throw Exception("UNION is not supported for MATERIALIZED VIEW", ErrorCodes::QUERY_IS_NOT_SUPPORTED_IN_MATERIALIZED_VIEW);
|
|
|
|
const auto & inner_query = ast_select->list_of_selects->children.at(0);
|
|
|
|
checkAllowedQueries(inner_query->as<ASTSelectQuery &>());
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
SelectQueryDescription SelectQueryDescription::getSelectQueryFromASTForMatView(const ASTPtr & select, const Context & context)
|
|
{
|
|
auto & new_select = select->as<ASTSelectWithUnionQuery &>();
|
|
|
|
if (new_select.list_of_selects->children.size() != 1)
|
|
throw Exception("UNION is not supported for MATERIALIZED VIEW", ErrorCodes::QUERY_IS_NOT_SUPPORTED_IN_MATERIALIZED_VIEW);
|
|
|
|
auto & new_inner_query = new_select.list_of_selects->children.at(0);
|
|
auto & select_query = new_inner_query->as<ASTSelectQuery &>();
|
|
checkAllowedQueries(select_query);
|
|
|
|
SelectQueryDescription result;
|
|
result.select_table_id = extractDependentTableFromSelectQuery(select_query, context);
|
|
result.select_query = new_select.clone();
|
|
result.inner_query = new_inner_query->clone();
|
|
|
|
return result;
|
|
}
|
|
|
|
}
|