mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-12 01:12:12 +00:00
70d1adfe4b
* save format string for NetException * format exceptions * format exceptions 2 * format exceptions 3 * format exceptions 4 * format exceptions 5 * format exceptions 6 * fix * format exceptions 7 * format exceptions 8 * Update MergeTreeIndexGin.cpp * Update AggregateFunctionMap.cpp * Update AggregateFunctionMap.cpp * fix
85 lines
2.9 KiB
C++
85 lines
2.9 KiB
C++
#include <Storages/IStorage.h>
|
|
#include <Parsers/TablePropertiesQueriesASTs.h>
|
|
#include <Processors/Sources/SourceFromSingleChunk.h>
|
|
#include <QueryPipeline/BlockIO.h>
|
|
#include <DataTypes/DataTypesNumber.h>
|
|
#include <Columns/ColumnsNumber.h>
|
|
#include <Interpreters/Context.h>
|
|
#include <Interpreters/InterpreterExistsQuery.h>
|
|
#include <Access/Common/AccessFlags.h>
|
|
#include <Common/typeid_cast.h>
|
|
|
|
namespace DB
|
|
{
|
|
|
|
namespace ErrorCodes
|
|
{
|
|
extern const int SYNTAX_ERROR;
|
|
}
|
|
|
|
BlockIO InterpreterExistsQuery::execute()
|
|
{
|
|
BlockIO res;
|
|
res.pipeline = executeImpl();
|
|
return res;
|
|
}
|
|
|
|
|
|
Block InterpreterExistsQuery::getSampleBlock()
|
|
{
|
|
return Block{{
|
|
ColumnUInt8::create(),
|
|
std::make_shared<DataTypeUInt8>(),
|
|
"result" }};
|
|
}
|
|
|
|
|
|
QueryPipeline InterpreterExistsQuery::executeImpl()
|
|
{
|
|
ASTQueryWithTableAndOutput * exists_query;
|
|
bool result = false;
|
|
|
|
if ((exists_query = query_ptr->as<ASTExistsTableQuery>()))
|
|
{
|
|
if (exists_query->temporary)
|
|
{
|
|
result = static_cast<bool>(getContext()->tryResolveStorageID(
|
|
{"", exists_query->getTable()}, Context::ResolveExternal));
|
|
}
|
|
else
|
|
{
|
|
String database = getContext()->resolveDatabase(exists_query->getDatabase());
|
|
getContext()->checkAccess(AccessType::SHOW_TABLES, database, exists_query->getTable());
|
|
result = DatabaseCatalog::instance().isTableExist({database, exists_query->getTable()}, getContext());
|
|
}
|
|
}
|
|
else if ((exists_query = query_ptr->as<ASTExistsViewQuery>()))
|
|
{
|
|
String database = getContext()->resolveDatabase(exists_query->getDatabase());
|
|
getContext()->checkAccess(AccessType::SHOW_TABLES, database, exists_query->getTable());
|
|
auto table = DatabaseCatalog::instance().tryGetTable({database, exists_query->getTable()}, getContext());
|
|
result = table && table->isView();
|
|
}
|
|
else if ((exists_query = query_ptr->as<ASTExistsDatabaseQuery>()))
|
|
{
|
|
String database = getContext()->resolveDatabase(exists_query->getDatabase());
|
|
getContext()->checkAccess(AccessType::SHOW_DATABASES, database);
|
|
result = DatabaseCatalog::instance().isDatabaseExist(database);
|
|
}
|
|
else if ((exists_query = query_ptr->as<ASTExistsDictionaryQuery>()))
|
|
{
|
|
if (exists_query->temporary)
|
|
throw Exception(ErrorCodes::SYNTAX_ERROR, "Temporary dictionaries are not possible.");
|
|
String database = getContext()->resolveDatabase(exists_query->getDatabase());
|
|
getContext()->checkAccess(AccessType::SHOW_DICTIONARIES, database, exists_query->getTable());
|
|
result = DatabaseCatalog::instance().isDictionaryExist({database, exists_query->getTable()});
|
|
}
|
|
|
|
return QueryPipeline(std::make_shared<SourceFromSingleChunk>(Block{{
|
|
ColumnUInt8::create(1, result),
|
|
std::make_shared<DataTypeUInt8>(),
|
|
"result" }}));
|
|
}
|
|
|
|
}
|