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108 lines
3.9 KiB
C++
108 lines
3.9 KiB
C++
#include <Storages/IStorage.h>
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#include <Parsers/TablePropertiesQueriesASTs.h>
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#include <Parsers/formatAST.h>
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#include <Processors/Sources/SourceFromSingleChunk.h>
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#include <QueryPipeline/BlockIO.h>
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#include <DataTypes/DataTypesNumber.h>
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#include <DataTypes/DataTypeString.h>
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#include <Columns/ColumnString.h>
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#include <Common/typeid_cast.h>
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#include <Access/Common/AccessFlags.h>
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#include <Interpreters/Context.h>
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#include <Interpreters/formatWithPossiblyHidingSecrets.h>
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#include <Interpreters/InterpreterShowCreateQuery.h>
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#include <Parsers/ASTCreateQuery.h>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int SYNTAX_ERROR;
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extern const int THERE_IS_NO_QUERY;
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extern const int BAD_ARGUMENTS;
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}
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BlockIO InterpreterShowCreateQuery::execute()
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{
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BlockIO res;
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res.pipeline = executeImpl();
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return res;
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}
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Block InterpreterShowCreateQuery::getSampleBlock()
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{
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return Block{{
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ColumnString::create(),
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std::make_shared<DataTypeString>(),
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"statement"}};
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}
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QueryPipeline InterpreterShowCreateQuery::executeImpl()
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{
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ASTPtr create_query;
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ASTQueryWithTableAndOutput * show_query;
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if ((show_query = query_ptr->as<ASTShowCreateTableQuery>()) ||
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(show_query = query_ptr->as<ASTShowCreateViewQuery>()) ||
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(show_query = query_ptr->as<ASTShowCreateDictionaryQuery>()))
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{
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auto resolve_table_type = show_query->temporary ? Context::ResolveExternal : Context::ResolveOrdinary;
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auto table_id = getContext()->resolveStorageID(*show_query, resolve_table_type);
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bool is_dictionary = static_cast<bool>(query_ptr->as<ASTShowCreateDictionaryQuery>());
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if (is_dictionary)
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getContext()->checkAccess(AccessType::SHOW_DICTIONARIES, table_id);
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else
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getContext()->checkAccess(AccessType::SHOW_COLUMNS, table_id);
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create_query = DatabaseCatalog::instance().getDatabase(table_id.database_name)->getCreateTableQuery(table_id.table_name, getContext());
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auto & ast_create_query = create_query->as<ASTCreateQuery &>();
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if (query_ptr->as<ASTShowCreateViewQuery>())
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{
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if (!ast_create_query.isView())
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throw Exception(ErrorCodes::BAD_ARGUMENTS, "{}.{} is not a VIEW",
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backQuote(ast_create_query.getDatabase()), backQuote(ast_create_query.getTable()));
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}
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else if (is_dictionary)
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{
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if (!ast_create_query.is_dictionary)
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throw Exception(ErrorCodes::BAD_ARGUMENTS, "{}.{} is not a DICTIONARY",
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backQuote(ast_create_query.getDatabase()), backQuote(ast_create_query.getTable()));
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}
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}
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else if ((show_query = query_ptr->as<ASTShowCreateDatabaseQuery>()))
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{
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if (show_query->temporary)
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throw Exception(ErrorCodes::SYNTAX_ERROR, "Temporary databases are not possible.");
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show_query->setDatabase(getContext()->resolveDatabase(show_query->getDatabase()));
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getContext()->checkAccess(AccessType::SHOW_DATABASES, show_query->getDatabase());
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create_query = DatabaseCatalog::instance().getDatabase(show_query->getDatabase())->getCreateDatabaseQuery();
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}
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if (!create_query)
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throw Exception(ErrorCodes::THERE_IS_NO_QUERY,
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"Unable to show the create query of {}. Maybe it was created by the system.",
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show_query->getTable());
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if (!getContext()->getSettingsRef().show_table_uuid_in_table_create_query_if_not_nil)
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{
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auto & create = create_query->as<ASTCreateQuery &>();
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create.uuid = UUIDHelpers::Nil;
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create.to_inner_uuid = UUIDHelpers::Nil;
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}
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MutableColumnPtr column = ColumnString::create();
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column->insert(format({.ctx = getContext(), .query = *create_query, .one_line = false}));
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return QueryPipeline(std::make_shared<SourceFromSingleChunk>(Block{{
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std::move(column),
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std::make_shared<DataTypeString>(),
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"statement"}}));
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}
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}
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