Change the table comment after created the table is not supported now?
Like mysql : ALTER TABLE [tableName] COMMNET [comment]; 
The sql "ALTER TABLE `system`.tables UPDATE Comment='test' WHERE NAME='t1';" also not supported!!!
My version is '21.9.4.35'。
#include <QueryPipeline/narrowBlockInputStreams.h>
#include <Processors/Sources/SourceFromSingleChunk.h>
#include <Storages/StorageMerge.h>
#include <Storages/StorageFactory.h>
#include <Storages/VirtualColumnUtils.h>
#include <Storages/AlterCommands.h>
#include <Interpreters/Context.h>
#include <Interpreters/TreeRewriter.h>
#include <Interpreters/ExpressionActions.h>
#include <Interpreters/evaluateConstantExpression.h>
#include <Interpreters/InterpreterSelectQuery.h>
#include <Interpreters/IdentifierSemantic.h>
#include <Interpreters/getHeaderForProcessingStage.h>