gistfile1.txt

# создаем таблицу заранее

CREATE TABLE kostya_test.view_result_table
  date Date,
  customer_id UInt32,
  val AggregateFunction (sum, UInt32)) 
ENGINE = ReplicatedAggregatingMergeTree('/clickhouse/tables/kostya_test.view_table', 
'{replica}', date, (date, prom_customer_id, val), 8192);


CREATE MATERIALIZED VIEW kostya_test.view_table
  TO kostya_test.view_result_table 
AS SELECT date, customer_id, sumState(val) AS val  
FROM test_db.log_41949_pageviews_product GROUP BY date, customer_id;


# создаем таблицу неявно

CREATE MATERIALIZED VIEW kostya_test.view_table
(  date Date,
  customer_id UInt32,
  val AggregateFunction (sum, UInt32)) 
ENGINE = ReplicatedAggregatingMergeTree('/clickhouse/tables/kostya_test.view_table', 
'{replica}', date, (date, prom_customer_id, val), 8192)
AS SELECT date, customer_id, sumState(val) AS val  
FROM test_db.log_41949_pageviews_product GROUP BY date, customer_id;


## добавляем поле NEWCOL

detach table kostya_test.view_table;

alter table kostya_test.`.inner.view_table` add column NEWCOL String;

ATTACH MATERIALIZED VIEW kostya_test.view_table
(  date Date,
  customer_id UInt32,
  val AggregateFunction (sum, UInt32),
  NEWCOL String) 
ENGINE = ReplicatedAggregatingMergeTree('/clickhouse/tables/kostya_test.view_table', 
'{replica}', date, (date, prom_customer_id, val), 8192)
AS SELECT date, customer_id, sumState(val) AS val,NEWCOL 
FROM test_db.log_41949_pageviews_product GROUP BY date, customer_id;