ClickHouse/dbms/tests/queries/0_stateless/00578_merge_table_shadow_virtual_column.sql

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DROP TABLE IF EXISTS test.numbers1;
DROP TABLE IF EXISTS test.numbers2;
CREATE TABLE test.numbers1 ENGINE = Memory AS SELECT number as _table FROM numbers(1000);
CREATE TABLE test.numbers2 ENGINE = Memory AS SELECT number as _table FROM numbers(1000);
SELECT count() FROM merge(test, '^numbers\\d+$') WHERE _table='numbers1'; -- { serverError 43 }
SELECT count() FROM merge(test, '^numbers\\d+$') WHERE _table=1;
DROP TABLE test.numbers1;
DROP TABLE test.numbers2;