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17 lines
837 B
SQL
17 lines
837 B
SQL
drop table if exists src;
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drop table if exists dst;
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drop table if exists mv1;
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drop table if exists mv2;
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create table src (key Int) engine=Null();
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create table dst (key Int) engine=Null();
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create materialized view mv1 to dst as select * from src;
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create materialized view mv2 to dst as select * from src;
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insert into src select * from numbers(1e6) settings log_queries=1, max_untracked_memory=0, parallel_view_processing=1;
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system flush logs;
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-- { echo }
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select view_name, read_rows, read_bytes, written_rows, written_bytes from system.query_views_log where startsWith(view_name, currentDatabase() || '.mv') order by view_name format Vertical;
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select read_rows, read_bytes, written_rows, written_bytes from system.query_log where type = 'QueryFinish' and query_kind = 'Insert' and current_database = currentDatabase() format Vertical;
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