ClickHouse/tests/queries/0_stateless/01388_multi_if_optimization.sql

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2020-07-08 22:41:25 +00:00
-- If you are reading this test please note that as of now this setting does not provide benefits in most of the cases.
SET optimize_if_chain_to_multiif = 0;
EXPLAIN SYNTAX SELECT number = 1 ? 'hello' : (number = 2 ? 'world' : 'xyz') FROM numbers(10);
SET optimize_if_chain_to_multiif = 1;
EXPLAIN SYNTAX SELECT number = 1 ? 'hello' : (number = 2 ? 'world' : 'xyz') FROM numbers(10);