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https://github.com/ClickHouse/ClickHouse.git
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104 lines
2.3 KiB
SQL
104 lines
2.3 KiB
SQL
-- https://github.com/ClickHouse/ClickHouse/issues/23194
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SET allow_experimental_analyzer = 1;
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DROP DATABASE IF EXISTS {CLICKHOUSE_DATABASE:Identifier};
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CREATE DATABASE {CLICKHOUSE_DATABASE:Identifier};
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USE {CLICKHOUSE_DATABASE:Identifier};
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-- simple tuple access operator
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SELECT tuple(1, 'a').1;
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-- named tuple or complex column access operator - can be applied to Nested type as well as Array of named Tuple
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SELECT CAST(('hello', 1) AS Tuple(hello String, count UInt32)) AS t, t.hello;
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-- TODO: this doesn't work
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-- https://github.com/ClickHouse/ClickHouse/issues/57361
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-- SELECT CAST(('hello', 1) AS Tuple(hello String, count UInt32)).hello;
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-- expansion of a tuple or complex column with asterisk
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SELECT tuple(1, 'a').*;
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SELECT '---';
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SELECT CAST(('hello', 1) AS Tuple(name String, count UInt32)).*;
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SELECT untuple(CAST(('hello', 1) AS Tuple(name String, count UInt32))); -- will give two columns `name` and `count`.
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SELECT '---';
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CREATE TABLE {CLICKHOUSE_DATABASE:Identifier}.t
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(
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col String,
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hello String,
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world String
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)
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ENGINE = Memory;
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CREATE TABLE {CLICKHOUSE_DATABASE:Identifier}.u
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(
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cc String
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)
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ENGINE = Memory;
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SELECT * EXCEPT('hello|world');
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-- TODO: Qualified matcher t.* EXCEPT 'hello|world' does not find table.
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-- SELECT t.* EXCEPT(hello, world);
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-- SELECT {CLICKHOUSE_DATABASE:Identifier}.t.* REPLACE(x + 1 AS x);
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SELECT * EXCEPT(hello) REPLACE(x + 1 AS x);
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SELECT COLUMNS('^c') FROM t;
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SELECT t.COLUMNS('^c') FROM t, u;
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SELECT t.COLUMNS('^c') EXCEPT (test_hello, test_world) FROM t, u;
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SELECT '---';
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SELECT * FROM (SELECT x, x FROM (SELECT 1 AS x));
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SELECT x FROM (SELECT x, x FROM (SELECT 1 AS x));
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SELECT 1 FROM (SELECT x, x FROM (SELECT 1 AS x));
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SELECT '---';
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SELECT `plus(1, 2)` FROM (SELECT 1 + 2);
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-- Lambda expressions can be aliased. (proposal)
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--SELECT arrayMap(plus, [1, 2], [10, 20]);
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--SELECT x -> x + 1 AS fun;
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SELECT '---';
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SELECT x FROM numbers(5 AS x);
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SELECT '---';
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CREATE TEMPORARY TABLE aliased
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(
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x UInt8 DEFAULT 0,
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y ALIAS x + 1
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);
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INSERT INTO aliased VALUES (10);
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SELECT y FROM aliased;
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CREATE TEMPORARY TABLE aliased2
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(
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x UInt8,
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y ALIAS ((x + 1) AS z) + 1
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);
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SELECT x, y, z FROM aliased2; -- { serverError UNKNOWN_IDENTIFIER }
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SELECT '---';
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CREATE TEMPORARY TABLE aliased3
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(
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x UInt8,
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y ALIAS z + 1,
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z ALIAS x + 1
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);
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INSERT INTO aliased3 VALUES (10);
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SELECT x, y, z FROM aliased3;
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