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116 lines
4.2 KiB
SQL
116 lines
4.2 KiB
SQL
-- Tests that sort expression ORDER BY ALL
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DROP TABLE IF EXISTS order_by_all;
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CREATE TABLE order_by_all
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(
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a String,
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b Nullable(Int32)
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)
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ENGINE = Memory;
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INSERT INTO order_by_all VALUES ('B', 3), ('C', NULL), ('D', 1), ('A', 2);
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SELECT '-- no modifiers';
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SET allow_experimental_analyzer = 0;
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SELECT a, b FROM order_by_all ORDER BY ALL;
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SELECT b, a FROM order_by_all ORDER BY ALL;
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SET allow_experimental_analyzer = 1;
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SELECT a, b FROM order_by_all ORDER BY ALL;
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SELECT b, a FROM order_by_all ORDER BY ALL;
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SELECT '-- with ASC/DESC modifiers';
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SET allow_experimental_analyzer = 0;
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SELECT a, b FROM order_by_all ORDER BY ALL ASC;
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SELECT a, b FROM order_by_all ORDER BY ALL DESC;
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SET allow_experimental_analyzer = 1;
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SELECT a, b FROM order_by_all ORDER BY ALL ASC;
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SELECT a, b FROM order_by_all ORDER BY ALL DESC;
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SELECT '-- with NULLS FIRST/LAST modifiers';
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SET allow_experimental_analyzer = 0;
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SELECT b, a FROM order_by_all ORDER BY ALL NULLS FIRST;
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SELECT b, a FROM order_by_all ORDER BY ALL NULLS LAST;
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SET allow_experimental_analyzer = 1;
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SELECT b, a FROM order_by_all ORDER BY ALL NULLS FIRST;
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SELECT b, a FROM order_by_all ORDER BY ALL NULLS LAST;
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SELECT '-- SELECT *';
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SET allow_experimental_analyzer = 0;
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SELECT * FROM order_by_all ORDER BY all;
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SET allow_experimental_analyzer = 1;
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SELECT * FROM order_by_all ORDER BY all;
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DROP TABLE order_by_all;
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SELECT '-- the trouble starts when "order by all is all" is ambiguous';
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CREATE TABLE order_by_all
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(
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a String,
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b Nullable(Int32),
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all UInt64
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)
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ENGINE = Memory;
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INSERT INTO order_by_all VALUES ('B', 3, 10), ('C', NULL, 40), ('D', 1, 20), ('A', 2, 30);
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SELECT ' -- columns';
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SET allow_experimental_analyzer = 0;
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SELECT a, b, all FROM order_by_all ORDER BY all; -- { serverError UNEXPECTED_EXPRESSION }
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SELECT a, b, all FROM order_by_all ORDER BY all SETTINGS enable_order_by_all = false;
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SELECT a FROM order_by_all ORDER BY all; -- { serverError UNEXPECTED_EXPRESSION }
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SELECT a FROM order_by_all ORDER BY all SETTINGS enable_order_by_all = false;
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SELECT * FROM order_by_all ORDER BY all; -- { serverError UNEXPECTED_EXPRESSION }
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SELECT * FROM order_by_all ORDER BY all SETTINGS enable_order_by_all = false;
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SET allow_experimental_analyzer = 1;
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SELECT a, b, all FROM order_by_all ORDER BY all; -- { serverError UNEXPECTED_EXPRESSION }
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SELECT a, b, all FROM order_by_all ORDER BY all SETTINGS enable_order_by_all = false;
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SELECT a FROM order_by_all ORDER BY all SETTINGS enable_order_by_all = false;
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-- SELECT * FROM order_by_all ORDER BY all; -- { serverError UNEXPECTED_EXPRESSION } -- (*) see below
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SELECT * FROM order_by_all ORDER BY all SETTINGS enable_order_by_all = false;
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-- SELECT a FROM order_by_all ORDER BY all; -- { serverError UNEXPECTED_EXPRESSION } -- (*) see below
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-- (*) These queries show the expected behavior for analyzer. Unfortunately, it is not implemented that way yet,
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-- which is not wrong but a bit unintuitive (some may say a landmine). Keeping the queries for now for reference.
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SELECT ' -- column aliases';
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SET allow_experimental_analyzer = 0;
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SELECT a, b AS all FROM order_by_all ORDER BY all; -- { serverError UNEXPECTED_EXPRESSION }
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SELECT a, b AS all FROM order_by_all ORDER BY all SETTINGS enable_order_by_all = false;
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SET allow_experimental_analyzer = 1;
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SELECT a, b AS all FROM order_by_all ORDER BY all; -- { serverError UNEXPECTED_EXPRESSION }
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SELECT a, b AS all FROM order_by_all ORDER BY all SETTINGS enable_order_by_all = false;
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SELECT ' -- expressions';
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SET allow_experimental_analyzer = 0;
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SELECT format('{} {}', a, b) AS all FROM order_by_all ORDER BY all; -- { serverError UNEXPECTED_EXPRESSION }
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SELECT format('{} {}', a, b) AS all FROM order_by_all ORDER BY all SETTINGS enable_order_by_all = false;
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SET allow_experimental_analyzer = 1;
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SELECT format('{} {}', a, b) AS all FROM order_by_all ORDER BY all; -- { serverError UNEXPECTED_EXPRESSION }
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SELECT format('{} {}', a, b) AS all FROM order_by_all ORDER BY all SETTINGS enable_order_by_all = false;
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SELECT ' -- ORDER BY ALL loses its special meaning when used in conjunction with other columns';
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SET allow_experimental_analyzer = 0;
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SELECT a, b, all FROM order_by_all ORDER BY all, a;
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SET allow_experimental_analyzer = 1;
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SELECT a, b, all FROM order_by_all ORDER BY all, a;
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DROP TABLE order_by_all;
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