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26 lines
1.1 KiB
SQL
26 lines
1.1 KiB
SQL
-- Test SQL function 'generateSnowflakeID'
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SELECT 'Negative tests';
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SELECT generateSnowflakeID(1, 2, 3); -- { serverError NUMBER_OF_ARGUMENTS_DOESNT_MATCH }
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SELECT generateSnowflakeID(1, 'not_an_int'); -- { serverError ILLEGAL_TYPE_OF_ARGUMENT }
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SELECT generateSnowflakeID(1, materialize(2)); -- { serverError ILLEGAL_COLUMN }
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SELECT 'The first bit must be zero';
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SELECT bitAnd(bitShiftRight(generateSnowflakeID(), 63), 1) = 0;
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SELECT 'Test disabling of common subexpression elimination via first parameter';
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SELECT generateSnowflakeID(1) = generateSnowflakeID(2); -- disabled common subexpression elimination --> lhs != rhs
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SELECT generateSnowflakeID() = generateSnowflakeID(1); -- same as ^^
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SELECT generateSnowflakeID(1) = generateSnowflakeID(1); -- with common subexpression elimination
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SELECT 'Test user-provided machine ID';
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SELECT bitAnd(bitShiftRight(generateSnowflakeID(1, 123), 12), 1024 - 1) = 123; -- the machine id is actually set in the generated snowflake ID (1024 = 2^10)
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SELECT 'Generated Snowflake IDs are unique';
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SELECT count(*)
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FROM
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(
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SELECT DISTINCT generateSnowflakeID()
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FROM numbers(100)
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);
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