[Makisuo]

ClickHouse number literals now read back as exactly the value given.

• A subnormal float (5e-324) was a SYNTAX_ERROR; text parsing (toFloat64('5e-324')) flushes it to 0. It is written from its bits: reinterpretAsFloat64(toUInt64(1)).
• A whole double past 2^53 printed as its shortest decimal (44812297868494010) is parsed by ClickHouse as an exact integer the double is not (…008), so WHERE x = value missed the row. It is written as the double's own integer value.

Applies to column literals, lit, and untyped number operands. While here: the fuzzer's earlier "decimal float literals are 1 ULP off" lead was wrong — a bit-exact check shows String(value) round-trips; ClickHouse's text float parser (JSON input, toFloat64('…')) is the imprecise one, so the Float64 reference row is built from bits.

Verification: unit tests in literal.test.ts; Float64/Int64/UInt64 literal fuzz in strict mode at 50× against ClickHouse 25.8 (2000 values per path); full suite.

---

Stack (merge bottom-up):

1. test(fuzz): property-based fuzzer for the query builder #39 test(fuzz): property-based fuzzer for the query builder
2. fix(clickhouse): write number literals that read back exactly #40 fix(clickhouse): write number literals that read back exactly
3. fix: parenthesise an arithmetic expression passed as an argument #41 fix: parenthesise an arithmetic expression passed as an argument
4. fix: fail with QueryBuilderError instead of throwing on unusable values #42 fix: fail with QueryBuilderError instead of throwing on unusable values
5. fix: bare select() over a subquery or union selects every alias #43 fix: bare select() over a subquery or union selects every alias
6. fix(clickhouse): cast array and map comparison literals to the column type #44 fix(clickhouse): cast array and map comparison literals to the column type
7. fix(postgres): type the two placeholders Postgres would mistype #45 fix(postgres): type the two placeholders Postgres would mistype

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• .changeset/exact-number-literals.md
• src/ch/expr.ts
• src/ch/literal.test.ts
• src/ch/literal.ts
• tests/fuzz/known-issues.ts
• tests/fuzz/regressions.ts

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