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JSON.GET writes exponents as 1e+21; RedisJSON writes 1e21 #473
Description
KiviDB writes JSON with serde_json (json_text in src/commands/json.rs, and serde_json::to_vec in src/snapshot.rs and src/vector/mod.rs). serde_json 1.0.149 formats floats with zmij, which writes e+. So 1e21 comes back as 1e+21, and 18446744073709551616 as 1.8446744073709552e+19.
RedisJSON: its serde_json uses ryu, which writes 1e21 and 1.8446744073709552e19.
Both forms are valid JSON for the same value, but clients or tests that compare JSON.GET text byte for byte against Redis see a difference.
Possible fixes: rewrite e+ to e in the writer, or format floats with ryu.
Found while reviewing #463 (#445). RedisJSON's replies come from a byte-for-byte probe against Redis 8.10.3.
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