expression: fix casting REAL type to STRING type (#16975)

close #16974 expression: fix casting REAL type to STRING type - unify the behavior of converting real types to strings in tidb#53129 and tikv. - use ryu lib in tikv to implement casting real type to str type. - `if abs(num) >= 1e15 or (num is not zero and abs(num) < 1e-15)` then use decimal exponent format Signed-off-by: TONG, Zhigao <tongzhigao@pingcap.com>
tikv · May 11, 2024 · 7fb3666 · 7fb3666
1 parent 69f13af
commit 7fb3666
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diff --git a/Cargo.lock b/Cargo.lock
diff --git a/components/tidb_query_expr/Cargo.toml b/components/tidb_query_expr/Cargo.toml
@@ -22,6 +22,7 @@ num-traits = "0.2"
 openssl = { workspace = true }
 protobuf = "2"
 regex = "1.1"
+ryu = "1.0"
 safemem = { version = "0.3", default-features = false }
 serde = "1.0"
 serde_json = "1.0"