cargo: bump rust-driver to 0.15

1. CassResult was refactored yet again.
Now, we clearly distinguish betwen Rows and non-Rows
result. `CassResultKind` and `CassRowsResult` are
introduced. `CassRowsResult` holds information about
the (for now, eagerly deserialized) rows and metadata.
The usages of `CassResult` are adjusted throughout the codebase.

2. CassErrorResult was extended by two variants:
- metadata deserialization error - happens during conversion from QueryResult
  to QueryRowsResult
- deserialization error - happens during eager rows deserialization.

3. CassResult construction logic was adjusted to new QueryResult.
As mentioned above, some errors can occur during conversion, thus
`CassResult::from_result_payload` returns a StdResult now.
For now, we eagerly deserialize the rows. This is equivalent to the
version before this PR.

Author: muzarski

scylla-rust-wrapper/Cargo.lock

@@ -10,7 +10,7 @@ categories = ["database"]
 license = "MIT OR Apache-2.0"
 
 [dependencies]
-scylla = { git = "https://github.com/scylladb/scylla-rust-driver.git", rev = "64b4afcd", features = [
+scylla = { git = "https://github.com/scylladb/scylla-rust-driver.git", rev = "v0.15.0", features = [
     "ssl",
 ] }
 tokio = { version = "1.27.0", features = ["full"] }
@@ -33,7 +33,7 @@ bindgen = "0.65"
 chrono = "0.4.20"
 
 [dev-dependencies]
-scylla-proxy = { git = "https://github.com/scylladb/scylla-rust-driver.git", rev = "64b4afcd" }
+scylla-proxy = { git = "https://github.com/scylladb/scylla-rust-driver.git", rev = "v0.15.0" }
 
 assert_matches = "1.5.0"
 ntest = "0.9.3"

scylla-rust-wrapper/Cargo.toml

@@ -12,6 +12,15 @@ impl ToCassError for CassErrorResult {
     fn to_cass_error(&self) -> CassError {
         match self {
             CassErrorResult::Query(query_error) => query_error.to_cass_error(),
+
+            // For now let's leave these as LIB_INVALID_DATA.
+            // I don't see any variants that would make more sense.
+            // TBH, I'm almost sure that we should introduce additional enum variants
+            // of CassError in the future ~ muzarski.
+            CassErrorResult::ResultMetadataLazyDeserialization(_) => {
+                CassError::CASS_ERROR_LIB_INVALID_DATA
+            }
+            CassErrorResult::Deserialization(_) => CassError::CASS_ERROR_LIB_INVALID_DATA,
         }
     }
 }

scylla-rust-wrapper/src/cass_error.rs

@@ -3,6 +3,8 @@ use crate::cass_error::*;
 use crate::cass_error_types::CassWriteType;
 use crate::cass_types::CassConsistency;
 use crate::types::*;
+use scylla::deserialize::DeserializationError;
+use scylla::frame::frame_errors::ResultMetadataAndRowsCountParseError;
 use scylla::statement::Consistency;
 use scylla::transport::errors::*;
 use thiserror::Error;
@@ -11,6 +13,10 @@ use thiserror::Error;
 pub enum CassErrorResult {
     #[error(transparent)]
     Query(#[from] QueryError),
+    #[error(transparent)]
+    ResultMetadataLazyDeserialization(#[from] ResultMetadataAndRowsCountParseError),
+    #[error("Failed to deserialize rows: {0}")]
+    Deserialization(#[from] DeserializationError),
 }
 
 impl From<Consistency> for CassConsistency {