refinements

Author: MahdiBM

Sources/PostgresNIO/New/PSQLRowStream.swift

@@ -114,7 +114,7 @@ final class PSQLRowStream: @unchecked Sendable {
             self.downstreamState = .consumed(.failure(error))
         }
 
-        return PostgresRowSequence(producer.sequence, stream: self)
+        return PostgresRowSequence(producer.sequence, rowStream: self)
     }
 
     func demand() {

Sources/PostgresNIO/New/PostgresRowSequence.swift

@@ -10,17 +10,17 @@ public struct PostgresRowSequence: AsyncSequence, Sendable {
     typealias BackingSequence = NIOThrowingAsyncSequenceProducer<DataRow, Error, AdaptiveRowBuffer, PSQLRowStream>
 
     private let backing: BackingSequence
-    private let stream: PSQLRowStream
+    private let rowStream: PSQLRowStream
     var lookupTable: [String: Int] {
-        self.stream.lookupTable
+        self.rowStream.lookupTable
     }
     var columns: [RowDescription.Column] {
-        self.stream.rowDescription
+        self.rowStream.rowDescription
     }
 
-    init(_ backing: BackingSequence, stream: PSQLRowStream) {
+    init(_ backing: BackingSequence, rowStream: PSQLRowStream) {
         self.backing = backing
-        self.stream = stream
+        self.rowStream = rowStream
     }
 
     public func makeAsyncIterator() -> AsyncIterator {
@@ -72,9 +72,11 @@ extension PostgresRowSequence {
         return result
     }
 
-    public func collectWithMetadata() async throws -> (metadata: PostgresQueryMetadata?, rows: [PostgresRow]) {
+    public func collectWithMetadata() async throws -> (metadata: PostgresQueryMetadata, rows: [PostgresRow]) {
         let rows = try await self.collect()
-        let metadata = PostgresQueryMetadata(string: self.stream.commandTag)
+        guard let metadata = PostgresQueryMetadata(string: self.rowStream.commandTag) else {
+            throw PSQLError.invalidCommandTag(self.rowStream.commandTag)
+        }
         return (metadata, rows)
     }
 }

Tests/IntegrationTests/AsyncTests.swift

@@ -63,9 +63,9 @@ final class AsyncPostgresConnectionTests: XCTestCase {
                 XCTAssertEqual(element, counter + 1)
                 counter += 1
             }
-            XCTAssertEqual(metadata?.command, "SELECT")
-            XCTAssertEqual(metadata?.oid, nil)
-            XCTAssertEqual(metadata?.rows, 10000)
+            XCTAssertEqual(metadata.command, "SELECT")
+            XCTAssertEqual(metadata.oid, nil)
+            XCTAssertEqual(metadata.rows, 10000)
 
             XCTAssertEqual(counter, end)
         }
@@ -268,7 +268,7 @@ final class AsyncPostgresConnectionTests: XCTestCase {
             )
             let result = try await connection.query(insertionQuery, logger: .psqlTest)
             let metadata = try await result.collectWithMetadata().metadata
-            XCTAssertEqual(metadata?.rows, rowsCount)
+            XCTAssertEqual(metadata.rows, rowsCount)
 
             let dropQuery = PostgresQuery(unsafeSQL: "DROP TABLE table1")
             try await connection.query(dropQuery, logger: .psqlTest)