Why is the contents of the table not displayed in r2dbc-postgres?
AdaMorgan opened this issue · comments
Discussed in #619
Originally posted by AdaMorgan December 23, 2023
I want to display the contents of the ids column, but it is not displayed, and also does not give any error.
private static final String GET_DATA = "SELECT * FROM public.user";
public static @NotNull ConnectionFactory init() {
return ConnectionFactories.get(ConnectionFactoryOptions.builder()
.option(DRIVER, "postgresql")
.option(HOST, "localhost")
.option(PORT, 5432)
.option(USER, "postgres")
.option(PASSWORD, "postgres")
.option(DATABASE, "user")
.build());
}
public static void main(String[] args) {
Mono.from(init().create())
.map(connection -> getFlux(connection).toList())
.doOnError(error -> error.printStackTrace())
.subscribe(System.out::println);
}
public static Stream<String> getFlux(@NotNull Connection connection) {
return Flux.from(connection.createStatement(GET_DATA).execute())
.doOnError(error -> error.printStackTrace())
.flatMap(result -> result.map((row, rowMetadata) -> row.get("ids", String.class)))
.toStream();
}
```</div>
version r2dbc: 1.0.3.RELEASE
debug
17:11:26 main Loggers DEBUG Using Slf4j logging framework
17:11:26 main Extensions DEBUG Discovering Extensions using ServiceLoader
17:11:26 main Extensions DEBUG Registering extension io.r2dbc.postgresql.codec.BuiltinDynamicCodecs
17:11:27 main InternalLoggerF DEBUG Using SLF4J as the default logging framework
17:11:27 main PlatformDepende DEBUG -Dio.netty.noUnsafe: false
17:11:27 main PlatformDepende DEBUG Java version: 19
17:11:27 main PlatformDepende DEBUG sun.misc.Unsafe.theUnsafe: available
17:11:27 main PlatformDepende DEBUG sun.misc.Unsafe.copyMemory: available
17:11:27 main PlatformDepende DEBUG sun.misc.Unsafe.storeFence: available
17:11:27 main PlatformDepende DEBUG java.nio.Buffer.address: available
17:11:27 main PlatformDepende DEBUG direct buffer constructor: unavailable: Reflective setAccessible(true) disabled
17:11:27 main PlatformDepende DEBUG java.nio.Bits.unaligned: available, true
17:11:27 main PlatformDepende DEBUG jdk.internal.misc.Unsafe.allocateUninitializedArray(int): unavailable: class io.netty.util.internal.PlatformDependent0$7 cannot access class jdk.internal.misc.Unsafe (in module java.base) because module java.base does not export jdk.internal.misc to unnamed module @3891771e
17:11:27 main PlatformDepende DEBUG java.nio.DirectByteBuffer.<init>(long, {int,long}): unavailable
17:11:27 main PlatformDepende DEBUG sun.misc.Unsafe: available
17:11:27 main PlatformDepende DEBUG -Dio.netty.tmpdir: C:\Users\JOHNRE~1\AppData\Local\Temp (java.io.tmpdir)
17:11:27 main PlatformDepende DEBUG -Dio.netty.bitMode: 64 (sun.arch.data.model)
17:11:27 main PlatformDepende DEBUG Platform: Windows
17:11:27 main PlatformDepende DEBUG -Dio.netty.maxDirectMemory: -1 bytes
17:11:27 main PlatformDepende DEBUG -Dio.netty.uninitializedArrayAllocationThreshold: -1
17:11:27 main CleanerJava9 DEBUG java.nio.ByteBuffer.cleaner(): available
17:11:27 main PlatformDepende DEBUG -Dio.netty.noPreferDirect: false
17:11:27 main ResourceLeakDet DEBUG -Dio.netty.leakDetection.level: simple
17:11:27 main ResourceLeakDet DEBUG -Dio.netty.leakDetection.targetRecords: 4
17:11:27 main TcpResources DEBUG [tcp] resources will use the default LoopResources: DefaultLoopResources {prefix=reactor-tcp, daemon=true, selectCount=12, workerCount=12}
17:11:27 main TcpResources DEBUG [tcp] resources will use the default ConnectionProvider: reactor.netty.resources.DefaultPooledConnectionProvider@4201c465
17:11:27 main DefaultLoopIOUr DEBUG Default io_uring support : false
17:11:27 main DefaultLoopEpol DEBUG Default Epoll support : false
17:11:27 main DefaultLoopKQue DEBUG Default KQueue support : false
17:11:27 main MultithreadEven DEBUG -Dio.netty.eventLoopThreads: 24
17:11:27 main GlobalEventExec DEBUG -Dio.netty.globalEventExecutor.quietPeriodSeconds: 1
17:11:27 main InternalThreadL DEBUG -Dio.netty.threadLocalMap.stringBuilder.initialSize: 1024
17:11:27 main InternalThreadL DEBUG -Dio.netty.threadLocalMap.stringBuilder.maxSize: 4096
17:11:27 main NioEventLoop DEBUG -Dio.netty.noKeySetOptimization: false
17:11:27 main NioEventLoop DEBUG -Dio.netty.selectorAutoRebuildThreshold: 512
17:11:27 main PlatformDepende DEBUG org.jctools-core.MpscChunkedArrayQueue: available
17:11:27 main DefaultChannelI DEBUG -Dio.netty.processId: 7828 (auto-detected)
17:11:27 main NetUtil DEBUG -Djava.net.preferIPv4Stack: false
17:11:27 main NetUtil DEBUG -Djava.net.preferIPv6Addresses: false
17:11:27 main NetUtilInitiali DEBUG Loopback interface: lo (Software Loopback Interface 1, 127.0.0.1)
17:11:27 main NetUtil DEBUG Failed to get SOMAXCONN from sysctl and file \proc\sys\net\core\somaxconn. Default: 200
17:11:27 main DefaultChannelI DEBUG -Dio.netty.machineId: 00:15:5d:ff:fe:70:c3:e2 (auto-detected)
17:11:27 main PooledByteBufAl DEBUG -Dio.netty.allocator.numHeapArenas: 24
17:11:27 main PooledByteBufAl DEBUG -Dio.netty.allocator.numDirectArenas: 24
17:11:27 main PooledByteBufAl DEBUG -Dio.netty.allocator.pageSize: 8192
17:11:27 main PooledByteBufAl DEBUG -Dio.netty.allocator.maxOrder: 9
17:11:27 main PooledByteBufAl DEBUG -Dio.netty.allocator.chunkSize: 4194304
17:11:27 main PooledByteBufAl DEBUG -Dio.netty.allocator.smallCacheSize: 256
17:11:27 main PooledByteBufAl DEBUG -Dio.netty.allocator.normalCacheSize: 64
17:11:27 main PooledByteBufAl DEBUG -Dio.netty.allocator.maxCachedBufferCapacity: 32768
17:11:27 main PooledByteBufAl DEBUG -Dio.netty.allocator.cacheTrimInterval: 8192
17:11:27 main PooledByteBufAl DEBUG -Dio.netty.allocator.cacheTrimIntervalMillis: 0
17:11:27 main PooledByteBufAl DEBUG -Dio.netty.allocator.useCacheForAllThreads: false
17:11:27 main PooledByteBufAl DEBUG -Dio.netty.allocator.maxCachedByteBuffersPerChunk: 1023
17:11:27 main ByteBufUtil DEBUG -Dio.netty.allocator.type: pooled
17:11:27 main ByteBufUtil DEBUG -Dio.netty.threadLocalDirectBufferSize: 0
17:11:27 main ByteBufUtil DEBUG -Dio.netty.maxThreadLocalCharBufferSize: 16384