• DataStax C# Driver for Apache Cassandra API Documentation
Search Results for

    Show / Hide Table of Contents
    • Cassandra
      • AesColumnEncryptionPolicy
      • AesColumnEncryptionPolicy.AesKeyAndIV
      • AggregateMetadata
      • AlreadyExistsException
      • AtomicMonotonicTimestampGenerator
      • AtomicMonotonicWinApiTimestampGenerator
      • AuthenticationException
      • BaseColumnEncryptionPolicy<TKey>
      • BaseColumnEncryptionPolicy<TKey>.ColMetadataKey
      • BatchStatement
      • BatchType
      • BigIntegerTypeAdapter
      • BoundStatement
      • Builder
      • BusyPoolException
      • CassandraConnectionStringBuilder
      • ClientOptions
      • Cluster
      • ColumnDesc
      • ColumnEncryptionInvalidTypeError
      • ColumnEncryptionMetadata
      • ColumnTypeCode
      • CompressionType
      • Configuration
      • ConsistencyLevel
      • ConstantReconnectionPolicy
      • ConstantSpeculativeExecutionPolicy
      • CqlColumn
      • CqlVector<T>
      • CustomColumnInfo
      • DCAwareRoundRobinPolicy
      • DataCollectionMetadata
      • DataCollectionMetadata.SortOrder
      • DecimalTypeAdapter
      • DefaultLoadBalancingPolicy
      • DefaultRetryPolicy
      • Diagnostics
      • DowngradingConsistencyRetryPolicy
      • DriverException
      • DriverInternalError
      • Duration
      • DynamicCompositeTypeAdapter
      • EC2MultiRegionTranslator
      • EncryptedValue
      • ExecutionException
      • ExecutionInfo
      • ExponentialReconnectionPolicy
      • Extensions
      • FallthroughRetryPolicy
      • FixedReconnectionPolicy
      • FunctionFailureException
      • FunctionMetadata
      • GraphProtocol
      • Host
      • HostDistance
      • HostsEventArgs
      • HostsEventArgs.Kind
      • HostsEventHandler
      • IAddressTranslator
      • IAuthProvider
      • IAuthenticator
      • ICluster
      • IColumnEncryptionPolicy
      • IColumnInfo
      • IExecutionProfile
      • IExecutionProfileBuilder
      • IExecutionProfileOptions
      • IExtendedRetryPolicy
      • IFrameCompressor
      • IInitializer
      • ILoadBalancingPolicy
      • IReconnectionPolicy
      • IReconnectionSchedule
      • IRequestTracker
      • IRetryPolicy
      • ISession
      • ISessionState
      • ISpeculativeExecutionPlan
      • ISpeculativeExecutionPolicy
      • IStatement
      • ITimestampGenerator
      • ITypeAdapter
      • IdempotenceAwareRetryPolicy
      • IndexMetadata
      • IndexMetadata.IndexKind
      • InitFatalErrorException
      • InvalidConfigurationInQueryException
      • InvalidQueryException
      • InvalidTypeException
      • IsBootstrappingException
      • KeyType
      • KeyspaceMetadata
      • ListColumnInfo
      • LocalDate
      • LocalTime
      • Logger
      • LoggingRetryPolicy
      • MapColumnInfo
      • MaterializedViewMetadata
      • Metadata
      • MetadataSyncOptions
      • MetricsExtensions
      • MonitorReportingOptions
      • NoHostAvailableException
      • NoSpeculativeExecutionPolicy
      • NodeRequestInfo
      • NoneAuthProvider
      • NullTypeAdapter
      • OperationTimedOutException
      • OverloadedException
      • PlainTextAuthProvider
      • Policies
      • PoolingOptions
      • PrepareRequest
      • PreparedQueryNotFoundException
      • PreparedStatement
      • PreparedStatementIdMismatchException
      • ProtocolErrorException
      • ProtocolOptions
      • ProtocolVersion
      • QueryExecutionException
      • QueryOptions
      • QueryProtocolOptions
      • QueryProtocolOptions.QueryFlags
      • QueryTimeoutException
      • QueryTrace
      • QueryTrace.Event
      • QueryValidationException
      • ReadFailureException
      • ReadTimeoutException
      • RegularStatement
      • ReplicationStrategies
      • RequestInvalidException
      • RetryDecision
      • RetryDecision.RetryDecisionType
      • RetryLoadBalancingPolicy
      • RetryLoadBalancingPolicyEventArgs
      • RoundRobinPolicy
      • RoutingKey
      • Row
      • RowSet
      • RowSetMetadata
      • SSLOptions
      • SchemaChangedEventArgs
      • SchemaChangedEventArgs.Kind
      • SchemaChangedEventHandler
      • ServerErrorException
      • Session
      • SessionRequestInfo
      • SetColumnInfo
      • SimpleStatement
      • SocketOptions
      • Statement
      • SyntaxError
      • TableColumn
      • TableMetadata
      • TableOptions
      • TimeUuid
      • ToManyConnectionsPerHost
      • TokenAwarePolicy
      • TraceRetrievalException
      • TruncateException
      • TupleColumnInfo
      • TypeAdapters
      • UdtColumnInfo
      • UdtMap
      • UdtMap<T>
      • UdtMappingDefinitions
      • UnauthorizedException
      • UnavailableException
      • Unset
      • VectorColumnInfo
      • WriteFailureException
      • WriteTimeoutException
    • Cassandra.AppMetrics
      • DriverAppMetricsOptions
    • Cassandra.AppMetrics.MetricTypes
      • IAppMetricsCounter
      • IAppMetricsGauge
      • IAppMetricsMeter
      • IAppMetricsMetric
      • IAppMetricsTimer
    • Cassandra.AppMetrics.MetricValues
      • IAppMetricsHistogramValue
      • IAppMetricsMeterValue
      • IAppMetricsMetricWithValue<T>
      • IAppMetricsTimerValue
    • Cassandra.Data
      • CqlBatchTransaction
      • CqlCommand
      • CqlConnection
      • CqlDataAdapter
      • CqlParameter
      • CqlParameterCollection
      • CqlProviderFactory
      • CqlReader
    • Cassandra.Data.Linq
      • AllowFilteringAttribute
      • Batch
      • ClusteringKeyAttribute
      • ColumnAttribute
      • CompactStorageAttribute
      • CounterAttribute
      • CqlArgumentException
      • CqlCommand
      • CqlConditionalCommand<TEntity>
      • CqlDelete
      • CqlFunction
      • CqlInsert<TEntity>
      • CqlLinqNotSupportedException
      • CqlOperator
      • CqlQueryBase<TEntity>
      • CqlQueryExtensions
      • CqlQuerySingleElement<TEntity>
      • CqlQuery<TEntity>
      • CqlScalar<TEntity>
      • CqlToken
      • CqlUpdate
      • ITable
      • IgnoreAttribute
      • PartitionKeyAttribute
      • SecondaryIndexAttribute
      • SessionExtensions
      • StaticColumnAttribute
      • TableAttribute
      • TableType
      • Table<TEntity>
    • Cassandra.DataStax.Auth
      • DseGssapiAuthProvider
      • DsePlainTextAuthProvider
    • Cassandra.DataStax.Auth.Sspi
      • SspiException
    • Cassandra.DataStax.Graph
      • Direction
      • Edge
      • Element
      • ElementMap
      • EnumWrapper
      • FluentGraphStatement
      • GraphNode
      • GraphOptions
      • GraphResultSet
      • GraphStatement
      • IEdge
      • IElement
      • IGraphNode
      • IGraphStatement
      • IPath
      • IProperty
      • IPropertyWithElement
      • IVertex
      • IVertexProperty
      • Path
      • SimpleGraphStatement
      • TEnum
      • Traverser
      • Vertex
    • Cassandra.DataStax.Graph.Internal
      • IGraphSONDeserializer
      • IGraphSONReader
      • IGraphSONSerializer
      • IGraphSONWriter
    • Cassandra.DataStax.Search
      • DateRange
      • DateRangeBound
      • DateRangePrecision
    • Cassandra.Geometry
      • GeometryBase
      • LineString
      • Point
      • Polygon
    • Cassandra.Mapping
      • AppliedInfo<T>
      • ColumnMap
      • Cql
      • CqlQueryOptions
      • IColumnDefinition
      • ICqlBatch
      • ICqlQueryAsyncClient
      • ICqlQueryClient
      • ICqlWriteAsyncClient
      • ICqlWriteClient
      • IMapper
      • IPage<T>
      • ITypeDefinition
      • Map<TPoco>
      • Mapper
      • MappingConfiguration
      • Mappings
      • PrimaryKeyAttribute
      • SortOrder
      • TableNameAttribute
    • Cassandra.Mapping.Attributes
      • ClusteringKeyAttribute
      • ColumnAttribute
      • CounterAttribute
      • FrozenAttribute
      • FrozenKeyAttribute
      • FrozenValueAttribute
      • IgnoreAttribute
      • PartitionKeyAttribute
      • SecondaryIndexAttribute
      • StaticColumnAttribute
      • TableAttribute
    • Cassandra.Mapping.TypeConversion
      • DefaultTypeConverter
      • EnumStringMapper<T>
      • NullableEnumStringMapper<T>
      • TypeConverter
    • Cassandra.Mapping.Utils
      • MemberInfoExtensions
    • Cassandra.Metrics
      • DriverMetricsOptions
      • IDriverMetrics
      • IMetric
      • IMetricsRegistry<TMetric>
      • NodeMetric
      • NodeMetric.Counters
      • NodeMetric.Gauges
      • NodeMetric.Meters
      • NodeMetric.Timers
      • SessionMetric
      • SessionMetric.Counters
      • SessionMetric.Gauges
      • SessionMetric.Meters
      • SessionMetric.Timers
    • Cassandra.Metrics.Abstractions
      • IDriverCounter
      • IDriverGauge
      • IDriverMeter
      • IDriverMetric
      • IDriverMetricsProvider
      • IDriverTimer
    • Cassandra.OpenTelemetry
      • BuilderExtensions
      • CassandraActivitySourceHelper
      • CassandraInstrumentationOptions
      • OpenTelemetryRequestTracker
    • Cassandra.Serialization
      • CustomTypeSerializer<T>
      • TypeSerializer
      • TypeSerializerDefinitions
      • TypeSerializer<T>
      • UdtSerializer
    • Cassandra.Serialization.Primitive
      • DecimalSerializer

    Class CqlScalar<TEntity>

    Represents an IQueryable that returns the first column of the first rows

    Inheritance
    object
    Statement
    CqlQueryBase<TEntity>
    CqlScalar<TEntity>
    Implements
    IStatement
    Inherited Members
    CqlQueryBase<TEntity>.QueryAbortTimeout
    CqlQueryBase<TEntity>.Expression
    CqlQueryBase<TEntity>.ElementType
    CqlQueryBase<TEntity>.QueryTrace
    CqlQueryBase<TEntity>.RoutingKey
    CqlQueryBase<TEntity>.Keyspace
    CqlQueryBase<TEntity>.GetTable()
    CqlQueryBase<TEntity>.InternalExecuteWithProfileAsync(string, string, object[])
    Statement.ProxyExecuteKey
    Statement.QueryValues
    Statement.SkipMetadata
    Statement.ConsistencyLevel
    Statement.SerialConsistencyLevel
    Statement.PageSize
    Statement.IsTracing
    Statement.ReadTimeoutMillis
    Statement.RetryPolicy
    Statement.PagingState
    Statement.Timestamp
    Statement.AutoPage
    Statement.OutgoingPayload
    Statement.IsIdempotent
    Statement.Host
    Statement.ExecutingAs(string)
    Statement.SetAutoPage(bool)
    Statement.SetPagingState(byte[])
    Statement.SetReadTimeoutMillis(int)
    Statement.SetSerialConsistencyLevel(ConsistencyLevel)
    Statement.SetTimestamp(DateTimeOffset)
    Statement.EnableTracing(bool)
    Statement.DisableTracing()
    Statement.SetRetryPolicy(IRetryPolicy)
    Statement.SetIdempotence(bool)
    Statement.SetPageSize(int)
    Statement.SetOutgoingPayload(IDictionary<string, byte[]>)
    Statement.SetHost(Host)
    object.Equals(object)
    object.Equals(object, object)
    object.GetHashCode()
    object.GetType()
    object.MemberwiseClone()
    object.ReferenceEquals(object, object)
    Namespace: Cassandra.Data.Linq
    Assembly: Cassandra.dll
    Syntax
    public class CqlScalar<TEntity> : CqlQueryBase<TEntity>, IStatement
    Type Parameters
    Name Description
    TEntity

    Methods

    BeginExecute(AsyncCallback, object)

    Declaration
    public IAsyncResult BeginExecute(AsyncCallback callback, object state)
    Parameters
    Type Name Description
    AsyncCallback callback
    object state
    Returns
    Type Description
    IAsyncResult

    EndExecute(IAsyncResult)

    Declaration
    public TEntity EndExecute(IAsyncResult ar)
    Parameters
    Type Name Description
    IAsyncResult ar
    Returns
    Type Description
    TEntity

    Execute()

    Declaration
    public TEntity Execute()
    Returns
    Type Description
    TEntity

    Execute(string)

    Declaration
    public TEntity Execute(string executionProfile)
    Parameters
    Type Name Description
    string executionProfile
    Returns
    Type Description
    TEntity

    ExecuteAsync()

    Declaration
    public Task<TEntity> ExecuteAsync()
    Returns
    Type Description
    Task<TEntity>

    ExecuteAsync(string)

    Declaration
    public Task<TEntity> ExecuteAsync(string executionProfile)
    Parameters
    Type Name Description
    string executionProfile
    Returns
    Type Description
    Task<TEntity>

    GetCql(out object[])

    Declaration
    protected override string GetCql(out object[] values)
    Parameters
    Type Name Description
    object[] values
    Returns
    Type Description
    string
    Overrides
    CqlQueryBase<TEntity>.GetCql(out object[])

    SetConsistencyLevel(ConsistencyLevel?)

    Declaration
    public CqlScalar<TEntity> SetConsistencyLevel(ConsistencyLevel? consistencyLevel)
    Parameters
    Type Name Description
    ConsistencyLevel? consistencyLevel
    Returns
    Type Description
    CqlScalar<TEntity>

    ToString()

    Declaration
    public override string ToString()
    Returns
    Type Description
    string
    Overrides
    object.ToString()

    Implements

    IStatement
    Back to top © DataStax, All rights reserved.