Package org.apache.cassandra.cql3

Class QueryOptions

  • public abstract class QueryOptions
extends java.lang.Object
    Options for a query.

    • Constructor Detail

      • QueryOptions

        public QueryOptions()

    • Method Detail

      • forInternalCalls

        public static QueryOptions forInternalCalls​(ConsistencyLevel consistency,
                                            java.util.List<java.nio.ByteBuffer> values)

      • forInternalCallsWithNowInSec

        public static QueryOptions forInternalCallsWithNowInSec​(long nowInSec,
                                                        ConsistencyLevel consistency,
                                                        java.util.List<java.nio.ByteBuffer> values)

      • forInternalCalls

        public static QueryOptions forInternalCalls​(java.util.List<java.nio.ByteBuffer> values)

      • getValues

        public abstract java.util.List<java.nio.ByteBuffer> getValues()

      • skipMetadata

        public abstract boolean skipMetadata()

      • getJsonColumnValue

        public Term getJsonColumnValue​(int bindIndex,
                               ColumnIdentifier columnName,
                               java.util.Collection<ColumnMetadata> expectedReceivers)
                        throws InvalidRequestException
        Returns the term corresponding to column columnName in the JSON value of bind index bindIndex. This is functionally equivalent to: Json.parseJson(UTF8Type.instance.getSerializer().deserialize(getValues().get(bindIndex)), expectedReceivers).get(columnName) but this caches the result of parsing the JSON, so that while this might be called for multiple columns on the same bindIndex value, the underlying JSON value is only parsed/processed once. Note: this is a bit more involved in CQL specifics than this class generally is, but as we need to cache this per-query and in an object that is available when we bind values, this is the easiest place to have this.
        Parameters:
        bindIndex - the index of the bind value that should be interpreted as a JSON value.
        columnName - the name of the column we want the value of.
        expectedReceivers - the columns expected in the JSON value at index bindIndex. This is only used when parsing the json initially and no check is done afterwards. So in practice, any call of this method on the same QueryOptions object and with the same bindIndx values should use the same value for this parameter, but this isn't validated in any way.
        Returns:
        the value correspong to column columnName in the (JSON) bind value at index bindIndex. This may return null if the JSON value has no value for this column.
        Throws:
        InvalidRequestException

      • hasColumnSpecifications

        public boolean hasColumnSpecifications()
        Tells whether or not this QueryOptions contains the column specifications for the bound variables.

        The column specifications will be present only for prepared statements.

        Returns:
        true this QueryOptions contains the column specifications for the bound variables, false otherwise.

      • getColumnSpecifications

        public com.google.common.collect.ImmutableList<ColumnSpecification> getColumnSpecifications()
        Returns the column specifications for the bound variables (optional operation).

        The column specifications will be present only for prepared statements.

        Invoke the hasColumnSpecifications() method before invoking this method in order to ensure that this QueryOptions contains the column specifications.

        Returns:
        the option names
        Throws:
        java.lang.UnsupportedOperationException - If this QueryOptions does not contains the column specifications.

      • getPageSize

        public int getPageSize()
        The pageSize for this query. Will be <= 0 if not relevant for the query.

      • getPagingState

        public PagingState getPagingState()
        The paging state for this query, or null if not relevant.

      • getSerialConsistency

        public ConsistencyLevel getSerialConsistency()
        Serial consistency for conditional updates.

      • getTimestamp

        public long getTimestamp​(QueryState state)

      • getNowInSeconds

        public long getNowInSeconds​(QueryState state)

      • getKeyspace

        public java.lang.String getKeyspace()
        The keyspace that this query is bound to, or null if not relevant.

      • getNowInSec

        public long getNowInSec​(long ifNotSet)

      • getProtocolVersion

        public abstract ProtocolVersion getProtocolVersion()
        The protocol version for the query.

      • isReadThresholdsEnabled

        public boolean isReadThresholdsEnabled()

      • getCoordinatorReadSizeWarnThresholdBytes

        public long getCoordinatorReadSizeWarnThresholdBytes()

      • getCoordinatorReadSizeAbortThresholdBytes

        public long getCoordinatorReadSizeAbortThresholdBytes()

      • toString

        public java.lang.String toString()
        Overrides:
        toString in class java.lang.Object