Package org.yamcs.yarch.streamsql

Class DeleteStatement

java.lang.Object

org.yamcs.yarch.streamsql.SimpleStreamSqlStatement

org.yamcs.yarch.streamsql.DeleteStatement

All Implemented Interfaces:

StreamSqlStatement

public class DeleteStatement
extends SimpleStreamSqlStatement

Execute a statement:

 delete from <table> where <cond> limit n
 

The query returns a tuple containing the number of inspected and deleted rows.

Note that rocksdb does not remove the data from the disk immediately. The freeing of the space will only happen when a compact operation will be executed on the files which have removed data inside. See Rocksdb Compaction for details.

Constructor Summary

Constructors

Constructor	Description
DeleteStatement(String tableName, Expression whereClause, long limit)

Method Summary

Modifier and Type	Method	Description
protected void	execute(ExecutionContext context, Consumer<Tuple> consumer)
protected TupleDefinition	getResultDefinition()

Methods inherited from class org.yamcs.yarch.streamsql.SimpleStreamSqlStatement

execute, execute

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.yamcs.yarch.streamsql.StreamSqlStatement

execute

Constructor Detail

DeleteStatement

public DeleteStatement(String tableName,
                       Expression whereClause,
                       long limit)

Method Detail

execute

protected void execute(ExecutionContext context,
                       Consumer<Tuple> consumer)
                throws StreamSqlException

Specified by:

execute in class SimpleStreamSqlStatement

Throws:

StreamSqlException

getResultDefinition

protected TupleDefinition getResultDefinition()

Overrides:

getResultDefinition in class SimpleStreamSqlStatement