net.sf.farrago.namespace.flatfile
Class FlatFileFennelRel

java.lang.Object
  org.eigenbase.rel.AbstractRelNode
      org.eigenbase.rel.TableAccessRelBase
          net.sf.farrago.namespace.flatfile.FlatFileFennelRel

All Implemented Interfaces:

Cloneable, FennelRel, RelNode

public class FlatFileFennelRel
extends TableAccessRelBase
implements FennelRel

FlatFileFennelRel provides a flatfile implementation for TableAccessRel with FennelRel.FENNEL_EXEC_CONVENTION.

Version:

$Id: //open/dev/farrago/src/net/sf/farrago/namespace/flatfile/FlatFileFennelRel.java#3 $

Author:

John Pham

Field Summary

private FlatFileColumnSet	columnSet
static String	LOG_DIR
static int	MAX_ROW_ERROR_TEXT_WIDTH
(package private) FlatFileParams	params
private FlatFileParams.SchemaType	schemaType

Fields inherited from class org.eigenbase.rel.TableAccessRelBase

connection, table

Fields inherited from class org.eigenbase.rel.AbstractRelNode

digest, id, rowType, traits

Fields inherited from interface net.sf.farrago.query.FennelRel

FENNEL_EXEC_CONVENTION

Fields inherited from interface org.eigenbase.rel.RelNode

emptyArray

Constructor Summary

protected	FlatFileFennelRel(FlatFileColumnSet columnSet, RelOptCluster cluster, RelOptConnection connection, FlatFileParams.SchemaType schemaType, FlatFileParams params)
protected	FlatFileFennelRel(FlatFileColumnSet columnSet, RelOptCluster cluster, RelOptConnection connection, FlatFileParams.SchemaType schemaType, FlatFileParams params, RelDataType rowType)

Method Summary

FlatFileFennelRel	clone() Clones this RelNode.
private String	encodeChar(char c)
RelFieldCollation[]	getCollations() TODO: jhyde, 2006/3/28: unify with RelNode.getCollationList()
Object	implementFennelChild(FennelRelImplementor implementor) Visits this relational expression as part of the implementation process.
FemExecutionStreamDef	toStreamDef(FennelRelImplementor implementor) Converts this relational expression to FemExecutionStreamDef form.

Methods inherited from class org.eigenbase.rel.TableAccessRelBase

computeSelfCost, deriveRowType, explain, getCollationList, getConnection, getRows, getTable

Methods inherited from class org.eigenbase.rel.AbstractRelNode

childrenAccept, cloneTraits, collectVariablesSet, collectVariablesUsed, computeDigest, getChildExps, getCluster, getConvention, getCorrelVariable, getDescription, getDigest, getExpectedInputRowType, getId, getInput, getInputs, getOrCreateCorrelVariable, getQuery, getRelTypeName, getRowType, getTraits, getVariablesStopped, inheritTraitsFrom, isAccessTo, isDistinct, isValid, onRegister, recomputeDigest, register, registerCorrelVariable, replaceInput, setCorrelVariable, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eigenbase.rel.RelNode

childrenAccept, collectVariablesSet, collectVariablesUsed, computeSelfCost, explain, getChildExps, getCluster, getCollationList, getConvention, getCorrelVariable, getDescription, getDigest, getExpectedInputRowType, getId, getInput, getInputs, getOrCreateCorrelVariable, getQuery, getRelTypeName, getRows, getRowType, getTable, getTraits, getVariablesStopped, isAccessTo, isDistinct, isValid, onRegister, recomputeDigest, registerCorrelVariable, replaceInput, setCorrelVariable

Field Detail

LOG_DIR

public static final String LOG_DIR

See Also:

Constant Field Values

MAX_ROW_ERROR_TEXT_WIDTH

public static final int MAX_ROW_ERROR_TEXT_WIDTH

See Also:

Constant Field Values

columnSet

private FlatFileColumnSet columnSet

schemaType

private FlatFileParams.SchemaType schemaType

params

FlatFileParams params

Constructor Detail

FlatFileFennelRel

protected FlatFileFennelRel(FlatFileColumnSet columnSet,
                            RelOptCluster cluster,
                            RelOptConnection connection,
                            FlatFileParams.SchemaType schemaType,
                            FlatFileParams params)

FlatFileFennelRel

protected FlatFileFennelRel(FlatFileColumnSet columnSet,
                            RelOptCluster cluster,
                            RelOptConnection connection,
                            FlatFileParams.SchemaType schemaType,
                            FlatFileParams params,
                            RelDataType rowType)

Method Detail

implementFennelChild

public Object implementFennelChild(FennelRelImplementor implementor)

Description copied from interface: FennelRel

Visits this relational expression as part of the implementation process. Fennel relational expressions are implemented in a two-phase process: first call this method, then call FennelRel.toStreamDef(net.sf.farrago.query.FennelRelImplementor).

Specified by:

implementFennelChild in interface FennelRel

toStreamDef

public FemExecutionStreamDef toStreamDef(FennelRelImplementor implementor)

Description copied from interface: FennelRel

Converts this relational expression to FemExecutionStreamDef form. In the process, the relational expression will almost certainly call FennelRelImplementor.visitFennelChild(net.sf.farrago.query.FennelRel, int) on each of its children.

Specified by:

toStreamDef in interface FennelRel

Parameters:

implementor - for generating Java code

Returns:

generated FemExecutionStreamDef

encodeChar

private String encodeChar(char c)

getCollations

public RelFieldCollation[] getCollations()

Description copied from interface: FennelRel

TODO: jhyde, 2006/3/28: unify with RelNode.getCollationList()

Specified by:

getCollations in interface FennelRel

Returns:

the sort order produced by this FennelRel, or an empty array if the output is not guaranteed to be in any particular order.

clone

public FlatFileFennelRel clone()

Description copied from interface: RelNode

Clones this RelNode.

Traits of the RelNode must be explicitly cloned, using AbstractRelNode.inheritTraitsFrom(AbstractRelNode), as the RelNode may have traits of which it has no knowledge. Example implementation:

     public MyRelNode clone()
     {
         MyRelNode clone = new MyRelNode(...);
         clone.inheritTraitsFrom(this);
         return clone;
     }
 

N.B.: This method must be overridden whenever an existing, concrete RelNode is extended. Otherwise, calling clone() will produce a differently typed RelNode, resulting in invalid or incorrect query plans.

Specified by:

clone in interface RelNode

Overrides:

clone in class TableAccessRelBase

Returns:

a clone of this RelNode