com.lucidera.query
Class LucidDbSpecialOperators

java.lang.Object
  com.lucidera.query.LucidDbSpecialOperators

public class LucidDbSpecialOperators
extends Object

LucidDbSpecialOperators maintains information about builtin operators that require special handling, e.g., LCS_RID

Version:

$Id: //open/dev/farrago/src/com/lucidera/query/LucidDbSpecialOperators.java#9 $

Author:

Zelaine Fong

Nested Class Summary

private class

LucidDbSpecialOperators.SpecialOperatorInfo

Field Summary

private Map<Integer,LucidDbSpecialOperators.SpecialOperatorInfo>	colIdMap Maps the special column id representing a special operator to the object containing information about the operator
private static int	LcsRidColumnId Special column id values.
private Set<SqlOperator>	specialOperators List of the special operators
private Map<SqlOperator,LucidDbSpecialOperators.SpecialOperatorInfo>	sqlOpMap Maps the special operator to an object containing information about the operator

Constructor Summary

LucidDbSpecialOperators()

Method Summary

Integer	getSpecialOpColumnId(SqlOperator op)
Set<SqlOperator>	getSpecialOperators()
String	getSpecialOpName(int colId)
String	getSpecialOpName(SqlOperator op)
SqlTypeName	getSpecialOpRetTypeName(int colId)
static boolean	isLcsRidColumnId(int colId)
Boolean	isNullable(int colId)
boolean	isSpecialColumnId(int colId)
boolean	isSpecialOperator(SqlOperator op)
static RexNode	makeRidExpr(RexBuilder rexBuilder, RelNode rel)
static RexNode	makeRidExpr(RexBuilder rexBuilder, RelNode rel, int fieldNo) Creates an expression corresponding to an lcs rid

Methods inherited from class java.lang.Object

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

Field Detail

LcsRidColumnId

private static final int LcsRidColumnId

Special column id values. Additional values should be appended here with sequential id values.

See Also:

Constant Field Values

specialOperators

private Set<SqlOperator> specialOperators

List of the special operators

sqlOpMap

private Map<SqlOperator,LucidDbSpecialOperators.SpecialOperatorInfo> sqlOpMap

Maps the special operator to an object containing information about the operator

colIdMap

private Map<Integer,LucidDbSpecialOperators.SpecialOperatorInfo> colIdMap

Maps the special column id representing a special operator to the object containing information about the operator

Constructor Detail

LucidDbSpecialOperators

public LucidDbSpecialOperators()

Method Detail

getSpecialOperators

public Set<SqlOperator> getSpecialOperators()

isSpecialOperator

public boolean isSpecialOperator(SqlOperator op)

isSpecialColumnId

public boolean isSpecialColumnId(int colId)

getSpecialOpName

public String getSpecialOpName(SqlOperator op)

getSpecialOpName

public String getSpecialOpName(int colId)

getSpecialOpRetTypeName

public SqlTypeName getSpecialOpRetTypeName(int colId)

getSpecialOpColumnId

public Integer getSpecialOpColumnId(SqlOperator op)

isNullable

public Boolean isNullable(int colId)

isLcsRidColumnId

public static boolean isLcsRidColumnId(int colId)

makeRidExpr

public static RexNode makeRidExpr(RexBuilder rexBuilder,
                                  RelNode rel,
                                  int fieldNo)

Creates an expression corresponding to an lcs rid

Parameters:

rexBuilder - rex builder used to create the expression

rel - the relnode that the rid expression corresponds to

fieldNo - field in the relnode to use as the argument to the rid expression

Returns:

the rid expression

makeRidExpr

public static RexNode makeRidExpr(RexBuilder rexBuilder,
                                  RelNode rel)