net.sf.saffron.sql
Class SqlJoinOperator

java.lang.Object
  |
  +--net.sf.saffron.sql.SqlOperator
        |
        +--net.sf.saffron.sql.SqlJoinOperator

public class SqlJoinOperator

extends SqlOperator

SqlJoinOperator describes the syntax of the SQL JOIN operator. Since there is only one such operator, this class is almost certainly a singleton.

Since:

Mar 19, 2003

Version:

$Id: //open/saffron/src/net/sf/saffron/sql/SqlJoinOperator.java#4 $

Author:

jhyde

Nested Class Summary

static class	SqlJoinOperator.ConditionType Enumerates the types of condition in a join expression.
static class	SqlJoinOperator.JoinType Enumerates the types of join.

Nested classes inherited from class net.sf.saffron.sql.SqlOperator

SqlOperator.Syntax, SqlOperator.TypeInference

Field Summary

static int	CONDITION_OPERAND
static int	CONDITION_TYPE_OPERAND Value must be a SqlLiteral, one of the integer codes for SqlJoinOperator.ConditionType.
static int	IS_NATURAL_OPERAND One of the following: SqlLiteral.True, SqlLiteral.False.
static int	LEFT_OPERAND
static int	RIGHT_OPERAND
static int	TYPE_OPERAND Value must be a SqlLiteral, one of the integer codes for SqlJoinOperator.JoinType.

Fields inherited from class net.sf.saffron.sql.SqlOperator

kind, leftPrec, name, rightPrec

Constructor Summary

SqlJoinOperator()

Method Summary

SqlCall	createCall(SqlNode[] operands) Creates a call to this operand with an array of operands.
SqlCall	createCall(SqlNode left, SqlLiteral isNatural, SqlLiteral joinType, SqlNode right, SqlLiteral conditionType, SqlNode condition)
int	getSyntax() Returns the syntactic type of this operator, a value from SqlOperator.Syntax.
(package private) void	unparse(SqlWriter writer, SqlNode[] operands, int leftPrec, int rightPrec) Writes a SQL representation of a call to this operator to a writer, including parentheses if the operators on either side are of greater precedence.

Methods inherited from class net.sf.saffron.sql.SqlOperator

createCall, createCall, createCall, createCall, getType, getType, isA, toString

Methods inherited from class java.lang.Object

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

Field Detail

LEFT_OPERAND

public static final int LEFT_OPERAND

See Also:

Constant Field Values

IS_NATURAL_OPERAND

public static final int IS_NATURAL_OPERAND

One of the following: SqlLiteral.True, SqlLiteral.False.

See Also:

Constant Field Values

TYPE_OPERAND

public static final int TYPE_OPERAND

Value must be a SqlLiteral, one of the integer codes for SqlJoinOperator.JoinType.

See Also:

Constant Field Values

RIGHT_OPERAND

public static final int RIGHT_OPERAND

See Also:

Constant Field Values

CONDITION_TYPE_OPERAND

public static final int CONDITION_TYPE_OPERAND

Value must be a SqlLiteral, one of the integer codes for SqlJoinOperator.ConditionType.

See Also:

Constant Field Values

CONDITION_OPERAND

public static final int CONDITION_OPERAND

See Also:

Constant Field Values

Constructor Detail

SqlJoinOperator

public SqlJoinOperator()

Method Detail

getSyntax

public int getSyntax()

Description copied from class: SqlOperator

Returns the syntactic type of this operator, a value from SqlOperator.Syntax.

Specified by:

getSyntax in class SqlOperator

createCall

public SqlCall createCall(SqlNode[] operands)

Description copied from class: SqlOperator

Creates a call to this operand with an array of operands.

Overrides:

createCall in class SqlOperator

createCall

public SqlCall createCall(SqlNode left,
                          SqlLiteral isNatural,
                          SqlLiteral joinType,
                          SqlNode right,
                          SqlLiteral conditionType,
                          SqlNode condition)

unparse

void unparse(SqlWriter writer,
             SqlNode[] operands,
             int leftPrec,
             int rightPrec)

Description copied from class: SqlOperator

Writes a SQL representation of a call to this operator to a writer, including parentheses if the operators on either side are of greater precedence.

Specified by:

unparse in class SqlOperator