org.datanucleus.store.rdbms.sql.expression
Class NumericExpression

java.lang.Object
  org.datanucleus.store.rdbms.sql.expression.SQLExpression
      org.datanucleus.store.rdbms.sql.expression.NumericExpression

Direct Known Subclasses:

AggregateNumericExpression, ByteExpression, ByteLiteral, FloatingPointLiteral, IntegerLiteral, NumericSubqueryExpression

public class NumericExpression
extends SQLExpression

Representation of a Numeric expression in an SQL statement.

Nested Class Summary

Nested classes/interfaces inherited from class org.datanucleus.store.rdbms.sql.expression.SQLExpression

SQLExpression.ColumnExpressionList

Field Summary

Fields inherited from class org.datanucleus.store.rdbms.sql.expression.SQLExpression

LOCALISER, lowestOperator, mapping, parameterName, st, stmt, subExprs, table

Constructor Summary

NumericExpression(org.datanucleus.query.expression.Expression.MonadicOperator op, SQLExpression expr1)
Perform an operation

NumericExpression(SQLExpression expr1, org.datanucleus.query.expression.Expression.DyadicOperator op, SQLExpression expr2)
Perform an operation

NumericExpression(SQLStatement stmt, org.datanucleus.store.mapped.mapping.JavaTypeMapping mapping, String sql)
Constructor for a numeric expression for the specified mapping using the specified SQL text.

NumericExpression(SQLStatement stmt, org.datanucleus.store.mapped.mapping.JavaTypeMapping mapping, String functionName, List args)
Generates statement as "FUNCTION_NAME(arg [,argN])".

NumericExpression(SQLStatement stmt, org.datanucleus.store.mapped.mapping.JavaTypeMapping mapping, String functionName, List args, List types)
Generates statement as "FUNCTION_NAME(arg [AS type] [,argN [AS typeN]])".

NumericExpression(SQLStatement stmt, SQLTable table, org.datanucleus.store.mapped.mapping.JavaTypeMapping mapping)
Constructor for a numeric expression for the mapping in the specified table.

Method Summary

SQLExpression	add(SQLExpression expr) Additive Operator.
SQLExpression	com() Bitwise Complement Operator
SQLExpression	div(SQLExpression expr) Division Operator.
BooleanExpression	eq(SQLExpression expr) Equality operator (equals to)
BooleanExpression	ge(SQLExpression expr) Relational operator (greater than or equals)
BooleanExpression	gt(SQLExpression expr) Relational operator (greater than)
BooleanExpression	in(SQLExpression expr, boolean not) In expression.
BooleanExpression	le(SQLExpression expr) Relational operator (lower than or equals)
BooleanExpression	lt(SQLExpression expr) Relational operator (lower than)
SQLExpression	mod(SQLExpression expr) Method to return a modulus expression.
SQLExpression	mul(SQLExpression expr) Multiplication Operator
BooleanExpression	ne(SQLExpression expr) Not equality operator (not equals to)
SQLExpression	neg() Unary Minus Operator
SQLExpression	sub(SQLExpression expr) Additive Operator.

Methods inherited from class org.datanucleus.store.rdbms.sql.expression.SQLExpression

and, cast, distinct, encloseInParentheses, eor, getJavaTypeMapping, getLowestOperator, getNumberOfSubExpressions, getParameterName, getSQLStatement, getSQLTable, getSubExpression, invoke, ior, is, isParameter, not, setJavaTypeMapping, toSQLText

Methods inherited from class java.lang.Object

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

Constructor Detail

NumericExpression

public NumericExpression(SQLStatement stmt,
                         org.datanucleus.store.mapped.mapping.JavaTypeMapping mapping,
                         String sql)

Constructor for a numeric expression for the specified mapping using the specified SQL text.

Parameters:

stmt - The statement

mapping - the mapping associated to this expression

sql - The SQL text that will return a numeric

NumericExpression

public NumericExpression(SQLStatement stmt,
                         SQLTable table,
                         org.datanucleus.store.mapped.mapping.JavaTypeMapping mapping)

Constructor for a numeric expression for the mapping in the specified table.

Parameters:

stmt - the SQLStatement

table - the table where this expression refers to

mapping - the mapping associated to this expression

NumericExpression

public NumericExpression(org.datanucleus.query.expression.Expression.MonadicOperator op,
                         SQLExpression expr1)

Perform an operation

op

on expression

expr1

.

Parameters:

op - operator

expr1 - operand

NumericExpression

public NumericExpression(SQLExpression expr1,
                         org.datanucleus.query.expression.Expression.DyadicOperator op,
                         SQLExpression expr2)

Perform an operation

op

between

expr1

and

expr2

.

Parameters:

expr1 - the first expression

op - the operator between operands

expr2 - the second expression

NumericExpression

public NumericExpression(SQLStatement stmt,
                         org.datanucleus.store.mapped.mapping.JavaTypeMapping mapping,
                         String functionName,
                         List args)

Generates statement as "FUNCTION_NAME(arg [,argN])".

Parameters:

stmt - The statement

mapping - Mapping to use

functionName - Name of function

args - SQLExpression list

NumericExpression

public NumericExpression(SQLStatement stmt,
                         org.datanucleus.store.mapped.mapping.JavaTypeMapping mapping,
                         String functionName,
                         List args,
                         List types)

Generates statement as "FUNCTION_NAME(arg [AS type] [,argN [AS typeN]])".

Parameters:

stmt - The statement

mapping - Mapping to use

functionName - Name of function

args - SQLExpression list

types - Optional String/SQLExpression list of types for the args

Method Detail

eq

public BooleanExpression eq(SQLExpression expr)

Description copied from class: SQLExpression

Equality operator (equals to)

Overrides:

eq in class SQLExpression

Parameters:

expr - the right-hand operand

Returns:

The type of an equality expression is a boolean

ne

public BooleanExpression ne(SQLExpression expr)

Description copied from class: SQLExpression

Not equality operator (not equals to)

Overrides:

ne in class SQLExpression

Parameters:

expr - the right-hand operand

Returns:

The type of an equality expression is a boolean

lt

public BooleanExpression lt(SQLExpression expr)

Description copied from class: SQLExpression

Relational operator (lower than)

Overrides:

lt in class SQLExpression

Parameters:

expr - the right-hand operand

Returns:

true if the value of the left-hand operand is less than the value of the right-hand operand, and otherwise is false.

le

public BooleanExpression le(SQLExpression expr)

Description copied from class: SQLExpression

Relational operator (lower than or equals)

Overrides:

le in class SQLExpression

Parameters:

expr - the right-hand operand

Returns:

true if the value of the left-hand operand is less than or equal to the value of the right-hand operand, and otherwise is false.

gt

public BooleanExpression gt(SQLExpression expr)

Description copied from class: SQLExpression

Relational operator (greater than)

Overrides:

gt in class SQLExpression

Parameters:

expr - the right-hand operand

Returns:

true if the value of the left-hand operand is greater than the value of the right-hand operand, and otherwise is false.

ge

public BooleanExpression ge(SQLExpression expr)

Description copied from class: SQLExpression

Relational operator (greater than or equals)

Overrides:

ge in class SQLExpression

Parameters:

expr - the right-hand operand

Returns:

true if the value of the left-hand operand is greater than or equal the value of the right-hand operand, and otherwise is false.

in

public BooleanExpression in(SQLExpression expr,
                            boolean not)

Description copied from class: SQLExpression

In expression. Return true if this is contained by expr

Overrides:

in in class SQLExpression

Parameters:

expr - the right-hand expression

not - Whether we really want "not in"

Returns:

true if the left-hand expression is contained by the right-hand expression. Otherwise the result is false.

add

public SQLExpression add(SQLExpression expr)

Description copied from class: SQLExpression

Additive Operator. The binary + operator performs addition when applied to two operands of numeric type, producing the sum of the operands. If the type of either operand of a + operator is String, then the operation is string concatenation.

Overrides:

add in class SQLExpression

Parameters:

expr - the right-hand operand

Returns:

If one of the operands is String, the returned value is the string concatenation; The sum of two operands of numeric type. The left-hand operand is the minuend and the right-hand operand is the subtrahend;

sub

public SQLExpression sub(SQLExpression expr)

Description copied from class: SQLExpression

Additive Operator. The binary - operator subtracts right-hand operand from left-hand operand.

Overrides:

sub in class SQLExpression

Parameters:

expr - the right-hand operand

Returns:

The binary - operator performs subtraction when applied to two operands of numeric type producing the difference of its operands; the left-hand operand is the minuend and the right-hand operand is the subtrahend.

mul

public SQLExpression mul(SQLExpression expr)

Description copied from class: SQLExpression

Multiplication Operator

Overrides:

mul in class SQLExpression

Parameters:

expr - the right-hand operator

Returns:

The binary * operator performs multiplication, producing the product of its operands.

div

public SQLExpression div(SQLExpression expr)

Description copied from class: SQLExpression

Division Operator. The left-hand operand is the dividend and the right-hand operand is the divisor.

Overrides:

div in class SQLExpression

Parameters:

expr - the right-hand operator

Returns:

The binary / operator performs division, producing the quotient of its operands

mod

public SQLExpression mod(SQLExpression expr)

Method to return a modulus expression.

Overrides:

mod in class SQLExpression

Parameters:

expr - The expression to modulus against

Returns:

The modulus expression

neg

public SQLExpression neg()

Description copied from class: SQLExpression

Unary Minus Operator

Overrides:

neg in class SQLExpression

Returns:

the type of the unary minus expression is the promoted type of the operand.

com

public SQLExpression com()

Description copied from class: SQLExpression

Bitwise Complement Operator

Overrides:

com in class SQLExpression

Returns:

the type of the unary bitwise complement expression is the promoted type of the operand.