Class CharacterExpression
java.lang.Object
org.datanucleus.store.rdbms.sql.expression.SQLExpression
org.datanucleus.store.rdbms.sql.expression.CharacterExpression
- Direct Known Subclasses:
CharacterLiteral
Representation of a Character expression in a Query
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Nested Class Summary
Nested classes/interfaces inherited from class org.datanucleus.store.rdbms.sql.expression.SQLExpression
SQLExpression.ColumnExpressionList
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Field Summary
Fields inherited from class org.datanucleus.store.rdbms.sql.expression.SQLExpression
lowestOperator, mapping, parameterName, st, stmt, subExprs, table
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Constructor Summary
ConstructorsConstructorDescriptionCharacterExpression
(SQLStatement stmt, JavaTypeMapping mapping, String functionName, List args) Generates statement as e.g.CharacterExpression
(SQLStatement stmt, JavaTypeMapping mapping, String functionName, List args, List types) Generates statement as e.g.CharacterExpression
(SQLStatement stmt, SQLTable table, JavaTypeMapping mapping) Constructor for an SQL expression for a (field) mapping in a specified table. -
Method Summary
Modifier and TypeMethodDescriptionadd
(SQLExpression expr) Additive Operator.com()
Bitwise Complement Operatordiv
(SQLExpression expr) Division Operator.eq
(SQLExpression expr) Equality operator (equals to)ge
(SQLExpression expr) Relational operator (greater than or equals)gt
(SQLExpression expr) Relational operator (greater than)in
(SQLExpression expr, boolean not) In expression.Invocation of a method on this expression.le
(SQLExpression expr) Relational operator (lower than or equals)lt
(SQLExpression expr) Relational operator (lower than)mod
(SQLExpression expr) Method to return a modulus expression.mul
(SQLExpression expr) Multiplication Operatorne
(SQLExpression expr) Not equality operator (not equals to)neg()
Unary Minus Operatorsub
(SQLExpression expr) Additive Operator.Methods inherited from class org.datanucleus.store.rdbms.sql.expression.SQLExpression
and, bitAnd, bitOr, cast, distinct, encloseInParentheses, eor, getJavaTypeMapping, getLowestOperator, getNumberOfSubExpressions, getParameterName, getSQLStatement, getSQLTable, getSubExpression, ior, is, isParameter, not, setJavaTypeMapping, toSQLText, unDistinct
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Constructor Details
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CharacterExpression
Constructor for an SQL expression for a (field) mapping in a specified table.- Parameters:
stmt
- The statementtable
- The table in the statementmapping
- The mapping for the field
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CharacterExpression
public CharacterExpression(SQLStatement stmt, JavaTypeMapping mapping, String functionName, List args) Generates statement as e.g. FUNCTION_NAME(arg[,argN]). The function returns a character value. This is used where we are invoking some SQL function and it returns a character.- Parameters:
stmt
- SQL Statementmapping
- Mapping to usefunctionName
- Name of the functionargs
- SQLExpression list
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CharacterExpression
public CharacterExpression(SQLStatement stmt, JavaTypeMapping mapping, String functionName, List args, List types) Generates statement as e.g. FUNCTION_NAME(arg [AS type] [,argN [AS type]]). The function returns a character value. This is used where we are invoking some SQL function and it returns a character.- Parameters:
stmt
- SQL Statementmapping
- Mapping to usefunctionName
- Name of the functionargs
- SQLExpression listtypes
- Optional types list for the args
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Method Details
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eq
Description copied from class:SQLExpression
Equality operator (equals to)- Overrides:
eq
in classSQLExpression
- Parameters:
expr
- the right-hand operand- Returns:
- The type of an equality expression is a boolean
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ne
Description copied from class:SQLExpression
Not equality operator (not equals to)- Overrides:
ne
in classSQLExpression
- Parameters:
expr
- the right-hand operand- Returns:
- The type of an equality expression is a boolean
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lt
Description copied from class:SQLExpression
Relational operator (lower than)- Overrides:
lt
in classSQLExpression
- 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.
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le
Description copied from class:SQLExpression
Relational operator (lower than or equals)- Overrides:
le
in classSQLExpression
- 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.
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gt
Description copied from class:SQLExpression
Relational operator (greater than)- Overrides:
gt
in classSQLExpression
- 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.
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ge
Description copied from class:SQLExpression
Relational operator (greater than or equals)- Overrides:
ge
in classSQLExpression
- 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.
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add
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 classSQLExpression
- 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;
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sub
Description copied from class:SQLExpression
Additive Operator. The binary - operator subtracts right-hand operand from left-hand operand.- Overrides:
sub
in classSQLExpression
- 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.
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mul
Description copied from class:SQLExpression
Multiplication Operator- Overrides:
mul
in classSQLExpression
- Parameters:
expr
- the right-hand operator- Returns:
- The binary * operator performs multiplication, producing the product of its operands.
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div
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 classSQLExpression
- Parameters:
expr
- the right-hand operator- Returns:
- The binary / operator performs division, producing the quotient of its operands
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mod
Method to return a modulus expression.- Overrides:
mod
in classSQLExpression
- Parameters:
expr
- The expression to modulus against- Returns:
- The modulus expression
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neg
Description copied from class:SQLExpression
Unary Minus Operator- Overrides:
neg
in classSQLExpression
- Returns:
- the type of the unary minus expression is the promoted type of the operand.
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com
Description copied from class:SQLExpression
Bitwise Complement Operator- Overrides:
com
in classSQLExpression
- Returns:
- the type of the unary bitwise complement expression is the promoted type of the operand.
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in
Description copied from class:SQLExpression
In expression. Return true if this is contained byexpr
- Overrides:
in
in classSQLExpression
- Parameters:
expr
- the right-hand expressionnot
- 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.
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invoke
Description copied from class:SQLExpression
Invocation of a method on this expression.- Overrides:
invoke
in classSQLExpression
- Parameters:
methodName
- name of the method to invokeargs
- Args to this method (if any)- Returns:
- the converted value
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