com.splicemachine.db.impl.sql.compile

Class DateTypeCompiler

java.lang.Object

com.splicemachine.db.impl.sql.compile.BaseTypeCompiler

com.splicemachine.db.impl.sql.compile.DateTypeCompiler

All Implemented Interfaces:

TypeCompiler

public class DateTypeCompiler
extends BaseTypeCompiler

Field Summary

Fields inherited from class com.splicemachine.db.impl.sql.compile.BaseTypeCompiler

correspondingTypeId

Fields inherited from interface com.splicemachine.db.iapi.sql.compile.TypeCompiler

AVG_OP, BOOLEAN_MAXWIDTH_AS_CHAR, DEFAULT_DECIMAL_PRECISION, DEFAULT_DECIMAL_SCALE, DIVIDE_OP, DOUBLE_MAXWIDTH_AS_CHAR, INT_MAXWIDTH_AS_CHAR, LONGINT_MAXWIDTH_AS_CHAR, MAX_DECIMAL_PRECISION_SCALE, MINUS_OP, MOD_OP, PLUS_OP, REAL_MAXWIDTH_AS_CHAR, SMALLINT_MAXWIDTH_AS_CHAR, SUM_OP, TIMES_OP, TINYINT_MAXWIDTH_AS_CHAR

Constructor Summary

Constructors

Constructor and Description
DateTypeCompiler()

Method Summary

Modifier and Type	Method and Description
boolean	compatible(TypeId otherType) Tell whether this type (date) is compatible with the given type.
boolean	convertible(TypeId otherType, boolean forDataTypeFunction) User types are convertible to other user types only if (for now) they are the same type and are being used to implement some JDBC type.
int	getCastToCharWidth(DataTypeDescriptor dts) Return the maximum width for this data type when cast to a char type.
java.lang.String	getCorrespondingPrimitiveTypeName() Get the name of the corresponding Java type.
java.lang.String	interfaceName() Get the name of the interface for this type.
(package private) java.lang.String	nullMethodName() Return the method name to get a Derby DataValueDescriptor object of the correct type set to SQL NULL.
DataTypeDescriptor	resolveArithmeticOperation(DataTypeDescriptor leftType, DataTypeDescriptor rightType, java.lang.String operator) Type resolution methods on binary operators
boolean	storable(TypeId otherType, ClassFactory cf) User types are storable into other user types that they are assignable to.

Methods inherited from class com.splicemachine.db.impl.sql.compile.BaseTypeCompiler

dataValueMethodName, generateDataValue, generateNull, getPrimitiveMethodName, getStoredFormatIdFromTypeId, getTypeCompiler, getTypeId, numberConvertible, numberStorable, pushCollationForDataValue, setTypeId, userTypeStorable

Methods inherited from class java.lang.Object

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

Constructor Detail

DateTypeCompiler

public DateTypeCompiler()

Method Detail

convertible

public boolean convertible(TypeId otherType,
                           boolean forDataTypeFunction)

User types are convertible to other user types only if (for now) they are the same type and are being used to implement some JDBC type. This is sufficient for date/time types; it may be generalized later for e.g. comparison of any user type with one of its subtypes.

Parameters:

otherType - The CompilationType of the other type to compare this type to

forDataTypeFunction - true if this is a type function that requires more liberal behavior (e.g DOUBLE can convert a char but you cannot cast a CHAR to double.

Returns:

true if the types can be converted, false if conversion is not allowed

See Also:

TypeCompiler.convertible(com.splicemachine.db.iapi.types.TypeId, boolean)

compatible

public boolean compatible(TypeId otherType)

Tell whether this type (date) is compatible with the given type.

Parameters:

otherType - The TypeId of the other type.

Returns:

true if the types are compatible, false if not compatible

storable

public boolean storable(TypeId otherType,
                        ClassFactory cf)

User types are storable into other user types that they are assignable to. The other type must be a subclass of this type, or implement this type as one of its interfaces. Built-in types are also storable into user types when the built-in type's corresponding Java type is assignable to the user type.

Parameters:

otherType - the type of the instance to store into this type.

cf - A ClassFactory

Returns:

true if otherType is storable into this type, else false.

interfaceName

public java.lang.String interfaceName()

Description copied from interface: TypeCompiler

Get the name of the interface for this type. For example, the interface for a SQLInteger is NumberDataValue. The full path name of the type is returned.

Returns:

The name of the interface for this type.

See Also:

TypeCompiler.interfaceName()

getCorrespondingPrimitiveTypeName

public java.lang.String getCorrespondingPrimitiveTypeName()

Description copied from interface: TypeCompiler

Get the name of the corresponding Java type. For numerics and booleans we will get the corresponding Java primitive type. e Each SQL type has a corresponding Java type. When a SQL value is passed to a Java method, it is translated to its corresponding Java type. For example, a SQL Integer will be mapped to a Java int, but a SQL date will be mapped to a java.sql.Date.

Returns:

The name of the corresponding Java primitive type.

See Also:

TypeCompiler.getCorrespondingPrimitiveTypeName()

getCastToCharWidth

public int getCastToCharWidth(DataTypeDescriptor dts)

Description copied from interface: TypeCompiler

Return the maximum width for this data type when cast to a char type.

Parameters:

dts - The associated DataTypeDescriptor for this TypeId.

Returns:

int The maximum width for this data type when cast to a char type.

See Also:

TypeCompiler.getCastToCharWidth(com.splicemachine.db.iapi.types.DataTypeDescriptor)

nullMethodName

java.lang.String nullMethodName()

Description copied from class: BaseTypeCompiler

Return the method name to get a Derby DataValueDescriptor object of the correct type set to SQL NULL. The method named will be called with one argument: a holder object if pushCollationForDataValue() returns false, otherwise two arguments, the second being the collationType.

Specified by:

nullMethodName in class BaseTypeCompiler

resolveArithmeticOperation

public DataTypeDescriptor resolveArithmeticOperation(DataTypeDescriptor leftType,
                                                     DataTypeDescriptor rightType,
                                                     java.lang.String operator)
                                              throws StandardException

Description copied from interface: TypeCompiler

Type resolution methods on binary operators

Specified by:

resolveArithmeticOperation in interface TypeCompiler

Overrides:

resolveArithmeticOperation in class BaseTypeCompiler

Parameters:

leftType - The type of the left parameter

rightType - The type of the right parameter

operator - The name of the operator (e.g. "+").

Returns:

The type of the result

Throws:

StandardException - Thrown on error

See Also:

TypeCompiler.resolveArithmeticOperation(com.splicemachine.db.iapi.types.DataTypeDescriptor, com.splicemachine.db.iapi.types.DataTypeDescriptor, java.lang.String)