Class FloatType
- java.lang.Object
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- org.apache.flink.table.types.logical.LogicalType
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- org.apache.flink.table.types.logical.FloatType
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- All Implemented Interfaces:
Serializable
@PublicEvolving public final class FloatType extends LogicalType
Logical type of a 4-byte single precision floating point number. Compared to the SQL standard, the type does not take parameters.The serialized string representation is
FLOAT
.- See Also:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description static int
PRECISION
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description <R> R
accept(LogicalTypeVisitor<R> visitor)
String
asSerializableString()
Returns a string that fully serializes this instance.LogicalType
copy(boolean isNullable)
Returns a deep copy of this type with possibly different nullability.List<LogicalType>
getChildren()
Class<?>
getDefaultConversion()
Returns the default conversion class.boolean
supportsInputConversion(Class<?> clazz)
Returns whether an instance of the given class can be represented as a value of this logical type when entering the table ecosystem.boolean
supportsOutputConversion(Class<?> clazz)
Returns whether a value of this logical type can be represented as an instance of the given class when leaving the table ecosystem.-
Methods inherited from class org.apache.flink.table.types.logical.LogicalType
asSummaryString, conversionSet, copy, equals, getTypeRoot, hashCode, is, is, isAnyOf, isAnyOf, isNullable, toString, withNullability
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Field Detail
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PRECISION
public static final int PRECISION
- See Also:
- Constant Field Values
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Method Detail
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copy
public LogicalType copy(boolean isNullable)
Description copied from class:LogicalType
Returns a deep copy of this type with possibly different nullability.- Specified by:
copy
in classLogicalType
- Parameters:
isNullable
- the intended nullability of the copied type- Returns:
- a deep copy
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asSerializableString
public String asSerializableString()
Description copied from class:LogicalType
Returns a string that fully serializes this instance. The serialized string can be used for transmitting or persisting a type.See
LogicalTypeParser
for the reverse operation.- Specified by:
asSerializableString
in classLogicalType
- Returns:
- detailed string for transmission or persistence
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supportsInputConversion
public boolean supportsInputConversion(Class<?> clazz)
Description copied from class:LogicalType
Returns whether an instance of the given class can be represented as a value of this logical type when entering the table ecosystem. This method helps for the interoperability between JVM-based languages and the relational type system.A supported conversion directly maps an input class to a logical type without loss of precision or type widening.
For example,
java.lang.Long
orlong
can be used as input forBIGINT
independent of the set nullability.- Specified by:
supportsInputConversion
in classLogicalType
- Parameters:
clazz
- input class to be converted into this logical type- Returns:
- flag that indicates if instances of this class can be used as input into the table ecosystem
- See Also:
LogicalType.getDefaultConversion()
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supportsOutputConversion
public boolean supportsOutputConversion(Class<?> clazz)
Description copied from class:LogicalType
Returns whether a value of this logical type can be represented as an instance of the given class when leaving the table ecosystem. This method helps for the interoperability between JVM-based languages and the relational type system.A supported conversion directly maps a logical type to an output class without loss of precision or type widening.
For example,
java.lang.Long
orlong
can be used as output forBIGINT
if the type is not nullable. If the type is nullable, onlyjava.lang.Long
can represent this.- Specified by:
supportsOutputConversion
in classLogicalType
- Parameters:
clazz
- output class to be converted from this logical type- Returns:
- flag that indicates if instances of this class can be used as output from the table ecosystem
- See Also:
LogicalType.getDefaultConversion()
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getDefaultConversion
public Class<?> getDefaultConversion()
Description copied from class:LogicalType
Returns the default conversion class. A value of this logical type is expected to be an instance of the given class when entering or is represented as an instance of the given class when leaving the table ecosystem if no other conversion has been specified.For example,
java.lang.Long
is the default input and output forBIGINT
.- Specified by:
getDefaultConversion
in classLogicalType
- Returns:
- default class to represent values of this logical type
- See Also:
LogicalType.supportsInputConversion(Class)
,LogicalType.supportsOutputConversion(Class)
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getChildren
public List<LogicalType> getChildren()
- Specified by:
getChildren
in classLogicalType
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accept
public <R> R accept(LogicalTypeVisitor<R> visitor)
- Specified by:
accept
in classLogicalType
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