org.apache.flink.table.planner.functions.casting

Interface CastRule<IN,OUT>

Type Parameters:

IN - Input internal type

OUT - Output internal type

All Known Subinterfaces:

CodeGeneratorCastRule<IN,OUT>, ExpressionCodeGeneratorCastRule<IN,OUT>

@Internal
public interface CastRule<IN,OUT>

A CastRule provides the logic to create a CastExecutor starting from the input and the target types. A rule is matched using CastRulePredicate.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	CastRule.Context Casting context.

Method Summary

Modifier and Type	Method and Description
boolean	canFail(LogicalType inputLogicalType, LogicalType targetLogicalType) Returns true if the CastExecutor can fail at runtime.
CastExecutor<IN,OUT>	create(CastRule.Context context, LogicalType inputLogicalType, LogicalType targetLogicalType) Create a CastExecutor starting from the provided input type.
CastRulePredicate	getPredicateDefinition()

Method Detail

getPredicateDefinition

CastRulePredicate getPredicateDefinition()

See Also:

for more details about a cast rule predicate definition.

create

CastExecutor<IN,OUT> create(CastRule.Context context,
                            LogicalType inputLogicalType,
                            LogicalType targetLogicalType)

Create a CastExecutor starting from the provided input type. The returned CastExecutor assumes the input value is using the internal data type, and it's a valid value for the provided targetLogicalType.

canFail

boolean canFail(LogicalType inputLogicalType,
                LogicalType targetLogicalType)

Returns true if the CastExecutor can fail at runtime.