org.apache.cassandra.cql3.selection

Interface Selectable

All Superinterfaces:

AssignmentTestable

All Known Implementing Classes:

ColumnDefinition, Selectable.WithCast, Selectable.WithFieldSelection, Selectable.WithFunction, Selectable.WithTerm, Selectable.WithToJSonFunction, Selectable.WritetimeOrTTL

public interface Selectable
extends AssignmentTestable

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	Selectable.Raw
static class	Selectable.WithCast
static class	Selectable.WithFieldSelection
static class	Selectable.WithFunction
static class	Selectable.WithTerm
static class	Selectable.WithToJSonFunction
static class	Selectable.WritetimeOrTTL

Nested classes/interfaces inherited from interface org.apache.cassandra.cql3.AssignmentTestable

AssignmentTestable.TestResult

Method Summary

Modifier and Type	Method and Description
default int	addAndGetIndex(ColumnDefinition def, java.util.List<ColumnDefinition> l)
AbstractType<?>	getExactTypeIfKnown(java.lang.String keyspace) The type of the Selectable if it can be infered.
Selector.Factory	newSelectorFactory(CFMetaData cfm, AbstractType<?> expectedType, java.util.List<ColumnDefinition> defs, VariableSpecifications boundNames)
default AssignmentTestable.TestResult	testAssignment(java.lang.String keyspace, ColumnSpecification receiver)

Method Detail

newSelectorFactory

Selector.Factory newSelectorFactory(CFMetaData cfm,
                                    AbstractType<?> expectedType,
                                    java.util.List<ColumnDefinition> defs,
                                    VariableSpecifications boundNames)

getExactTypeIfKnown

AbstractType<?> getExactTypeIfKnown(java.lang.String keyspace)

The type of the Selectable if it can be infered.

Parameters:

keyspace - the keyspace on which the statement for which this is a Selectable is on.

Returns:

the type of this Selectable if inferrable, or null otherwise (for instance, the type isn't inferable for a bind marker. Even for literals, the exact type is not inferrable since they are valid for many different types and so this will return null too).

testAssignment

default AssignmentTestable.TestResult testAssignment(java.lang.String keyspace,
                                                     ColumnSpecification receiver)

Specified by:

testAssignment in interface AssignmentTestable

Returns:

whether this object can be assigned to the provided receiver. We distinguish between 3 values: - EXACT_MATCH if this object is exactly of the type expected by the receiver - WEAKLY_ASSIGNABLE if this object is not exactly the expected type but is assignable nonetheless - NOT_ASSIGNABLE if it's not assignable Most caller should just call the isAssignable() method on the result, though functions have a use for testing "strong" equality to decide the most precise overload to pick when multiple could match.

addAndGetIndex

default int addAndGetIndex(ColumnDefinition def,
                           java.util.List<ColumnDefinition> l)