com.holonplatform.core.datastore.relational

Interface SubQuery<T>

Type Parameters:

T - the type of the selection

All Superinterfaces:

DataTarget.DataTargetSupport<SubQuery<T>>, Expression, ExpressionResolver.ExpressionResolverBuilder<SubQuery<T>>, QueryAggregation.QueryAggregationSupport<SubQuery<T>>, QueryBuilder<SubQuery<T>>, QueryExpression<T>, QueryFilter.QueryFilterSupport<SubQuery<T>>, QuerySort.QuerySortSupport<SubQuery<T>>, TypedExpression<T>

public interface SubQuery<T>
extends QueryBuilder<SubQuery<T>>, QueryExpression<T>

Relational sub query QueryExpression.

This class implements QueryBuilder to build sub query using QueryFilters, QuerySorts and providing ExpressionResolver registration support.

Since:

5.0.0

Nested Class Summary

Nested classes/interfaces inherited from interface com.holonplatform.core.Expression

Expression.ExpressionResolverFunction<E extends Expression,R extends Expression>, Expression.InvalidExpressionException

Method Summary

Modifier and Type	Method and Description
static SubQuery<Integer>	create() Build a sub query with a default select 1 projection as selection.
static <T> SubQuery<T>	create(Class<? extends T> selectionType) Build a sub query with given selection type.
static SubQuery<Integer>	create(Datastore datastore) Deprecated. Datastore parameter is no longer required, use create() instead
static <T> SubQuery<T>	create(Datastore datastore, Class<? extends T> selectionType) Deprecated. Datastore parameter is no longer required, use create(Class) instead
static <T> SubQuery<T>	create(Datastore datastore, QueryProjection<T> selection) Deprecated. Datastore parameter is no longer required, use create(QueryProjection) instead
static <T> SubQuery<T>	create(QueryProjection<T> selection) Build a sub query with given projection as selection.
QueryFilter	exists() Build a EXISTS filter predicate using this sub query
QueryProjection<T>	getSelection() Gets the projection to use as the subquery result
QueryFilter	notExists() Build a NOT EXISTS filter predicate using this sub query
SubQuery<T>	select(QueryProjection<T> projection) Specify the projection to use as the subquery result.

Methods inherited from interface com.holonplatform.core.query.QueryBuilder

distinct, getQueryConfiguration, limit, offset, parameter, parameter, restrict

Methods inherited from interface com.holonplatform.core.query.QueryFilter.QueryFilterSupport

filter, filter, filter

Methods inherited from interface com.holonplatform.core.query.QuerySort.QuerySortSupport

sort, sort, sort

Methods inherited from interface com.holonplatform.core.datastore.DataTarget.DataTargetSupport

target, target

Methods inherited from interface com.holonplatform.core.query.QueryAggregation.QueryAggregationSupport

aggregate, aggregate, aggregate

Methods inherited from interface com.holonplatform.core.ExpressionResolver.ExpressionResolverBuilder

withExpressionResolver

Methods inherited from interface com.holonplatform.core.query.QueryExpression

between, count, eq, eq, goe, goe, gt, gt, in, in, in, isNotNull, isNull, loe, loe, lt, lt, max, min, neq, neq, nin, nin, nin

Methods inherited from interface com.holonplatform.core.TypedExpression

getTemporalType, getType, isCollectionExpression, isConverterExpression

Methods inherited from interface com.holonplatform.core.Expression

validate

Method Detail

select

SubQuery<T> select(QueryProjection<T> projection)

Specify the projection to use as the subquery result.

Parameters:

projection - Projection (not null)

Returns:

this

getSelection

QueryProjection<T> getSelection()

Gets the projection to use as the subquery result

Returns:

Selection projection

exists

QueryFilter exists()

Build a EXISTS filter predicate using this sub query

Returns:

Exist filter

notExists

QueryFilter notExists()

Build a NOT EXISTS filter predicate using this sub query

Returns:

Not exists filter

create

static <T> SubQuery<T> create(Class<? extends T> selectionType)

Build a sub query with given selection type.

Type Parameters:

T - Subquery selection type

Parameters:

selectionType - Sub query selection type (not null)

Returns:

Sub query instance

create

static <T> SubQuery<T> create(QueryProjection<T> selection)

Build a sub query with given projection as selection.

Type Parameters:

T - Subquery selection type

Parameters:

selection - Query selection (not null)

Returns:

Sub query instance

create

static SubQuery<Integer> create()

Build a sub query with a default select 1 projection as selection.

Returns:

Sub query instance

create

@Deprecated
static <T> SubQuery<T> create(Datastore datastore,
                                           Class<? extends T> selectionType)

Deprecated. Datastore parameter is no longer required, use create(Class) instead

Build a sub query with given selection type.

Type Parameters:

T - Subquery selection type

Parameters:

datastore - Datastore (not null)

selectionType - Sub query selection type (not null)

Returns:

Sub query instance

create

@Deprecated
static <T> SubQuery<T> create(Datastore datastore,
                                           QueryProjection<T> selection)

Deprecated. Datastore parameter is no longer required, use create(QueryProjection) instead

Build a sub query with given property as selection.

Type Parameters:

T - Subquery selection type

Parameters:

datastore - Datastore (not null)

selection - Query selection (not null)

Returns:

Sub query instance

create

@Deprecated
static SubQuery<Integer> create(Datastore datastore)

Deprecated. Datastore parameter is no longer required, use create() instead

Build a sub query with default select 1 projection as selection.

Parameters:

datastore - Datastore (not null)

Returns:

Sub query instance