Uses of Interface
org.apache.openjpa.jdbc.sql.Select

Packages that use Select

org.apache.openjpa.jdbc.kernel	OpenJPA-JDBC Runtime Kernel
org.apache.openjpa.jdbc.kernel.exps	OpenJPA-JDBC Expression Tree
org.apache.openjpa.jdbc.meta	OpenJPA-JDBC ORM Metadata
org.apache.openjpa.jdbc.meta.strats	OpenJPA-JDBC ORM Strategies
org.apache.openjpa.jdbc.sql	OpenJPA-JDBC SQL Abstraction

Uses of Select in org.apache.openjpa.jdbc.kernel

Methods in org.apache.openjpa.jdbc.kernel with parameters of type Select

static BitSet	PagingResultObjectProvider.getPagedFields(Select sel, ClassMapping mapping, JDBCStore store, JDBCFetchConfiguration fetch, int eagerMode, long size) Return a bit set representing batch select fields that will be paged, or null if no fields need paging, which indicates that this provider should not be used.
boolean	JDBCStoreManager.select(Select sel, ClassMapping mapping, int subs, OpenJPAStateManager sm, BitSet fields, JDBCFetchConfiguration fetch, int eager, boolean ident, boolean outer) For implementation use only.
boolean	PessimisticLockManager.selectForUpdate(Select sel, int lockLevel)
boolean	JDBCLockManager.selectForUpdate(Select sel, int lockLevel) Return whether to issue the given select FOR UPDATE, depending on the capabilities of the dictionary and the fetch configuration.

Uses of Select in org.apache.openjpa.jdbc.kernel.exps

Methods in org.apache.openjpa.jdbc.kernel.exps that return Select

Select

SelectConstructor.evaluate(ExpContext ctx, Select parent, String alias, QueryExpressions exps, QueryExpressionsState state) Evaluate the expression, returning a new select and filling in any associated expression state.

Methods in org.apache.openjpa.jdbc.kernel.exps with parameters of type Select

void	Val.appendIsEmpty(Select sel, ExpContext ctx, ExpState state, SQLBuffer sql) Append the SQL testing whether this value is empty to the given buffer.
void	Args.appendIsEmpty(Select sel, ExpContext ctx, ExpState state, SQLBuffer sql)
void	Val.appendIsNotEmpty(Select sel, ExpContext ctx, ExpState state, SQLBuffer sql) Append the SQL testing whether this value is not empty to the given buffer.
void	Args.appendIsNotEmpty(Select sel, ExpContext ctx, ExpState state, SQLBuffer sql)
void	Val.appendIsNotNull(Select sel, ExpContext ctx, ExpState state, SQLBuffer sql) Append the SQL testing whether this value is not null to the given buffer.
void	Args.appendIsNotNull(Select sel, ExpContext ctx, ExpState state, SQLBuffer sql)
void	Val.appendIsNull(Select sel, ExpContext ctx, ExpState state, SQLBuffer sql) Append the SQL testing whether this value is null to the given buffer.
void	Args.appendIsNull(Select sel, ExpContext ctx, ExpState state, SQLBuffer sql)
void	Val.appendSize(Select sel, ExpContext ctx, ExpState state, SQLBuffer sql) Append the SQL checking the size of this value.
void	Args.appendSize(Select sel, ExpContext ctx, ExpState state, SQLBuffer sql)
void	Val.appendTo(Select sel, ExpContext ctx, ExpState state, SQLBuffer sql, int index) Append the indexth SQL element to the given buffer.
void	Param.appendTo(Select sel, ExpContext ctx, ExpState state, SQLBuffer sql, int index)
void	Lit.appendTo(Select sel, ExpContext ctx, ExpState state, SQLBuffer sql, int index)
void	Args.appendTo(Select sel, ExpContext ctx, ExpState state, SQLBuffer sql, int index)
void	Val.calculateValue(Select sel, ExpContext ctx, ExpState state, Val other, ExpState otherState) Calculate and cache the SQL for this value.
void	Param.calculateValue(Select sel, ExpContext ctx, ExpState state, Val other, ExpState otherState)
void	Lit.calculateValue(Select sel, ExpContext ctx, ExpState state, Val other, ExpState otherState)
void	Args.calculateValue(Select sel, ExpContext ctx, ExpState state, Val other, ExpState otherState)
Select	SelectConstructor.evaluate(ExpContext ctx, Select parent, String alias, QueryExpressions exps, QueryExpressionsState state) Evaluate the expression, returning a new select and filling in any associated expression state.
Object	Param.getSQLValue(Select sel, ExpContext ctx, ExpState state)
void	Val.groupBy(Select sel, ExpContext ctx, ExpState state) Group by this value.
void	Args.groupBy(Select sel, ExpContext ctx, ExpState state)
ExpState	Val.initialize(Select sel, ExpContext ctx, int flags) Initialize the value.
ExpState	Param.initialize(Select sel, ExpContext ctx, int flags)
ExpState	Lit.initialize(Select sel, ExpContext ctx, int flags)
ExpState	Args.initialize(Select sel, ExpContext ctx, int flags)
int	Val.length(Select sel, ExpContext ctx, ExpState state) Return the number of SQL elements in this value.
int	Args.length(Select sel, ExpContext ctx, ExpState state)
FilterValue[]	Args.newFilterValues(Select sel, ExpContext ctx, ExpState state) Return a filter value for each argument.
void	Val.orderBy(Select sel, ExpContext ctx, ExpState state, boolean asc) Order by this value.
void	Args.orderBy(Select sel, ExpContext ctx, ExpState state, boolean asc)
void	SelectConstructor.select(Select sel, ExpContext ctx, ClassMapping mapping, boolean subclasses, QueryExpressions exps, QueryExpressionsState state, int eager) Select the data for this query.
void	Val.select(Select sel, ExpContext ctx, ExpState state, boolean pks) Select the data for this value.
void	Args.select(Select sel, ExpContext ctx, ExpState state, boolean pks)
void	Val.selectColumns(Select sel, ExpContext ctx, ExpState state, boolean pks) Select just the columns for this value.
void	Args.selectColumns(Select sel, ExpContext ctx, ExpState state, boolean pks)
Object	Val.toDataStoreValue(Select sel, ExpContext ctx, ExpState state, Object val) Return the datastore value of the given object in the context of this value.

Uses of Select in org.apache.openjpa.jdbc.meta

Methods in org.apache.openjpa.jdbc.meta with parameters of type Select

boolean	Discriminator.addClassConditions(Select sel, boolean subs, Joins joins) Add WHERE conditions to the given select limiting the returned results to our mapping type, possibly including subclasses.
void	FieldStrategy.appendIsEmpty(SQLBuffer sql, Select sel, Joins joins) Append a where clause to the given statement checking if this value is empty.
void	FieldMapping.appendIsEmpty(SQLBuffer sql, Select sel, Joins joins)
void	FieldStrategy.appendIsNotEmpty(SQLBuffer sql, Select sel, Joins joins) Append a where clause to the given statement checking if this value is not empty.
void	FieldMapping.appendIsNotEmpty(SQLBuffer sql, Select sel, Joins joins)
void	FieldStrategy.appendIsNotNull(SQLBuffer sql, Select sel, Joins joins) Append a where clause to the given statement checking if this value is not null.
void	FieldMapping.appendIsNotNull(SQLBuffer sql, Select sel, Joins joins)
void	FieldStrategy.appendIsNull(SQLBuffer sql, Select sel, Joins joins) Append a where clause to the given statement checking if this value is null.
void	FieldMapping.appendIsNull(SQLBuffer sql, Select sel, Joins joins)
void	FieldStrategy.appendSize(SQLBuffer sql, Select sel, Joins joins) Append a where clause to the given statement checking the size of the value.
void	FieldMapping.appendSize(SQLBuffer sql, Select sel, Joins joins)
SQLBuffer	DiscriminatorStrategy.getClassConditions(Select sel, Joins joins, ClassMapping base, boolean subs) Return SQL to limit the classes selected as much as possible to the given base class, and optionally its subclasses.
SQLBuffer	Discriminator.getClassConditions(Select sel, Joins joins, ClassMapping base, boolean subs)
Joins	FieldMapping.join(Select sel) Return any joins needed to get from the primary table to this table.
void	FieldMapping.orderLocal(Select sel, ClassMapping elem, Joins joins) Add ordering to the given select for all non-relation order values, including the synthetic order column, if any.
void	FieldMapping.orderRelation(Select sel, ClassMapping elem, Joins joins) Add ordering to the given select for all relation-based values.
boolean	VersionStrategy.select(Select sel, ClassMapping mapping) Select the data for this indicator.
boolean	Version.select(Select sel, ClassMapping mapping)
boolean	DiscriminatorStrategy.select(Select sel, ClassMapping mapping) Select the data for this Discriminator.
boolean	Discriminator.select(Select sel, ClassMapping mapping)
int	FieldStrategy.select(Select sel, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch, int eagerMode) Select the virtual row columns of this mapping.
int	FieldMapping.select(Select sel, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch, int eagerMode)
void	FieldStrategy.selectEagerJoin(Select sel, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch, int eagerMode) Fill in joined select to related objects.
void	FieldMapping.selectEagerJoin(Select sel, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch, int eagerMode)
boolean	ClassStrategy.supportsEagerSelect(Select sel, OpenJPAStateManager sm, JDBCStore store, ClassMapping base, JDBCFetchConfiguration fetch) Return true if this strategy can perform the given select from the given base mapping.
boolean	ClassMapping.supportsEagerSelect(Select sel, OpenJPAStateManager sm, JDBCStore store, ClassMapping base, JDBCFetchConfiguration fetch)
int	FieldStrategy.supportsSelect(Select sel, int type, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch) Return whether this mapping can perform the given select type.
int	FieldMapping.supportsSelect(Select sel, int type, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch)
void	FieldMapping.wherePrimaryKey(Select sel, OpenJPAStateManager sm, JDBCStore store) Add a wherePrimaryKey or whereForeignKey condition to the given select, depending on whether we have a join foreign key.

Uses of Select in org.apache.openjpa.jdbc.meta.strats

Methods in org.apache.openjpa.jdbc.meta.strats with parameters of type Select

void	ContainerFieldStrategy.appendIsEmpty(SQLBuffer sql, Select sel, Joins joins)
void	AbstractFieldStrategy.appendIsEmpty(SQLBuffer sql, Select sel, Joins joins)
void	ContainerFieldStrategy.appendIsNotEmpty(SQLBuffer sql, Select sel, Joins joins)
void	AbstractFieldStrategy.appendIsNotEmpty(SQLBuffer sql, Select sel, Joins joins)
void	StringFieldStrategy.appendIsNotNull(SQLBuffer sql, Select sel, Joins joins)
void	RelationFieldStrategy.appendIsNotNull(SQLBuffer sql, Select sel, Joins joins)
void	PrimitiveFieldStrategy.appendIsNotNull(SQLBuffer sql, Select sel, Joins joins)
void	HandlerFieldStrategy.appendIsNotNull(SQLBuffer sql, Select sel, Joins joins)
void	EmbedFieldStrategy.appendIsNotNull(SQLBuffer sql, Select sel, Joins joins)
void	ContainerFieldStrategy.appendIsNotNull(SQLBuffer sql, Select sel, Joins joins)
void	AbstractFieldStrategy.appendIsNotNull(SQLBuffer sql, Select sel, Joins joins)
void	StringFieldStrategy.appendIsNull(SQLBuffer sql, Select sel, Joins joins)
void	RelationFieldStrategy.appendIsNull(SQLBuffer sql, Select sel, Joins joins)
void	PrimitiveFieldStrategy.appendIsNull(SQLBuffer sql, Select sel, Joins joins)
void	HandlerFieldStrategy.appendIsNull(SQLBuffer sql, Select sel, Joins joins)
void	EmbedFieldStrategy.appendIsNull(SQLBuffer sql, Select sel, Joins joins)
void	ContainerFieldStrategy.appendIsNull(SQLBuffer sql, Select sel, Joins joins)
void	AbstractFieldStrategy.appendIsNull(SQLBuffer sql, Select sel, Joins joins)
protected static void	ContainerFieldStrategy.appendJoinCount(SQLBuffer sql, Select sel, Joins joins, DBDictionary dict, FieldMapping field, ForeignKey fk)
void	ContainerFieldStrategy.appendSize(SQLBuffer sql, Select sel, Joins joins)
void	AbstractFieldStrategy.appendSize(SQLBuffer sql, Select sel, Joins joins)
static void	ContainerFieldStrategy.appendUnaliasedJoin(SQLBuffer sql, Select sel, Joins joins, DBDictionary dict, FieldMapping field, ForeignKey fk)
SQLBuffer	SuperclassDiscriminatorStrategy.getClassConditions(Select sel, Joins joins, ClassMapping base, boolean subclasses)
SQLBuffer	SubclassJoinDiscriminatorStrategy.getClassConditions(Select sel, Joins joins, ClassMapping base, boolean subclasses)
SQLBuffer	InValueDiscriminatorStrategy.getClassConditions(Select sel, Joins joins, ClassMapping base, boolean subclasses)
SQLBuffer	AbstractDiscriminatorStrategy.getClassConditions(Select sel, Joins joins, ClassMapping base, boolean subs)
boolean	SubclassJoinDiscriminatorStrategy.select(Select sel, ClassMapping mapping)
boolean	InValueDiscriminatorStrategy.select(Select sel, ClassMapping mapping)
boolean	ColumnVersionStrategy.select(Select sel, ClassMapping mapping)
boolean	AbstractVersionStrategy.select(Select sel, ClassMapping mapping)
boolean	AbstractDiscriminatorStrategy.select(Select sel, ClassMapping mapping)
int	StringFieldStrategy.select(Select sel, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch, int eagerMode)
int	RelationFieldStrategy.select(Select sel, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch, int eagerMode)
int	PrimitiveFieldStrategy.select(Select sel, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch, int eagerMode)
int	HandlerFieldStrategy.select(Select sel, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch, int eagerMode)
int	EmbedFieldStrategy.select(Select sel, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch, int eagerMode)
int	AbstractFieldStrategy.select(Select sel, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch, int eagerMode)
protected Joins	StoreCollectionFieldStrategy.selectAll(Select sel, ClassMapping elem, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch, int eagerMode) Select data for loading, starting in field table.
void	StoreCollectionFieldStrategy.selectEagerJoin(Select sel, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch, int eagerMode)
void	RelationFieldStrategy.selectEagerJoin(Select sel, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch, int eagerMode)
void	AbstractFieldStrategy.selectEagerJoin(Select sel, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch, int eagerMode)
protected abstract void	StoreCollectionFieldStrategy.selectElement(Select sel, ClassMapping elem, JDBCStore store, JDBCFetchConfiguration fetch, int eagerMode, Joins joins) Implement this method to select the elements of this field for the given element mapping from ContainerFieldStrategy.getIndependentElementMappings(boolean) (or null).
protected void	RelationToManyTableFieldStrategy.selectElement(Select sel, ClassMapping elem, JDBCStore store, JDBCFetchConfiguration fetch, int eagerMode, Joins joins)
protected void	RelationToManyInverseKeyFieldStrategy.selectElement(Select sel, ClassMapping elem, JDBCStore store, JDBCFetchConfiguration fetch, int eagerMode, Joins joins)
void	RelationCollectionTableFieldStrategy.selectElement(Select sel, ClassMapping elem, JDBCStore store, JDBCFetchConfiguration fetch, int eagerMode, Joins joins)
void	RelationCollectionInverseKeyFieldStrategy.selectElement(Select sel, ClassMapping elem, JDBCStore store, JDBCFetchConfiguration fetch, int eagerMode, Joins joins)
void	LRSCollectionFieldStrategy.selectElement(Select sel, ClassMapping elem, JDBCStore store, JDBCFetchConfiguration fetch, int eagerMode, Joins joins) Implement this method to select the elements of this field for the given element mapping from LRSCollectionFieldStrategy.getIndependentElementMappings(boolean) (or null).
void	RelationMapTableFieldStrategy.selectKey(Select sel, ClassMapping key, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch, Joins joins)
void	RelationMapInverseKeyFieldStrategy.selectKey(Select sel, ClassMapping key, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch, Joins joins)
void	LRSMapFieldStrategy.selectKey(Select sel, ClassMapping key, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch, Joins joins) Implement this method to select the keys of this field.
void	RelationMapTableFieldStrategy.selectValue(Select sel, ClassMapping val, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch, Joins joins)
void	RelationMapInverseKeyFieldStrategy.selectValue(Select sel, ClassMapping val, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch, Joins joins)
void	LRSMapFieldStrategy.selectValue(Select sel, ClassMapping val, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch, Joins joins) Implement this method to select the values of this field.
boolean	VerticalClassStrategy.supportsEagerSelect(Select sel, OpenJPAStateManager sm, JDBCStore store, ClassMapping base, JDBCFetchConfiguration fetch)
boolean	FullClassStrategy.supportsEagerSelect(Select sel, OpenJPAStateManager sm, JDBCStore store, ClassMapping base, JDBCFetchConfiguration fetch)
boolean	AbstractClassStrategy.supportsEagerSelect(Select sel, OpenJPAStateManager sm, JDBCStore store, ClassMapping base, JDBCFetchConfiguration fetch)
int	StringFieldStrategy.supportsSelect(Select sel, int type, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch)
int	StoreCollectionFieldStrategy.supportsSelect(Select sel, int type, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch)
int	RelationFieldStrategy.supportsSelect(Select sel, int type, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch)
int	PrimitiveFieldStrategy.supportsSelect(Select sel, int type, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch)
int	MapTableFieldStrategy.supportsSelect(Select sel, int type, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch)
int	HandlerFieldStrategy.supportsSelect(Select sel, int type, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch)
int	EmbedFieldStrategy.supportsSelect(Select sel, int type, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch)
int	AbstractFieldStrategy.supportsSelect(Select sel, int type, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch)

Uses of Select in org.apache.openjpa.jdbc.sql

Classes in org.apache.openjpa.jdbc.sql that implement Select

protected class	LogicalUnion.UnionSelect A select that is part of a logical union.
class	SelectImpl Standard Select implementation.

Methods in org.apache.openjpa.jdbc.sql that return Select

Select	SelectImpl.getFromSelect()
Select	Select.getFromSelect() Another select instance that creates a temporary table from which this select pulls data.
Select	LogicalUnion.UnionSelect.getFromSelect()
Select	SelectImpl.getParent()
Select	Select.getParent() Return the parent of this select, if it is a subselect.
Select	LogicalUnion.UnionSelect.getParent()
Select[]	Union.getSelects() Return the selects that make up this union.
Select[]	LogicalUnion.getSelects()
Select	SQLFactoryImpl.newSelect()
Select	SQLFactory.newSelect() Select factory.

Methods in org.apache.openjpa.jdbc.sql with parameters of type Select

SQLBuffer	SQLBuffer.append(Select sel, JDBCFetchConfiguration fetch) Append a subselect.
SQLBuffer	SQLBuffer.appendCount(Select sel, JDBCFetchConfiguration fetch) Append a subselect count.
protected void	DBDictionary.appendUpdates(Select sel, JDBCStore store, SQLBuffer sql, Object[] params, Map updateParams, boolean allowAlias)
protected SQLBuffer	DBDictionary.getFrom(Select sel, boolean forUpdate) Return the portion of the select statement between the FROM keyword and the WHERE keyword.
protected SQLBuffer	DBDictionary.getFromSelect(Select sel, boolean forUpdate) Return the FROM clause for a select that selects from a tmp table created by an inner select.
protected SQLBuffer	OracleDictionary.getSelects(Select sel, boolean distinctIdentifiers, boolean forUpdate)
protected SQLBuffer	DBDictionary.getSelects(Select sel, boolean distinctIdentifiers, boolean forUpdate) Return the portion of the select statement between the SELECT keyword and the FROM keyword.
protected SQLBuffer	DBDictionary.getWhere(Select sel, boolean forUpdate) Return the WHERE portion of the select statement, or null if no where conditions.
Union	SQLFactoryImpl.newUnion(Select[] selects)
Union	SQLFactory.newUnion(Select[] selects) Union factory.
boolean	SQLBuffer.replace(Select old, Select sel) Replace a subselect.
void	Union.Selector.select(Select sel, int i) Populate the ith select in the union.
void	LogicalUnion.Selector.select(Select sel, int i) Populate the ith select in the union.
void	SelectImpl.setFromSelect(Select sel)
void	Select.setFromSelect(Select sel) Another select instance that creates a temporary table from which this select pulls data.
void	LogicalUnion.UnionSelect.setFromSelect(Select sel)
void	SelectImpl.setParent(Select parent, String path)
void	Select.setParent(Select parent, String path) Turn this select into a subselect of the given instance.
void	LogicalUnion.UnionSelect.setParent(Select parent, String path)
boolean	OracleDictionary.supportsLocking(Select sel)
boolean	DBDictionary.supportsLocking(Select sel) Returns true if a "FOR UPDATE" clause can be used for the specified Select object.
boolean	InformixDictionary.supportsRandomAccessResultSet(Select sel, boolean forUpdate)
boolean	DBDictionary.supportsRandomAccessResultSet(Select sel, boolean forUpdate) Return false if the given select requires a forward-only result set.
boolean	DB2Dictionary.supportsRandomAccessResultSet(Select sel, boolean forUpdate)
protected SQLBuffer	DBDictionary.toBulkOperation(ClassMapping mapping, Select sel, JDBCStore store, Object[] params, Map updateParams) Returns the SQL for a bulk operation, either a DELETE or an UPDATE.
SQLBuffer	DBDictionary.toDelete(ClassMapping mapping, Select sel, Object[] params) Create a DELETE statement for the specified Select.
SQLBuffer	DBDictionary.toSelect(Select sel, boolean forUpdate, JDBCFetchConfiguration fetch) Create a SELECT statement in the proper join syntax for the given instance.
SQLBuffer	DB2Dictionary.toSelect(Select sel, boolean forUpdate, JDBCFetchConfiguration fetch)
SQLBuffer	DBDictionary.toSelectCount(Select sel) Create a SELECT COUNT statement in the proper join syntax for the given instance.
SQLBuffer	DBDictionary.toUpdate(ClassMapping mapping, Select sel, JDBCStore store, Object[] params, Map updates)

Constructors in org.apache.openjpa.jdbc.sql with parameters of type Select

LogicalUnion(JDBCConfiguration conf, int sels, Select[] seeds)
Delegate constructor.

LogicalUnion(JDBCConfiguration conf, Select[] seeds)
Constructor used to seed the internal selects.