org.apache.openjpa.jdbc.sql
Interface Select

All Superinterfaces:

SelectExecutor

All Known Implementing Classes:

LogicalUnion.UnionSelect, SelectImpl

public interface Select
extends SelectExecutor

Abstraction of a SQL SELECT statement.

Author:

Abe White

Field Summary

static int	EAGER_INNER Constant indicating to batch the select using an inner join.
static int	EAGER_OUTER Constant indicating to batch the select using an outer join.
static int	EAGER_PARALLEL Constant indicating to use a separate select executed in parallel.
static String	FROM_SELECT_ALIAS The alias to use for the from select, if any.
static int	SUBS_ANY_JOINABLE Constant indicating to select subclasses but without adding any class conditions to the select.
static int	SUBS_EXACT Constant indicating to select this class but without adding any class conditions to the select.
static int	SUBS_JOINABLE Constant indicating to add conditions to the selcet to select this class and joinable subclasses only.
static int	SUBS_NONE Constant indicating to add conditions to the select to select this class only.
static int	TYPE_JOINLESS Constant indicating a select can be made without joins.
static int	TYPE_TWO_PART Constant indicating a two-part select and load.

Method Summary

void	addJoinClassConditions() Apply class conditions from relation joins.
Joins	and(Joins joins1, Joins joins2) AND the given joins together.
void	append(SQLBuffer buf, Joins joins) Append the given joins to the given buffer.
void	clearOrdering() Clear odering conditions.
void	clearSelects() Clear the existing column selects.
SelectExecutor	eagerClone(FieldMapping key, int eagerType, boolean toMany, int sels) Return a select that will be eagerly executed with this one, or null if the select cannot be created for the given key and join type.
SelectExecutor	fullClone(int sels) Return a SELECT that is a complete clone of this one.
String	getColumnAlias(Column col) Return the alias for the given column.
String	getColumnAlias(Column col, Joins joins) Return the alias for the given column.
String	getColumnAlias(String col, Table table) Return the alias for the given column.
String	getColumnAlias(String col, Table table, Joins joins) Return the alias for the given column.
SelectExecutor	getEager(FieldMapping key) Return the eager select for the given key.
long	getEndIndex() The result end index.
Select	getFromSelect() Another select instance that creates a temporary table from which this select pulls data.
SQLBuffer	getGrouping() Return the grouping SQL for this select.
SQLBuffer	getHaving() Return the HAVING clause, or null if none.
List	getIdentifierAliases() Get the aliases for identifier columns that can be used in COUNT selects to find the number of matches.
Iterator	getJoinIterator() Return the top-level Join elements for this select.
Joins	getJoins() Return the top-level joins for this select.
SQLBuffer	getOrdering() Return the ordering SQL for this select.
Select	getParent() Return the parent of this select, if it is a subselect.
List	getSelectAliases() Return the aliases of all selected columns and all selected buffers, in the order they were selected.
long	getStartIndex() The result start index.
String	getSubselectPath() Return the subselect path for this select, if it is a subselect.
List	getSubselects() Return this select's subselects, or empty collection if none.
Collection	getTableAliases() Return the set of all used table aliases.
SQLBuffer	getWhere() Return the WHERE clause, minus any necessary end joins.
void	groupBy(ClassMapping mapping, int subclasses, JDBCStore store, JDBCFetchConfiguration fetch) Group by the columns of the given mapping, possibly including subclasses.
void	groupBy(ClassMapping mapping, int subclasses, JDBCStore store, JDBCFetchConfiguration fetch, Joins joins) Group by the columns of the given mapping, possibly including subclasses.
void	groupBy(Column col) Group by the given column.
void	groupBy(Column[] cols) Group by the given columns.
void	groupBy(Column[] cols, Joins joins) Group by the given columns.
void	groupBy(Column col, Joins joins) Group by the given column.
void	groupBy(SQLBuffer sql) Add a GROUP BY clause.
void	groupBy(SQLBuffer sql, Joins joins) Add a GROUP BY clause.
void	groupBy(String sql) Add a GROUP BY clause.
void	groupBy(String sql, Joins joins) Add a GROUP BY clause.
boolean	hasEagerJoin(boolean toMany) Whether this select has an eager join of the specified type.
boolean	hasJoin(boolean toMany) Whether this select has a join of the specified type.
void	having(SQLBuffer sql) Add the given having conditions.
void	having(SQLBuffer sql, Joins joins) Add the given having conditions.
void	having(String sql) Add the given having conditions.
void	having(String sql, Joins joins) Add the given having conditions.
int	indexOf() The index of this select within the UNION, or 0.
boolean	isAggregate() Return true if this is an aggregate select.
boolean	isLob() Return true if this select includes a LOB.
boolean	isSelected(Table table) Return whether the given table is being used in this select.
Joins	newJoins() Return a new instance to use for joining.
Joins	newOuterJoins() Return a new instance to use for outer joining.
Joins	or(Joins joins1, Joins joins2) OR the given joins together.
int	orderBy(Column[] cols, boolean asc, boolean sel) Order by the given columns.
int	orderBy(Column[] cols, boolean asc, Joins joins, boolean sel) Order by the given columns.
boolean	orderBy(Column col, boolean asc, boolean sel) Order by the given column.
boolean	orderBy(Column col, boolean asc, Joins joins, boolean sel) Order by the given column.
boolean	orderBy(SQLBuffer sql, boolean asc, boolean sel) Add an ORDER BY clause.
boolean	orderBy(SQLBuffer sql, boolean asc, Joins joins, boolean sel) Add an ORDER BY clause.
boolean	orderBy(String sql, boolean asc, boolean sel) Add an ORDER BY clause.
boolean	orderBy(String sql, boolean asc, Joins joins, boolean sel) Add an ORDER BY clause.
int	orderByPrimaryKey(ClassMapping mapping, boolean asc, boolean sel) Order on the primary key columns of the given mapping, joining to superclasses as necessary to get all columns needed to construct an object id.
int	orderByPrimaryKey(ClassMapping mapping, boolean asc, Joins joins, boolean sel) Select and order on the primary key columns of the given mapping, joining to superclasses as necessary to get all columns needed to construct an object id.
Joins	outer(Joins joins) Return a join set making the given joins outer joins.
void	select(ClassMapping mapping, int subclasses, JDBCStore store, JDBCFetchConfiguration fetch, int eager) Select the columns of the given mapping, possibly including subclasses.
void	select(ClassMapping mapping, int subclasses, JDBCStore store, JDBCFetchConfiguration fetch, int eager, Joins joins) Select the columns of the given mapping, possibly including subclasses.
boolean	select(Column col) Select the given column.
int	select(Column[] cols) Select the given columns.
int	select(Column[] cols, Joins joins) Select the given columns.
boolean	select(Column col, Joins joins) Select the given column.
boolean	select(SQLBuffer sql, Object id) Select the given SQL; the given id object is an identifier to use when retrieving the corresponding value from a Result.
boolean	select(SQLBuffer sql, Object id, Joins joins) Select the given SQL; the given id object is an identifier to use when retrieving the corresponding value from a Result.
boolean	select(String sql, Object id) Select the given SQL; the given id object is an identifier to use when retrieving the corresponding value from a Result.
boolean	select(String sql, Object id, Joins joins) Select the given SQL; the given id object is an identifier to use when retrieving the corresponding value from a Result.
void	selectIdentifier(ClassMapping mapping, int subclasses, JDBCStore store, JDBCFetchConfiguration fetch, int eager) Select the columns of the given mapping, possibly including subclasses.
void	selectIdentifier(ClassMapping mapping, int subclasses, JDBCStore store, JDBCFetchConfiguration fetch, int eager, Joins joins) Select the columns of the given mapping, possibly including subclasses.
boolean	selectIdentifier(Column col) Select the given column as one that can be used to get a count of distinct matches.
int	selectIdentifier(Column[] cols) Select the given columns as ones that can be used to get a count of distinct matches.
int	selectIdentifier(Column[] cols, Joins joins) Select the given columns as ones that can be used to get a count of distinct matches.
boolean	selectIdentifier(Column col, Joins joins) Select the given column as one that can be used to get a count of distinct matches.
void	selectPlaceholder(String sql) Select the given SQL as a placeholder for a UNION element.
int	selectPrimaryKey(ClassMapping mapping) Select the primary key columns of the given mapping, joining to superclasses as necessary to get all columns needed to construct an object id.
int	selectPrimaryKey(ClassMapping mapping, Joins joins) Select the primary key columns of the given mapping, joining to superclasses as necessary to get all columns needed to construct an object id.
void	setAggregate(boolean agg) Set to true for aggregate selects.
void	setFromSelect(Select sel) Another select instance that creates a temporary table from which this select pulls data.
void	setLob(boolean lob) Set to true for selects that include LOB columns.
void	setParent(Select parent, String path) Turn this select into a subselect of the given instance.
void	setRange(long start, long end) Set the result range for this select.
String	toString() Implement toString to generate SQL string for profiling/debuggging.
void	where(Joins joins) Add the given where conditions.
void	where(SQLBuffer sql) Add the given where conditions.
void	where(SQLBuffer sql, Joins joins) Add the given where conditions.
void	where(String sql) Add the given where conditions.
void	where(String sql, Joins joins) Add the given where conditions.
SelectExecutor	whereClone(int sels) Return a SELECT with the same joins and where conditions as this one.
void	whereForeignKey(ForeignKey fk, Object oid, ClassMapping mapping, JDBCStore store) Add where conditions setting the given foreign key to the given oid values.
void	wherePrimaryKey(Object oid, ClassMapping mapping, JDBCStore store) Add where conditions setting the mapping's primary key to the given oid values.

Methods inherited from interface org.apache.openjpa.jdbc.sql.SelectExecutor

execute, execute, getAutoDistinct, getConfiguration, getCount, getExpectedResultCount, getJoinSyntax, isDistinct, isLRS, setAutoDistinct, setDistinct, setExpectedResultCount, setJoinSyntax, setLRS, supportsLocking, supportsRandomAccess, toSelect, toSelectCount

Field Detail

EAGER_INNER

static final int EAGER_INNER

Constant indicating to batch the select using an inner join.

See Also:

Constant Field Values

EAGER_OUTER

static final int EAGER_OUTER

Constant indicating to batch the select using an outer join.

See Also:

Constant Field Values

EAGER_PARALLEL

static final int EAGER_PARALLEL

Constant indicating to use a separate select executed in parallel.

See Also:

Constant Field Values

TYPE_JOINLESS

static final int TYPE_JOINLESS

Constant indicating a select can be made without joins.

See Also:

Constant Field Values

TYPE_TWO_PART

static final int TYPE_TWO_PART

Constant indicating a two-part select and load.

See Also:

Constant Field Values

SUBS_JOINABLE

static final int SUBS_JOINABLE

Constant indicating to add conditions to the selcet to select this class and joinable subclasses only.

See Also:

Constant Field Values

SUBS_NONE

static final int SUBS_NONE

Constant indicating to add conditions to the select to select this class only.

See Also:

Constant Field Values

SUBS_ANY_JOINABLE

static final int SUBS_ANY_JOINABLE

Constant indicating to select subclasses but without adding any class conditions to the select.

See Also:

Constant Field Values

SUBS_EXACT

static final int SUBS_EXACT

Constant indicating to select this class but without adding any class conditions to the select.

See Also:

Constant Field Values

FROM_SELECT_ALIAS

static final String FROM_SELECT_ALIAS

The alias to use for the from select, if any.

See Also:

Constant Field Values

Method Detail

indexOf

int indexOf()

The index of this select within the UNION, or 0.

getSubselects

List getSubselects()

Return this select's subselects, or empty collection if none.

getParent

Select getParent()

Return the parent of this select, if it is a subselect.

getSubselectPath

String getSubselectPath()

Return the subselect path for this select, if it is a subselect.

setParent

void setParent(Select parent,
               String path)

Turn this select into a subselect of the given instance.

getFromSelect

Select getFromSelect()

Another select instance that creates a temporary table from which this select pulls data.

setFromSelect

void setFromSelect(Select sel)

Another select instance that creates a temporary table from which this select pulls data.

hasEagerJoin

boolean hasEagerJoin(boolean toMany)

Whether this select has an eager join of the specified type.

hasJoin

boolean hasJoin(boolean toMany)

Whether this select has a join of the specified type.

isSelected

boolean isSelected(Table table)

Return whether the given table is being used in this select.

getTableAliases

Collection getTableAliases()

Return the set of all used table aliases.

getSelectAliases

List getSelectAliases()

Return the aliases of all selected columns and all selected buffers, in the order they were selected. Each alias may be either a string or a SQLBuffer.

getIdentifierAliases

List getIdentifierAliases()

Get the aliases for identifier columns that can be used in COUNT selects to find the number of matches. Each alias will be a string. If no identifier columns have been nominated, then all column alises are returned.

getOrdering

SQLBuffer getOrdering()

Return the ordering SQL for this select.

getGrouping

SQLBuffer getGrouping()

Return the grouping SQL for this select.

getWhere

SQLBuffer getWhere()

Return the WHERE clause, minus any necessary end joins.

getHaving

SQLBuffer getHaving()

Return the HAVING clause, or null if none.

addJoinClassConditions

void addJoinClassConditions()

Apply class conditions from relation joins. This may affect the return values of getJoins(), getJoinIterator(), and getWhere().

getJoins

Joins getJoins()

Return the top-level joins for this select.

getJoinIterator

Iterator getJoinIterator()

Return the top-level Join elements for this select.

getStartIndex

long getStartIndex()

The result start index.

getEndIndex

long getEndIndex()

The result end index.

setRange

void setRange(long start,
              long end)

Set the result range for this select.

getColumnAlias

String getColumnAlias(Column col)

Return the alias for the given column.

getColumnAlias

String getColumnAlias(Column col,
                      Joins joins)

Return the alias for the given column.

getColumnAlias

String getColumnAlias(String col,
                      Table table)

Return the alias for the given column.

getColumnAlias

String getColumnAlias(String col,
                      Table table,
                      Joins joins)

Return the alias for the given column.

isAggregate

boolean isAggregate()

Return true if this is an aggregate select.

setAggregate

void setAggregate(boolean agg)

Set to true for aggregate selects.

isLob

boolean isLob()

Return true if this select includes a LOB.

setLob

void setLob(boolean lob)

Set to true for selects that include LOB columns.

clearSelects

void clearSelects()

Clear the existing column selects.

selectPlaceholder

void selectPlaceholder(String sql)

Select the given SQL as a placeholder for a UNION element.

select

boolean select(SQLBuffer sql,
               Object id)

Select the given SQL; the given id object is an identifier to use when retrieving the corresponding value from a Result.

Returns:

true if selected

select

boolean select(SQLBuffer sql,
               Object id,
               Joins joins)

Select the given SQL; the given id object is an identifier to use when retrieving the corresponding value from a Result.

Returns:

true if selected

select

boolean select(String sql,
               Object id)

Select the given SQL; the given id object is an identifier to use when retrieving the corresponding value from a Result.

Returns:

true if selected

select

boolean select(String sql,
               Object id,
               Joins joins)

Select the given SQL; the given id object is an identifier to use when retrieving the corresponding value from a Result.

Returns:

true if selected

select

boolean select(Column col)

Select the given column.

Returns:

true if selected

select

boolean select(Column col,
               Joins joins)

Select the given column.

Returns:

true if selected

select

int select(Column[] cols)

Select the given columns.

Returns:

bit set of indexes of columns that were selected

select

int select(Column[] cols,
           Joins joins)

Select the given columns.

Returns:

bit set of indexes of columns that were selected

select

void select(ClassMapping mapping,
            int subclasses,
            JDBCStore store,
            JDBCFetchConfiguration fetch,
            int eager)

Select the columns of the given mapping, possibly including subclasses. This method should be called after all where conditions are added in case the given mapping batches other selects.

select

void select(ClassMapping mapping,
            int subclasses,
            JDBCStore store,
            JDBCFetchConfiguration fetch,
            int eager,
            Joins joins)

Select the columns of the given mapping, possibly including subclasses. This method should be called after all where conditions are added in case the given mapping batches other selects.

selectIdentifier

boolean selectIdentifier(Column col)

Select the given column as one that can be used to get a count of distinct matches. It is not necessary to designate distinct identifiers when eagerly traversing the entire result of the select or when not using an LRSSize setting of count.

Returns:

true if selected

selectIdentifier

boolean selectIdentifier(Column col,
                         Joins joins)

Select the given column as one that can be used to get a count of distinct matches. It is not necessary to designate distinct identifiers when eagerly traversing the entire result of the select or when not using an LRSSize setting of count.

Returns:

true if selected

selectIdentifier

int selectIdentifier(Column[] cols)

Select the given columns as ones that can be used to get a count of distinct matches. It is not necessary to designate distinct identifiers when eagerly traversing the entire result of the select or when not using an LRSSize setting of count.

Returns:

bit set of indexes of columns that were selected

selectIdentifier

int selectIdentifier(Column[] cols,
                     Joins joins)

Select the given columns as ones that can be used to get a count of distinct matches. It is not necessary to designate distinct identifiers when eagerly traversing the entire result of the select or when not using an LRSSize setting of count.

Returns:

bit set of indexes of columns that were selected

selectIdentifier

void selectIdentifier(ClassMapping mapping,
                      int subclasses,
                      JDBCStore store,
                      JDBCFetchConfiguration fetch,
                      int eager)

Select the columns of the given mapping, possibly including subclasses. This method should be called after all where conditions are added in case the given mapping batches other selects. The primary key columns of the mapping can be used to get a count of distinct matches. It is not necessary to designate distinct identifiers when eagerly traversing the entire result of the select or when not using an LRSSize setting of count.

selectIdentifier

void selectIdentifier(ClassMapping mapping,
                      int subclasses,
                      JDBCStore store,
                      JDBCFetchConfiguration fetch,
                      int eager,
                      Joins joins)

Select the columns of the given mapping, possibly including subclasses. This method should be called after all where conditions are added in case the given mapping batches other selects. The primary key columns of the mapping can be used to get a count of distinct matches. It is not necessary to designate distinct identifiers when eagerly traversing the entire result of the select or when not using an LRSSize setting of count.

selectPrimaryKey

int selectPrimaryKey(ClassMapping mapping)

Select the primary key columns of the given mapping, joining to superclasses as necessary to get all columns needed to construct an object id.

Returns:

bit set of indexes of pk columns that were selected

selectPrimaryKey

int selectPrimaryKey(ClassMapping mapping,
                     Joins joins)

Select the primary key columns of the given mapping, joining to superclasses as necessary to get all columns needed to construct an object id.

Returns:

bit set of indexes of pk columns that were selected

clearOrdering

void clearOrdering()

Clear odering conditions.

orderByPrimaryKey

int orderByPrimaryKey(ClassMapping mapping,
                      boolean asc,
                      boolean sel)

Order on the primary key columns of the given mapping, joining to superclasses as necessary to get all columns needed to construct an object id. Optionally selects ordering data if not already selected.

orderByPrimaryKey

int orderByPrimaryKey(ClassMapping mapping,
                      boolean asc,
                      Joins joins,
                      boolean sel)

Select and order on the primary key columns of the given mapping, joining to superclasses as necessary to get all columns needed to construct an object id. Optionally selects ordering data if not already selected.

orderBy

boolean orderBy(Column col,
                boolean asc,
                boolean sel)

Order by the given column. Optionally selects ordering data if not already selected.

orderBy

boolean orderBy(Column col,
                boolean asc,
                Joins joins,
                boolean sel)

Order by the given column. Optionally selects ordering data if not already selected.

orderBy

int orderBy(Column[] cols,
            boolean asc,
            boolean sel)

Order by the given columns. Optionally selects ordering data if not already selected.

orderBy

int orderBy(Column[] cols,
            boolean asc,
            Joins joins,
            boolean sel)

Order by the given columns. Optionally selects ordering data if not already selected.

orderBy

boolean orderBy(SQLBuffer sql,
                boolean asc,
                boolean sel)

Add an ORDER BY clause. Optionally selects ordering data if not already selected.

orderBy

boolean orderBy(SQLBuffer sql,
                boolean asc,
                Joins joins,
                boolean sel)

Add an ORDER BY clause. Optionally selects ordering data if not already selected.

orderBy

boolean orderBy(String sql,
                boolean asc,
                boolean sel)

Add an ORDER BY clause. Optionally selects ordering data if not already selected.

orderBy

boolean orderBy(String sql,
                boolean asc,
                Joins joins,
                boolean sel)

Add an ORDER BY clause. Optionally selects ordering data if not already selected.

wherePrimaryKey

void wherePrimaryKey(Object oid,
                     ClassMapping mapping,
                     JDBCStore store)

Add where conditions setting the mapping's primary key to the given oid values. If the given mapping does not use oid values for its primary key, we will recursively join to its superclass until we find an ancestor that does.

whereForeignKey

void whereForeignKey(ForeignKey fk,
                     Object oid,
                     ClassMapping mapping,
                     JDBCStore store)

Add where conditions setting the given foreign key to the given oid values.

See Also:

wherePrimaryKey(java.lang.Object, org.apache.openjpa.jdbc.meta.ClassMapping, org.apache.openjpa.jdbc.kernel.JDBCStore)

where

void where(Joins joins)

Add the given where conditions.

where

void where(SQLBuffer sql)

Add the given where conditions.

where

void where(SQLBuffer sql,
           Joins joins)

Add the given where conditions.

where

void where(String sql)

Add the given where conditions.

where

void where(String sql,
           Joins joins)

Add the given where conditions.

having

void having(SQLBuffer sql)

Add the given having conditions.

having

void having(SQLBuffer sql,
            Joins joins)

Add the given having conditions.

having

void having(String sql)

Add the given having conditions.

having

void having(String sql,
            Joins joins)

Add the given having conditions.

groupBy

void groupBy(Column col)

Group by the given column.

groupBy

void groupBy(Column col,
             Joins joins)

Group by the given column.

groupBy

void groupBy(Column[] cols)

Group by the given columns.

groupBy

void groupBy(Column[] cols,
             Joins joins)

Group by the given columns.

groupBy

void groupBy(SQLBuffer sql)

Add a GROUP BY clause.

groupBy

void groupBy(SQLBuffer sql,
             Joins joins)

Add a GROUP BY clause.

groupBy

void groupBy(String sql)

Add a GROUP BY clause.

groupBy

void groupBy(String sql,
             Joins joins)

Add a GROUP BY clause.

groupBy

void groupBy(ClassMapping mapping,
             int subclasses,
             JDBCStore store,
             JDBCFetchConfiguration fetch)

Group by the columns of the given mapping, possibly including subclasses. Assumes EAGER_NONE.

groupBy

void groupBy(ClassMapping mapping,
             int subclasses,
             JDBCStore store,
             JDBCFetchConfiguration fetch,
             Joins joins)

Group by the columns of the given mapping, possibly including subclasses. Assumes EAGER_NONE.

whereClone

SelectExecutor whereClone(int sels)

Return a SELECT with the same joins and where conditions as this one.

Parameters:

sels - number of selects to UNION together; ignored if <= 1

fullClone

SelectExecutor fullClone(int sels)

Return a SELECT that is a complete clone of this one.

Parameters:

sels - number of selects to UNION together; ignored if <= 1

eagerClone

SelectExecutor eagerClone(FieldMapping key,
                          int eagerType,
                          boolean toMany,
                          int sels)

Return a select that will be eagerly executed with this one, or null if the select cannot be created for the given key and join type. If the join type is inner or outer, then this select instance will be returned. Otherwise, the returned select will have a clone of this select's where conditions and joins but will be independent.

Parameters:

key - the key for the eager select

eagerType - one of the EAGER_* constants

toMany - whether the eager join is to-many

sels - number of selects to UNION together; ignored if <= 1

getEager

SelectExecutor getEager(FieldMapping key)

Return the eager select for the given key.

newJoins

Joins newJoins()

Return a new instance to use for joining.

newOuterJoins

Joins newOuterJoins()

Return a new instance to use for outer joining.

append

void append(SQLBuffer buf,
            Joins joins)

Append the given joins to the given buffer.

and

Joins and(Joins joins1,
          Joins joins2)

AND the given joins together. The given joins will be hollowed in the process.

or

Joins or(Joins joins1,
         Joins joins2)

OR the given joins together. The common joins will be removed in the process.

outer

Joins outer(Joins joins)

Return a join set making the given joins outer joins.

toString

String toString()

Implement toString to generate SQL string for profiling/debuggging.

Overrides:

toString in class Object