org.datanucleus.store.rdbms.sql

Interface SelectStatementGenerator

All Known Implementing Classes:

AbstractSelectStatementGenerator, DiscriminatorStatementGenerator, UnionStatementGenerator

public interface SelectStatementGenerator

Generator of SQL SELECT Statements.

Field Summary

Fields

Modifier and Type	Field and Description
static String	OPTION_ALLOW_NULLS Option to allow null values as elements of an array or collection.
static String	OPTION_INCLUDE_SOFT_DELETES Option to omit a WHERE clause restricting to non-soft-deleted objects (only relevant if the candidate has soft-delete enabled.
static String	OPTION_RESTRICT_DISCRIM Option to add a WHERE clause to restrict to the discriminator value.
static String	OPTION_SELECT_DN_TYPE Option to add "DN_TYPE" to the SELECT clause as kind of discriminator.

Method Summary

Modifier and Type	Method and Description
SelectStatement	getStatement(org.datanucleus.ExecutionContext ec) Accessor for the statement.
boolean	hasOption(String name) Whether the generator has a particular option set.
SelectStatementGenerator	setOption(String name) Method to set a property.
void	setParentStatement(SQLStatement stmt) Method to set the parent statement.
SelectStatementGenerator	unsetOption(String name) Method to unset a property.

Field Detail

OPTION_ALLOW_NULLS

static final String OPTION_ALLOW_NULLS

Option to allow null values as elements of an array or collection.

See Also:

Constant Field Values

OPTION_SELECT_DN_TYPE

static final String OPTION_SELECT_DN_TYPE

Option to add "DN_TYPE" to the SELECT clause as kind of discriminator.

See Also:

Constant Field Values

OPTION_RESTRICT_DISCRIM

static final String OPTION_RESTRICT_DISCRIM

Option to add a WHERE clause to restrict to the discriminator value.

See Also:

Constant Field Values

OPTION_INCLUDE_SOFT_DELETES

static final String OPTION_INCLUDE_SOFT_DELETES

Option to omit a WHERE clause restricting to non-soft-deleted objects (only relevant if the candidate has soft-delete enabled.

See Also:

Constant Field Values

Method Detail

getStatement

SelectStatement getStatement(org.datanucleus.ExecutionContext ec)

Accessor for the statement.

Parameters:

ec - ExecutionContext

Returns:

The SQLStatement

setParentStatement

void setParentStatement(SQLStatement stmt)

Method to set the parent statement. Must be set before calling getStatement().

Parameters:

stmt - The parent statement

setOption

SelectStatementGenerator setOption(String name)

Method to set a property.

Parameters:

name - Name of the property

Returns:

This generator

unsetOption

SelectStatementGenerator unsetOption(String name)

Method to unset a property.

Parameters:

name - Name of the property

Returns:

This generator

hasOption

boolean hasOption(String name)

Whether the generator has a particular option set.

Parameters:

name - Name of the option

Returns:

Whether it is set