Class SingleRowTableSupport

java.lang.Object

org.hibernate.dialect.sql.ast.spi.SingleRowTableSupport

@SPI({USE,SUPPLY})
public final class SingleRowTableSupport
extends Object

Immutable description of the SQL used by a Dialect for a reusable single-row table and for an otherwise table-less select.

Providers supply a stable profile through Dialect.getSingleRowTableSupport(). The table expression is used where SQL requires a reusable one-row table expression. The select-only from clause is a complete fragment, including any alias or restriction required by the database; an empty fragment means that an otherwise table-less select requires no from clause.

Consumers must select the accessor matching the rendering context and must not derive one value from the other. Providers refining a Dialect family profile should copy the profile returned by the superclass and change only the values which differ.

Since:

8.0

See Also:

• Dialect.getSingleRowTableSupport()

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	SingleRowTableSupport.Builder	Build an immutable single-row-table-support profile.

Field Summary

Fields

Modifier and Type	Field	Description
static final SingleRowTableSupport	STANDARD	The base-Dialect profile: a standard values-table expression and no select-only from clause.

Method Summary

Modifier and Type	Method	Description
static SingleRowTableSupport.Builder	builder()	Create a builder initialized from STANDARD.
static SingleRowTableSupport.Builder	builder(SingleRowTableSupport base)	Create a builder initialized with both rendering values of the given profile.
String	getSelectOnlyFromClause()	The complete from fragment for an otherwise table-less select, or the empty string when no fragment is required.
String	getTableExpression()	The nonblank table expression representing exactly one row.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

STANDARD

public static final SingleRowTableSupport STANDARD

The base-Dialect profile: a standard values-table expression and no select-only from clause.

Method Details

builder

public static SingleRowTableSupport.Builder builder()

Create a builder initialized from STANDARD.

builder

public static SingleRowTableSupport.Builder builder(SingleRowTableSupport base)

Create a builder initialized with both rendering values of the given profile.

Parameters:

base - the non-null profile to copy

getTableExpression

public String getTableExpression()

The nonblank table expression representing exactly one row.

getSelectOnlyFromClause

public String getSelectOnlyFromClause()

The complete from fragment for an otherwise table-less select, or the empty string when no fragment is required.