Record Class DeleteRenderingPlan.JoinEmulation

java.lang.Object
java.lang.Record
org.hibernate.dialect.sql.ast.spi.DeleteRenderingPlan.JoinEmulation
Record Components:
targetAlias - alias used to correlate the emulation, or null for the standard unaliased form
All Implemented Interfaces:
DeleteRenderingPlan
Enclosing interface:
DeleteRenderingPlan
public static record DeleteRenderingPlan.JoinEmulation(@Nullable String targetAlias) extends Record implements DeleteRenderingPlan

Move joins which cannot appear directly in the delete into a correlated exists subquery in the where clause.

A joined semantic delete is rendered with the following general shape:

delete from book
where exists (
    select 1
    from author
    where author.id = book.author_id and ...
)

When targetAlias is non-null, the target is declared using that alias and the subquery includes a row-matching correlation between the target alias and the target table reference in the emulated from clause. This form is used by databases which require an explicit target alias to correlate the emulation safely.

Since:
8.0

  • Constructor Details

    • JoinEmulation

      public JoinEmulation()
      Select the standard, unaliased join-emulation form.

    • JoinEmulation

      public JoinEmulation(@Nullable String targetAlias)
      Creates an instance of a JoinEmulation record class.
      Parameters:
      targetAlias - the value for the targetAlias record component

  • Method Details

    • toString

      public final String toString()
      Returns a string representation of this record class. The representation contains the name of the class, followed by the name and value of each of the record components.
      Specified by:
      toString in class Record
      Returns:
      a string representation of this object

    • hashCode

      public final int hashCode()
      Returns a hash code value for this object. The value is derived from the hash code of each of the record components.
      Specified by:
      hashCode in class Record
      Returns:
      a hash code value for this object

    • equals

      public final boolean equals(Object o)
      Indicates whether some other object is "equal to" this one. The objects are equal if the other object is of the same class and if all the record components are equal. All components in this record class are compared with Objects::equals(Object,Object).
      Specified by:
      equals in class Record
      Parameters:
      o - the object with which to compare
      Returns:
      true if this object is the same as the o argument; false otherwise.

    • targetAlias

      @Nullable public String targetAlias()
      Returns the value of the targetAlias record component.
      Returns:
      the value of the targetAlias record component