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Clarify the performance warning.

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keymaster 2011-12-21 12:24:37 +02:00
parent 041a4e0b43
commit 0b819ca3b0
1 changed files with 8 additions and 8 deletions
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16
en/reference/inheritance-mapping.rst
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@ -140,10 +140,10 @@ relationships involving types that employ this mapping strategy are
very performant.
There is a general performance consideration with Single Table
Inheritance: If you use a STI entity as a many-to-one or one-to-one
entity you should never use one of the classes at the upper levels
of the inheritance hierachy as "targetEntity", only those that have
no subclasses. Otherwise Doctrine *CANNOT* create proxy instances
Inheritance: If the target-entity of a many-to-one or one-to-one
association is an STI entity, it is preferable for performance reasons that it
be a leaf entity in the inheritance heirarchy, (ie. have no subclasses).
Otherwise Doctrine *CANNOT* create proxy instances
of this entity and will *ALWAYS* load the entity eagerly.
SQL Schema considerations
@ -243,10 +243,10 @@ themselves on access of any subtype fields, so accessing fields of
subtypes after such a query is not safe.
There is a general performance consideration with Class Table
Inheritance: If you use a CTI entity as a many-to-one or one-to-one
entity you should never use one of the classes at the upper levels
of the inheritance hierachy as "targetEntity", only those that have
no subclasses. Otherwise Doctrine *CANNOT* create proxy instances
Inheritance: If the target-entity of a many-to-one or one-to-one
association is a CTI entity, it is preferable for performance reasons that it
be a leaf entity in the inheritance heirarchy, (ie. have no subclasses).
Otherwise Doctrine *CANNOT* create proxy instances
of this entity and will *ALWAYS* load the entity eagerly.
SQL Schema considerations