Join information prepared for fast attribute id mapping in QgsVectorLayerJoinBuffer::updateFeatureAttributes(). More...

#include <qgsvectorlayerfeatureiterator.h>

Public Member Functions
void	addJoinedAttributesCached (QgsFeature &f, const QVariant &joinValue) const

void	addJoinedAttributesDirect (QgsFeature &f, const QVariant &joinValue) const

Public Attributes
QgsAttributeList	attributes
	Attributes to fetch.

QMap< int, int >	attributesSourceToDestLayerMap
	Mapping from original attribute index to the joined layer index.

int	indexOffset
	At what position the joined fields start.

int	joinField

const QgsVectorLayerJoinInfo *	joinInfo
	Canonical source of information about the join.

QgsFields	joinLayerFields
	Fields from joined layer.

std::shared_ptr< QgsVectorLayerFeatureSource >	joinSource
	Feature source for join.

int	targetField
	Index of field (of this layer) that drives the join.

Detailed Description

Join information prepared for fast attribute id mapping in QgsVectorLayerJoinBuffer::updateFeatureAttributes().

Created in the select() method of QgsVectorLayerJoinBuffer for the joins that contain fetched attributes

Definition at line 173 of file qgsvectorlayerfeatureiterator.h.

Member Function Documentation

◆ addJoinedAttributesCached()

void QgsVectorLayerFeatureIterator::FetchJoinInfo::addJoinedAttributesCached	(	QgsFeature &	f,
		const QVariant &	joinValue
	)		const

Definition at line 1152 of file qgsvectorlayerfeatureiterator.cpp.

◆ addJoinedAttributesDirect()

void QgsVectorLayerFeatureIterator::FetchJoinInfo::addJoinedAttributesDirect	(	QgsFeature &	f,
		const QVariant &	joinValue
	)		const

Definition at line 1170 of file qgsvectorlayerfeatureiterator.cpp.

Member Data Documentation

◆ attributes

QgsAttributeList QgsVectorLayerFeatureIterator::FetchJoinInfo::attributes

Attributes to fetch.

Definition at line 178 of file qgsvectorlayerfeatureiterator.h.

◆ attributesSourceToDestLayerMap

QMap<int, int> QgsVectorLayerFeatureIterator::FetchJoinInfo::attributesSourceToDestLayerMap

Mapping from original attribute index to the joined layer index.

Definition at line 180 of file qgsvectorlayerfeatureiterator.h.

◆ indexOffset

int QgsVectorLayerFeatureIterator::FetchJoinInfo::indexOffset

At what position the joined fields start.

Definition at line 182 of file qgsvectorlayerfeatureiterator.h.

◆ joinField

int QgsVectorLayerFeatureIterator::FetchJoinInfo::joinField

Definition at line 207 of file qgsvectorlayerfeatureiterator.h.

◆ joinInfo

const QgsVectorLayerJoinInfo* QgsVectorLayerFeatureIterator::FetchJoinInfo::joinInfo

Canonical source of information about the join.

Definition at line 176 of file qgsvectorlayerfeatureiterator.h.

◆ joinLayerFields

QgsFields QgsVectorLayerFeatureIterator::FetchJoinInfo::joinLayerFields

Fields from joined layer.

Note: Not available in Python bindings

Since: QGIS 3.20

Definition at line 200 of file qgsvectorlayerfeatureiterator.h.

◆ joinSource

std::shared_ptr< QgsVectorLayerFeatureSource > QgsVectorLayerFeatureIterator::FetchJoinInfo::joinSource

Feature source for join.

Note: Not available in Python bindings

Since: QGIS 3.20

Definition at line 192 of file qgsvectorlayerfeatureiterator.h.

◆ targetField

int QgsVectorLayerFeatureIterator::FetchJoinInfo::targetField

Index of field (of this layer) that drives the join.

Index of field (of the joined layer) must have equal value

Definition at line 204 of file qgsvectorlayerfeatureiterator.h.

The documentation for this struct was generated from the following files:

/build/qgis-3.41.0+git20241119+45a0abf3bec+99sid/src/core/vector/qgsvectorlayerfeatureiterator.h
/build/qgis-3.41.0+git20241119+45a0abf3bec+99sid/src/core/vector/qgsvectorlayerfeatureiterator.cpp

Public Member Functions

Public Attributes