QGIS API Documentation
3.10.0-A Coruña (6c816b4204)
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An expression node for value IN or NOT IN clauses. More...
#include <qgsexpressionnodeimpl.h>
Public Member Functions | |
QgsExpressionNodeInOperator (QgsExpressionNode *node, QgsExpressionNode::NodeList *list, bool notin=false) | |
This node tests if the result of node is in the result of list. More... | |
~QgsExpressionNodeInOperator () override | |
QgsExpressionNode * | clone () const override |
Generate a clone of this node. More... | |
QString | dump () const override |
Dump this node into a serialized (part) of an expression. More... | |
QVariant | evalNode (QgsExpression *parent, const QgsExpressionContext *context) override |
Abstract virtual eval method Errors are reported to the parent. More... | |
bool | isNotIn () const |
Returns true if this node is a "NOT IN" operator, or false if the node is a normal "IN" operator. More... | |
bool | isStatic (QgsExpression *parent, const QgsExpressionContext *context) const override |
Returns true if this node can be evaluated for a static value. More... | |
QgsExpressionNode::NodeList * | list () const |
Returns the list of nodes to search for matching values within. More... | |
bool | needsGeometry () const override |
Abstract virtual method which returns if the geometry is required to evaluate this expression. More... | |
QgsExpressionNode * | node () const |
Returns the expression node. More... | |
QList< const QgsExpressionNode * > | nodes () const override |
Returns a list of all nodes which are used in this expression. More... | |
QgsExpressionNode::NodeType | nodeType () const override |
Gets the type of this node. More... | |
bool | prepareNode (QgsExpression *parent, const QgsExpressionContext *context) override |
Abstract virtual preparation method Errors are reported to the parent. More... | |
QSet< QString > | referencedColumns () const override |
Abstract virtual method which returns a list of columns required to evaluate this node. More... | |
QSet< QString > | referencedFunctions () const override |
Returns a set of all functions which are used in this expression. More... | |
QSet< QString > | referencedVariables () const override |
Returns a set of all variables which are used in this expression. More... | |
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virtual | ~QgsExpressionNode ()=default |
QVariant | eval (QgsExpression *parent, const QgsExpressionContext *context) |
Evaluate this node with the given context and parent. More... | |
bool | prepare (QgsExpression *parent, const QgsExpressionContext *context) |
Prepare this node for evaluation. More... | |
Additional Inherited Members | |
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enum | NodeType { ntUnaryOperator, ntBinaryOperator, ntInOperator, ntFunction, ntLiteral, ntColumnRef, ntCondition, ntIndexOperator } |
Known node types. More... | |
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int | parserFirstColumn = 0 |
First column in the parser this node was found. More... | |
int | parserFirstLine = 0 |
First line in the parser this node was found. More... | |
int | parserLastColumn = 0 |
Last column in the parser this node was found. More... | |
int | parserLastLine = 0 |
Last line in the parser this node was found. More... | |
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void | cloneTo (QgsExpressionNode *target) const |
Copies the members of this node to the node provided in target. More... | |
An expression node for value IN or NOT IN clauses.
Definition at line 264 of file qgsexpressionnodeimpl.h.
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inline |
This node tests if the result of node is in the result of list.
Optionally it can be inverted with notin which by default is false
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Definition at line 271 of file qgsexpressionnodeimpl.h.
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override |
Definition at line 828 of file qgsexpressionnodeimpl.cpp.
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overridevirtual |
Generate a clone of this node.
Ownership is transferred to the caller.
Implements QgsExpressionNode.
Definition at line 855 of file qgsexpressionnodeimpl.cpp.
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overridevirtual |
Dump this node into a serialized (part) of an expression.
The returned expression does not necessarily literally match the original expression, it's just guaranteed to behave the same way.
Implements QgsExpressionNode.
Definition at line 850 of file qgsexpressionnodeimpl.cpp.
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overridevirtual |
Abstract virtual eval method Errors are reported to the parent.
Implements QgsExpressionNode.
Definition at line 777 of file qgsexpressionnodeimpl.cpp.
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inline |
Returns true
if this node is a "NOT IN" operator, or false
if the node is a normal "IN" operator.
Definition at line 286 of file qgsexpressionnodeimpl.h.
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overridevirtual |
Returns true
if this node can be evaluated for a static value.
This is used during the prepare() step and in case it returns true
, the value of this node will already be evaluated and the result cached (and therefore not re-evaluated in subsequent calls to eval()). In case this returns true
, prepareNode() will never be called.
Implements QgsExpressionNode.
Definition at line 862 of file qgsexpressionnodeimpl.cpp.
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inline |
Returns the list of nodes to search for matching values within.
Definition at line 291 of file qgsexpressionnodeimpl.h.
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overridevirtual |
Abstract virtual method which returns if the geometry is required to evaluate this expression.
This needs to call needsGeometry()
recursively on any child nodes.
true
if a geometry is required to evaluate this expression Implements QgsExpressionNode.
Definition at line 38 of file qgsexpressionnodeimpl.cpp.
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inline |
Returns the expression node.
Definition at line 281 of file qgsexpressionnodeimpl.h.
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overridevirtual |
Returns a list of all nodes which are used in this expression.
Implements QgsExpressionNode.
Definition at line 1535 of file qgsexpressionnodeimpl.cpp.
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overridevirtual |
Gets the type of this node.
Implements QgsExpressionNode.
Definition at line 834 of file qgsexpressionnodeimpl.cpp.
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overridevirtual |
Abstract virtual preparation method Errors are reported to the parent.
Implements QgsExpressionNode.
Definition at line 839 of file qgsexpressionnodeimpl.cpp.
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overridevirtual |
Abstract virtual method which returns a list of columns required to evaluate this node.
When reimplementing this, you need to return any column that is required to evaluate this node and in addition recursively collect all the columns required to evaluate child nodes.
Implements QgsExpressionNode.
Definition at line 1508 of file qgsexpressionnodeimpl.cpp.
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overridevirtual |
Returns a set of all functions which are used in this expression.
Implements QgsExpressionNode.
Definition at line 1526 of file qgsexpressionnodeimpl.cpp.
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overridevirtual |
Returns a set of all variables which are used in this expression.
Implements QgsExpressionNode.
Definition at line 1517 of file qgsexpressionnodeimpl.cpp.