org.apache.spark.sql.catalyst.expressions
AttributeReference
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package expressions
The name of this attribute, should only be used during analysis or for debugging.
The DataType of this attribute.
True if null is a valid value for this attribute.
The metadata of this attribute.
A globally unique id used to check if different AttributeReferences refer to the same attribute.
a list of strings that can be used to referred to this attribute in a fully qualified way. Consider the examples tableName.name, subQueryAlias.name. tableName and subQueryAlias are possible qualifiers.
The narrowest possible type that is produced when this expression is evaluated.
The narrowest possible type that is produced when this expression is evaluated.
Returns the tree node at the specified number.
Returns the tree node at the specified number. Numbers for each node can be found in the numberedTreeString.
Returns a string representing the arguments to this node, minus any children
Returns a string representing the arguments to this node, minus any children
Returns a 'scala code' representation of this TreeNode and its children.
Returns a 'scala code' representation of this TreeNode and its children. Intended for use
when debugging where the prettier toString function is obfuscating the actual structure. In the
case of 'pure' TreeNodes that only contain primitives and other TreeNodes, the result can be
pasted in the REPL to build an equivalent Tree.
Returns true if all the children of this expression have been resolved to a specific schema and false if any still contains any unresolved placeholders.
Returns true if all the children of this expression have been resolved to a specific schema and false if any still contains any unresolved placeholders.
Returns a Seq containing the result of applying a partial function to all elements in this tree on which the function is defined.
Returns a Seq containing the result of applying a partial function to all elements in this tree on which the function is defined.
Finds and returns the first TreeNode of the tree for which the given partial function is defined (pre-order), and applies the partial function to it.
The DataType of this attribute.
The DataType of this attribute.
Returns true when the current expression always return the same result for fixed input values.
Returns true when the current expression always return the same result for fixed input values.
Returns the result of evaluating this expression on a given input Row
Returns the result of evaluating this expression on a given input Row
A globally unique id used to check if different AttributeReferences refer to the same attribute.
A globally unique id used to check if different AttributeReferences refer to the same attribute.
Faster version of equality which short-circuits when two treeNodes are the same instance.
Faster version of equality which short-circuits when two treeNodes are the same instance.
We don't just override Object.equals, as doing so prevents the scala compiler from
generating case class equals methods
Find the first TreeNode that satisfies the condition specified by f.
Returns a Seq by applying a function to all nodes in this tree and using the elements of the resulting collections.
Returns a Seq by applying a function to all nodes in this tree and using the elements of the resulting collections.
Returns true when an expression is a candidate for static evaluation before the query is executed.
Returns true when an expression is a candidate for static evaluation before the query is executed.
The following conditions are used to determine suitability for constant folding:
Runs the given function on this node and then recursively on children.
Runs the given function recursively on children then on this node.
Appends the string represent of this node and its children to the given StringBuilder.
Appends the string represent of this node and its children to the given StringBuilder.
Creates a copy of this type of tree node after a transformation.
Creates a copy of this type of tree node after a transformation. Must be overridden by child classes that have constructor arguments that are not present in the productIterator.
the new product arguments.
Returns a Seq containing the result of applying the given function to each node in this tree in a preorder traversal.
Returns a Seq containing the result of applying the given function to each node in this tree in a preorder traversal.
the function to be applied.
Returns a copy of this node where f has been applied to all the nodes children.
Returns a copy of this node where f has been applied to all the nodes children.
The metadata of this attribute.
The metadata of this attribute.
The name of this attribute, should only be used during analysis or for debugging.
The name of this attribute, should only be used during analysis or for debugging.
Returns the name of this type of TreeNode.
Returns the name of this type of TreeNode. Defaults to the class name.
True if null is a valid value for this attribute.
True if null is a valid value for this attribute.
Returns a string representation of the nodes in this tree, where each operator is numbered.
Args to the constructor that should be copied, but not transformed.
Args to the constructor that should be copied, but not transformed. These are appended to the transformed args automatically by makeCopy
Returns a string representation of this expression that does not have developer centric debugging information like the expression id.
Returns a string representation of this expression that does not have developer centric debugging information like the expression id.
Returns a dot separated fully qualified name for this attribute.
Returns a dot separated fully qualified name for this attribute. Given that there can be multiple qualifiers, it is possible that there are other possible way to refer to this attribute.
a list of strings that can be used to referred to this attribute in a fully qualified way.
a list of strings that can be used to referred to this attribute in a fully qualified way. Consider the examples tableName.name, subQueryAlias.name. tableName and subQueryAlias are possible qualifiers.
Returns true if this expression and all its children have been resolved to a specific schema
and false if it still contains any unresolved placeholders.
Returns true if this expression and all its children have been resolved to a specific schema
and false if it still contains any unresolved placeholders. Implementations of expressions
should override this if the resolution of this type of expression involves more than just
the resolution of its children.
Returns true iff the expression id is the same for both attributes.
Returns true when two expressions will always compute the same result, even if they differ cosmetically (i.e.
Returns true when two expressions will always compute the same result, even if they differ cosmetically (i.e. capitalization of names in attributes may be different).
String representation of this node without any children
String representation of this node without any children
The arguments that should be included in the arg string.
The arguments that should be included in the arg string. Defaults to the productIterator.
Returns a copy of this node where rule has been recursively applied to the tree.
Returns a copy of this node where rule has been recursively applied to the tree.
When rule does not apply to a given node it is left unchanged.
Users should not expect a specific directionality. If a specific directionality is needed,
transformDown or transformUp should be used.
the function use to transform this nodes children
Returns a copy of this node where rule has been recursively applied to all the children of
this node.
Returns a copy of this node where rule has been recursively applied to all the children of
this node. When rule does not apply to a given node it is left unchanged.
the function used to transform this nodes children
Returns a copy of this node where rule has been recursively applied to it and all of its
children (pre-order).
Returns a copy of this node where rule has been recursively applied to it and all of its
children (pre-order). When rule does not apply to a given node it is left unchanged.
the function used to transform this nodes children
Returns a copy of this node where rule has been recursively applied first to all of its
children and then itself (post-order).
Returns a copy of this node where rule has been recursively applied first to all of its
children and then itself (post-order). When rule does not apply to a given node, it is left
unchanged.
the function use to transform this nodes children
Returns a string representation of the nodes in this tree
Returns a string representation of the nodes in this tree
Returns a copy of this node with the children replaced.
Returns a copy of this node with the children replaced. TODO: Validate somewhere (in debug mode?) that children are ordered correctly.
Returns a copy of this AttributeReference with changed nullability.
Returns a copy of this AttributeReference with changed nullability.
Returns a copy of this AttributeReference with new qualifiers.
Returns a copy of this AttributeReference with new qualifiers.
A reference to an attribute produced by another operator in the tree.
The name of this attribute, should only be used during analysis or for debugging.
The DataType of this attribute.
True if null is a valid value for this attribute.
The metadata of this attribute.
A globally unique id used to check if different AttributeReferences refer to the same attribute.
a list of strings that can be used to referred to this attribute in a fully qualified way. Consider the examples tableName.name, subQueryAlias.name. tableName and subQueryAlias are possible qualifiers.