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PlanNode(mapping=None, *, ignore_unknown_fields=False, **kwargs)
Node information for nodes appearing in a
QueryPlan.plan_nodes][google.spanner.v1.QueryPlan.plan_nodes]
.
Attributes | |
---|---|
Name | Description |
index |
int
The PlanNode 's index in [node
list][google.spanner.v1.QueryPlan.plan_nodes].
|
kind |
Used to determine the type of node. May be needed for visualizing different kinds of nodes differently. For example, If the node is a SCALAR][google.spanner.v1.PlanNode.Kind.SCALAR] node, it
will have a condensed representation which can be used to
directly embed a description of the node in its parent.
|
display_name |
str
The display name for the node. |
child_links |
Sequence[
List of child node index \ es and their relationship to
this parent.
|
short_representation |
Condensed representation for SCALAR][google.spanner.v1.PlanNode.Kind.SCALAR] nodes.
|
metadata |
Attributes relevant to the node contained in a group of key-value pairs. For example, a Parameter Reference node could have the following information in its metadata: :: { "parameter_reference": "param1", "parameter_type": "array" } |
execution_stats |
The execution statistics associated with the node, contained in a group of key-value pairs. Only present if the plan was returned as a result of a profile query. For example, number of executions, number of rows/time per execution etc. |
Classes
ChildLink
ChildLink(mapping=None, *, ignore_unknown_fields=False, **kwargs)
Metadata associated with a parent-child relationship appearing in a
PlanNode][google.spanner.v1.PlanNode]
.
Kind
Kind(value)
The kind of PlanNode][google.spanner.v1.PlanNode]
. Distinguishes
between the two different kinds of nodes that can appear in a query
plan.
ShortRepresentation
ShortRepresentation(mapping=None, *, ignore_unknown_fields=False, **kwargs)
Condensed representation of a node and its subtree. Only present for
SCALAR
[PlanNode(s)][google.spanner.v1.PlanNode].