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com.mapd.calcite.parser.ProjectProjectRemoveRule Class Reference
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Public Member Functions

 ProjectProjectRemoveRule (RelBuilderFactory relBuilderFactory)
 
void onMatch (RelOptRuleCall call)
 

Static Public Attributes

static final
ProjectProjectRemoveRule 
INSTANCE
 

Static Package Functions

static RelNode unwrap (RelNode node)
 

Private Attributes

ProjectRemoveRule innerRule
 

Detailed Description

removes identical projection nodes, if they are not the outer most projection or if the child is a projection

Definition at line 32 of file ProjectProjectRemoveRule.java.

Constructor & Destructor Documentation

com.mapd.calcite.parser.ProjectProjectRemoveRule.ProjectProjectRemoveRule ( RelBuilderFactory  relBuilderFactory)
inline

Creates a ProjectRemoveRule.

Parameters
relBuilderFactoryBuilder for relational expressions

Definition at line 51 of file ProjectProjectRemoveRule.java.

References com.mapd.calcite.parser.ProjectProjectRemoveRule.innerRule.

51  {
52  super(operandJ(Project.class, null, ProjectRemoveRule::isTrivial, any()),
53  relBuilderFactory,
54  null);
55  innerRule = new ProjectRemoveRule(relBuilderFactory);
56  }

Member Function Documentation

void com.mapd.calcite.parser.ProjectProjectRemoveRule.onMatch ( RelOptRuleCall  call)
inline

Definition at line 59 of file ProjectProjectRemoveRule.java.

References com.mapd.calcite.parser.ProjectProjectRemoveRule.unwrap().

59  {
60  boolean hasParents = null != call.getParents() && !call.getParents().isEmpty();
61  Project project = (Project) call.rel(0);
62  boolean inputIsProject = unwrap(project.getInput()) instanceof Project;
63  if (hasParents || inputIsProject) {
64  innerRule.onMatch(call);
65  }
66  }

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static RelNode com.mapd.calcite.parser.ProjectProjectRemoveRule.unwrap ( RelNode  node)
inlinestaticpackage

Definition at line 33 of file ProjectProjectRemoveRule.java.

Referenced by com.mapd.calcite.parser.ProjectProjectRemoveRule.onMatch().

33  {
34  if (node instanceof HepRelVertex) {
35  return unwrap(((HepRelVertex) node).getCurrentRel());
36  }
37 
38  return node;
39  }

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Member Data Documentation

ProjectRemoveRule com.mapd.calcite.parser.ProjectProjectRemoveRule.innerRule
private
final ProjectProjectRemoveRule com.mapd.calcite.parser.ProjectProjectRemoveRule.INSTANCE
static
Initial value:
=
new ProjectProjectRemoveRule(RelFactories.LOGICAL_BUILDER)

Definition at line 41 of file ProjectProjectRemoveRule.java.

Referenced by com.mapd.calcite.parser.MapDParser.queryToSqlNode().


The documentation for this class was generated from the following file: