Inheritance diagram for com.mapd.calcite.parser.ProjectProjectRemoveRule:

Collaboration diagram for com.mapd.calcite.parser.ProjectProjectRemoveRule:

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

relBuilderFactory Builder for relational expressions

Definition at line 51 of file ProjectProjectRemoveRule.java.

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

                                                                        {
     super(operandJ(Project.class, null, ProjectRemoveRule::isTrivial, any()),
             relBuilderFactory,
             null);
     innerRule = new ProjectRemoveRule(relBuilderFactory);
   }

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().

                                            {
     boolean hasParents = null != call.getParents() && !call.getParents().isEmpty();
     Project project = (Project) call.rel(0);
     boolean inputIsProject = unwrap(project.getInput()) instanceof Project;
     if (hasParents || inputIsProject) {
       innerRule.onMatch(call);
     }
   }

Here is the call graph for this function:

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().

                                       {
     if (node instanceof HepRelVertex) {
       return unwrap(((HepRelVertex) node).getCurrentRel());
     }
 
     return node;
   }