public class JoinProjectTransposeRule extends RelOptRule
Join
one of whose inputs is a
LogicalProject
, and
pulls the project up.
Projections are pulled up if the
LogicalProject
doesn't originate from
a null generating input in an outer join.
Modifier and Type | Field and Description |
---|---|
static JoinProjectTransposeRule |
BOTH_PROJECT |
static JoinProjectTransposeRule |
BOTH_PROJECT_INCLUDE_OUTER |
private boolean |
includeOuter |
static JoinProjectTransposeRule |
LEFT_PROJECT |
static JoinProjectTransposeRule |
LEFT_PROJECT_INCLUDE_OUTER |
static JoinProjectTransposeRule |
RIGHT_PROJECT |
static JoinProjectTransposeRule |
RIGHT_PROJECT_INCLUDE_OUTER |
description, operands, relBuilderFactory
Constructor and Description |
---|
JoinProjectTransposeRule(RelOptRuleOperand operand,
java.lang.String description)
Creates a JoinProjectTransposeRule with default factory.
|
JoinProjectTransposeRule(RelOptRuleOperand operand,
java.lang.String description,
boolean includeOuter,
RelBuilderFactory relBuilderFactory)
Creates a JoinProjectTransposeRule.
|
JoinProjectTransposeRule(RelOptRuleOperand operand,
java.lang.String description,
boolean includeOuter,
RelFactories.ProjectFactory projectFactory)
Deprecated.
|
JoinProjectTransposeRule(RelOptRuleOperand operand,
java.lang.String description,
RelFactories.ProjectFactory projectFactory)
Deprecated.
|
Modifier and Type | Method and Description |
---|---|
protected void |
createProjectExprs(Project projRel,
RelNode joinChild,
int adjustmentAmount,
RexBuilder rexBuilder,
java.util.List<RelDataTypeField> joinChildrenFields,
java.util.List<Pair<RexNode,java.lang.String>> projects)
Creates projection expressions corresponding to one of the inputs into
the join
|
protected RelNode |
getProjectChild(RelOptRuleCall call,
Project project,
boolean leftChild)
Returns the child of the project that will be used as input into the new
LogicalJoin once the projects are pulled above the LogicalJoin.
|
protected Project |
getRightChild(RelOptRuleCall call) |
protected boolean |
hasLeftChild(RelOptRuleCall call) |
protected boolean |
hasRightChild(RelOptRuleCall call) |
void |
onMatch(RelOptRuleCall call)
Receives notification about a rule match.
|
any, convert, convert, convertList, convertOperand, convertOperand, equals, equals, getOperand, getOperands, getOutConvention, getOutTrait, hashCode, matches, none, operand, operand, operand, operand, operand, operandJ, operandJ, some, toString, unordered
public static final JoinProjectTransposeRule BOTH_PROJECT
public static final JoinProjectTransposeRule LEFT_PROJECT
public static final JoinProjectTransposeRule RIGHT_PROJECT
public static final JoinProjectTransposeRule BOTH_PROJECT_INCLUDE_OUTER
public static final JoinProjectTransposeRule LEFT_PROJECT_INCLUDE_OUTER
public static final JoinProjectTransposeRule RIGHT_PROJECT_INCLUDE_OUTER
private final boolean includeOuter
public JoinProjectTransposeRule(RelOptRuleOperand operand, java.lang.String description, boolean includeOuter, RelBuilderFactory relBuilderFactory)
public JoinProjectTransposeRule(RelOptRuleOperand operand, java.lang.String description)
@Deprecated public JoinProjectTransposeRule(RelOptRuleOperand operand, java.lang.String description, RelFactories.ProjectFactory projectFactory)
@Deprecated public JoinProjectTransposeRule(RelOptRuleOperand operand, java.lang.String description, boolean includeOuter, RelFactories.ProjectFactory projectFactory)
public void onMatch(RelOptRuleCall call)
RelOptRule
call.rels
holds the set of relational
expressions which match the operands to the rule;
call.rels[0]
is the root expression.
Typically a rule would check that the nodes are valid matches, creates
a new expression, then calls back RelOptRuleCall.transformTo(org.apache.calcite.rel.RelNode, java.util.Map<org.apache.calcite.rel.RelNode, org.apache.calcite.rel.RelNode>)
to
register the expression.
onMatch
in class RelOptRule
call
- Rule callRelOptRule.matches(RelOptRuleCall)
protected boolean hasLeftChild(RelOptRuleCall call)
call
- RelOptRuleCallprotected boolean hasRightChild(RelOptRuleCall call)
call
- RelOptRuleCallprotected Project getRightChild(RelOptRuleCall call)
call
- RelOptRuleCallprotected RelNode getProjectChild(RelOptRuleCall call, Project project, boolean leftChild)
call
- RelOptRuleCallproject
- project RelNodeleftChild
- true if the project corresponds to the left projectionprotected void createProjectExprs(Project projRel, RelNode joinChild, int adjustmentAmount, RexBuilder rexBuilder, java.util.List<RelDataTypeField> joinChildrenFields, java.util.List<Pair<RexNode,java.lang.String>> projects)
projRel
- the projection input into the join (if it exists)joinChild
- the child of the projection input (if there is a
projection); otherwise, this is the join inputadjustmentAmount
- the amount the expressions need to be shifted byrexBuilder
- rex builderjoinChildrenFields
- concatenation of the fields from the left and
right join inputs (once the projections have been
removed)projects
- Projection expressions & names to be createdCopyright © 2012–2019 The Apache Software Foundation. All rights reserved.