// implement RelNode
public RelOptCost computeSelfCost(RelOptPlanner planner) {
double dRows = RelMetadataQuery.getRowCount(this);
// Assume CPU is negligible since values are precomputed.
double dCpu = 1;
double dIo = 0;
return planner.makeCost(dRows, dCpu, dIo);
}
/**
* Creates new RelNodes replacing/removing the original project/row scan
*
* @param projectedScan new scan that is now projected
* @param origProject original projection
* @param needRename true if fields from the row scan need to be renamed
* @param newProject projection that contains the new projection expressions, in the case where
* the original projection cannot be removed because it projects expressions
* @return new RelNode
*/
public RelNode createNewRelNode(
RelNode projectedScan, ProjectRel origProject, boolean needRename, ProjectRel newProject) {
RelNode scanRel;
if (needRename) {
// Replace calling convention with FENNEL_EXEC_CONVENTION
RelTraitSet traits = RelOptUtil.clone(origProject.getTraits());
traits.setTrait(CallingConventionTraitDef.instance, FennelRel.FENNEL_EXEC_CONVENTION);
if (!traits.equals(projectedScan.getTraits())) {
RelNode mergedProjectedScan = convert(projectedScan, traits);
RelOptPlanner planner = projectedScan.getCluster().getPlanner();
// register projectedScan == mergedProjectedScan
// so mergedProjectedScan will have a set later on
projectedScan = planner.ensureRegistered(mergedProjectedScan, projectedScan);
}
scanRel =
new FennelRenameRel(
origProject.getCluster(),
projectedScan,
RelOptUtil.getFieldNames(origProject.getRowType()),
traits);
} else {
scanRel = projectedScan;
}
if (newProject == null) {
return scanRel;
} else {
// in the case where the projection had expressions, put the
// new, modified projection on top of the projected row scan
return (ProjectRel)
CalcRel.createProject(
scanRel,
newProject.getProjectExps(),
RelOptUtil.getFieldNames(newProject.getRowType()));
}
}
public OptiqPreparingStmt(
CatalogReader catalogReader, RelDataTypeFactory typeFactory, Schema schema) {
super(catalogReader);
this.schema = schema;
planner = new VolcanoPlanner();
planner.addRelTraitDef(CallingConventionTraitDef.instance);
RelOptUtil.registerAbstractRels(planner);
planner.addRule(JavaRules.ENUMERABLE_JOIN_RULE);
planner.addRule(JavaRules.ENUMERABLE_CALC_RULE);
planner.addRule(JavaRules.ENUMERABLE_AGGREGATE_RULE);
planner.addRule(JavaRules.ENUMERABLE_SORT_RULE);
planner.addRule(JavaRules.ENUMERABLE_UNION_RULE);
planner.addRule(JavaRules.ENUMERABLE_INTERSECT_RULE);
planner.addRule(JavaRules.ENUMERABLE_MINUS_RULE);
planner.addRule(TableAccessRule.instance);
rexBuilder = new RexBuilder(typeFactory);
}
public RelOptCost computeSelfCost(RelOptPlanner planner) {
double dRows = RelMetadataQuery.getRowCount(this);
double dCpu = RelMetadataQuery.getRowCount(getChild()) * program.getExprCount();
double dIo = 0;
return planner.makeCost(dRows, dCpu, dIo);
}
// implement RelNode
public RelOptCost computeSelfCost(RelOptPlanner planner) {
return planner.makeTinyCost();
}