How to use

operandJ

method

in

org.apache.calcite.rel.rules.ProjectRemoveRule

/**
 * Creates a ProjectRemoveRule.
 *
 * @param relBuilderFactory Builder for relational expressions
 */
public ProjectRemoveRule(RelBuilderFactory relBuilderFactory) {
 // Create a specialized operand to detect non-matches early. This keeps
 // the rule queue short.
 super(operandJ(Project.class, null, ProjectRemoveRule::isTrivial, any()),
   relBuilderFactory, null);
}

/**
 * Creates a ProjectRemoveRule.
 *
 * @param relBuilderFactory Builder for relational expressions
 */
public ProjectRemoveRule(RelBuilderFactory relBuilderFactory) {
 // Create a specialized operand to detect non-matches early. This keeps
 // the rule queue short.
 super(operandJ(Project.class, null, ProjectRemoveRule::isTrivial, any()),
   relBuilderFactory, null);
}