How to use

equals

method

in

org.apache.hyracks.algebricks.core.algebra.expressions.ScalarFunctionCallExpression

  @Override
  public boolean transform(Mutable<ILogicalExpression> exprRef) {
    ILogicalExpression expr = exprRef.getValue();
    if (expr.getExpressionTag() != LogicalExpressionTag.FUNCTION_CALL) {
      return false;
    }
    AbstractFunctionCallExpression funcExpr = (AbstractFunctionCallExpression) expr;
    if (!funcExpr.getFunctionIdentifier().equals(BuiltinFunctions.META_KEY)) {
      return false;
    }

    // function is meta key access
    for (int i = 0; i < metaKeyAccessExpressions.size(); i++) {
      if (metaKeyAccessExpressions.get(i).equals(funcExpr)) {
        VariableReferenceExpression varRef = new VariableReferenceExpression(keyVars.get(i));
        varRef.setSourceLocation(expr.getSourceLocation());
        exprRef.setValue(varRef);
        return true;
      }
    }
    return false;
  }
}