How to use

getValue

method

in

org.h2.expression.JavaFunction

@Override
public Expression[] getExpressionColumns(Session session) {
  switch (getType()) {
  case Value.RESULT_SET:
    ValueResultSet rs = getValueForColumnList(session, getArgs());
    return getExpressionColumns(session, rs.getResultSet());
  case Value.ARRAY:
    return getExpressionColumns(session, (ValueArray) getValue(session));
  }
  return super.getExpressionColumns(session);
}

@Override
public Expression optimize(Session session) {
  boolean allConst = isDeterministic();
  for (int i = 0, len = args.length; i < len; i++) {
    Expression e = args[i].optimize(session);
    args[i] = e;
    allConst &= e.isConstant();
  }
  if (allConst) {
    return ValueExpression.get(getValue(session));
  }
  return this;
}

@Override
public Expression[] getExpressionColumns(Session session) {
  switch (getType()) {
  case Value.RESULT_SET:
    ValueResultSet rs = getValueForColumnList(session, getArgs());
    return getExpressionColumns(session, rs.getResultSet());
  case Value.ARRAY:
    return getExpressionColumns(session, (ValueArray) getValue(session));
  }
  return super.getExpressionColumns(session);
}

@Override
public Expression optimize(Session session) {
  boolean allConst = isDeterministic();
  for (int i = 0, len = args.length; i < len; i++) {
    Expression e = args[i].optimize(session);
    args[i] = e;
    allConst &= e.isConstant();
  }
  if (allConst) {
    return ValueExpression.get(getValue(session));
  }
  return this;
}

@Override
public Expression[] getExpressionColumns(Session session) {
  switch (getType()) {
  case Value.RESULT_SET:
    ValueResultSet rs = getValueForColumnList(session, getArgs());
    return getExpressionColumns(session, rs.getResultSet());
  case Value.ARRAY:
    return getExpressionColumns(session, (ValueArray) getValue(session));
  }
  return super.getExpressionColumns(session);
}

@Override
public Expression optimize(Session session) {
  boolean allConst = isDeterministic();
  for (int i = 0, len = args.length; i < len; i++) {
    Expression e = args[i].optimize(session);
    args[i] = e;
    allConst &= e.isConstant();
  }
  if (allConst) {
    return ValueExpression.get(getValue(session));
  }
  return this;
}