public void ModOperator()
{
EvalStore c = new EvalStore();
Parser p = new Parser();
Expression s;
Expression r;
p = new Parser();
s = p.Parse("select 71 % 13");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[" + (71 % 13) + "]");
s = p.Parse("select d'01/01/2015 11:35:31' % 1m");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[00:00:31]");
s = p.Parse("select d'01/01/2015 11:35:31' % 1h");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[00:35:31]");
s = p.Parse("select d\"01/01/2015 11:35:31\" % 1d");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[11:35:31]");
}
public void SimpleSelect()
{
EvalStore c = new EvalStore();
Parser p = new Parser();
Expression s;
Expression r;
s = p.Parse("select '1', 2, 3");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1, 2, 3]");
s = p.Parse("select 1+2, 1+3, 1+4");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[3, 4, 5]");
s = p.Parse("select 1+e, pi+e, 100*pi");
c.Enter();
c.Put<Element>("pi", new Element(3.13149265));
c.Put<Element>("e", new Element(2.71828183));
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[3.71828183, 5.84977448, 313.149265]");
s = p.Parse("select '1+1' as c1, 2+2 as c2, 3+3 as c3");
c.Enter();
r = s.Evaluate(c);
c.Exit();
//Assert.AreEqual(r.ToString(), "[1, 2, 3]");
}
public Table Execute(string query)
{
try {
_dataLock.EnterReadLock();
Parser p = new Parser();
Expression s = p.Parse(query);
EvalStore store = new EvalStore();
store.Enter();
store.Put<Table>(_facts.Name, _facts);
store.Put<Table>(_attributes.Name, _attributes);
store.Put<Table>(_resources.Name, _resources);
store.Put<Table>(_contexts.Name, _contexts);
ConstExpr c = s.Evaluate(store) as ConstExpr;
store.Exit();
Table result = c.Value.GetObject<Table>();
return result;
}
catch (Exception ex) {
Trace.WriteLine(ex.Message);
return null;
}
finally {
_dataLock.ExitReadLock();
}
}
public void ConcatnateOperator()
{
EvalStore c = new EvalStore();
Parser p = new Parser();
Expression s;
Expression r;
s = p.Parse("select 123 + 'abc'");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[123abc]");
s = p.Parse("select 'abc' + 123");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[abc123]");
}
public void LikeOperator()
{
EvalStore c = new EvalStore();
Parser p = new Parser();
Expression s;
Expression r;
s = p.Parse("select 'rosemary' like '%rose%'");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 'rosemary' like '%rose'");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 'rosemary' like 'mary%'");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select not ('rosemary' like 'lamb%')");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 3.13149265 like '3.13149265')");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 3.13149265 like pi)");
c.Enter();
c.Put<Element>("pi", new Element(3.13141592653589793238462));
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 3.13149265+1 like pi+1)");
c.Enter();
c.Put<Element>("pi", new Element(3.13141592653589793238462));
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
}
public void SimpleSelectTest()
{
StringBuilder src = new StringBuilder();
src.AppendLine("select 3.1314+3");
Parser p = new Parser();
Expression s = p.Parse(src.ToString());
EvalStore c = new EvalStore();
Expression r = s.Evaluate(c);
src = new StringBuilder();
src.AppendLine("select 123+pi");
p = new Parser();
s = p.Parse(src.ToString());
c = new EvalStore();
c.Enter();
c.Put<Element>("pi", new Element(3.13149265358));
r = s.Evaluate(c);
c.Exit();
}
public void NowFunctionTest()
{
EvalStore c = new EvalStore();
Parser p = new Parser();
Expression s;
Expression r;
s = p.Parse("select now()");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[" + DateTime.Now.ToString() + "]");
s = p.Parse("select now()==now()");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select now()-3d");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[" + (DateTime.Now - new TimeSpan(3,0,0,0)).ToString() + "]");
s = p.Parse("select now()+30d");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[" + (DateTime.Now + new TimeSpan(30, 0, 0, 0)).ToString() + "]");
s = p.Parse("select now()+1d*5");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[" + (DateTime.Now + new TimeSpan(5, 0, 0, 0)).ToString() + "]");
s = p.Parse("select now() between now()-3d/3 and now()+3d");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
}
public void IsOperator()
{
EvalStore c = new EvalStore();
Parser p = new Parser();
Expression s;
Expression r;
s = p.Parse("select 1 IS NULL");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select 1 IS NOT NULL");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select NULL is NULL");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select !3.1314");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select NULL is NOT NULL");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select x is NULL");
c.Enter();
c.Put<Element>("x", Element.Empty);
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select x+1 is NULL");
c.Enter();
c.Put<Element>("x", Element.Empty);
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select x+1 ==1");
c.Enter();
c.Put<Element>("x", Element.Empty);
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[NULL]");
s = p.Parse("select x < 1 is NULL");
c.Enter();
c.Put<Element>("x", Element.Empty);
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select +x is NULL");
c.Enter();
c.Put<Element>("x", Element.Empty);
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select (0 AND 0) is false");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select (0 AND 1) is true");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select (1 AND 0) is false");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select (1 AND 1) is true");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select (0 AND NULL) is false");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select (1 AND NULL) is null");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select (NULL AND 0) is not null");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select (NULL AND 1) is null");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select (NULL AND NULL) is not null");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
}
public void LogicalAndAndOperator()
{
EvalStore c = new EvalStore();
Parser p = new Parser();
Expression s;
Expression r;
s = p.Parse("select 0 && 0");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select 0 && 1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select 1 && 0");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select 1 && 1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 0 && NULL");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select 1 && NULL");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[NULL]");
s = p.Parse("select NULL && 0");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select NULL && 1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[NULL]");
s = p.Parse("select NULL && NULL");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[NULL]");
s = p.Parse("select 1 && 'hello'");
c.Enter();
try {
r = s.Evaluate(c);
Assert.Fail("Exception not thrown for 1 AND 'hello'");
}
catch (Exception ex) {
Assert.AreEqual(ex.GetType(), typeof(InvalidOperationException));
Assert.AreEqual(ex.Message, "Error executing select: Error converting 'hello' to Boolean");
}
c.Exit();
s = p.Parse("select 1 && 3d");
c.Enter();
r = s.Evaluate(c);
Assert.AreEqual(r.ToString(), "[1]");
c.Exit();
s = p.Parse("select 3d && 1");
c.Enter();
r = s.Evaluate(c);
Assert.AreEqual(r.ToString(), "[1]");
c.Exit();
s = p.Parse("select 1 && d'01/12/2015'");
c.Enter();
r = s.Evaluate(c);
Assert.AreEqual(r.ToString(), "[1]");
c.Exit();
s = p.Parse("select d'01/12/2015' && 1");
c.Enter();
r = s.Evaluate(c);
Assert.AreEqual(r.ToString(), "[1]");
c.Exit();
}
static void TestParser()
{
Console.WriteLine("Enter statements followed by a ; and enter 'bye' to exit:");
while (true) {
StringBuilder sb = new StringBuilder();
while (true) {
string line = Console.ReadLine();
if (line.ToUpper() == "BYE") return;
if (line == ";") break;
if (line.EndsWith(";")) {
sb.AppendLine(line.Substring(0, line.Length - 1));
break;
}
sb.AppendLine(line);
}
using (MemoryStream ms = CreateStringStream(sb.ToString())) {
Parser p = new Parser(ms);
p.Parse();
}
}
}
static void Main(string[] args)
{
string src = "((1)*4)";
MemoryStream ms = CreateStringStream(src);
Parser p = new Parser(ms);
Expression n = p.Parse();
PrintTree(n, 0);
Console.WriteLine("Nodes: " + NodesCount(n));
Expression val = Evaluate(n);
Console.WriteLine(src + " = " + val);
Console.WriteLine();
//Console.ReadKey();
}
public void EqualOperator()
{
EvalStore c = new EvalStore();
Parser p = new Parser();
Expression s;
Expression r;
s = p.Parse("select 1=1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 1==1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 1==\"1\"");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 1=='2'");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select 3.131492==3.131492");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 1==1 OR 2==1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 1==1 AND 2==1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select 1==1 AND 2==2 AND 3==3");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 1==NULL");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[NULL]");
s = p.Parse("select NULL==1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[NULL]");
s = p.Parse("select +NULL==0");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select +NULL==0+NULL");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[NULL]");
s = p.Parse("select 33+1==32+2");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 4*4==2*8");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select pi==3.131492");
c.Enter();
c.Put<Element>("pi", new Element(3.131492));
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select pi==3.1314926");
c.Enter();
c.Put<Element>("pi", new Element(3.131492));
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select -pi==-3.131492");
c.Enter();
c.Put<Element>("pi", new Element(3.131492));
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select pi-pi=0");
c.Enter();
c.Put<Element>("pi", new Element(3.131492));
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 3.13149265+1 == pi+1)");
c.Enter();
c.Put<Element>("pi", new Element(3.131492));
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
}
public void BitwiseAndOperator()
{
EvalStore c = new EvalStore();
Parser p = new Parser();
Expression s;
Expression r;
//basic cases
s = p.Parse("select 0 & 0");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select 0 & 1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select 1 & 0");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select 1 & 1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 1 & NULL");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[NULL]");
s = p.Parse("select NULL & 1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[NULL]");
s = p.Parse("select 0 & NULL");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[NULL]");
s = p.Parse("select NULL & 0");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[NULL]");
s = p.Parse("select NULL & NULL");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[NULL]");
}
public void BitwiseXorOperator()
{
EvalStore c = new EvalStore();
Parser p = new Parser();
Expression s;
Expression r;
s = p.Parse("select 0 ^ 0");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select 0 ^ 1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 1 ^ 0");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 1 ^ 1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select 1 ^ NULL");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[NULL]");
s = p.Parse("select NULL ^ 1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[NULL]");
s = p.Parse("select 0 ^ NULL");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[NULL]");
s = p.Parse("select NULL ^ 0");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[NULL]");
s = p.Parse("select NULL ^ NULL");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[NULL]");
}
//static MemoryStream CreateStringStream(string value)
//{
// byte[] bytes = System.Text.Encoding.UTF8.GetBytes(value);
// MemoryStream ms = new MemoryStream();
// ms.Write(bytes, 0, bytes.Length);
// ms.Seek(0, SeekOrigin.Begin);
// return ms;
//}
//static void TestParser()
//{
// Console.WriteLine("Enter statements followed by a ; and enter 'bye' to exit:");
// while (true) {
// StringBuilder sb = new StringBuilder();
// while (true) {
// string line = Console.ReadLine();
// if (line.ToUpper() == "BYE") return;
// if (line == ";") break;
// if (line.EndsWith(";")) {
// sb.AppendLine(line.Substring(0, line.Length - 1));
// break;
// }
// sb.AppendLine(line);
// }
// using (MemoryStream ms = CreateStringStream(sb.ToString())) {
// Parser p = new Parser();
// //Expression e = p.GetExpression();
// }
// }
//}
//static string indent(int level)
//{
// string x = "";
// for (int i = 0; i < level; i++) {
// x = x + " ";
// }
// return x;
//}
static void TestParser()
{
Parser p = new Parser();
EvalStore c = new EvalStore();
StringBuilder cmd = new StringBuilder();
Stopwatch watch = Stopwatch.StartNew();
ContextTable contexts = new ContextTable();
contexts.Load();
AttributeTable attributes = new AttributeTable();
attributes.Load();
FactTable fact = new FactTable();
fact.Load();
watch.Stop();
Trace.WriteLine("LoadStaticData : " + watch.ElapsedMilliseconds + "ms");
try {
c.Enter();
c.Put<Element>("pi", new Element(3.131492653586));
c.Put<Element>("e", new Element(2.71828183));
c.Put<Table>(fact.Name, fact);
c.Put<Table>(attributes.Name, attributes);
c.Put<Table>(contexts.Name, contexts);
while (true) {
while (true) {
string v = Console.ReadLine();
v = v.Trim();
if (v.StartsWith(".")) {
v = v.ToUpper();
switch (v) {
case ".EXIT":
return;
}
}
if (v.EndsWith(";")) {
v = v.Substring(0, v.Length - 1);
cmd.AppendLine(v);
break;
}
cmd.AppendLine(v);
}
string query = cmd.ToString();
cmd.Clear();
Expression s = null;
try {
s = p.Parse(query);
}
catch (Exception ex) {
Console.WriteLine("Invalid syntax: " + ex.Message);
}
Expression r = null;
try {
r = s.Evaluate(c);
Table t = (Table) r.Value;
List<string> data = t.Print();
for (int i = 0; i < data.Count; i++) {
Console.WriteLine(data[i]);
}
}
catch (Exception ex) {
Console.WriteLine("Error evaluating statement: " + ex.Message);
}
//Console.WriteLine(r);
}
}
finally {
c.Exit();
}
}
public void PlusOperator()
{
EvalStore c = new EvalStore();
Parser p = new Parser();
Expression s;
Expression r;
p = new Parser();
s = p.Parse("select 1+1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[2]");
s = p.Parse("select 1+(-1)");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select 1+!(!0)+1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[2]");
s = p.Parse("select pi+e");
c.Enter();
c.Put<Element>("pi", new Element(3.13141592653589793238462));
c.Put<Element>("e", new Element(2.718281828459045235360));
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[5.85987448204884]");
s = p.Parse("select +e");
c.Enter();
c.Put<Element>("pi", new Element(3.13141592653589793238462));
c.Put<Element>("e", new Element(2.718281828459045235360));
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[2.71828182845905]");
s = p.Parse("select 1+e*pi");
c.Enter();
c.Put<Element>("pi", new Element(3.13141592653589793238462));
c.Put<Element>("e", new Element(2.718281828459045235360));
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[9.53973422267357]");
s = p.Parse("select " + int.MaxValue + "+1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[2147483648]");
s = p.Parse("select -1*5+3*!0*2+99");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[100]");
s = p.Parse("select !(!(!0))*-1+99");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[98]");
s = p.Parse("select 'cat' + 'dog'");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[catdog]");
}
public void UnaryPlusOperator()
{
EvalStore c = new EvalStore();
Parser p = new Parser();
Expression s;
Expression r;
p = new Parser();
s = p.Parse("select +1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select +1+(-1)");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select +(+(+1))");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select +pi+e");
c.Enter();
c.Put<Element>("pi", new Element(3.13141592653589793238462));
c.Put<Element>("e", new Element(2.718281828459045235360));
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[5.85987448204884]");
s = p.Parse("select +e");
c.Enter();
c.Put<Element>("pi", new Element(3.13141592653589793238462));
c.Put<Element>("e", new Element(2.718281828459045235360));
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[2.71828182845905]");
s = p.Parse("select + '123'");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[123]");
s = p.Parse("select +d'01/01/2015'");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1420092000000]");
s = p.Parse("select +5d");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[432000000]");
try {
s = p.Parse("select 100+5d");
c.Enter();
r = s.Evaluate(c);
Assert.Fail("no error thrown for select 100+5d");
}
catch (Exception ex) {
Assert.AreEqual(ex.GetType(), typeof(InvalidOperationException));
Assert.AreEqual(ex.Message, "Error executing select: Unsupported operand types for +: 'LONG' and 'TIMESPAN'");
}
finally {
c.Exit();
}
s = p.Parse("select 100+(+5d)");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[432000100]");
s = p.Parse("select 100+(+NULL)");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[100]");
}
public void UnaryMinusOperator()
{
EvalStore c = new EvalStore();
Parser p = new Parser();
Expression s;
Expression r;
s = p.Parse("select -1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[-1]");
s = p.Parse("select -(-1)");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select !(!0)");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select -(-(-1))");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[-1]");
s = p.Parse("select -1*5+3*!0*2+99");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[100]");
s = p.Parse("select !(!(!0))*-1+99");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[98]");
}
public void BitwiseNegateOperator()
{
EvalStore c = new EvalStore();
Parser p = new Parser();
Expression s;
Expression r;
s = p.Parse("select ~0xFFFFFFFFFFFFFFFF");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select ~0x1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[-2]");
s = p.Parse("select ~NULL");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[NULL]");
s = p.Parse("select ~3.13149265");
c.Enter();
try {
r = s.Evaluate(c);
Assert.Fail("Exception not thrown for ~DOUBLE");
}
catch (Exception ex) {
Assert.AreEqual(ex.GetType(), typeof(InvalidOperationException));
Assert.AreEqual(ex.Message, "Error executing select: Unsupported operand types for ~: 'DOUBLE'");
}
c.Exit();
}
public void LogicalNotOperator()
{
EvalStore c = new EvalStore();
Parser p = new Parser();
Expression s;
Expression r;
s = p.Parse("select !1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select !0");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select !NULL");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[NULL]");
s = p.Parse("select !3.1314");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select 3*!0");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[3]");
//unary operator does not allow !!value, but this can be rewritten as !(!value)
//(see Unary Operators in Engineering a Compiler (Keith Cooper) Ch 3.6)
try {
s = p.Parse("select !!3.1314");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.Fail("error not thrown for select !!3.1314");
}
catch (Exception ex) {
Assert.AreEqual(ex.Message, "Stack empty.");
}
}
public void SimpleSelectFrom()
{
EvalStore c = new EvalStore();
Parser p = new Parser();
Expression e;
Expression r;
Stopwatch watch = Stopwatch.StartNew();
ContextTable contexts = new ContextTable();
contexts.Load();
AttributeTable attributes = new AttributeTable();
attributes.Load();
FactTable fact = new FactTable();
fact.Load();
watch.Stop();
Trace.WriteLine("LoadStaticData : " + watch.ElapsedMilliseconds + "ms");
StringBuilder q = new StringBuilder();
//q.AppendLine("SELECT Context, time, format('%2.2f', avg(value)), format('%2.2f', min(value)), format('%2.2f', max(value)), format('%2.2f', stdv(value)), count(value), HostName");
//q.AppendLine("FROM 277");
//q.AppendLine("WHERE time between now()-5d and now(), ResID=33, Context='C:' or Context='D:'");
//q.AppendLine("GROUP BY Context, time(24h)");
//q.AppendLine("ORDER by Context, time");
//q.AppendLine("LIMIT 30");
//q.AppendLine("FROM 'growth_rate_running_average' as V, 'growth_space' as V, 'journal_file_size' as V, 'journal_secondary_directory' as V");
q.AppendLine("SELECT HostName, AttrName, time, format('%2.2f',avg(value))");
q.AppendLine("FROM /^CPU/");
q.AppendLine("WHERE time BETWEEN now(-1d) AND now()");
q.AppendLine("GROUP BY HostName, AttrName, time(24h)");
q.AppendLine("HAVING avg(value)>30");
//q.AppendLine("ORDER BY HostName DESC, AttrName, time DESC");
//q.AppendLine("LIMIT 10 OFFSET 5");
//q.AppendLine("SELECT AttrID, time, min(value), max(value), mean(value), stdv(value)");
//q.AppendLine("FROM 79,80");
//q.AppendLine("WHERE time BETWEEN now(-7d) AND now(), ResID=15");
//q.AppendLine("GROUP BY AttrID, time(4h)");
//q.AppendLine("ORDER BY AttrID, time DESC");
//q.AppendLine("SELECT Context, time, AVG(value)");
//q.AppendLine("FROM \*\");
//q.AppendLine("WHERE time >= now()-5d and time < now(), ResID=23, AttrID=4125 | AttrID=123, hour(time) between '08' and '21' ");
//q.AppendLine("GROUP BY Context, time(1d)");
//q.AppendLine("SELECT Context, time, AVG(value)");
//q.AppendLine("FROM \^CPU\");
//q.AppendLine("WHERE time >= now()-5d and time < now(), ResID=23, AttrID=4125 | AttrID=123, hour(time) between '08' and '21' ");
//q.AppendLine("GROUP BY AttrID, Context, time(1d)");
//q.AppendLine("GROUP BY time(1d)");
// show peak avg group by day of the week for the past 30 day
// peak time range
// average on all Mondays, Tues, ..., of a month
// concepts day of week
// typical 9-noon monday cpu 50%
//q.AppendLine("SELECT time, AVG(value)");
//q.AppendLine("FROM 101");
//q.AppendLine("WHERE time >= now()-10d and time < now(), ResID=3");
//q.AppendLine("GROUP BY time(4h)");
//q.AppendLine("SELECT time, AVG(value)");
//q.AppendLine("FROM 365,359");
//q.AppendLine("WHERE time >= now()-10d and time < now(), ResID=3");
//q.AppendLine("GROUP BY HostName, time(1d)");
e = p.Parse(q.ToString());
c.Enter();
c.Put<Table>(fact.Name, fact);
c.Put<Table>(attributes.Name, attributes);
c.Put<Table>(contexts.Name, contexts);
//Dictionary<string, string> validFields = new Dictionary<string, string>();
//for (int i = 0; i < fact.Cols; i++) {
// validFields.Add(fact.Schema[i].Name, null);
//}
//validFields.Add("contextid", null);
//validFields.Add("time", null);
//validFields.Add("value", null);
//validFields.Add("severity", null);
//c.Add(SelectStatement.VALID_FIELDS_KEY, validFields);
r = e.Evaluate(c);
Table t = (Table) r.Value;
List<string> data = t.Print();
for (int i = 0; i < data.Count; i++) {
Trace.WriteLine(data[i]);
}
c.Exit();
}
public void LogicalOrOrOperator()
{
EvalStore c = new EvalStore();
Parser p = new Parser();
Expression s;
Expression r;
s = p.Parse("select 0 || 0");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select 0 || 1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 1 || 0");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 1 || 1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 0 || NULL");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[NULL]");
s = p.Parse("select 1 || NULL");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select NULL || 0");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[NULL]");
s = p.Parse("select NULL || 1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select NULL || NULL");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[NULL]");
s = p.Parse("select 1 || 'hello'");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 'hello' || 1");
c.Enter();
try {
r = s.Evaluate(c);
Assert.Fail("Exception not thrown for select 'hello' OR 1");
}
catch (Exception ex) {
Assert.AreEqual(ex.GetType(), typeof(InvalidOperationException));
Assert.AreEqual(ex.Message, "Error executing select: Error converting 'hello' to Boolean");
}
c.Exit();
s = p.Parse("select 0 || 'hello'");
c.Enter();
try {
r = s.Evaluate(c);
Assert.Fail("Exception not thrown for 0 OR 'hello'");
}
catch (Exception ex) {
Assert.AreEqual(ex.GetType(), typeof(InvalidOperationException));
Assert.AreEqual(ex.Message, "Error executing select: Error converting 'hello' to Boolean");
}
c.Exit();
s = p.Parse("select 0 || 3d");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 3d || 1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 0 || 0d");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select 0d || 0");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select 1 || d'01/12/2015'");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select d'01/12/2015' || 1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
}
public void BitwiseShiftRightOperator()
{
EvalStore c = new EvalStore();
Parser p = new Parser();
Expression s;
Expression r;
s = p.Parse("select 0 >> 0");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select 0 >> 1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select 1 >> 0");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 1 >> 1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select 1 >> NULL");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[NULL]");
s = p.Parse("select NULL >> 1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[NULL]");
s = p.Parse("select 0 >> NULL");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[NULL]");
s = p.Parse("select NULL >> 0");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[NULL]");
s = p.Parse("select NULL >> NULL");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[NULL]");
}
public void RegexMatchOperator()
{
EvalStore c = new EvalStore();
Parser p = new Parser();
Expression s;
Expression r;
s = p.Parse("select 'a123' =~ /a[1..3]+/");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 'a11234' =~ pattern");
c.Enter();
c.Put<Element>("pattern", new Element("a[1..3]+"));
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select '1998' =~ 1900+98");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select '3.131492' =~ 3.131492");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
}
public void BetweenOperator()
{
EvalStore c = new EvalStore();
Parser p = new Parser();
Expression s;
Expression r;
s = p.Parse("select 1000 between 900 and 1001");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select ! (1000 between 900 and 1001)");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select not (1000 between 900 and 1001)");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
try {
s = p.Parse("select 1000 not between 900 and 1001");
c.Enter();
r = s.Evaluate(c);
Assert.Fail("Error not thrown: select 1000 not between 900 and 1001");
}
catch {
}
finally {
c.Exit();
}
s = p.Parse("select (1000 between '-900' and '1001')");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select d'12/12/2014' between d'1/12/2013' and d'1/1/2016')");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 3d between 1d and 5d");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 3d between +1d and +5d");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 3d between 86400000*3 and 86400000*3");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
}
public void LessThanOperator()
{
EvalStore c = new EvalStore();
Parser p = new Parser();
Expression s;
Expression r;
s = p.Parse("select 1<1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select 0<1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 0!<1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select 0!>1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 10!>10");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 10!<10");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 0.5<\"1\"");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 0.000009<'.000009001'");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select d'01/01/2015'<d'02/01/2015'");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 30d<30m");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select 100<'1000' AND 2<>1.99999999");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 1<3 AND 2<3 AND 10000000<10000001");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 1<NULL");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[NULL]");
s = p.Parse("select NULL<1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[NULL]");
s = p.Parse("select +NULL<1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 19<=19");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 0<=1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 4*4<=2*2.00000*2*2.0");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select pi<3.131492");
c.Enter();
c.Put<Element>("pi", new Element(3.131492));
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select pi<3.1314926");
c.Enter();
c.Put<Element>("pi", new Element(3.131492));
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select -pi<pi");
c.Enter();
c.Put<Element>("pi", new Element(3.131492));
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select pi-pi<=0");
c.Enter();
c.Put<Element>("pi", new Element(3.131492));
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
}
public void NotEqualOperator()
{
EvalStore c = new EvalStore();
Parser p = new Parser();
Expression s;
Expression r;
s = p.Parse("select 1!=1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select 1<>1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select 1!=\"1\"");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select 1<>'2'");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 3.131492<>3.131492");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select 1.112!=1.11111 OR 1.2223==1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 333<>'1' AND 2<>1.99999999");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select 1!=3 AND 2!=3 AND 3!=3");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select 1!=NULL");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[NULL]");
s = p.Parse("select NULL<>1");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[NULL]");
s = p.Parse("select +NULL!=0");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select +NULL!=0+NULL");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[NULL]");
s = p.Parse("select 33+1!=32+2");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select 4*4==2*8.00000");
c.Enter();
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select pi!=3.131492");
c.Enter();
c.Put<Element>("pi", new Element(3.131492));
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select pi!=3.1314926");
c.Enter();
c.Put<Element>("pi", new Element(3.131492));
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[1]");
s = p.Parse("select -pi!=-3.131492");
c.Enter();
c.Put<Element>("pi", new Element(3.131492));
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
s = p.Parse("select pi-pi<>0");
c.Enter();
c.Put<Element>("pi", new Element(3.131492));
r = s.Evaluate(c);
c.Exit();
Assert.AreEqual(r.ToString(), "[0]");
}