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 override Expression Evaluate(EvalStore store)
{
Table data = store.Get<Table>("$DATA");
if (data == null || data.Rows == 0) return ConstExpr.Empty;
int limit;
int offset=0;
Expression e = _expr.Evaluate(store);
if (e.ExpressionType != Language.ExpressionType.CONST) throw new Exception("LIMIT number must be evaluated to an integer.");
Element l = (e as ConstExpr).Value;
if (l.DataType != ElementType.LONG) throw new Exception("LIMIT number must be evaluated to an integer.");
limit = l.ToInt32(null);
if (limit < 1) throw new Exception("LIMIT must be an positive integer greater than 1.");
Element o = null;
if (this.Offset != null) {
e = _expr.Evaluate(store);
if (e.ExpressionType != Language.ExpressionType.CONST) throw new Exception("OFFSET number must be evaluated to an integer.");
o = (e as ConstExpr).Value;
if (o.DataType != ElementType.LONG) throw new Exception("OFFSET number must be evaluated to an integer.");
offset = o.ToInt32(null);
if (offset < 0) throw new Exception("OFFSET must be an positive integer.");
}
int end = offset + limit;
if (end > data.Rows) end = data.Rows;
List<Element[]> rows = new List<Element[]>();
for (int i = offset; i < end; i++) {
rows.Add(data.Row(i));
}
Table r = new Table(data.Name, data.ColumnDefinitions, rows);
store.Put<Table>("$DATA", r);
return new ConstExpr(r);
}
public override Expression Evaluate(EvalStore store)
{
Table data = store.Get<Table>("$DATA");
List<List<int>> groups = store.Get<List<List<int>>>("$GROUPS");
if (groups == null || groups.Count == 0) return ConstExpr.Empty;
List<List<int>> newGroups = new List<List<int>>();
using (EvalScope scope = new EvalScope(store, new EvalContext(EvalContext.ContextType.HAVING))) {
if (!SelectClause.HasAggregate(_expr)) return ConstExpr.Empty;
foreach (var g in groups) {
store.Put<List<int>>("$GROUP", g);
ConstExpr c = (ConstExpr)_expr.Evaluate(store);
if ((bool)c.Value) {
newGroups.Add(g);
}
}
}
store.Put("$GROUPS", newGroups);
return ConstExpr.Empty;
}
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();
}
private string CreateContextFilter(EvalStore store, Dictionary<int, List<Expression>> exprGrp)
{
Dictionary<string, Table> sel = new Dictionary<string, Table>();
if (exprGrp[CONTEXT_FILTER].Count == 0) return null;
Expression expr = exprGrp[CONTEXT_FILTER][0];
Table contexts = store.Get<Table>("Contexts");
sel.Add("_", contexts);
using (EvalScope scope = new EvalScope(store, new EvalContext(EvalContext.ContextType.SEARCH))) {
store.Put<Dictionary<string, Table>>("$SEL_FACTS", sel);
Expression e = expr.Evaluate(store);
if (e.ExpressionType != Language.ExpressionType.CONST) {
throw new Exception("The expression should be evaluated to a value. " + e.ToString());
}
ConstExpr c = e as ConstExpr;
if (c.Value.DataType == ElementType.TABLE) {
Table s = c.Value.GetObject<Table>();
List<string> ctxIds = new List<string>();
int ctxIdCol = s.ColumnDefinitions.IndexOf("CntxID");
for (int i = 0; i < s.Rows; i++) {
ctxIds.Add((string)s[i, ctxIdCol]);
}
if (ctxIds.Count == 1) {
return "ContextID=" + ctxIds[0].ToString();
}
else if (ctxIds.Count > 0) {
return "ContextID in (" + string.Join(",", ctxIds.ToArray()) + ")";
}
return null;
}
else {
if (c.Value.DataType != ElementType.EMPTY) {
throw new Exception("The expression should be evaluated to a set of rows or an empty set. " + e.ToString());
}
}
}
return null;
}
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();
}
private void InitializeData(Object threadContext)
{
Stopwatch watch = Stopwatch.StartNew();
_parser = new Parser();
_store = new EvalStore();
StringBuilder cmd = new StringBuilder();
_attributes = new AttributeTable();
_attributes.Load();
statusStrip.Text = "Loading Attributes...";
_facts = new FactTable();
_facts.Load();
statusStrip.Text = "Loading Facts...";
_contexts = new ContextTable();
_contexts.Load();
statusStrip.Text = "Loading Contexts...";
_resources = new ResourceTable();
_resources.Load();
statusStrip.Text = "Loading Resources...";
watch.Stop();
_popupMenu = new AutocompleteMenu(queryCode);
_popupMenu.SearchPattern = @"[\w\.:=!<>]";
_popupMenu.AllowTabKey = true;
List<AutocompleteItem> items = new List<AutocompleteItem>();
for (int i = 0; i < _facts.ColumnDefinitions.Count; i++) {
items.Add(new AutocompleteItem(_facts.ColumnDefinitions[i].Name));
}
items.Add(new AutocompleteItem("select"));
items.Add(new AutocompleteItem("where"));
items.Add(new AutocompleteItem("order"));
items.Add(new AutocompleteItem("group"));
items.Add(new AutocompleteItem("by"));
items.Add(new AutocompleteItem("limit"));
items.Add(new AutocompleteItem("desc"));
items.Add(new AutocompleteItem("asc"));
items.Add(new AutocompleteItem("between"));
for (int i=0; i<_resources.Cols; i++) {
items.Add(new AutocompleteItem(_resources.ColumnDefinitions[i].Name));
}
items.Add(new AutocompleteItem("Context"));
items.Add(new AutocompleteItem("value"));
items.Add(new AutocompleteItem("time"));
foreach (string func in _parser.GetFunctionNames()) {
SnippetAutocompleteItem n = new SnippetAutocompleteItem(func + "(^)");
n.ToolTipText = n.Text;
n.ToolTipTitle = "";
items.Add(n);
}
_popupMenu.Items.SetAutocompleteItems(items);
queryCode.Language = FastColoredTextBoxNS.Language.SQL;
_store.Enter();
_store.Put<Element>("pi", new Element(3.131492653586));
_store.Put<Element>("e", new Element(2.71828183));
_store.Put<Table>(_facts.Name, _facts);
_store.Put<Table>(_attributes.Name, _attributes);
_store.Put<Table>(_contexts.Name, _contexts);
_store.Put<Table>(_resources.Name, _resources);
Trace.WriteLine("InitializeData : " + watch.ElapsedMilliseconds + "ms");
toolStrip1.Enabled = true;
statusStrip.Text = "OK";
}
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 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]");
}
//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 override Expression Evaluate(EvalStore store)
{
Table data = store.Get<Table>("$DATA");
if (data == null) return ConstExpr.Empty;
if (data.Rows == 0) return new ConstExpr(data);
List<Mapper> mappers = new List<Mapper>();
foreach (Expression expr in _exprs) {
switch (expr.ExpressionType) {
case Language.ExpressionType.ID: {
int col = data.ColumnDefinitions.IndexOf((expr as IdentifierExpr).Name);
Mapper m = new Mapper(col);
mappers.Add(m);
}
break;
case Language.ExpressionType.FUNCTION: {
FuncExpr f = expr as FuncExpr;
int col = data.ColumnDefinitions.IndexOf(f.Name.ToLower());
Expression c = f.Arguments[0].Evaluate(store);
TimeMapper m = new TimeMapper(col, c.Value);
mappers.Add(m);
}
break;
}
}
List<int> p = new List<int>();
for (int i = 0; i < data.Rows; i++) { p.Add(i); }
List<List<int>> groups = CreateGroups(data, p, mappers);
store.Put<List<List<int>>>("$GROUPS", groups);
if (_havingClause != null) {
_havingClause.Evaluate(store);
}
return new ConstExpr(data);
}
public override Expression Evaluate(EvalStore store)
{
try {
Stopwatch w;
store.Enter();
HashSet<string> refIds = FindReferencedIds();
store.Put<Element>("$NOW", new Element(DateTime.Now));
store.Put<EvalContext>("$EVALPHASE", new EvalContext());
store.Put<HashSet<string>>("$REFIDS", refIds);
//evaluate the from clause to find out a list of attributes to load
if (_fromClause != null) {
w = Stopwatch.StartNew();
_fromClause.Evaluate(store);
w.Stop();
Trace.WriteLine("select.from : " + w.ElapsedMilliseconds + "ms");
}
//evaluate the where clause to narrow down the target attributes and time range
if (_whereClause != null) {
if (_fromClause == null) {
throw new Exception("Syntax error: missing from clause");
}
w = Stopwatch.StartNew();
Expression c = _whereClause.Evaluate(store);
w.Stop();
Trace.WriteLine("select.where : " + w.ElapsedMilliseconds + "ms");
}
//create the master table that has all the referenced columns
w = Stopwatch.StartNew();
Table data = store.Get<Table>("$DATA");
Table facts = store.Get<Table>("Facts");
data = CreateMasterDataTable(data, facts, refIds);
store.Put<Table>("$DATA", data);
w.Stop();
Trace.WriteLine("select.CreateMasterDataTable : " + w.ElapsedMilliseconds + "ms");
if (_groupByClause != null) {
w = Stopwatch.StartNew();
_groupByClause.Evaluate(store);
w.Stop();
Trace.WriteLine("select.group_by : " + w.ElapsedMilliseconds + "ms");
}
Expression ret;
w = Stopwatch.StartNew();
ret = _selectClause.Evaluate(store);
w.Stop();
Trace.WriteLine("select.select : " + w.ElapsedMilliseconds + "ms");
if (_orderByClause != null) {
w = Stopwatch.StartNew();
ret = _orderByClause.Evaluate(store);
w.Stop();
Trace.WriteLine("select.order_by : " + w.ElapsedMilliseconds + "ms");
}
if (_limitClause != null) {
w = Stopwatch.StartNew();
ret =_limitClause.Evaluate(store);
w.Stop();
Trace.WriteLine("select.limit : " + w.ElapsedMilliseconds + "ms");
}
return ret;
}
catch (Exception ex) {
throw new InvalidOperationException("Error executing select: " + ex.Message, ex);
}
finally {
store.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 override Expression Evaluate(EvalStore store)
{
Stopwatch watch;
store.Remove("$DATA");
var facts = store.Get<Table>("Facts");
var fromList = store.Get<Dictionary<string, Table>>("$FROM_LIST");
if (fromList == null || fromList.Count == 0) {
return ConstExpr.Empty;
}
HashSet<string> refIds = store.Get<HashSet<string>>("$REFIDS");
var selFacts = SelectFactTableRows(fromList, facts);
for (int i = 0; i < _exprs.Count; i++) {
_exprs[i] = Reduce(store, _exprs[i]);
}
Dictionary<int, List<Expression>> exprGroups;
Dictionary<string, Expression> idExprMap;
NormalizeExpressions(selFacts, _exprs, out exprGroups, out idExprMap);
//find out the time range
if (exprGroups[TIME_FILTER].Count == 0) {
throw new Exception("Time range expression is not specified.");
}
DateTime min = DateTime.MaxValue;
DateTime max = DateTime.MinValue;
DateTime[] range = ExtraTimeRange(store, exprGroups[TIME_FILTER][0]);
if (range != null) {
if (range[0] < min) min = range[0];
if (range[1] > max) max = range[1];
}
else {
throw new Exception("Time range is not specified.");
}
//find a list of data log by applying filters of various properties from the fact table
Table sel = null;
using (EvalScope scope = new EvalScope(store, new EvalContext(EvalContext.ContextType.SEARCH))) {
if (exprGroups[ATTR_FILTER].Count == 0) {
sel = (Table) selFacts["_"];
}
else {
store.Put<Dictionary<string, Table>>("$SEL_FACTS", selFacts);
foreach (Expression expr in exprGroups[ATTR_FILTER]) {
Expression e = expr.Evaluate(store);
if (e.ExpressionType != Language.ExpressionType.CONST) {
throw new Exception("The expression should be evaluated to a value. " + e.ToString());
}
ConstExpr c = e as ConstExpr;
if (c.Value.DataType == ElementType.TABLE) {
Table s = c.Value.GetObject<Table>();
if (sel == null) sel = s;
else sel.IntersectWith(s);
}
else {
if (c.Value.DataType != ElementType.EMPTY) {
throw new Exception("The expression should be evaluated to a set of rows or an empty set. " + e.ToString());
}
}
}
}
}
if (sel == null || sel.Rows == 0) return ConstExpr.Empty;
//creating additional filters for the metric loading queries
string resFilter = CreateResourceFilters(sel);
string ctxFilter = CreateContextFilter(store, exprGroups);
string filters;
if (!string.IsNullOrEmpty(resFilter) && !string.IsNullOrEmpty(ctxFilter)) {
filters = (resFilter + " AND " + ctxFilter);
}
else if (string.IsNullOrEmpty(resFilter)) {
filters = ctxFilter;
}
else {
filters = resFilter;
}
MetricsDataLoader dataLoader = new MetricsDataLoader();
Table data = dataLoader.Load(sel, min, max, filters, refIds);
Trace.WriteLine("WhereClase.Evaluate.TotalRows: " + data.Rows);
//applies filters that involve result columns
watch = Stopwatch.StartNew();
if (exprGroups[OTHER_FILTER].Count > 0) {
using (EvalScope scope = new EvalScope(store, new EvalContext(EvalContext.ContextType.FILTER))) {
store.Put<Table>("$DATA", data);
HashSet<int> selRows = new HashSet<int>();
for (int i = 0; i < data.Rows; i++) {
store.Put<Element[]>("$ROW", data.Row(i));
bool include = true;
foreach (Expression expr in exprGroups[OTHER_FILTER]) {
ConstExpr c = expr.Evaluate(store) as ConstExpr;
if (!((bool)c.Value)) {
include = false;
break;
}
}
if (include) {
selRows.Add(i);
}
}
data = data.Select(selRows);
}
}
if (data == null) data = new Table();
watch.Stop();
Trace.WriteLine("WhereClase.Evaluate.Filter: " + watch.ElapsedMilliseconds + "ms");
Trace.WriteLine("WhereClase.Evaluate.SelectedRows: " + data.Rows);
store.Put<Table>("$DATA", data);
return new ConstExpr(data);
}
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]");
}
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 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]");
}