internal static HashSet <SqlAlias> Gather(SqlNode node)
{
ConsumedAliaseGatherer g = new ConsumedAliaseGatherer();
g.Visit(node);
return(g.Consumed);
}
/// <summary>
/// Gets the annotations for the given node. Null if none.
/// </summary>
internal List <SqlNodeAnnotation> Get(SqlNode node)
{
List <SqlNodeAnnotation> list = null;
this.annotationMap.TryGetValue(node, out list);
return(list);
}
internal static SqlNode Lift(SqlNode node)
{
ColumnLifter cl = new ColumnLifter();
node = cl.Visit(node);
return(node);
}
private SqlNode ParseDelete()
{
if (tokenizer.IsEof)
{
throw ReportError("Unexpected EOF");
}
var token = tokenizer.Peek();
if (!token.IsKeyword("FROM"))
{
throw ReportError("Expecting FROM keyword. Got " + token.ToString());
}
tokenizer.Next();
SqlNode nameToRemove = ParseIdendifier();
SqlNode condition = null;
if (IsKeyword("WHERE"))
{
tokenizer.Next();
condition = ParseExpression();
}
SkipPunctuation(";");
return(new DeleteNode(nameToRemove, condition));
}
private void GatherUnionExpressions(SqlNode node, List <SqlExpression> exprs)
{
SqlUnion union = node as SqlUnion;
if (union != null)
{
this.GatherUnionExpressions(union.Left, exprs);
this.GatherUnionExpressions(union.Right, exprs);
}
else
{
SqlSelect sel = node as SqlSelect;
if (sel != null)
{
SqlAliasRef aref = sel.Selection as SqlAliasRef;
if (aref != null)
{
this.GatherUnionExpressions(aref.Alias.Node, exprs);
}
else
{
exprs.Add(sel.Selection);
}
}
}
}
internal override SqlExpression VisitAliasRef(SqlAliasRef aref)
{
SqlNode node = aref.Alias.Node;
if (node is SqlTable || node is SqlTableValuedFunctionCall)
{
return(aref);
}
SqlUnion union = node as SqlUnion;
if (union != null)
{
return(this.ExpandUnion(union));
}
SqlSelect ss = node as SqlSelect;
if (ss != null)
{
return(this.VisitExpression(ss.Selection));
}
SqlExpression exp = node as SqlExpression;
if (exp != null)
{
return(this.VisitExpression(exp));
}
throw Error.CouldNotHandleAliasRef(node.NodeType);
}
internal static HashSet <SqlAlias> Gather(SqlNode node)
{
ProducedAliasGatherer g = new ProducedAliasGatherer();
g.Visit(node);
return(g.Produced);
}
public TreeNode[] GetSubObjectHierarchy(TreeNode node)
{
mk.Logic.simpleDebug.dump();
// Show the column breakdown for the selected table
// return null;
if (node is SqlNode)
{
SqlNode on = (SqlNode)node;
if (on.type == "T" || on.type == "V")
{
DataSet ds = dbClient.Execute("PRAGMA table_info(" + on.Text + ");", timeout);
if (ds == null || ds.Tables.Count == 0)
{
return(null);
}
TreeNode[] tn = new SqlNode[ds.Tables[0].Rows.Count];
int count = 0;
foreach (DataRow row in ds.Tables[0].Rows)
{
string nullable = row["notnull"].ToString().StartsWith("0") ? "" : "not null";
SqlNode column = new SqlNode(row["name"].ToString() + " ("
+ row["type"].ToString() + ", " + nullable + ")");
column.dragText = row["name"].ToString();
tn[count++] = column;
}
return(tn);
}
}
return(null);
}
private static ProviderType GetSqlType(SqlNode node)
{
var exp = node as SqlExpression;
if (exp != null)
{
return(exp.SqlType);
}
var sel = node as SqlSelect;
if (sel != null)
{
return(sel.Selection.SqlType);
}
var tab = node as SqlTable;
if (tab != null)
{
return(tab.SqlRowType);
}
var su = node as SqlUnion;
if (su != null)
{
return(su.GetSqlType());
}
throw Error.UnexpectedNode(node.NodeType);
}
internal virtual void VisitWithParens(SqlNode node, SqlNode outer) {
if (node == null)
return;
switch (node.NodeType) {
case SqlNodeType.ColumnRef:
case SqlNodeType.Value:
case SqlNodeType.Member:
case SqlNodeType.Parameter:
case SqlNodeType.FunctionCall:
case SqlNodeType.TableValuedFunctionCall:
case SqlNodeType.OuterJoinedValue:
this.Visit(node);
break;
case SqlNodeType.Add:
case SqlNodeType.Mul:
case SqlNodeType.And:
case SqlNodeType.Or:
case SqlNodeType.Not:
case SqlNodeType.Not2V:
case SqlNodeType.BitAnd:
case SqlNodeType.BitOr:
case SqlNodeType.BitXor:
case SqlNodeType.BitNot:
if (outer.NodeType != node.NodeType)
goto default;
this.Visit(node);
break;
default:
this.sb.Append("(");
this.Visit(node);
this.sb.Append(")");
break;
}
}
// Methods
internal override SqlNode Visit(SqlNode node)
{
if (node == null)
{
return(null);
}
if (this.isSimple)
{
switch (node.NodeType)
{
case SqlNodeType.Add:
case SqlNodeType.And:
case SqlNodeType.Between:
case SqlNodeType.BitAnd:
case SqlNodeType.BitNot:
case SqlNodeType.BitOr:
case SqlNodeType.BitXor:
case SqlNodeType.Cast:
case SqlNodeType.ClrLength:
case SqlNodeType.ColumnRef:
case SqlNodeType.Concat:
case SqlNodeType.Convert:
case SqlNodeType.Div:
case SqlNodeType.ExprSet:
case SqlNodeType.EQ:
case SqlNodeType.EQ2V:
case SqlNodeType.FunctionCall:
case SqlNodeType.IsNotNull:
case SqlNodeType.IsNull:
case SqlNodeType.LE:
case SqlNodeType.Like:
case SqlNodeType.LT:
case SqlNodeType.GE:
case SqlNodeType.GT:
case SqlNodeType.Member:
case SqlNodeType.Mod:
case SqlNodeType.Mul:
case SqlNodeType.NE:
case SqlNodeType.NE2V:
case SqlNodeType.Negate:
case SqlNodeType.Not:
case SqlNodeType.Not2V:
case SqlNodeType.Or:
case SqlNodeType.OptionalValue:
case SqlNodeType.OuterJoinedValue:
case SqlNodeType.Parameter:
case SqlNodeType.SearchedCase:
case SqlNodeType.SimpleCase:
case SqlNodeType.Sub:
case SqlNodeType.Treat:
case SqlNodeType.TypeCase:
case SqlNodeType.Variable:
case SqlNodeType.Value:
case SqlNodeType.ValueOf:
return(base.Visit(node));
}
this.isSimple = false;
}
return(node);
}
private List <SqlParameterInfo> ParameterizeInternal(SqlNode node)
{
SqlParameterInfoProducer v = new SqlParameterInfoProducer(this);
v.Visit(node);
return(new List <SqlParameterInfo>(v.CurrentParams));
}
internal SqlColumn BubbleUp(SqlColumn col, SqlNode source)
{
this.match = this.GetOriginatingColumn(col);
this.found = null;
this.Visit(source);
return(this.found);
}
/// <summary>
/// Execute each current validator.
/// </summary>
internal void Validate(SqlNode node)
{
foreach (SqlVisitor validator in this.validators)
{
validator.Visit(node);
}
}
private List <SqlParameterInfo> ParameterizeInternal(SqlNode node)
{
var visitor = new Visitor(this);
visitor.Visit(node);
return(new List <SqlParameterInfo>(visitor.currentParams));
}
internal static HashSet <SqlColumn> Gather(SqlNode node, HashSet <SqlColumn> columns)
{
Visitor v = new Visitor(columns);
v.Visit(node);
return(columns);
}
internal static bool IsDependent(SqlNode node, HashSet <SqlAlias> aliasesToCheck, HashSet <SqlExpression> ignoreExpressions)
{
AliasDependencyChecker v = new AliasDependencyChecker(aliasesToCheck, ignoreExpressions);
v.Visit(node);
return(v.hasDependency);
}
internal override SqlNode Visit(SqlNode node) {
// Short-circuit when the answer is alreading known
if (this.referencesAnyMatchingAliases) {
return node;
}
return base.Visit(node);
}
internal override SqlNode Visit(SqlNode node)
{
SqlExpression expression = node as SqlExpression;
if (expression != null)
{
bool saveIsBlocked = this.isBlocked;
this.isBlocked = false;
if (CanRecurseColumnize(expression))
{
base.Visit(expression);
}
if (!this.isBlocked)
{
if (CanBeColumn(expression))
{
this.candidates.Add(expression);
}
else
{
this.isBlocked = true;
}
}
this.isBlocked |= saveIsBlocked;
}
return(node);
}
private void ProcessNode(Node node)
{
var sqlNode = new SqlNode
{
Id = node.Id,
TimeStamp = node.TimeStamp,
LocalChangeset = node.LocalChangeset,
Latitude = node.Latitude,
Longtitude = node.Longtitude,
};
sqlNode.MakePosition();
var command = new SqlCommand("Insert into Node (Id, TimeStamp, Latitude, Longtitude, Position) values (@Id, @TimeStamp, @Latitude, @Longtitude, @Position)")
{
Connection = _db
};
command.Parameters.Add(new SqlParameter("@Id", sqlNode.Id));
command.Parameters.Add(new SqlParameter("@TimeStamp", sqlNode.TimeStamp));
command.Parameters.Add(new SqlParameter("@LocalChangeset", sqlNode.LocalChangeset));
command.Parameters.Add(new SqlParameter("@Latitude", sqlNode.Latitude));
command.Parameters.Add(new SqlParameter("@Longtitude", sqlNode.Longtitude));
command.Parameters.Add(new SqlParameter("@Position", sqlNode.Position)
{
UdtTypeName = "Geography"
});
command.ExecuteNonQuery();
}
public void ProcessConstant(SqlNode constant, bool resolveIdent)
{
// If the constant is an IDENT, figure out what it means...
bool isIdent = (constant.Type == HqlSqlWalker.IDENT || constant.Type == HqlSqlWalker.WEIRD_IDENT);
if (resolveIdent && isIdent && IsAlias(constant.Text))
{
// IDENT is a class alias in the FROM.
IdentNode ident = (IdentNode)constant;
// Resolve to an identity column.
ident.Resolve(false, true);
}
else
{
// IDENT might be the name of a class.
IQueryable queryable = _walker.SessionFactoryHelper.FindQueryableUsingImports(constant.Text);
if (isIdent && queryable != null)
{
constant.Text = queryable.DiscriminatorSQLValue;
}
// Otherwise, it's a literal.
else
{
ProcessLiteral(constant);
}
}
}
internal override SqlNode Visit(SqlNode node) {
if (node == null)
return null;
sourceExpression = node as SqlExpression;
if (sourceExpression != null) {
Type type = sourceExpression.ClrType;
UnwrapStack unwrap = this.UnwrapSequences;
while (unwrap != null) {
if (unwrap.Unwrap) {
type = TypeSystem.GetElementType(type);
}
unwrap = unwrap.Last;
}
sourceType = type;
}
if (sourceType != null && TypeSystem.GetNonNullableType(sourceType).IsValueType) {
return node; // Value types can't also have a dynamic type.
}
if (sourceType != null && TypeSystem.HasIEnumerable(sourceType)) {
return node; // Sequences can't be polymorphic.
}
switch (node.NodeType) {
case SqlNodeType.ScalarSubSelect:
case SqlNodeType.Multiset:
case SqlNodeType.Element:
case SqlNodeType.SearchedCase:
case SqlNodeType.ClientCase:
case SqlNodeType.SimpleCase:
case SqlNodeType.Member:
case SqlNodeType.DiscriminatedType:
case SqlNodeType.New:
case SqlNodeType.FunctionCall:
case SqlNodeType.MethodCall:
case SqlNodeType.Convert: // Object identity does not survive convert. It does survive Cast.
// Dig no further.
return node;
case SqlNodeType.TypeCase:
sourceType = ((SqlTypeCase)node).RowType.Type;
return node;
case SqlNodeType.Link:
sourceType = ((SqlLink)node).RowType.Type;
return node;
case SqlNodeType.Table:
sourceType = ((SqlTable)node).RowType.Type;
return node;
case SqlNodeType.Value:
SqlValue val = (SqlValue)node;
if (val.Value != null) {
// In some cases the ClrType of a Value node may
// differ from the actual runtime type of the value.
// Therefore, we ensure here that the correct type is set.
sourceType = val.Value.GetType();
}
return node;
}
return base.Visit(node);
}
SqlNode VisitJoinRight(SqlNode join)
{
this.sb.Append("(");
var result = base.Visit(join);
this.sb.Append(")");
return(result);
}
internal QueryInfo(SqlNode query, string commandText, ReadOnlyCollection <SqlParameterInfo> parameters, ResultShape resultShape, Type resultType)
{
this.query = query;
this.commandText = commandText;
this.parameters = parameters;
this.resultShape = resultShape;
this.resultType = resultType;
}
internal SqlNode Deflate(SqlNode node) {
node = this.vDeflator.Visit(node);
node = this.cDeflator.Visit(node);
node = this.aDeflator.Visit(node);
node = this.tsDeflator.Visit(node);
node = this.dupColumnDeflator.Visit(node);
return node;
}
/// <summary>
/// Whether the given node has annotations.
/// </summary>
internal bool NodeIsAnnotated(SqlNode node)
{
if (node == null)
{
return(false);
}
return(this.annotationMap.ContainsKey(node));
}
internal SqlNode Prebind(SqlNode node)
{
if (this.prebinder != null)
{
node = this.prebinder(node);
}
return(node);
}
/// <summary>
/// Returns true iff the given node references any aliases the list of 'aliases'.
/// </summary>
internal static bool ReferencesAny(SqlNode node, IEnumerable <SqlAlias> aliases)
{
Visitor visitor = new Visitor();
visitor.aliases = aliases;
visitor.Visit(node);
return(visitor.referencesAnyMatchingAliases);
}
public virtual void Visit(SqlNode sqlNode)
{
if (sqlNode == null)
{
return;
}
sqlNode.Accept(this);
}
internal static SqlNode Reduce(SqlNode node, SqlNodeAnnotations annotations, Enum[] providerModesWithIncompatibilities)
{
Reducer r = new Reducer(providerModesWithIncompatibilities)
{
Annotations = annotations
};
return(r.Visit(node));
}
// Methods
internal static MetaType GetSourceMetaType(SqlNode node, MetaModel model)
{
Visitor visitor = new Visitor();
visitor.Visit(node);
Type nonNullableType = TypeSystem.GetNonNullableType(visitor.sourceType);
return(model.GetMetaType(nonNullableType));
}
/// <summary>
/// start the enginges.
/// </summary>
/// <param name="node">the start node.</param>
/// <returns>think of</returns>
internal List <AnalyseResult> Run(SqlNode node)
{
if ((object)node == null)
{
return(null);
}
node.Accept(this);
return(this._AnalyseResults);
}
internal override SqlNode Visit(SqlNode node)
{
node = base.Visit(node);
if (node != null)
{
node.ClearSourceExpression();
}
return(node);
}
internal override SqlNode Visit(SqlNode node)
{
// Short-circuit when the answer is alreading known
if (this.referencesAnyMatchingAliases)
{
return(node);
}
return(base.Visit(node));
}
internal string Format(SqlNode node, bool isDebug) {
this.sb = new StringBuilder();
this.isDebugMode = isDebug;
this.aliasMap.Clear();
if (isDebug) {
new AliasMapper(this.aliasMap).Visit(node);
}
this.Visit(node);
return this.sb.ToString();
}
internal override SqlNode Visit(SqlNode node) {
if (annotations.NodeIsAnnotated(node)) {
foreach (SqlNodeAnnotation annotation in annotations.Get(node)) {
SqlServerCompatibilityAnnotation ssca = annotation as SqlServerCompatibilityAnnotation;
if (ssca != null && ssca.AppliesTo(provider)) {
reasons.Add(annotation.Message);
}
}
}
return base.Visit(node);
}
internal override SqlNode Visit(SqlNode node) {
if (node == null) {
return null;
}
SqlNode result = null;
if (this.nodeMap.TryGetValue(node, out result)) {
return result;
}
result = base.Visit(node);
this.nodeMap[node] = result;
return result;
}
/// <summary>
/// Add an annotation to the given node.
/// </summary>
internal void Add(SqlNode node, SqlNodeAnnotation annotation) {
List<SqlNodeAnnotation> list = null;
if (!this.annotationMap.TryGetValue(node, out list)) {
list = new List<SqlNodeAnnotation>();
this.annotationMap[node]=list;
}
uniqueTypes[annotation.GetType()] = String.Empty;
list.Add(annotation);
}
internal static SqlNode Copy(SqlNode node) {
if (node == null)
return null;
switch (node.NodeType) {
case SqlNodeType.ColumnRef:
case SqlNodeType.Value:
case SqlNodeType.Parameter:
case SqlNodeType.Variable:
return node;
default:
return new SqlDuplicator().Duplicate(node);
}
}
/// <summary>
/// Checks whether the given node is supported on the given server.
/// </summary>
internal static void ThrowIfUnsupported(SqlNode node, SqlNodeAnnotations annotations, SqlProvider.ProviderMode provider) {
// Check to see whether there's at least one SqlServerCompatibilityAnnotation.
if (annotations.HasAnnotationType(typeof(SqlServerCompatibilityAnnotation))) {
Visitor visitor = new Visitor(provider);
visitor.annotations = annotations;
visitor.Visit(node);
// If any messages were recorded, then throw an exception.
if (visitor.reasons.Count > 0) {
throw Error.ExpressionNotSupportedForSqlServerVersion(visitor.reasons);
}
}
}
internal static bool CanConvert(SqlNode node) {
SqlBinary bo = node as SqlBinary;
if (bo != null && (IsCompareToValue(bo) || IsVbCompareStringEqualsValue(bo))) {
return true;
}
SqlMember sm = node as SqlMember;
if (sm != null && IsSupportedMember(sm)) {
return true;
}
SqlMethodCall mc = node as SqlMethodCall;
if (mc != null && (IsSupportedMethod(mc) || IsSupportedVbHelperMethod(mc))) {
return true;
}
return false;
}
internal override SqlNode Visit(SqlNode node) {
SqlExpression expr = node as SqlExpression;
if (expr != null) {
if (this.candidates.Contains(expr)) {
if (expr.NodeType == SqlNodeType.Column ||
expr.NodeType == SqlNodeType.ColumnRef) {
return expr;
}
else {
return new SqlColumn(expr.ClrType, expr.SqlType, null, null, expr, expr.SourceExpression);
}
}
}
return base.Visit(node);
}
internal static bool CanConvert(SqlNode node) {
SqlUnary su = node as SqlUnary;
if (su != null && IsSupportedUnary(su)) {
return true;
}
SqlNew sn = node as SqlNew;
if (sn != null && IsSupportedNew(sn)) {
return true;
}
SqlMember sm = node as SqlMember;
if (sm != null && IsSupportedMember(sm)) {
return true;
}
SqlMethodCall mc = node as SqlMethodCall;
if (mc != null && (GetMethodSupport(mc) == MethodSupport.Method)) {
return true;
}
return false;
}
internal override SqlNode Visit(SqlNode node) {
SqlExpression expression = node as SqlExpression;
if (expression != null) {
bool saveIsBlocked = this.isBlocked;
this.isBlocked = false;
if (CanRecurseColumnize(expression)) {
base.Visit(expression);
}
if (!this.isBlocked) {
if (CanBeColumn(expression)) {
this.candidates.Add(expression);
}
else {
this.isBlocked = true;
}
}
this.isBlocked |= saveIsBlocked;
}
return node;
}
internal override string Format(SqlNode node) {
return this.visitor.Format(node);
}
private GroupInfo FindGroupInfo(SqlNode source) {
GroupInfo info = null;
this.gmap.TryGetValue(source, out info);
if (info != null) {
return info;
}
SqlAlias alias = source as SqlAlias;
if (alias != null) {
SqlSelect select = alias.Node as SqlSelect;
if (select != null) {
return this.FindGroupInfo(select.Selection);
}
// it might be an expression (not yet fully resolved)
source = alias.Node;
}
SqlExpression expr = source as SqlExpression;
if (expr != null) {
switch (expr.NodeType) {
case SqlNodeType.AliasRef:
return this.FindGroupInfo(((SqlAliasRef)expr).Alias);
case SqlNodeType.Member:
return this.FindGroupInfo(((SqlMember)expr).Expression);
default:
this.gmap.TryGetValue(expr, out info);
return info;
}
}
return null;
}
internal override string Format(SqlNode node, bool isDebug) {
return this.visitor.Format(node, isDebug);
}
private SqlSelect CoerceToSequence(SqlNode node) {
SqlSelect select = node as SqlSelect;
if (select == null) {
if (node.NodeType == SqlNodeType.Value) {
SqlValue sv = (SqlValue)node;
// Check for ITables.
ITable t = sv.Value as ITable;
if (t != null) {
return this.CoerceToSequence(this.TranslateConstantTable(t, null));
}
// Check for IQueryable.
IQueryable query = sv.Value as IQueryable;
if (query != null) {
Expression fex = Funcletizer.Funcletize(query.Expression);
// IQueryables that return self-referencing Constant expressions cause infinite recursion
if (fex.NodeType != ExpressionType.Constant ||
((ConstantExpression)fex).Value != query) {
return this.VisitSequence(fex);
}
throw Error.IQueryableCannotReturnSelfReferencingConstantExpression();
}
throw Error.CapturedValuesCannotBeSequences();
}
else if (node.NodeType == SqlNodeType.Multiset || node.NodeType == SqlNodeType.Element) {
return ((SqlSubSelect)node).Select;
}
else if (node.NodeType == SqlNodeType.ClientArray) {
throw Error.ConstructedArraysNotSupported();
}
else if (node.NodeType == SqlNodeType.ClientParameter) {
throw Error.ParametersCannotBeSequences();
}
// this needs to be a sequence expression!
SqlExpression sqlExpr = (SqlExpression)node;
SqlAlias sa = new SqlAlias(sqlExpr);
SqlAliasRef aref = new SqlAliasRef(sa);
return new SqlSelect(aref, sa, this.dominatingExpression);
}
return select;
}
internal override SqlNode Visit(SqlNode node) {
// recurse until we know we're invalid
if (this.IsValid && node != null) {
return base.Visit(node);
}
return node;
}
internal SqlNode Multiplex(SqlNode node) {
return this.visitor.Visit(node);
}
/// <summary>
/// Remove relative constants from OrderBy.
/// </summary>
internal static SqlNode Remove(SqlNode node) {
return new Visitor().Visit(node);
}
internal virtual void VisitCrossJoinList(SqlNode node) {
SqlJoin join = node as SqlJoin;
if (join != null) {
this.VisitCrossJoinList(join.Left);
sb.Append(", ");
this.VisitCrossJoinList(join.Right);
} else {
this.Visit(node);
}
}
internal SqlNode Duplicate(SqlNode node) {
return this.superDuper.Visit(node);
}
internal static SqlNode Simplify(SqlNode node, SqlFactory sql) {
return new Visitor(sql).Visit(node);
}
internal string Format(SqlNode node) {
return this.Format(node, false);
}
internal SqlNode Flatten(SqlNode node) {
node = this.visitor.Visit(node);
return node;
}
internal virtual bool IsSimpleCrossJoinList(SqlNode node) {
SqlJoin join = node as SqlJoin;
if (join != null) {
return join.JoinType == SqlJoinType.Cross &&
this.IsSimpleCrossJoinList(join.Left) &&
this.IsSimpleCrossJoinList(join.Right);
}
SqlAlias alias = node as SqlAlias;
return (alias != null && alias.Node is SqlTable);
}
internal static SqlNode Lift(SqlNode node) {
ColumnLifter cl = new ColumnLifter();
node = cl.Visit(node);
return node;
}
internal SqlNode Retype(SqlNode node) {
return this.visitor.Visit(node);
}
internal SqlNode Reorder(SqlNode node) {
return new Visitor(this.typeProvider, this.sql).Visit(node);
}
