예제 #1
0
 internal virtual SqlExpression VisitVariable(SqlVariable v)
 {
     return(v);
 }
 internal override SqlExpression VisitVariable(SqlVariable v)
 {
     return(v);
 }
예제 #3
0
        internal static bool AreEqual(SqlNode node1, SqlNode node2)
        {
            if (node1 == node2)
            {
                return(true);
            }
            if (node1 == null || node2 == null)
            {
                return(false);
            }

            if (node1.NodeType == SqlNodeType.SimpleCase)
            {
                node1 = UnwrapTrivialCaseExpression((SqlSimpleCase)node1);
            }

            if (node2.NodeType == SqlNodeType.SimpleCase)
            {
                node2 = UnwrapTrivialCaseExpression((SqlSimpleCase)node2);
            }

            if (node1.NodeType != node2.NodeType)
            {
                // allow expression sets to compare against single expressions
                if (node1.NodeType == SqlNodeType.ExprSet)
                {
                    SqlExprSet eset = (SqlExprSet)node1;
                    for (int i = 0, n = eset.Expressions.Count; i < n; i++)
                    {
                        if (AreEqual(eset.Expressions[i], node2))
                        {
                            return(true);
                        }
                    }
                }
                else if (node2.NodeType == SqlNodeType.ExprSet)
                {
                    SqlExprSet eset = (SqlExprSet)node2;
                    for (int i = 0, n = eset.Expressions.Count; i < n; i++)
                    {
                        if (AreEqual(node1, eset.Expressions[i]))
                        {
                            return(true);
                        }
                    }
                }
                return(false);
            }
            if (node1.Equals(node2))
            {
                return(true);
            }

            switch (node1.NodeType)
            {
            case SqlNodeType.Not:
            case SqlNodeType.Not2V:
            case SqlNodeType.Negate:
            case SqlNodeType.BitNot:
            case SqlNodeType.IsNull:
            case SqlNodeType.IsNotNull:
            case SqlNodeType.Count:
            case SqlNodeType.Max:
            case SqlNodeType.Min:
            case SqlNodeType.Sum:
            case SqlNodeType.Avg:
            case SqlNodeType.Stddev:
            case SqlNodeType.ValueOf:
            case SqlNodeType.OuterJoinedValue:
            case SqlNodeType.ClrLength:
                return(AreEqual(((SqlUnary)node1).Operand, ((SqlUnary)node2).Operand));

            case SqlNodeType.Add:
            case SqlNodeType.Sub:
            case SqlNodeType.Mul:
            case SqlNodeType.Div:
            case SqlNodeType.Mod:
            case SqlNodeType.BitAnd:
            case SqlNodeType.BitOr:
            case SqlNodeType.BitXor:
            case SqlNodeType.And:
            case SqlNodeType.Or:
            case SqlNodeType.GE:
            case SqlNodeType.GT:
            case SqlNodeType.LE:
            case SqlNodeType.LT:
            case SqlNodeType.EQ:
            case SqlNodeType.NE:
            case SqlNodeType.EQ2V:
            case SqlNodeType.NE2V:
            case SqlNodeType.Concat:
                SqlBinary firstNode  = (SqlBinary)node1;
                SqlBinary secondNode = (SqlBinary)node2;
                return(AreEqual(firstNode.Left, secondNode.Left) &&
                       AreEqual(firstNode.Right, secondNode.Right));

            case SqlNodeType.Convert:
            case SqlNodeType.Treat: {
                SqlUnary sun1 = (SqlUnary)node1;
                SqlUnary sun2 = (SqlUnary)node2;
                return(sun1.ClrType == sun2.ClrType && sun1.SqlType == sun2.SqlType && AreEqual(sun1.Operand, sun2.Operand));
            }

            case SqlNodeType.Between: {
                SqlBetween b1 = (SqlBetween)node1;
                SqlBetween b2 = (SqlBetween)node1;
                return(AreEqual(b1.Expression, b2.Expression) &&
                       AreEqual(b1.Start, b2.Start) &&
                       AreEqual(b1.End, b2.End));
            }

            case SqlNodeType.Parameter:
                return(node1 == node2);

            case SqlNodeType.Alias:
                return(AreEqual(((SqlAlias)node1).Node, ((SqlAlias)node2).Node));

            case SqlNodeType.AliasRef:
                return(AreEqual(((SqlAliasRef)node1).Alias, ((SqlAliasRef)node2).Alias));

            case SqlNodeType.Column:
                SqlColumn col1 = (SqlColumn)node1;
                SqlColumn col2 = (SqlColumn)node2;
                return(col1 == col2 || (col1.Expression != null && col2.Expression != null && AreEqual(col1.Expression, col2.Expression)));

            case SqlNodeType.Table:
                return(((SqlTable)node1).MetaTable == ((SqlTable)node2).MetaTable);

            case SqlNodeType.Member:
                return((((SqlMember)node1).Member == ((SqlMember)node2).Member) &&
                       AreEqual(((SqlMember)node1).Expression, ((SqlMember)node2).Expression));

            case SqlNodeType.ColumnRef:
                SqlColumnRef cref1 = (SqlColumnRef)node1;
                SqlColumnRef cref2 = (SqlColumnRef)node2;
                return(GetBaseColumn(cref1) == GetBaseColumn(cref2));

            case SqlNodeType.Value:
                return(Object.Equals(((SqlValue)node1).Value, ((SqlValue)node2).Value));

            case SqlNodeType.TypeCase: {
                SqlTypeCase c1 = (SqlTypeCase)node1;
                SqlTypeCase c2 = (SqlTypeCase)node2;
                if (!AreEqual(c1.Discriminator, c2.Discriminator))
                {
                    return(false);
                }
                if (c1.Whens.Count != c2.Whens.Count)
                {
                    return(false);
                }
                for (int i = 0, c = c1.Whens.Count; i < c; ++i)
                {
                    if (!AreEqual(c1.Whens[i].Match, c2.Whens[i].Match))
                    {
                        return(false);
                    }
                    if (!AreEqual(c1.Whens[i].TypeBinding, c2.Whens[i].TypeBinding))
                    {
                        return(false);
                    }
                }

                return(true);
            }

            case SqlNodeType.SearchedCase: {
                SqlSearchedCase c1 = (SqlSearchedCase)node1;
                SqlSearchedCase c2 = (SqlSearchedCase)node2;
                if (c1.Whens.Count != c2.Whens.Count)
                {
                    return(false);
                }
                for (int i = 0, n = c1.Whens.Count; i < n; i++)
                {
                    if (!AreEqual(c1.Whens[i].Match, c2.Whens[i].Match) ||
                        !AreEqual(c1.Whens[i].Value, c2.Whens[i].Value))
                    {
                        return(false);
                    }
                }
                return(AreEqual(c1.Else, c2.Else));
            }

            case SqlNodeType.ClientCase: {
                SqlClientCase c1 = (SqlClientCase)node1;
                SqlClientCase c2 = (SqlClientCase)node2;
                if (c1.Whens.Count != c2.Whens.Count)
                {
                    return(false);
                }
                for (int i = 0, n = c1.Whens.Count; i < n; i++)
                {
                    if (!AreEqual(c1.Whens[i].Match, c2.Whens[i].Match) ||
                        !AreEqual(c1.Whens[i].Value, c2.Whens[i].Value))
                    {
                        return(false);
                    }
                }
                return(true);
            }

            case SqlNodeType.DiscriminatedType: {
                SqlDiscriminatedType dt1 = (SqlDiscriminatedType)node1;
                SqlDiscriminatedType dt2 = (SqlDiscriminatedType)node2;
                return(AreEqual(dt1.Discriminator, dt2.Discriminator));
            }

            case SqlNodeType.SimpleCase: {
                SqlSimpleCase c1 = (SqlSimpleCase)node1;
                SqlSimpleCase c2 = (SqlSimpleCase)node2;
                if (c1.Whens.Count != c2.Whens.Count)
                {
                    return(false);
                }
                for (int i = 0, n = c1.Whens.Count; i < n; i++)
                {
                    if (!AreEqual(c1.Whens[i].Match, c2.Whens[i].Match) ||
                        !AreEqual(c1.Whens[i].Value, c2.Whens[i].Value))
                    {
                        return(false);
                    }
                }
                return(true);
            }

            case SqlNodeType.Like: {
                SqlLike like1 = (SqlLike)node1;
                SqlLike like2 = (SqlLike)node2;
                return(AreEqual(like1.Expression, like2.Expression) &&
                       AreEqual(like1.Pattern, like2.Pattern) &&
                       AreEqual(like1.Escape, like2.Escape));
            }

            case SqlNodeType.Variable: {
                SqlVariable v1 = (SqlVariable)node1;
                SqlVariable v2 = (SqlVariable)node2;
                return(v1.Name == v2.Name);
            }

            case SqlNodeType.FunctionCall: {
                SqlFunctionCall f1 = (SqlFunctionCall)node1;
                SqlFunctionCall f2 = (SqlFunctionCall)node2;
                if (f1.Name != f2.Name)
                {
                    return(false);
                }
                if (f1.Arguments.Count != f2.Arguments.Count)
                {
                    return(false);
                }
                for (int i = 0, n = f1.Arguments.Count; i < n; i++)
                {
                    if (!AreEqual(f1.Arguments[i], f2.Arguments[i]))
                    {
                        return(false);
                    }
                }
                return(true);
            }

            case SqlNodeType.Link: {
                SqlLink l1 = (SqlLink)node1;
                SqlLink l2 = (SqlLink)node2;
                if (!MetaPosition.AreSameMember(l1.Member.Member, l2.Member.Member))
                {
                    return(false);
                }
                if (!AreEqual(l1.Expansion, l2.Expansion))
                {
                    return(false);
                }
                if (l1.KeyExpressions.Count != l2.KeyExpressions.Count)
                {
                    return(false);
                }
                for (int i = 0, c = l1.KeyExpressions.Count; i < c; ++i)
                {
                    if (!AreEqual(l1.KeyExpressions[i], l2.KeyExpressions[i]))
                    {
                        return(false);
                    }
                }
                return(true);
            }

            case SqlNodeType.ExprSet:
                SqlExprSet es1 = (SqlExprSet)node1;
                SqlExprSet es2 = (SqlExprSet)node2;
                if (es1.Expressions.Count != es2.Expressions.Count)
                {
                    return(false);
                }
                for (int i = 0, n = es1.Expressions.Count; i < n; i++)
                {
                    if (!AreEqual(es1.Expressions[i], es2.Expressions[i]))
                    {
                        return(false);
                    }
                }
                return(true);

            case SqlNodeType.OptionalValue:
                SqlOptionalValue ov1 = (SqlOptionalValue)node1;
                SqlOptionalValue ov2 = (SqlOptionalValue)node2;
                return(AreEqual(ov1.Value, ov2.Value));

            case SqlNodeType.Row:
            case SqlNodeType.UserQuery:
            case SqlNodeType.StoredProcedureCall:
            case SqlNodeType.UserRow:
            case SqlNodeType.UserColumn:
            case SqlNodeType.Multiset:
            case SqlNodeType.ScalarSubSelect:
            case SqlNodeType.Element:
            case SqlNodeType.Exists:
            case SqlNodeType.Join:
            case SqlNodeType.Select:
            case SqlNodeType.New:
            case SqlNodeType.ClientQuery:
            case SqlNodeType.ClientArray:
            case SqlNodeType.Insert:
            case SqlNodeType.Update:
            case SqlNodeType.Delete:
            case SqlNodeType.MemberAssign:
            case SqlNodeType.Assign:
            case SqlNodeType.Block:
            case SqlNodeType.Union:
            case SqlNodeType.DoNotVisit:
            case SqlNodeType.MethodCall:
            case SqlNodeType.Nop:
            default:
                return(false);
            }
        }
예제 #4
0
 internal override SqlExpression VisitVariable(SqlVariable v) => v;