通过异常发现,下一个表达式是一个Quote类型的表达式。它对应的表达式类型是Unary(即一元表达式)。一元表达式中唯一有用的东西就是Operand,于是我们继续解析: caseExpressionType.Quote: UnaryExpression expUnary= expressionasUnaryExpression;if(expUnary !=null) { VisitExpression(enumerable, expUnary.Operand,refsql); ...
Unary and Binary Operators The two general classes of operators are: unary: A unary operator operates on only one operand. A unary operator typically appears with its operand in this format: Copy operator operand binary: A binary operator operates on two operands. A binary operator appears...
The unary minus operator negates the SqlDecimal parameter. Explicit Interface Implementations Expand table IXmlSerializable.GetSchema() This member supports the .NET Framework infrastructure and is not intended to be used directly from your code. IXmlSerializable.ReadXml(XmlReader) This member su...
binary, 3-1 comparison, 3-5 concatenation, 3-3 granting system privileges on, 7-524 logical, 3-11 precedence, 3-2 set, 3-12, 7-579 unary, 3-1 user-defined, 3-16 binding to a function, 7-340 creating, 7-340 dropping, 7-489 function providing implementation, 7...
UnaryExpression 类 UnaryExpressionType 枚举 UniqueConstraint 类 UniqueRowFilter 枚举 UnpivotedTableSource 类 UnqualifiedJoin 类 UnqualifiedJoinType 枚举 UpdateCall 类 UpdateForClause 类 UpdateMergeAction 类 UpdateStatement 类 UpdateStatisticsStatement 类 ...
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In previous releases, an untyped parameter marker for a unary minus operator has an assumed DOUBLE data type. InDB2 10, the assumed data type is DECFLOAT(34). Changes to handling of special values Infinity, sNaN, and NaN In previous releases, whenDB2returns a decimal floating-point ...
as threads available and expects each operator in a query plan to generate code for processing chunks of tuples. Unary operators can process tuples within a pipeline, whereas binary operators have to materialise at least the result of one incoming child node first before pipelined processing ...
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UnaryNode有一个子节点,常见的有Filter(过滤)、Project(投影)、Window(窗口)等 七、BinaryNode BinaryNode有两个子节点,常见的有Join(关联)、Except(差集)、Intersect(交集) 生成未解析逻辑计划(UnResolve LogicalPlan) 通过antlr4解析后得到的抽象语法树如下图所示: ...