The return value can either be a scalar (single) value or a table. Use this statement to create a reusable routine that can be used in these ways: In Transact-SQL statements such as SELECT In applications that call the function In the definition of another user-defined function To ...
externalResult$8 = (java.util.Map) function_com$sht$bigdata$rt$udf$scalar$SplitQueryParamsAsMap$5cccfdc891a58463898db753288ed577 .eval(isNull$0 ? null : ((java.lang.String) converter$7.toExternal((org.apache.flink.table.data.binary.BinaryStringData) field$2))); isNull$10 = externalRes...
2. 标量函数（Scalar Functions）用户定义的标量函数，可以将0、1或多个标量值，映射到新的标量值。为了定义标量函数，必须在org.apache.flink.table.functions中扩展基类Scalar Function，并实现（一个或多个）求值（evaluation，eval）方法。标量函数的行为由求值方法决定，求值方法必须公开声明并命名为eval（直接public...
SqlScalarFunctionCallExpression SqlUserDefinedScalarFunctionCallExpression Properties 展开表 Arguments (Inherited from SqlScalarFunctionCallExpression) BoundFunction BoundObject (Inherited from SqlScalarExpression) BoundScalar (Inherited from Sq...
[System.Serializable] public class FunctionCall : Microsoft.SqlServer.TransactSql.ScriptDom.PrimaryExpression继承 Object TSqlFragment ScalarExpression PrimaryExpression FunctionCall 属性 SerializableAttribute 构造函数 展开表 FunctionCall() 表示函数调用。字段...
This CREATE FUNCTION (SQL scalar) statement creates an SQL function at the current server. The function returns a single result. Invocation This statement can be embedded in an application program or issued interactively. It is an executable statement that can be dynamically prepared. ...
The following values of the InfoType argument return a list of the SQL data types to which the data source can convert the specified SQL data type with the CONVERT scalar function: SQL_CONVERT_BIGINT SQL_CONVERT_BINARY SQL_CONVERT_BIT SQL_CONVERT_CHAR SQL_CONVERT_DATE SQL_CONVERT_DECIMAL SQL...
在SQL 中,函数主要分为两种类型:标量函数(scalar function)和聚合函数(aggregate function)。标量函数针对每一行 输入参数,返回一行输出结果。例如,ABS 函数可以计算绝对值。聚合函数针对一组数据进行操作,并且返回一个汇总结 果。例如,AVG 函数可以计算一组数据的平均值。 22. 如何知道每个员工的邮箱长度? 答案: SE...
The CREATE FUNCTION (SQL scalar, table, or row) statement is used to define a user-defined SQL scalar, table, or row function. A scalar function returns a single value each time it is invoked, and is generally valid wherever an SQL expression is valid. A table function can be used in...
--CLR Scalar Function Syntax CREATE FUNCTION [ schema_name. ] function_name ( { @parameter_name [AS] [ type_schema_name. ] parameter_data_type [ = default ] } [ ,...n ] ) RETURNS { return_data_type } [ WITH <clr_function_option> [ ,...n ] ] ...