REPLICATE (Azure Cosmos DB)REPLICATE (Azure Cosmos DB)
将一个字符串值重复指定的次数。Repeats a string value a specified number of times.
语法Syntax
REPLICATE(<str_expr>, <num_expr>)
参数Arguments
str_exprstr_expr
是一个字符串表达式。Is a string expression.
num_exprnum_expr
是一个数值表达式。Is a numeric expression. 如果 num_expr 为负或非有限，则结果未定义。If num_expr is negative or non-finite, the result is undefined.
返回类型Return types
返回一个字符串表达式。Returns a string expression.
备注Remarks
结果的最大长度为 10,000 个字符，即 (length(str_expr) * num_expr) <= 10,000。The maximum length of the result is 10,000 characters i.e. (length(str_expr) * num_expr) <= 10,000.
示例Examples
以下示例演示如何在查询中使用 REPLICATE。The following example shows how to use REPLICATE in a query.
SELECT REPLICATE("a", 3) AS replicate
下面是结果集。Here is the result set.
[{"replicate": "aaa"}]
备注Remarks
此系统函数不会使用索引。This system function will not utilize the index.