The most powerful new feature in XQuery is the FLWR expression.
XQuery中最强大的新特性是FLWR表达式。
Each FLWR expression has one or more for clause, one or more let clause, an optional where clause, and a return clause.
每个FLWR表达式都有一个或多个for子句、一个或多个let子句、一个可选的where子句以及一个return子句。
Query decomposition focused mainly on the FLWR expressions.
查询分解主要侧重于FLWR表达式。
According to the FLWR expression characteristics, the algorithm is divided into three parts: decomposing the LET and FOR clause, handling RETURN clause and WHERE condition.
根据FLWR表达式的特点，算法共分为三个部分：分解FOR和LET子句、处理RETURN子句和处理WHERE条件。
According to the FLWR expression characteristics, the algorithm is divided into three parts: decomposing the LET and FOR clause, handling RETURN clause and WHERE condition.
根据FLWR表达式的特点，算法共分为三个部分：分解FOR和LET子句、处理RETURN子句和处理WHERE条件。
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