来自:http://linqtolucene.codeplex.com/
uesday, 13 November 2007
This release provides a real focus on the querying abilities of the LINQ
to Lucene project and is the first real 'working release', converting LINQ statements to Lucene queries with
deferred query execution and object creation or projection. It culminates the majority of the required querying features for LINQ that Lucene provides natively.
| Lucene Syntax | LINQ to Lucene | |
|---|---|---|
| Terms & Phrases | "test" or "hello dolly" | c.Match("test") or c.Match("hello dolly") |
| Fields | title:"The Right way" andtext:go | c.Title == "The Right way" or c.Text == "go" |
| WildCard | amb?r | c.ContactName.Match("amb?r") |
| Prefix | amber* | c.ContactName.StartsWith("amber") |
| Fuzzy | roam~ or roam~0.8 | c.ContactName.Like("roam") orc.ContactName.Like("roam", 0.8) |
| Proximity | "jakarta apache"~10 | c.ContactName.Like("jakarta apache", 10) |
| Inclusive Range | mod_date:[20020101 TO 20030101] | c.ModifiedDate.Includes("20020101", "20030101") |
| Exclusive Range | title:{Aida TO Carmen} | c.Title.Between("Aida", "Carmen") |
| Boosting | jakarta^4 apache | c.Title.Match("jakarta".Boost(4), apache) |
| Boolean Or | "jakarta apache" OR jakarta | where c.Match("jakarta apache") || c.Match("jakarta") |
| Boolean And | "jakarta apache" AND "Apache Lucene" | where c.Match("jakarta apache") && c.Match("Apache Lucene") |
| Boolean Not | "jakarta apache" NOT "Apache Lucene" | where c.Match("jakarta apache") && !c.Match("Apache Lucene") |
| Required | +jakarta lucene | c.Title.Match("jakarta".Require(), "lucene") |
| Grouping | (jakarta OR apache) AND website | where (c.Title == "jakarta" || c.Title == "apache") && (c.Title == "website") |
| Native Syntax | ie. title:{+return +"pink panther") | c.Search("title:(return +\"pink panther\"") |
此版本专注于LINQ to Lucene项目的查询能力,能够将LINQ语句转换为Lucene查询,并支持延迟执行和对象创建或投影。该版本实现了Lucene原生提供的大多数LINQ查询特性。
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