full-text-search

问题 I have a view that I'd like to apply a full text index on. It of course needs a unique clustered index to allow for the full text index. Unforunately, I learned that you cannot create an indexed view that contains outer joins. Problem is that my view needs these outer joins! Is there a way to make this happen, or am I going to be stuck writing a complex stored procedure? 回答1: Is it possible to create a dummy record to join to for the purposes of this view? 来源： https://stackoverflow.com

问题 Hi and thanks for looking! I'm searching for articles which contain certain strings with full text search, something like this: SELECT * FROM Articles_fts WHERE body MATCH 'monkey OR banana OR "hungry gorilla"'; My real search is much longer (22 terms) and probably not the smartest way of doing this but it's working so no problems there. What I need help with... Now I want to return the OPPOSITE of what this search returns. In other words I want all the articles that don't contain monkey,

问题 I'm using full text search supported by postgres, I installed acts_as_tsearch plugin and it works successfully, but when I tried it later I found an error runtimeError: ERROR C42883 Mfunction ts_rank_cd(text, tsquery) does not exist HNo function matches the given name and argument types. You might need to add explicit type 回答1: You need to cast your first parameter into a tsvector. So let's assume you're searching against a column named foo.text . You will want to change from this: SELECT ts

问题 I have a list of books listed by their titles in a text file. I want to write a script which can use a web service like Google scholar or amazon to search for the books and return me a xml or bibtex file with citation info for each book. Which programming tools can I use for this kind of automated search ? 回答1: Python would be my recommendation. Get names from the text file, simple file reading Construct a REST URL request to google's book API http://books.google.com/books/feeds/volumes?q

问题 I'm using LAMP on my machine and I'm using the functionality of Full-Text search in my website. I don't want to consider the by default list of "Full-Text Stopwords" during the Full-Text search. But I want to give some stopwords manually which must not be considered during Full-Text search. Can anyone tell me how should I achieve this? If you need any further information regarding the issue I can provide you the same. Thanks for understanding my issue. 回答1: As documented under Fine-Tuning

问题 Does anyone have experience of using MongoDB full text search in production? What advice can you give me about that? I think it is a little risky to use it in production because it's in beta state. Am i right? 回答1: Currently (September 2013) The MongoDB fulltext search is still in beta stage. The documentation explicitely warns from using it: The text search is currently a beta feature [...] Warning: •Do not enable or use text search on production systems. Likely reasons for this warning:

问题 In my app i have generated a scaffold called data and had filed the table with name, school, college, views, interest. Now i want to add a search that if someone put NAME in the search bar, they should get all the names only as results, if someone had put college, they should get all the college only. Am pretty new to rails, so i tried watching some tutorials, and had added this but this is not what i want <%= form_tag data_path, :method => 'get' do %> <%= text_field_tag :search, params[

问题 Has anyone done any performance measures with this in terms of speed where there is a high number of substitutes for any given word. For instance, I want to use this to store common misspellings; expecting to have 4-10 variations of a word. <expansion> _{administration} _{administraton} _aministraton </expansion> When you run a fulltext search, how does performance degrade with that number of variations? for instance, I assume it has to do a separate fulltext search

问题 Say I have multiple blocks of the following code in a file (spaces is irrelavent): sdgfsdg dfg dfgdfgf ddfg dfgdfgdfg dfgfdg How do you find/highlight all the occurrences? What I ideally want to do is to visually select the code block and then press search to find all occurrences. 回答1: The text being searched for is stored in the / register. You can't yank or delete directly into this register, but you can assign to it using `let'. Try this: Use visual mode to highlight the code you want to

问题 I will try to explain this issue as properly as I can. It's really weird in my mind, hopefully some of you guys have an idea of what might be wrong. I have built a website with a search function, which uses full text search in MySQL, and searches in a table that is a dictionary. I have set ft_min_word_len = 1 and ft_stopword_file = "" on both my test (windows xampp) and live (ubuntu 12.04) server. Now, on my localhost test server if I search for example the word "hello", it returns around 20