full-text-search

问题 I'm getting a bit confused when trying to set up a search utilizing fulltext search in boolean mode. Here is the query I'm using: $query = "SELECT *, MATCH(title) AGAINST('$q' IN BOOLEAN MODE) AS score FROM results WHERE MATCH(title) AGAINST('$q' IN BOOLEAN MODE) ORDER BY score DESC"; When I run a search for +divorce+refinance , the results returned are: 1) Divorce: Paying Off Spouse = Rate/Term Refinance 2) Divorce - What to Look Out For Regarding Divorced Borrowers Am I right in thinking

问题 I have a full text catalog with two tables in it. tableA has 4 columns (a1, a2, a3, a4) of wich 3 are indexed in the catalog, a2,a3,a4. a1 is the primary key. tableB has 3 columns (b1, b2, b3, b4), two of which are indexed in the catalog, b3 and b4. b1 is the PK of this table, b2 is the FK to tableA. I want to do something like SELECT *, (ftTableA.[RANK] + ftTableB.[RANK]) AS total_rank FROM tableA INNER JOIN tableB ON tableA.a1=tableB.b2 INNER JOIN FREETEXTTABLE(tableA, (a2,a3,a4), 'search

问题 How can I search in (put condition on) blob field in oracle, like text fields? I need someting like: select * from table_name where blob_field like '%00ff00ff%' Oracle throws some error on it. 回答1: You can use dbms_lob.instr for this purpose i.e. select * from table_name where dbms_lob.instr(blob_field, utl_raw.CAST_TO_RAW('00ff00ff'), 1, 1) > 0 来源： https://stackoverflow.com/questions/4577986/conditions-like-like-on-binary-field-blob-in-oracle

问题 I am implementing search result view to my app. I figured out that mongoose internally provide full text search function with $text. I put the code below to Post.js PostSchema.index({desc: 'text'}); //for example Here's the code I put in my routing file route/posts.js Post.find({$text: {$search : 'please work!'}}).exec(function (err, posts) {...}) The error message I come up with is below Index with pattern: { _fts: "text", _ftsx: 1 } already exists with different options Would there any body

问题 In MySQL, I would like to do a FULLTEXT search on a table 'articles'. The text I want to search against would be located in another table, 'Vectors' under the column 'CVs' I am trying: SELECT website FROM articles WHERE MATCH (title, body) AGAINST( SELECT CVs FROM Vectors WHERE Title="cv1") However, it keeps returning syntax error. Is it possible to run a subquery in the AGAINST clause? 回答1: You would like to be able to do: SELECT website FROM articles cross join vectors WHERE title = 'cv1'

问题 I have 100 billion rows of data that I have split into multiple solr instances, each with a separate schema. I need to: Query each instance. Get the results from each instance. Append those results to a final query. Call a final Solr instance for the ultimate result. How can I do this? Do I need to write a separate requestHandler? eg, $ curl http://localhost:8983/solr/select?q=query1.result AND ... AND queryN.result 回答1: what you are looking for is called distributed search -> http://wiki

问题 We use mongoDB fulltext search to find products in our database. Unfortunately it is incredible slow. The collection contains 89.114.052 documents and I have the suspicion, that the full text index is not used. Performing a search with explain(), nscannedObjects returns 133212. Shouldn't this be 0 if an index is used? My index: { "v" : 1, "key" : { "_fts" : "text", "_ftsx" : 1 }, "name" : "textIndex", "ns" : "search.products", "weights" : { "brand" : 1, "desc" : 1, "ean" : 1, "name" : 3,

问题 I have a table that contains a text field, there is around 3 to 4 sentences in the field depending on the row. Now, I am making an auto-complete html object, and I would like to start typing the beginning of a word and that the database return words that start with those letters from the database text field. Example of a text field: I like fishsticks, fishhat are great too in my auto-complete if I would type "fish" it would propose "fishsticks" and "fishhat" Everything works but the query. I

问题 In my stored procedure, when a long word is passed, server shows error, with part of the word. I am not sure what is happening .. the word seems to break, but I have given a big value for that variable My procedure: SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO ALTER PROCEDURE [dbo].[SP_BuyOnlineSearchNew]-- '1','BMW X6 IN GOOD CONDITION FOR SALE','0','0' @CategoryID varchar(20), @SearchString varchar(max), @RecentAd int, @RowsPerPage INT, @PageNumber INT, @pricefrom INT, @priceto INT,

问题 How can I index a numeric field as both a integer and string using multi_field . As multi_field is deprecated now. How can I achieve the same using the "fields" field in version 2.x. I have heard that a field can be indexing and analysed in different ways using "fields". But can it be indexed as different types in elastic search? The issue that I am facing is the classical numeric field search highlighting issue in elastic search.where I could not get numeric fields highlighting. So I want to