indexing

问题 I have a simple project in my xampp/htdocs directory called phalcon and I have apache configured to point to that folder so that I can go to phalcon/ in my browser. The problem occurs when I try to open an index controller view other than index(default). For instance I have someAction in Index controller and in views/index I have some.phtml. If I go to phalcon/index/some I don't get the text from some.phtml outputed to the page. It's probably because it thinks as if I wan't to open

问题 I've got a PostgreSQL table called queries_query , which has many columns. Two of these columns, created and user_sid , are frequently used together in SQL queries by my application to determine how many queries a given user has done over the past 30 days. It is very, very rare that I query these stats for any time older than the most recent 30 days. Here is my question: I've currently created my multi-column index on these two columns by running: CREATE INDEX CONCURRENTLY some_index_name ON

问题 Sitecore CMS+DMS 6.6.0 rev.130404 => 7.0 rev.130424 In our project we have been using AdvancedDatabaseCrawler (ADC) for our indexes (specially because of it's dynamic fields feature). Here's a sample index configuration: <index id="GeoIndex" type="Sitecore.Search.Index, Sitecore.Kernel"> <param desc="name">$(id)</param> <param desc="folder">$(id)</param> <analyzer ref="search/analyzer" /> <locations hint="list:AddCrawler"> <web type="scSearchContrib.Crawler.Crawlers.AdvancedDatabaseCrawler,

问题 In Entity Framework Code First approach, can we define the Primary Key as non-clustered index and a combination of few other fields as clustered index. Thanks 回答1: EntityTypeConfiguration does not provide a means of setting the Primary Key as a non-clustered index, but you can complete this by altering the initial migration used for table creation. There is an example here. Here is an example of how to specify a clustered multiple-column index using attributes: [Index("IX_ColumnOneTwo", 1,

问题 I have a table with a list of words. word VARCHAR(16) I need to create a reverse index. ie. word "apple" would index as "elppa", word "banana" as "ananab" and so on. Also, is it possible to index, say, a part of the word? Such as, skip the first/last 1 or 2 characters: pple (apple) anana (banana) are these things possible? 回答1: You can create an index on a field that's limited by prefix-length, meaning that only the first n characters will be considered, you can't do it with an arbitrary

问题 I am scraping election data from a website and trying to store it in a dataframe import pandas as pd import bs4 import requests columns = ['Candidate','Party','Criminal Cases','Education','Age','Total Assets','Liabilities'] df = pd.DataFrame(columns = columns) ind=1 url = requests.get("http://myneta.info/up2007/index.php?action=show_candidates&constituency_id=341") soup = bs4.BeautifulSoup(url.content) for content in soup.findAll("td")[16:]: df.iloc[ind//7,ind%7-1] = content.text ind=ind+1

问题 If my User table has several fields that are queryable (say DepartmentId, GroupId, RoleId) will it make any speed difference if I create an index for each combination of those fields? By "queryable", I'm referring to a query screen where the end user can select records based on Department, Group or Role by selecting from a drop-down. At the moment, I have a index on DepartmentId, GroupId and RoleId. That's a single non-unique index per field. If an end user selects "anyone in Group B", the

问题 Alter table table1 add index col1_idx (column1); Even though the table1 has many rows and all of the have non null values for column1, the above query says "0 Rows AFfected". Why could this be? 回答1: That is because the query is not directly affecting any rows as opposed to an update statement where you modify the row. It (very, very, very basically) only changes how the column is stored and sorted. 来源： https://stackoverflow.com/questions/10845197/mysql-add-index-0-rows-affected

问题 Alter table table1 add index col1_idx (column1); Even though the table1 has many rows and all of the have non null values for column1, the above query says "0 Rows AFfected". Why could this be? 回答1: That is because the query is not directly affecting any rows as opposed to an update statement where you modify the row. It (very, very, very basically) only changes how the column is stored and sorted. 来源： https://stackoverflow.com/questions/10845197/mysql-add-index-0-rows-affected

问题 I wish to enable a special index, called Sectors, for a attribute ('sectors') of my Dexterity based custom content-type. In my schema, inside types/mycontent.py I have: class IMyContent(form.Schema): """ My Content """ sectors = schema.Set( title=_(u"Sectors"), description=_(u"Select some sectors"), value_type=schema.Choice(vocabulary=vocs.sectors), required=True, ) (...) I then define the index in this way, inside indexers.py from plone.indexer.decorator import indexer from zr.content.types