There are some terminology explain at this link. http://www.elastic.co/guide/en/elasticsearch/reference/0.90/glossary.html
On Fri, Apr 24, 2015 at 10:09 AM, Jason Wee <peich...@gmail.com> wrote: > Yeap, that help, thanks Doug! :-) > > On Thu, Apr 23, 2015 at 10:56 PM, Doug Turnbull > <dturnb...@opensourceconnections.com> wrote: > > A term in a purely technical sense is an entry in the inverted index. > > Technically it is a very low-level entity. > > > > For example, if you tokenized and analyzed doc1: "Dougie Turnbull" using > the > > English analyzer (which stems words to root forms, lowercases, etc), > you'd > > get an inverted index that looks somethinglike: > > > > doug > > document: 1 > > position 0 > > freq 1 > > turnbul > > document: 1 > > position 1 > > freq 1 > > > > A "term query" therefore directly accesses terms. Its a bit of a > low-level > > concern. You'd have to query "doug" directly even though the original > text > > said "dougie". > > > > However, loosely people use the word "search term" to mean words people > > enter into a search bar. > > > > "string" is a concept that just reflects the text being analyzed. IE > "Dougie > > Turnbull". This type is at the Elasticsearch level, and is a peer for > > integer, floats, doubles etc. This type dicates how Elasticsearch > > understands the value passed from the client and converts it to the > inverted > > index structure above. A string type will be analyzed, picked apart into > > terms, etc based on the associated analyzer. Other types like numeric > types > > have other low-level magic that helps convert them to the inverted index > > data structure. > > > > Hope that helps, > > -Doug > > > > > > On Thu, Apr 23, 2015 at 10:42 AM, Jason Wee <peich...@gmail.com> wrote: > >> > >> Can anybody explain what is the different between term and string in > >> elasticsearch context? > >> > >> When we index using default mapping > >> ( > http://www.elastic.co/guide/en/elasticsearch/reference/current/indices-put-mapping.html > ), > >> the default type is string. > >> > >> But when we query, we use the word term > >> ( > http://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-term-query.html > ) > >> instead of string? > >> > >> I google lucene documentation, the term is define as > >> > >> A query is broken up into terms and operators. There are two types of > >> terms: Single Terms and Phrases. A Single Term is a single word such as > >> "test" or "hello". A Phrase is a group of words surrounded by double > quotes > >> such as "hello dolly". > >> > >> but it has no mentioned on string. > >> > >> > >> > https://lucene.apache.org/core/4_10_3/queryparser/org/apache/lucene/queryparser/classic/package-summary.html#package_description > >> > >> Thank you. > >> > >> Jason > >> > >> -- > >> You received this message because you are subscribed to the Google > Groups > >> "elasticsearch" group. > >> To unsubscribe from this group and stop receiving emails from it, send > an > >> email to elasticsearch+unsubscr...@googlegroups.com. > >> To view this discussion on the web visit > >> > https://groups.google.com/d/msgid/elasticsearch/df898132-f7f8-4476-8a81-21e3891dfb1a%40googlegroups.com > . > >> For more options, visit https://groups.google.com/d/optout. > > > > > > > > > > -- > > Doug Turnbull | Search Relevance Consultant | OpenSource Connections, > LLC | > > 240.476.9983 | http://www.opensourceconnections.com > > Author: Taming Search from Manning Publications > > This e-mail and all contents, including attachments, is considered to be > > Company Confidential unless explicitly stated otherwise, regardless of > > whether attachments are marked as such. > > > > -- > > You received this message because you are subscribed to the Google Groups > > "elasticsearch" group. > > To unsubscribe from this group and stop receiving emails from it, send an > > email to elasticsearch+unsubscr...@googlegroups.com. > > To view this discussion on the web visit > > > https://groups.google.com/d/msgid/elasticsearch/CALG6HL8RtomqZ3tWxB%2BEN2q_JHZmppGwzVw0HfPWJjTmzVNXCw%40mail.gmail.com > . > > > > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to elasticsearch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/CAHO4ityjCw-gCnSHxOyrHTkW1%2B4U13JbPvbaxcF6aeCmw%3DPH3A%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
