query function like matches can't work fast as = op , how to optimizer it? how to create range index?

> I found the @attribute='value' operation will fast after create attribute > index, but function like matches,contains,starts-with has no effect even > after create text index. > how to optimum it , how to create path index, range index?

At 2013-11-19 04:02:28,"Christian Grün" <christian.gruen at gmail.com> wrote: >Hi Easy, > >> I found the @attribute='value' operation will fast after create attribute >> index, but function like matches,contains,starts-with has no effect even >> after create text index. >> how to optimum it , how to create path index, range index? > >matches() works on arbitrary regular expressions, which is why a value >index won’t be of any help. contains() is difficult, too, because it >allows you to search for arbitrary substrings. starts-with() could >indeed be rewritten to take advantage of an index structure, but this >hasn’t been done yet. > >Christian

Am 19.11.2013 00:51 schrieb "easy" <lin_xd at 126.com>: > > Thanks. > > but there is some way to create path/range index manually? > > > > > -- > 此致 > > easy > > 莫愁前路无知己，天下谁人不识君。 > > > At 2013-11-19 04:02:28,"Christian Grün" <christian.gruen at gmail.com> wrote: > >Hi Easy, > > > >> I found the @attribute='value' operation will fast after create attribute > >> index, but function like matches,contains,starts-with has no effect even > >> after create text index. > >> how to optimum it , how to create path index, range index? > > > >matches() works on arbitrary regular expressions, which is why a value > >index won’t be of any help. contains() is difficult, too, because it > >allows you to search for arbitrary substrings. starts-with() could > >indeed be rewritten to take advantage of an index structure, but this > >hasn’t been done yet. > > > >Christian > > >

At 2013-11-19 08:24:26,"Christian Grün" <christian.gruen at gmail.com> wrote:

Am 19.11.2013 00:51 schrieb "easy" <lin_xd at 126.com>: > > Thanks. > > but there is some way to create path/range index manually? > > > > > -- > 此致 > > easy > > 莫愁前路无知己，天下谁人不识君。 > > > At 2013-11-19 04:02:28,"Christian Grün" <christian.gruen at gmail.com> wrote: > >Hi Easy, > > > >> I found the @attribute='value' operation will fast after create attribute > >> index, but function like matches,contains,starts-with has no effect even > >> after create text index. > >> how to optimum it , how to create path index, range index? > > > >matches() works on arbitrary regular expressions, which is why a value > >index won’t be of any help. contains() is difficult, too, because it > >allows you to search for arbitrary substrings. starts-with() could > >indeed be rewritten to take advantage of an index structure, but this > >hasn’t been done yet. > > > >Christian > > >

At 2013-11-19 04:02:28,"Christian Grün" <christian.gruen at gmail.com> wrote: >Hi Easy, > >> I found the @attribute='value' operation will fast after create attribute >> index, but function like matches,contains,starts-with has no effect even >> after create text index. >> how to optimum it , how to create path index, range index? > >matches() works on arbitrary regular expressions, which is why a value >index won’t be of any help. contains() is difficult, too, because it >allows you to search for arbitrary substrings. starts-with() could >indeed be rewritten to take advantage of an index structure, but this >hasn’t been done yet. > >Christian

> I have download the trunk version basex, but I run in centeros, is there > some different for different os?