Sarah Hoffmann [Thu, 2 Sep 2021 16:13:45 +0000 (18:13 +0200)]
reduce penalty for special searches by name
Additional penalty for special terms with operator None
should only go to near searches. To reduce the number
of produced searches, restrict the none operator to
appear only in conjunction with the name.
Sarah Hoffmann [Fri, 20 Aug 2021 19:53:13 +0000 (21:53 +0200)]
move linking of places to the preparation stage
Linked places may bring in extra names. These names need to be
processed by the tokenizer. That means that the linking needs
to be done before the data is handed to the tokenizer. Move finding
the linked place into the preparation stage and update the name
fields. Everything else is still done in the indexing stage.
Sarah Hoffmann [Tue, 17 Aug 2021 21:11:47 +0000 (23:11 +0200)]
rename legacy_icu tokenizer to icu tokenizer
The new icu tokenizer is now no longer compatible with the old
legacy tokenizer in terms of data structures. Therefore there
is also no longer a need to refer to the legacy tokenizer in the
name.
Sarah Hoffmann [Tue, 17 Aug 2021 12:28:55 +0000 (14:28 +0200)]
move special hack for US states to legacy tokenizer
The hack for IL, AL and LA is only needed because these abbreviations
are removed by the legacy tokenizer as a stop word. There is no need
to keep the hack for future tokenizers. Move it therefore to the
token extraction function.
Sarah Hoffmann [Mon, 16 Aug 2021 09:48:25 +0000 (11:48 +0200)]
add mkdocstrings requirement for building docs
mkdocstrings also needs access to the Python sources, so set
a PYTHONPATH accordingly. This makes running mkdocs directly
a bit awkward, therefore add a `make serve-doc` target.
Sarah Hoffmann [Thu, 12 Aug 2021 09:09:46 +0000 (11:09 +0200)]
php: make word list a first-class object
This separates the logic of creating word sets from the Phrase
class. A tokenizer may now derived the word sets any way they
like. The SimpleWordList class provides a standard implementation
for splitting phrases on spaces.
Sarah Hoffmann [Thu, 29 Jul 2021 19:25:59 +0000 (21:25 +0200)]
remove country restriction from tokenizer
Restricting tokens due to the search context is better done in
the generic search part instead of repeating the same test in
every tokenizer implementation.
Sarah Hoffmann [Sat, 14 Aug 2021 21:48:06 +0000 (23:48 +0200)]
port multi-region update scripts to nominatim tool
Also updates the documentation. For the simple case of just
importing multiple regions, provide simplified instructions
that use the new multi-file import feature.
Sarah Hoffmann [Sun, 25 Jul 2021 13:08:11 +0000 (15:08 +0200)]
reinstate word column in icu word table
Postgresql is very bad at creating statistics for jsonb
columns. The result is that the query planer tends to
use JIT for queries with a where over 'info' even when
there is an index.
Sarah Hoffmann [Sat, 24 Jul 2021 10:12:31 +0000 (12:12 +0200)]
bdd tests: do not query word table directly
The BDD tests cannot make assumptions about the structure of the
word table anymore because it depends on the tokenizer. Use more
abstract descriptions instead that ask for specific kinds of
tokens.
Sarah Hoffmann [Thu, 22 Jul 2021 15:24:43 +0000 (17:24 +0200)]
adapt unit test for new word table
Requires a second wrapper class for the word table with the new
layout. This class is interface-compatible, so that later when
the ICU tokenizer becomes the default, all tests that depend on
behaviour of the default tokenizer can be switched to the other
wrapper.
Sarah Hoffmann [Tue, 20 Jul 2021 08:27:06 +0000 (10:27 +0200)]
new word table layout for icu tokenizer
The table now directly reflects the different token types.
Extra information is saved in a json structure that may be
dynamically extended in the future without affecting the
table layout.
Sarah Hoffmann [Sat, 17 Jul 2021 18:24:33 +0000 (20:24 +0200)]
move SearchDescription building into tokens
Moving the logic for extending the SearchDescription into the
token classes splits up the code and makes it more readable.
More importantly: it allows tokenizer to define custom token
classes in the future.
Sarah Hoffmann [Thu, 15 Jul 2021 12:48:20 +0000 (14:48 +0200)]
remove Token from explicit input for SearchDescription extension
The token string is only required by the PartialToken type, so
it can simply save the token string internally. No need to pass
it to every type.
Also moves the check for multi-word partials to the token loader
code in the tokenizer. Multi-word partials can only happen with
the legacy tokenizer and when the database was loaded with an
older version of Nominatim. No need to keep the check for
everybody.
Sarah Hoffmann [Thu, 15 Jul 2021 12:12:59 +0000 (14:12 +0200)]
factor out query position
Moves token and phrase position and phrase type into a separate
class that is handed in when assembling the search description.
This drastically reduces the number of parameters for the function
to extend the search descriptions and gives us more flexibility
in the future for more complex positional analysis.
Sarah Hoffmann [Wed, 14 Jul 2021 20:17:17 +0000 (22:17 +0200)]
remove special status of partial tokens
Full-word tokens are no longer marked by a space at the
beginning of the token. Use the new Partial token category
instead. This removes a couple of special casing, we don't
really need.
The word table still has the space for compatibility reasons,
so the tokenizer code needs to get rid of it when loading the
tokens.