X-Git-Url: https://git.openstreetmap.org/nominatim.git/blobdiff_plain/a0f5613a23167752c97dd17fc42cd1e4e97cf4eb..3bf3b894eaddd4f17f7e92353af6b2aa6200ab20:/nominatim/tokenizer/icu_tokenizer.py

diff --git a/nominatim/tokenizer/icu_tokenizer.py b/nominatim/tokenizer/icu_tokenizer.py
index 2af0bcb2..a6ff08a4 100644
--- a/nominatim/tokenizer/icu_tokenizer.py
+++ b/nominatim/tokenizer/icu_tokenizer.py
@@ -1,3 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# This file is part of Nominatim. (https://nominatim.org)
+#
+# Copyright (C) 2022 by the Nominatim developer community.
+# For a full list of authors see the git log.
 """
 Tokenizer implementing normalisation as used before Nominatim 4 but using
 libICU instead of the PostgreSQL module.
@@ -5,11 +11,9 @@ libICU instead of the PostgreSQL module.
 import itertools
 import json
 import logging
-import re
 from textwrap import dedent
 
 from nominatim.db.connection import connect
-from nominatim.db.properties import set_property, get_property
 from nominatim.db.utils import CopyBuffer
 from nominatim.db.sql_preprocessor import SQLPreprocessor
 from nominatim.indexer.place_info import PlaceInfo
@@ -36,7 +40,6 @@ class LegacyICUTokenizer(AbstractTokenizer):
         self.dsn = dsn
         self.data_dir = data_dir
         self.loader = None
-        self.term_normalization = None
 
 
     def init_new_db(self, config, init_db=True):
@@ -47,9 +50,7 @@ class LegacyICUTokenizer(AbstractTokenizer):
         """
         self.loader = ICURuleLoader(config)
 
-        self.term_normalization = config.TERM_NORMALIZATION
-
-        self._install_php(config.lib_dir.php)
+        self._install_php(config.lib_dir.php, overwrite=True)
         self._save_config()
 
         if init_db:
@@ -64,13 +65,17 @@ class LegacyICUTokenizer(AbstractTokenizer):
 
         with connect(self.dsn) as conn:
             self.loader.load_config_from_db(conn)
-            self.term_normalization = get_property(conn, DBCFG_TERM_NORMALIZATION)
+
+        self._install_php(config.lib_dir.php, overwrite=False)
 
 
-    def finalize_import(self, _):
+    def finalize_import(self, config):
         """ Do any required postprocessing to make the tokenizer data ready
             for use.
         """
+        with connect(self.dsn) as conn:
+            sqlp = SQLPreprocessor(conn, config)
+            sqlp.run_sql_file(conn, 'tokenizer/legacy_tokenizer_indices.sql')
 
 
     def update_sql_functions(self, config):
@@ -84,33 +89,73 @@ class LegacyICUTokenizer(AbstractTokenizer):
     def check_database(self, config):
         """ Check that the tokenizer is set up correctly.
         """
+        # Will throw an error if there is an issue.
         self.init_from_project(config)
 
-        if self.term_normalization is None:
-            return "Configuration for tokenizer 'icu' are missing."
-
-        return None
-
 
     def update_statistics(self):
         """ Recompute frequencies for all name words.
         """
         with connect(self.dsn) as conn:
-            with conn.cursor() as cur:
-                cur.drop_table("word_frequencies")
-                LOG.info("Computing word frequencies")
-                cur.execute("""CREATE TEMP TABLE word_frequencies AS
-                                 SELECT unnest(name_vector) as id, count(*)
-                                 FROM search_name GROUP BY id""")
-                cur.execute("CREATE INDEX ON word_frequencies(id)")
-                LOG.info("Update word table with recomputed frequencies")
-                cur.execute("""UPDATE word
-                               SET info = info || jsonb_build_object('count', count)
-                               FROM word_frequencies WHERE word_id = id""")
-                cur.drop_table("word_frequencies")
+            if conn.table_exists('search_name'):
+                with conn.cursor() as cur:
+                    cur.drop_table("word_frequencies")
+                    LOG.info("Computing word frequencies")
+                    cur.execute("""CREATE TEMP TABLE word_frequencies AS
+                                     SELECT unnest(name_vector) as id, count(*)
+                                     FROM search_name GROUP BY id""")
+                    cur.execute("CREATE INDEX ON word_frequencies(id)")
+                    LOG.info("Update word table with recomputed frequencies")
+                    cur.execute("""UPDATE word
+                                   SET info = info || jsonb_build_object('count', count)
+                                   FROM word_frequencies WHERE word_id = id""")
+                    cur.drop_table("word_frequencies")
             conn.commit()
 
 
+    def _cleanup_housenumbers(self):
+        """ Remove unused house numbers.
+        """
+        with connect(self.dsn) as conn:
+            if not conn.table_exists('search_name'):
+                return
+            with conn.cursor(name="hnr_counter") as cur:
+                cur.execute("""SELECT DISTINCT word_id, coalesce(info->>'lookup', word_token)
+                               FROM word
+                               WHERE type = 'H'
+                                 AND NOT EXISTS(SELECT * FROM search_name
+                                                WHERE ARRAY[word.word_id] && name_vector)
+                                 AND (char_length(coalesce(word, word_token)) > 6
+                                      OR coalesce(word, word_token) not similar to '\\d+')
+                            """)
+                candidates = {token: wid for wid, token in cur}
+            with conn.cursor(name="hnr_counter") as cur:
+                cur.execute("""SELECT housenumber FROM placex
+                               WHERE housenumber is not null
+                                     AND (char_length(housenumber) > 6
+                                          OR housenumber not similar to '\\d+')
+                            """)
+                for row in cur:
+                    for hnr in row[0].split(';'):
+                        candidates.pop(hnr, None)
+            LOG.info("There are %s outdated housenumbers.", len(candidates))
+            LOG.debug("Outdated housenumbers: %s", candidates.keys())
+            if candidates:
+                with conn.cursor() as cur:
+                    cur.execute("""DELETE FROM word WHERE word_id = any(%s)""",
+                                (list(candidates.values()), ))
+                conn.commit()
+
+
+
+    def update_word_tokens(self):
+        """ Remove unused tokens.
+        """
+        LOG.warning("Cleaning up housenumber tokens.")
+        self._cleanup_housenumbers()
+        LOG.warning("Tokenizer house-keeping done.")
+
+
     def name_analyzer(self):
         """ Create a new analyzer for tokenizing names and queries
             using this tokinzer. Analyzers are context managers and should
@@ -130,16 +175,18 @@ class LegacyICUTokenizer(AbstractTokenizer):
                                      self.loader.make_token_analysis())
 
 
-    def _install_php(self, phpdir):
+    def _install_php(self, phpdir, overwrite=True):
         """ Install the php script for the tokenizer.
         """
         php_file = self.data_dir / "tokenizer.php"
-        php_file.write_text(dedent(f"""\
-            <?php
-            @define('CONST_Max_Word_Frequency', 10000000);
-            @define('CONST_Term_Normalization_Rules', "{self.term_normalization}");
-            @define('CONST_Transliteration', "{self.loader.get_search_rules()}");
-            require_once('{phpdir}/tokenizer/icu_tokenizer.php');"""))
+
+        if not php_file.exists() or overwrite:
+            php_file.write_text(dedent(f"""\
+                <?php
+                @define('CONST_Max_Word_Frequency', 10000000);
+                @define('CONST_Term_Normalization_Rules', "{self.loader.normalization_rules}");
+                @define('CONST_Transliteration', "{self.loader.get_search_rules()}");
+                require_once('{phpdir}/tokenizer/icu_tokenizer.php');"""), encoding='utf-8')
 
 
     def _save_config(self):
@@ -148,7 +195,6 @@ class LegacyICUTokenizer(AbstractTokenizer):
         """
         with connect(self.dsn) as conn:
             self.loader.save_config_to_db(conn)
-            set_property(conn, DBCFG_TERM_NORMALIZATION, self.term_normalization)
 
 
     def _init_db_tables(self, config):
@@ -231,8 +277,7 @@ class LegacyICUNameAnalyzer(AbstractAnalyzer):
                + [(k, v, part_ids.get(v, None)) for k, v in partial_tokens.items()]
 
 
-    @staticmethod
-    def normalize_postcode(postcode):
+    def normalize_postcode(self, postcode):
         """ Convert the postcode to a standardized form.
 
             This function must yield exactly the same result as the SQL function
@@ -241,44 +286,76 @@ class LegacyICUNameAnalyzer(AbstractAnalyzer):
         return postcode.strip().upper()
 
 
-    def _make_standard_hnr(self, hnr):
-        """ Create a normalised version of a housenumber.
-
-            This function takes minor shortcuts on transliteration.
-        """
-        return self._search_normalized(hnr)
-
     def update_postcodes_from_db(self):
         """ Update postcode tokens in the word table from the location_postcode
             table.
         """
-        to_delete = []
+        analyzer = self.token_analysis.analysis.get('@postcode')
+
         with self.conn.cursor() as cur:
-            # This finds us the rows in location_postcode and word that are
-            # missing in the other table.
-            cur.execute("""SELECT * FROM
-                            (SELECT pc, word FROM
-                              (SELECT distinct(postcode) as pc FROM location_postcode) p
-                              FULL JOIN
-                              (SELECT word FROM word WHERE type = 'P') w
-                              ON pc = word) x
-                           WHERE pc is null or word is null""")
-
-            with CopyBuffer() as copystr:
-                for postcode, word in cur:
-                    if postcode is None:
-                        to_delete.append(word)
-                    else:
-                        copystr.add(self._search_normalized(postcode),
-                                    'P', postcode)
-
-                if to_delete:
-                    cur.execute("""DELETE FROM WORD
-                                   WHERE type ='P' and word = any(%s)
-                                """, (to_delete, ))
-
-                copystr.copy_out(cur, 'word',
-                                 columns=['word_token', 'type', 'word'])
+            # First get all postcode names currently in the word table.
+            cur.execute("SELECT DISTINCT word FROM word WHERE type = 'P'")
+            word_entries = set((entry[0] for entry in cur))
+
+            # Then compute the required postcode names from the postcode table.
+            needed_entries = set()
+            cur.execute("SELECT country_code, postcode FROM location_postcode")
+            for cc, postcode in cur:
+                info = PlaceInfo({'country_code': cc,
+                                  'class': 'place', 'type': 'postcode',
+                                  'address': {'postcode': postcode}})
+                address = self.sanitizer.process_names(info)[1]
+                for place in address:
+                    if place.kind == 'postcode':
+                        if analyzer is None:
+                            postcode_name = place.name.strip().upper()
+                            variant_base = None
+                        else:
+                            postcode_name = analyzer.normalize(place.name)
+                            variant_base = place.get_attr("variant")
+
+                        if variant_base:
+                            needed_entries.add(f'{postcode_name}@{variant_base}')
+                        else:
+                            needed_entries.add(postcode_name)
+                        break
+
+        # Now update the word table.
+        self._delete_unused_postcode_words(word_entries - needed_entries)
+        self._add_missing_postcode_words(needed_entries - word_entries)
+
+    def _delete_unused_postcode_words(self, tokens):
+        if tokens:
+            with self.conn.cursor() as cur:
+                cur.execute("DELETE FROM word WHERE type = 'P' and word = any(%s)",
+                            (list(tokens), ))
+
+    def _add_missing_postcode_words(self, tokens):
+        if not tokens:
+            return
+
+        analyzer = self.token_analysis.analysis.get('@postcode')
+        terms = []
+
+        for postcode_name in tokens:
+            if '@' in postcode_name:
+                term, variant = postcode_name.split('@', 2)
+                term = self._search_normalized(term)
+                variants = {term}
+                if analyzer is not None:
+                    variants.update(analyzer.get_variants_ascii(variant))
+                    variants = list(variants)
+            else:
+                variants = [self._search_normalized(postcode_name)]
+            terms.append((postcode_name, variants))
+
+        if terms:
+            with self.conn.cursor() as cur:
+                cur.execute_values("""SELECT create_postcode_word(pc, var)
+                                      FROM (VALUES %s) AS v(pc, var)""",
+                                   terms)
+
+
 
 
     def update_special_phrases(self, phrases, should_replace):
@@ -349,17 +426,18 @@ class LegacyICUNameAnalyzer(AbstractAnalyzer):
 
 
     def add_country_names(self, country_code, names):
-        """ Add names for the given country to the search index.
+        """ Add default names for the given country to the search index.
         """
         # Make sure any name preprocessing for country names applies.
         info = PlaceInfo({'name': names, 'country_code': country_code,
                           'rank_address': 4, 'class': 'boundary',
                           'type': 'administrative'})
         self._add_country_full_names(country_code,
-                                     self.sanitizer.process_names(info)[0])
+                                     self.sanitizer.process_names(info)[0],
+                                     internal=True)
 
 
-    def _add_country_full_names(self, country_code, names):
+    def _add_country_full_names(self, country_code, names, internal=False):
         """ Add names for the given country from an already sanitized
             name list.
         """
@@ -371,21 +449,41 @@ class LegacyICUNameAnalyzer(AbstractAnalyzer):
 
         with self.conn.cursor() as cur:
             # Get existing names
-            cur.execute("""SELECT word_token FROM word
-                            WHERE type = 'C' and word = %s""",
+            cur.execute("""SELECT word_token, coalesce(info ? 'internal', false) as is_internal
+                             FROM word
+                             WHERE type = 'C' and word = %s""",
                         (country_code, ))
-            word_tokens.difference_update((t[0] for t in cur))
+            existing_tokens = {True: set(), False: set()} # internal/external names
+            for word in cur:
+                existing_tokens[word[1]].add(word[0])
+
+            # Delete names that no longer exist.
+            gone_tokens = existing_tokens[internal] - word_tokens
+            if internal:
+                gone_tokens.update(existing_tokens[False] & word_tokens)
+            if gone_tokens:
+                cur.execute("""DELETE FROM word
+                               USING unnest(%s) as token
+                               WHERE type = 'C' and word = %s
+                                     and word_token = token""",
+                            (list(gone_tokens), country_code))
 
             # Only add those names that are not yet in the list.
-            if word_tokens:
-                cur.execute("""INSERT INTO word (word_token, type, word)
-                               (SELECT token, 'C', %s
-                                FROM unnest(%s) as token)
-                            """, (country_code, list(word_tokens)))
-
-            # No names are deleted at the moment.
-            # If deletion is made possible, then the static names from the
-            # initial 'country_name' table should be kept.
+            new_tokens = word_tokens - existing_tokens[True]
+            if not internal:
+                new_tokens -= existing_tokens[False]
+            if new_tokens:
+                if internal:
+                    sql = """INSERT INTO word (word_token, type, word, info)
+                               (SELECT token, 'C', %s, '{"internal": "yes"}'
+                                  FROM unnest(%s) as token)
+                           """
+                else:
+                    sql = """INSERT INTO word (word_token, type, word)
+                                   (SELECT token, 'C', %s
+                                    FROM unnest(%s) as token)
+                          """
+                cur.execute(sql, (country_code, list(new_tokens)))
 
 
     def process_place(self, place):
@@ -394,14 +492,12 @@ class LegacyICUNameAnalyzer(AbstractAnalyzer):
             Returns a JSON-serializable structure that will be handed into
             the database via the token_info field.
         """
-        token_info = _TokenInfo(self._cache)
+        token_info = _TokenInfo()
 
         names, address = self.sanitizer.process_names(place)
 
         if names:
-            fulls, partials = self._compute_name_tokens(names)
-
-            token_info.add_names(fulls, partials)
+            token_info.set_names(*self._compute_name_tokens(names))
 
             if place.is_country():
                 self._add_country_full_names(place.country_code, names)
@@ -409,31 +505,59 @@ class LegacyICUNameAnalyzer(AbstractAnalyzer):
         if address:
             self._process_place_address(token_info, address)
 
-        return token_info.data
+        return token_info.to_dict()
 
 
     def _process_place_address(self, token_info, address):
-        hnrs = []
-        addr_terms = []
         for item in address:
             if item.kind == 'postcode':
-                self._add_postcode(item.name)
-            elif item.kind in ('housenumber', 'streetnumber', 'conscriptionnumber'):
-                hnrs.append(item.name)
+                token_info.set_postcode(self._add_postcode(item))
+            elif item.kind == 'housenumber':
+                token_info.add_housenumber(*self._compute_housenumber_token(item))
             elif item.kind == 'street':
-                token_info.add_street(self._compute_partial_tokens(item.name))
+                token_info.add_street(self._retrieve_full_tokens(item.name))
             elif item.kind == 'place':
-                token_info.add_place(self._compute_partial_tokens(item.name))
-            elif not item.kind.startswith('_') and \
-                 item.kind not in ('country', 'full'):
-                addr_terms.append((item.kind, self._compute_partial_tokens(item.name)))
+                if not item.suffix:
+                    token_info.add_place(self._compute_partial_tokens(item.name))
+            elif not item.kind.startswith('_') and not item.suffix and \
+                 item.kind not in ('country', 'full', 'inclusion'):
+                token_info.add_address_term(item.kind, self._compute_partial_tokens(item.name))
+
+
+    def _compute_housenumber_token(self, hnr):
+        """ Normalize the housenumber and return the word token and the
+            canonical form.
+        """
+        analyzer = self.token_analysis.analysis.get('@housenumber')
+        result = None, None
 
-        if hnrs:
-            hnrs = self._split_housenumbers(hnrs)
-            token_info.add_housenumbers(self.conn, [self._make_standard_hnr(n) for n in hnrs])
+        if analyzer is None:
+            # When no custom analyzer is set, simply normalize and transliterate
+            norm_name = self._search_normalized(hnr.name)
+            if norm_name:
+                result = self._cache.housenumbers.get(norm_name, result)
+                if result[0] is None:
+                    with self.conn.cursor() as cur:
+                        cur.execute("SELECT getorcreate_hnr_id(%s)", (norm_name, ))
+                        result = cur.fetchone()[0], norm_name
+                        self._cache.housenumbers[norm_name] = result
+        else:
+            # Otherwise use the analyzer to determine the canonical name.
+            # Per convention we use the first variant as the 'lookup name', the
+            # name that gets saved in the housenumber field of the place.
+            norm_name = analyzer.normalize(hnr.name)
+            if norm_name:
+                result = self._cache.housenumbers.get(norm_name, result)
+                if result[0] is None:
+                    variants = analyzer.get_variants_ascii(norm_name)
+                    if variants:
+                        with self.conn.cursor() as cur:
+                            cur.execute("SELECT create_analyzed_hnr_id(%s, %s)",
+                                        (norm_name, list(variants)))
+                            result = cur.fetchone()[0], variants[0]
+                            self._cache.housenumbers[norm_name] = result
 
-        if addr_terms:
-            token_info.add_address_terms(addr_terms)
+        return result
 
 
     def _compute_partial_tokens(self, name):
@@ -464,6 +588,26 @@ class LegacyICUNameAnalyzer(AbstractAnalyzer):
         return tokens
 
 
+    def _retrieve_full_tokens(self, name):
+        """ Get the full name token for the given name, if it exists.
+            The name is only retrived for the standard analyser.
+        """
+        norm_name = self._search_normalized(name)
+
+        # return cached if possible
+        if norm_name in self._cache.fulls:
+            return self._cache.fulls[norm_name]
+
+        with self.conn.cursor() as cur:
+            cur.execute("SELECT word_id FROM word WHERE word_token = %s and type = 'W'",
+                        (norm_name, ))
+            full = [row[0] for row in cur]
+
+        self._cache.fulls[norm_name] = full
+
+        return full
+
+
     def _compute_name_tokens(self, names):
         """ Computes the full name and partial name tokens for the given
             dictionary of names.
@@ -473,7 +617,8 @@ class LegacyICUNameAnalyzer(AbstractAnalyzer):
 
         for name in names:
             analyzer_id = name.get_attr('analyzer')
-            norm_name = self._normalized(name.name)
+            analyzer = self.token_analysis.get_analyzer(analyzer_id)
+            norm_name = analyzer.normalize(name.name)
             if analyzer_id is None:
                 token_id = norm_name
             else:
@@ -481,12 +626,12 @@ class LegacyICUNameAnalyzer(AbstractAnalyzer):
 
             full, part = self._cache.names.get(token_id, (None, None))
             if full is None:
-                variants = self.token_analysis.analysis[analyzer_id].get_variants_ascii(norm_name)
+                variants = analyzer.get_variants_ascii(norm_name)
                 if not variants:
                     continue
 
                 with self.conn.cursor() as cur:
-                    cur.execute("SELECT (getorcreate_full_word(%s, %s)).*",
+                    cur.execute("SELECT * FROM getorcreate_full_word(%s, %s)",
                                 (token_id, variants))
                     full, part = cur.fetchone()
 
@@ -498,94 +643,122 @@ class LegacyICUNameAnalyzer(AbstractAnalyzer):
         return full_tokens, partial_tokens
 
 
-    def _add_postcode(self, postcode):
+    def _add_postcode(self, item):
         """ Make sure the normalized postcode is present in the word table.
         """
-        if re.search(r'[:,;]', postcode) is None:
-            postcode = self.normalize_postcode(postcode)
+        analyzer = self.token_analysis.analysis.get('@postcode')
 
-            if postcode not in self._cache.postcodes:
-                term = self._search_normalized(postcode)
-                if not term:
-                    return
+        if analyzer is None:
+            postcode_name = item.name.strip().upper()
+            variant_base = None
+        else:
+            postcode_name = analyzer.normalize(item.name)
+            variant_base = item.get_attr("variant")
 
-                with self.conn.cursor() as cur:
-                    # no word_id needed for postcodes
-                    cur.execute("""INSERT INTO word (word_token, type, word)
-                                   (SELECT %s, 'P', pc FROM (VALUES (%s)) as v(pc)
-                                    WHERE NOT EXISTS
-                                     (SELECT * FROM word
-                                      WHERE type = 'P' and word = pc))
-                                """, (term, postcode))
-                self._cache.postcodes.add(postcode)
+        if variant_base:
+            postcode = f'{postcode_name}@{variant_base}'
+        else:
+            postcode = postcode_name
 
+        if postcode not in self._cache.postcodes:
+            term = self._search_normalized(postcode_name)
+            if not term:
+                return None
 
-    @staticmethod
-    def _split_housenumbers(hnrs):
-        if len(hnrs) > 1 or ',' in hnrs[0] or ';' in hnrs[0]:
-            # split numbers if necessary
-            simple_list = []
-            for hnr in hnrs:
-                simple_list.extend((x.strip() for x in re.split(r'[;,]', hnr)))
-
-            if len(simple_list) > 1:
-                hnrs = list(set(simple_list))
-            else:
-                hnrs = simple_list
-
-        return hnrs
+            variants = {term}
+            if analyzer is not None and variant_base:
+                variants.update(analyzer.get_variants_ascii(variant_base))
 
+            with self.conn.cursor() as cur:
+                cur.execute("SELECT create_postcode_word(%s, %s)",
+                            (postcode, list(variants)))
+            self._cache.postcodes.add(postcode)
 
+        return postcode_name
 
 
 class _TokenInfo:
     """ Collect token information to be sent back to the database.
     """
-    def __init__(self, cache):
-        self._cache = cache
-        self.data = {}
+    def __init__(self):
+        self.names = None
+        self.housenumbers = set()
+        self.housenumber_tokens = set()
+        self.street_tokens = set()
+        self.place_tokens = set()
+        self.address_tokens = {}
+        self.postcode = None
+
 
     @staticmethod
     def _mk_array(tokens):
-        return '{%s}' % ','.join((str(s) for s in tokens))
+        return f"{{{','.join((str(s) for s in tokens))}}}"
+
+
+    def to_dict(self):
+        """ Return the token information in database importable format.
+        """
+        out = {}
+
+        if self.names:
+            out['names'] = self.names
+
+        if self.housenumbers:
+            out['hnr'] = ';'.join(self.housenumbers)
+            out['hnr_tokens'] = self._mk_array(self.housenumber_tokens)
+
+        if self.street_tokens:
+            out['street'] = self._mk_array(self.street_tokens)
+
+        if self.place_tokens:
+            out['place'] = self._mk_array(self.place_tokens)
+
+        if self.address_tokens:
+            out['addr'] = self.address_tokens
 
+        if self.postcode:
+            out['postcode'] = self.postcode
 
-    def add_names(self, fulls, partials):
+        return out
+
+
+    def set_names(self, fulls, partials):
         """ Adds token information for the normalised names.
         """
-        self.data['names'] = self._mk_array(itertools.chain(fulls, partials))
+        self.names = self._mk_array(itertools.chain(fulls, partials))
 
 
-    def add_housenumbers(self, conn, hnrs):
+    def add_housenumber(self, token, hnr):
         """ Extract housenumber information from a list of normalised
             housenumbers.
         """
-        self.data['hnr_tokens'] = self._mk_array(self._cache.get_hnr_tokens(conn, hnrs))
-        self.data['hnr'] = ';'.join(hnrs)
+        if token:
+            self.housenumbers.add(hnr)
+            self.housenumber_tokens.add(token)
 
 
     def add_street(self, tokens):
         """ Add addr:street match terms.
         """
-        if tokens:
-            self.data['street'] = self._mk_array(tokens)
+        self.street_tokens.update(tokens)
 
 
     def add_place(self, tokens):
         """ Add addr:place search and match terms.
         """
-        if tokens:
-            self.data['place'] = self._mk_array(tokens)
+        self.place_tokens.update(tokens)
 
 
-    def add_address_terms(self, terms):
+    def add_address_term(self, key, partials):
         """ Add additional address terms.
         """
-        tokens = {key: self._mk_array(partials)
-                  for key, partials in terms if partials}
+        if partials:
+            self.address_tokens[key] = self._mk_array(partials)
 
-        if tokens:
-            self.data['addr'] = tokens
+    def set_postcode(self, postcode):
+        """ Set the postcode to the given one.
+        """
+        self.postcode = postcode
 
 
 class _TokenCache:
@@ -597,31 +770,6 @@ class _TokenCache:
     def __init__(self):
         self.names = {}
         self.partials = {}
+        self.fulls = {}
         self.postcodes = set()
         self.housenumbers = {}
-
-
-    def get_hnr_tokens(self, conn, terms):
-        """ Get token ids for a list of housenumbers, looking them up in the
-            database if necessary. `terms` is an iterable of normalized
-            housenumbers.
-        """
-        tokens = []
-        askdb = []
-
-        for term in terms:
-            token = self.housenumbers.get(term)
-            if token is None:
-                askdb.append(term)
-            else:
-                tokens.append(token)
-
-        if askdb:
-            with conn.cursor() as cur:
-                cur.execute("SELECT nr, getorcreate_hnr_id(nr) FROM unnest(%s) as nr",
-                            (askdb, ))
-                for term, tid in cur:
-                    self.housenumbers[term] = tid
-                    tokens.append(tid)
-
-        return tokens