remove postcode computation for word table during import

src/nominatim_db/tokenizer/icu_tokenizer.py

@@ -381,76 +381,15 @@ class ICUNameAnalyzer(AbstractAnalyzer):
         return postcode.strip().upper()
 
     def update_postcodes_from_db(self) -> None:
-        """ Update postcode tokens in the word table from the location_postcode
+        """ Postcode update.
-            table.
+
+            Removes all postcodes from the word table because they are not
+            needed. Postcodes are recognised by pattern.
         """
         assert self.conn is not None
-        analyzer = self.token_analysis.analysis.get('@postcode')
 
         with self.conn.cursor() as cur:
-            # First get all postcode names currently in the word table.
+            cur.execute("DELETE FROM word WHERE type = 'P'")
-            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.get_canonical_id(place)
-                            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: Iterable[str]) -> None:
-        assert self.conn is not None
-        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: Iterable[str]) -> None:
-        assert self.conn is not None
-        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)
-                if analyzer is None:
-                    variants = [term]
-                else:
-                    variants = analyzer.compute_variants(variant)
-                    if term not in variants:
-                        variants.append(term)
-            else:
-                variants = [self._search_normalized(postcode_name)]
-            terms.append((postcode_name, variants))
-
-        if terms:
-            with self.conn.cursor() as cur:
-                cur.executemany("""SELECT create_postcode_word(%s, %s)""", terms)
 
     def update_special_phrases(self, phrases: Iterable[Tuple[str, str, str, str]],
                                should_replace: bool) -> None:
@@ -718,32 +657,9 @@ class ICUNameAnalyzer(AbstractAnalyzer):
         analyzer = self.token_analysis.analysis.get('@postcode')
 
         if analyzer is None:
-            postcode_name = item.name.strip().upper()
+            return item.name.strip().upper()
-            variant_base = None
         else:
-            postcode_name = analyzer.get_canonical_id(item)
+            return analyzer.get_canonical_id(item)
-            variant_base = item.get_attr("variant")
-
-        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
-
-            variants = {term}
-            if analyzer is not None and variant_base:
-                variants.update(analyzer.compute_variants(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:
@@ -836,5 +752,4 @@ class _TokenCache:
         self.names: Dict[str, Tuple[int, List[int]]] = {}
         self.partials: Dict[str, int] = {}
         self.fulls: Dict[str, List[int]] = {}
-        self.postcodes: Set[str] = set()
         self.housenumbers: Dict[str, Tuple[Optional[int], Optional[str]]] = {}

test/python/api/search/test_icu_query_analyzer.py

@@ -102,12 +102,11 @@ async def test_splitting_in_transliteration(conn):
 
 @pytest.mark.asyncio
 @pytest.mark.parametrize('term,order', [('23456', ['P', 'H', 'W', 'w']),
-                                        ('3', ['H', 'P', 'W', 'w'])
+                                        ('3', ['H', 'W', 'w'])
                                        ])
 async def test_penalty_postcodes_and_housenumbers(conn, term, order):
     ana = await tok.create_query_analyzer(conn)
 
-    await add_word(conn, 1, term, 'P', None)
     await add_word(conn, 2, term, 'H', term)
     await add_word(conn, 3, term, 'w', term)
     await add_word(conn, 4, term, 'W', term)
@@ -179,8 +178,10 @@ async def test_add_unknown_housenumbers(conn):
     assert query.nodes[1].starting[0].ttype == qmod.TOKEN_HOUSENUMBER
     assert len(query.nodes[1].starting[0].tokens) == 1
     assert query.nodes[1].starting[0].tokens[0].token == 1
-    assert not query.nodes[2].starting
+    assert query.nodes[2].has_tokens(3, qmod.TOKEN_POSTCODE)
-    assert not query.nodes[3].starting
+    assert not query.nodes[2].has_tokens(3, qmod.TOKEN_HOUSENUMBER)
+    assert not query.nodes[2].has_tokens(4, qmod.TOKEN_HOUSENUMBER)
+    assert not query.nodes[3].has_tokens(4, qmod.TOKEN_HOUSENUMBER)
 
 
 @pytest.mark.asyncio

test/python/tokenizer/test_icu.py

@@ -265,37 +265,13 @@ class TestPostcodes:
                                                       'address': {'postcode': postcode}}))
 
 
-    def test_update_postcodes_from_db_empty(self, table_factory, word_table):
+    def test_update_postcodes_deleted(self, word_table):
-        table_factory('location_postcode', 'country_code TEXT, postcode TEXT',
-                      content=(('de', '12345'), ('se', '132 34'),
-                               ('bm', 'AB23'), ('fr', '12345')))
-
-        self.analyzer.update_postcodes_from_db()
-
-        assert word_table.count() == 5
-        assert word_table.get_postcodes() == {'12345', '132 34@132 34', 'AB 23@AB 23'}
-
-
-    def test_update_postcodes_from_db_ambigious(self, table_factory, word_table):
-        table_factory('location_postcode', 'country_code TEXT, postcode TEXT',
-                      content=(('in', '123456'), ('sg', '123456')))
-
-        self.analyzer.update_postcodes_from_db()
-
-        assert word_table.count() == 3
-        assert word_table.get_postcodes() == {'123456', '123456@123 456'}
-
-
-    def test_update_postcodes_from_db_add_and_remove(self, table_factory, word_table):
-        table_factory('location_postcode', 'country_code TEXT, postcode TEXT',
-                      content=(('ch', '1234'), ('bm', 'BC 45'), ('bm', 'XX45')))
         word_table.add_postcode(' 1234', '1234')
         word_table.add_postcode(' 5678', '5678')
 
         self.analyzer.update_postcodes_from_db()
 
-        assert word_table.count() == 5
+        assert word_table.count() == 0
-        assert word_table.get_postcodes() == {'1234', 'BC 45@BC 45', 'XX 45@XX 45'}
 
 
     def test_process_place_postcode_simple(self, word_table):
@@ -303,16 +279,12 @@ class TestPostcodes:
 
         assert info['postcode'] == '12345'
 
-        assert word_table.get_postcodes() == {'12345', }
-
 
     def test_process_place_postcode_with_space(self, word_table):
         info = self.process_postcode('in', '123 567')
 
         assert info['postcode'] == '123567'
 
-        assert word_table.get_postcodes() == {'123567@123 567', }
-
 
 
 def test_update_special_phrase_empty_table(analyzer, word_table):
@@ -477,9 +449,9 @@ class TestPlaceAddress:
 
     @pytest.mark.parametrize('pcode', ['12345', 'AB 123', '34-345'])
     def test_process_place_postcode(self, word_table, pcode):
-        self.process_address(postcode=pcode)
+        info = self.process_address(postcode=pcode)
 
-        assert word_table.get_postcodes() == {pcode, }
+        assert info['postcode'] == pcode
 
 
     @pytest.mark.parametrize('hnr', ['123a', '1', '101'])