updates

ARCHITECTURE.md

@@ -1,5 +1,43 @@
 ## `vec0`
 
+### Shadow Tables
+
+#### `xyz_chunks`
+
+- `chunk_id INTEGER`
+- `size INTEGER`
+- `validity BLOB`
+- `rowids BLOB`
+
+
+#### `xyz_rowids`
+
+- `rowid INTEGER`
+- `id`
+- `chunk_id INTEGER`
+- `chunk_offset INTEGER`
+
+#### `xyz_vector_chunksNN`
+
+- `rowid INTEGER`
+- `vector BLOB`
+
+#### `xyz_auxiliary`
+
+- `rowid INTEGER`
+- `valueNN [type]`
+
+#### `xyz_metadata_chunksNN`
+
+- `rowid INTEGER`
+- `data BLOB`
+
+
+#### `xyz_metadata_text_data_00`
+
+- `rowid INTEGER`
+- `data TEXT`
+
 ### idxStr
 
 The `vec0` idxStr is a string composed of single "header" character and 0 or

sqlite-vec.c

@@ -5719,6 +5719,41 @@ int min_idx(const f32 *distances, i32 n, u8 *candidates, i32 *out, i32 k,
   return SQLITE_OK;
 }
 
+int vec0_get_metadata_text_long_value(
+  vec0_vtab * p,
+  sqlite3_stmt ** stmt,
+  int metadata_idx,
+  i64 rowid,
+  int *n,
+  char ** s) {
+  int rc;
+  if(!(*stmt)) {
+    const char * zSql = sqlite3_mprintf("select data from " VEC0_SHADOW_METADATA_TEXT_DATA_NAME " where rowid = ?", p->schemaName, p->tableName, metadata_idx);
+    if(!zSql) {
+      rc = SQLITE_NOMEM;
+      goto done;
+    }
+    rc = sqlite3_prepare_v2(p->db, zSql, -1, stmt, NULL);
+    sqlite3_free( (void *) zSql);
+    if(rc != SQLITE_OK) {
+      goto done;
+    }
+  }
+
+  sqlite3_reset(*stmt);
+  sqlite3_bind_int64(*stmt, 1, rowid);
+  rc = sqlite3_step(*stmt);
+  if(rc != SQLITE_ROW) {
+    rc = SQLITE_ERROR;
+    goto done;
+  }
+  *s = (char *) sqlite3_column_text(*stmt, 0);
+  *n = sqlite3_column_bytes(*stmt, 0);
+  rc = SQLITE_OK;
+  done:
+    return rc;
+}
+
 /**
  * @brief Crete at "iterator" (sqlite3_stmt) of chunks with the given constraints
  *
@@ -5845,6 +5880,28 @@ int vec0_set_metadata_filter_bitmap(
   if(rc != SQLITE_OK) {
     return rc;
   }
+  // TODO: only on text columns
+  sqlite3_blob * rowidsBlob;
+  rc = sqlite3_blob_open(p->db, p->schemaName, p->shadowChunksName, "rowids", chunk_rowid, 0, &rowidsBlob);
+  if(rc != SQLITE_OK) {
+    return rc;
+  }
+  assert(sqlite3_blob_bytes(rowidsBlob) % sizeof(i64) == 0);
+  assert((sqlite3_blob_bytes(rowidsBlob) / sizeof(i64)) == size);
+  i64 * rowids;
+  rowids = sqlite3_malloc(sqlite3_blob_bytes(rowidsBlob));
+  if(!rowids) {
+    sqlite3_blob_close(rowidsBlob);
+    return SQLITE_NOMEM;
+  }
+
+  rc = sqlite3_blob_read(rowidsBlob, rowids, sqlite3_blob_bytes(rowidsBlob), 0);
+  if(rc != SQLITE_OK) {
+    sqlite3_blob_close(rowidsBlob);
+    return rc;
+  }
+  sqlite3_blob_close(rowidsBlob);
+
   vec0_metadata_column_kind kind = p->metadata_columns[metadata_idx].kind;
   int szMatch = 0;
   int blobSize = sqlite3_blob_bytes(blob);
@@ -5951,25 +6008,41 @@ int vec0_set_metadata_filter_bitmap(
       break;
     }
     case VEC0_METADATA_COLUMN_KIND_TEXT: {
-      // TODO: handle large strings. For now just raise a generic error
-      for(int i = 0; i < size; i++) {
-        u8 * view = &((u8*) buffer)[i * VEC0_METADATA_TEXT_VIEW_BUFFER_LENGTH];
-        int n = ((int*) view)[0];
-        if(n > 12) {
-          rc = SQLITE_ERROR;
-          goto done;
-        }
-      }
       const char * target = (const char *) sqlite3_value_text(value);
+      int targetn = sqlite3_value_bytes(value);
 
       switch(op) {
         case VEC0_METADATA_OPERATOR_EQ: {
+          sqlite3_stmt * stmt = NULL;
           for(int i = 0; i < size; i++) {
             u8 * view = &((u8*) buffer)[i * VEC0_METADATA_TEXT_VIEW_BUFFER_LENGTH];
             int n = ((int*) view)[0];
             char * s = (char *) &view[4];
-            bitmap_set(b, i, strncmp(s, target, n) == 0);
+            if(n != targetn) {
+              bitmap_set(b, i, 0);
+              continue;
+            }
+            int prefix_cmp = strncmp(s, target, min(n, 12));
+            if(n <= 12) {
+              bitmap_set(b, i, prefix_cmp == 0);
+            }
+            // if the prefix doesnt match, the rest of the string wont match
+            else if(prefix_cmp) {
+              bitmap_set(b, i, 0);
+            }
+            // need to consult
+            else {
+              char *slong;
+              int slongn;
+              rc = vec0_get_metadata_text_long_value(p, &stmt, metadata_idx, rowids[i], &slongn, &slong);
+              if(rc != SQLITE_OK) {
+                goto done;
+              }
+              assert(n == slongn);
+              bitmap_set(b, i, strncmp(slong, target, n) == 0);
+            }
           }
+          sqlite3_finalize(stmt);
           break;
         }
         case VEC0_METADATA_OPERATOR_NE: {
@@ -5977,6 +6050,7 @@ int vec0_set_metadata_filter_bitmap(
             u8 * view = &((u8*) buffer)[i * VEC0_METADATA_TEXT_VIEW_BUFFER_LENGTH];
             int n = ((int*) view)[0];
             char * s = (char *) &view[4];
+            if(n > 12) {rc = SQLITE_ERROR;goto done;} /* TODO */
             bitmap_set(b, i, strncmp(s, target, n) != 0);
           }
           break;
@@ -5986,6 +6060,7 @@ int vec0_set_metadata_filter_bitmap(
             u8 * view = &((u8*) buffer)[i * VEC0_METADATA_TEXT_VIEW_BUFFER_LENGTH];
             int n = ((int*) view)[0];
             char * s = (char *) &view[4];
+            if(n > 12) {rc = SQLITE_ERROR;goto done;} /* TODO */
             bitmap_set(b, i, strncmp(s, target, n) > 0);
           }
           break;
@@ -5995,6 +6070,7 @@ int vec0_set_metadata_filter_bitmap(
             u8 * view = &((u8*) buffer)[i * VEC0_METADATA_TEXT_VIEW_BUFFER_LENGTH];
             int n = ((int*) view)[0];
             char * s = (char *) &view[4];
+            if(n > 12) {rc = SQLITE_ERROR;goto done;} /* TODO */
             bitmap_set(b, i, strncmp(s, target, n) >= 0);
           }
           break;
@@ -6004,6 +6080,7 @@ int vec0_set_metadata_filter_bitmap(
             u8 * view = &((u8*) buffer)[i * VEC0_METADATA_TEXT_VIEW_BUFFER_LENGTH];
             int n = ((int*) view)[0];
             char * s = (char *) &view[4];
+            if(n > 12) {rc = SQLITE_ERROR;goto done;} /* TODO */
             bitmap_set(b, i, strncmp(s, target, n) <= 0);
           }
           break;
@@ -6013,6 +6090,7 @@ int vec0_set_metadata_filter_bitmap(
             u8 * view = &((u8*) buffer)[i * VEC0_METADATA_TEXT_VIEW_BUFFER_LENGTH];
             int n = ((int*) view)[0];
             char * s = (char *) &view[4];
+            if(n > 12) {rc = SQLITE_ERROR;goto done;} /* TODO */
             bitmap_set(b, i, strncmp(s, target, n) < 0);
           }
           break;
@@ -6024,6 +6102,7 @@ int vec0_set_metadata_filter_bitmap(
   }
   done:
     sqlite3_free(buffer);
+    sqlite3_free(rowids);
     return rc;
 }
 

tests/__snapshots__/test-metadata.ambr

@@ -617,10 +617,28 @@
     ]),
   })
 # ---
+# name: test_long_text_knn[knn-eq-short]
+  OrderedDict({
+    'sql': "select * from v where vector match X'11111111' and k = 5 and name = ?",
+    'rows': list([
+      OrderedDict({
+        'rowid': 1,
+        'vector': b'\x11\x11\x11\x11',
+        'name': 'aaaaaaaaaaaa',
+      }),
+    ]),
+  })
+# ---
 # name: test_long_text_knn[knn-eq-true]
-  dict({
-    'error': 'OperationalError',
-    'message': 'Could not filter metadata fields',
+  OrderedDict({
+    'sql': "select * from v where vector match X'11111111' and k = 5 and name = ?",
+    'rows': list([
+      OrderedDict({
+        'rowid': 3,
+        'vector': b'\x11\x11\x11\x11',
+        'name': 'aaaaaaaaaaaa_aaa',
+      }),
+    ]),
   })
 # ---
 # name: test_long_text_updates
@@ -1416,7 +1434,6 @@
 # name: test_stress.1
   OrderedDict({
     'sql': '''
-      
                 select
                   movie_id,
                   title,
@@ -1431,7 +1448,6 @@
                   and num_reviews between 100 and 500
                   and mean_rating > 3.5
                   and k = 5;
-              
     ''',
     'rows': list([
       OrderedDict({

tests/afbd/test-afbd.py

@@ -119,7 +119,7 @@ def tests_command(file_path):
 
     tests = [
         json.loads(row["data"])
-        for row in db.execute("select data from tests limit 2000").fetchall()
+        for row in db.execute("select data from tests").fetchall()
     ]
 
     num_or_skips = 0
@@ -179,8 +179,8 @@ def tests_command(file_path):
                     == diff["values_changed"][bkey]["new_value"]
                 )
             elif len(keys_changed) == 1:
-                v = int(akey.lstrip("root[").rstrip("]"))
-                assert v == len(expected_closest_ids)
+                v = int(keys_changed[0].lstrip("root[").rstrip("]"))
+                assert (v + 1) == len(expected_closest_ids)
             else:
                 raise Exception("fuck")
             num_1off_errors += 1

tests/test-metadata.py

@@ -148,10 +148,17 @@ def test_long_text_knn(db, snapshot):
         "create virtual table v using vec0(vector float[1], name text, chunk_size=8)"
     )
     INSERT = "insert into v(vector, name) values (?, ?)"
+    exec(db, INSERT, [b"\x11\x11\x11\x11", "aaaaaaaaaaaa"])
+    exec(db, INSERT, [b"\x11\x11\x11\x11", "bbbbbbbbbbbb"])
     exec(db, INSERT, [b"\x11\x11\x11\x11", "aaaaaaaaaaaa_aaa"])
     exec(db, INSERT, [b"\x11\x11\x11\x11", "aaaaaaaaaaaa_bbb"])
     exec(db, INSERT, [b"\x11\x11\x11\x11", "aaaaaaaaaaaa_ccc"])
 
+    assert exec(
+        db,
+        "select * from v where vector match X'11111111' and k = 5 and name = ?",
+        ["aaaaaaaaaaaa"],
+    ) == snapshot(name="knn-eq-short")
     assert exec(
         db,
         "select * from v where vector match X'11111111' and k = 5 and name = ?",