feat(parser): enhance hybrid model support with vector names

docs/collections.md

@@ -91,8 +91,9 @@ Explicitly creates a new empty collection. Collections are also created automati
 CREATE COLLECTION <collection_name>
 CREATE COLLECTION <collection_name> HYBRID
 CREATE COLLECTION <collection_name> USING MODEL '<model_name>'
+CREATE COLLECTION <collection_name> USING VECTOR '<dense_vector_name>'
 CREATE COLLECTION <collection_name> USING HYBRID
-CREATE COLLECTION <collection_name> USING HYBRID DENSE MODEL '<model>'
+CREATE COLLECTION <collection_name> USING HYBRID [DENSE MODEL '<model>'] [DENSE VECTOR '<name>'] [SPARSE VECTOR '<name>']
 CREATE COLLECTION <collection_name> WITH VECTORS { on_disk: <bool> }
 CREATE COLLECTION <collection_name> WITH HNSW { m, ef_construct, full_scan_threshold, max_indexing_threads, on_disk, payload_m, inline_storage }
 CREATE COLLECTION <collection_name> WITH OPTIMIZERS { deleted_threshold, vacuum_min_vector_number, default_segment_number, max_segment_size, memmap_threshold, indexing_threshold, flush_interval_sec, max_optimization_threads, prevent_unoptimized }
@@ -117,6 +118,11 @@ Dense-only collection (standard, uses default model dimensions):
 CREATE COLLECTION research_papers
 ```
 
+QQL-created dense collections use the configured dense vector name (`dense` by default). You can choose a different name explicitly:
+```sql
+CREATE COLLECTION research_papers USING VECTOR 'body'
+```
+
 Dense-only collection pinned to a specific model (768-dimensional):
 ```sql
 CREATE COLLECTION research_papers USING MODEL 'BAAI/bge-base-en-v1.5'
@@ -127,6 +133,11 @@ Hybrid collection (dense + sparse BM25, default models):
 CREATE COLLECTION research_papers HYBRID
 ```
 
+Hybrid collection with explicit vector names:
+```sql
+CREATE COLLECTION research_papers USING HYBRID DENSE VECTOR 'emb' SPARSE VECTOR 'lex'
+```
+
 Hybrid collection with a custom dense model:
 ```sql
 CREATE COLLECTION research_papers USING HYBRID DENSE MODEL 'BAAI/bge-base-en-v1.5'
@@ -150,6 +161,8 @@ QQL supports the same config blocks on both `CREATE COLLECTION` and `ALTER COLLE
 - `WITH PARAMS { replication_factor, write_consistency_factor, read_fan_out_factor, read_fan_out_delay_ms, on_disk_payload }` on alter
 - `ALTER COLLECTION ... QUANTIZE ...` supports the same quantization forms as create, plus `QUANTIZE DISABLED`
 
+`ALTER COLLECTION ... WITH VECTORS { ... }` can update unnamed collections or named collections with one dense vector. Collections with multiple dense vectors are rejected because this syntax has no vector-name target.
+
 Example:
 
 ```sql
@@ -380,6 +393,7 @@ Replaces the stored dense vector for a **single point** identified by its ID. Th
 ```
 UPDATE <collection> SET VECTOR WHERE id = '<point_id>' [<vector>]
 UPDATE <collection> SET VECTOR WHERE id = <integer_id>  [<vector>]
+UPDATE <collection> SET VECTOR '<dense_vector_name>' WHERE id = '<point_id>' [<vector>]
 ```
 
 The vector is provided as a JSON-style float array `[v1, v2, ..., vN]`. The array length must match the collection's configured vector dimensions.
@@ -392,13 +406,17 @@ UPDATE articles SET VECTOR WHERE id = '3f2e1a4b-8c91-4d0e-b123-abc123def456' [0.
 
 -- Replace vector by integer ID
 UPDATE articles SET VECTOR WHERE id = 42 [0.1, 0.2, 0.3, 0.4]
+
+-- Replace a specific named vector
+UPDATE articles SET VECTOR 'body' WHERE id = '3f2e1a4b-8c91-4d0e-b123-abc123def456' [0.1, 0.2, 0.3, 0.4]
 ```
 
 **Notes:**
 - Only single-point updates are supported (by ID). Bulk or filter-based vector updates are not supported.
 - The point must already exist; this operation does not create new points.
 - The collection must exist; updating from a non-existent collection raises an error.
-- For hybrid collections, the dense vector named `"dense"` is updated. Sparse vectors are managed separately.
+- For named-vector collections, QQL updates the only dense vector when the target is unambiguous. Use `SET VECTOR '<name>'` when a collection has multiple dense vectors.
+- Sparse vectors are managed separately.
 
 ---
 

docs/insert.md

@@ -16,8 +16,9 @@ If you include an `id` field in `VALUES`, QQL uses it as the Qdrant point ID. Su
 ```
 INSERT INTO COLLECTION <collection_name> VALUES {<dict>}
 INSERT INTO COLLECTION <collection_name> VALUES {<dict>} USING MODEL '<model_name>'
+INSERT INTO COLLECTION <collection_name> VALUES {<dict>} USING VECTOR '<dense_vector_name>'
 INSERT INTO COLLECTION <collection_name> VALUES {<dict>} USING HYBRID
-INSERT INTO COLLECTION <collection_name> VALUES {<dict>} USING HYBRID DENSE MODEL '<model>' SPARSE MODEL '<model>'
+INSERT INTO COLLECTION <collection_name> VALUES {<dict>} USING HYBRID [DENSE MODEL '<model>'] [DENSE VECTOR '<name>'] [SPARSE MODEL '<model>'] [SPARSE VECTOR '<name>']
 ```
 
 **Examples:**
@@ -49,6 +50,17 @@ Insert into a hybrid collection (dense + sparse BM25 vectors):
 INSERT INTO COLLECTION articles VALUES {'text': 'Attention is all you need'} USING HYBRID
 ```
 
+Insert into a specific named dense vector:
+```sql
+INSERT INTO COLLECTION articles VALUES {'text': 'hello world'} USING VECTOR 'body'
+```
+
+Insert into a hybrid collection with external vector names:
+```sql
+INSERT INTO COLLECTION articles VALUES {'text': 'hello world'}
+  USING HYBRID DENSE VECTOR 'emb' SPARSE VECTOR 'lex'
+```
+
 Insert with custom models for both dense and sparse:
 ```sql
 INSERT INTO COLLECTION articles VALUES {'text': 'hello world'}
@@ -67,6 +79,7 @@ INSERT INTO COLLECTION articles VALUES {'text': 'hello world'}
 - `id`, when provided, must be an unsigned integer or UUID string.
 - If the collection already exists with a different vector size (from a different model), an error is raised with a clear message.
 - Hybrid inserts require a hybrid collection (created with `CREATE COLLECTION ... HYBRID`, auto-created on the first `USING HYBRID` insert, or **auto-detected** — if you omit `USING HYBRID` but the target collection is already a hybrid collection, QQL detects this and uses the hybrid insert path automatically).
+- If a collection has multiple dense or sparse vectors, specify the target vector names explicitly.
 
 ---
 
@@ -82,8 +95,9 @@ Each record may optionally include an `id` field. This is the preferred way to k
 ```
 INSERT BULK INTO COLLECTION <collection_name> VALUES [<dict>, <dict>, ...]
 INSERT BULK INTO COLLECTION <collection_name> VALUES [<dict>, ...] USING MODEL '<model_name>'
+INSERT BULK INTO COLLECTION <collection_name> VALUES [<dict>, ...] USING VECTOR '<dense_vector_name>'
 INSERT BULK INTO COLLECTION <collection_name> VALUES [<dict>, ...] USING HYBRID
-INSERT BULK INTO COLLECTION <collection_name> VALUES [<dict>, ...] USING HYBRID DENSE MODEL '<model>' SPARSE MODEL '<model>'
+INSERT BULK INTO COLLECTION <collection_name> VALUES [<dict>, ...] USING HYBRID [DENSE MODEL '<model>'] [DENSE VECTOR '<name>'] [SPARSE MODEL '<model>'] [SPARSE VECTOR '<name>']
 ```
 
 **Examples:**

docs/programmatic.md

@@ -139,7 +139,7 @@ with Connection("http://localhost:6333") as conn:
     # Inspect collection diagnostics
     result = conn.run_query("SHOW COLLECTION notes")
     print(result.data["topology"])         # "dense" or "hybrid"
-    print(result.data["vectors"])          # {"": {...}} or {"dense": {...}}
+    print(result.data["vectors"])          # named vectors, or {"": {...}} for unnamed external collections
     print(result.data["payload_schema"])   # field index info, or None
 ```
 
@@ -150,6 +150,8 @@ with Connection("http://localhost:6333") as conn:
 | `url` | `str` | `"http://localhost:6333"` | Qdrant instance URL |
 | `secret` | `str \| None` | `None` | API key; `None` for unauthenticated |
 | `default_model` | `str \| None` | `None` → `sentence-transformers/all-MiniLM-L6-v2` | Dense embedding model used when no `USING MODEL` clause is given |
+| `default_dense_vector_name` | `str` | `"dense"` | Dense vector name used when QQL creates a collection and no explicit `USING VECTOR` name is given |
+| `default_sparse_vector_name` | `str` | `"sparse"` | Sparse vector name used when QQL creates a hybrid collection and no explicit sparse vector name is given |
 
 ### Power-user: `executor` property
 

docs/reference.md

@@ -33,6 +33,10 @@ Qdrant/bm25
 INSERT INTO docs VALUES {'text': 'hello'} USING MODEL 'BAAI/bge-small-en-v1.5'
 SEARCH docs SIMILAR TO 'hello' LIMIT 5 USING MODEL 'BAAI/bge-small-en-v1.5'
 
+-- Explicit vector names
+INSERT INTO docs VALUES {'text': 'hello'} USING VECTOR 'body'
+SEARCH docs SIMILAR TO 'hello' LIMIT 5 USING VECTOR 'body'
+
 -- Hybrid with custom dense model
 SEARCH docs SIMILAR TO 'hello' LIMIT 5 USING HYBRID DENSE MODEL 'BAAI/bge-base-en-v1.5'
 
@@ -42,6 +46,10 @@ SEARCH docs SIMILAR TO 'hello' LIMIT 5 USING HYBRID FUSION 'dbsf'
 -- Hybrid with both custom
 SEARCH docs SIMILAR TO 'hello' LIMIT 5
   USING HYBRID DENSE MODEL 'BAAI/bge-base-en-v1.5' SPARSE MODEL 'prithivida/Splade_PP_en_v1'
+
+-- Hybrid with external vector names
+SEARCH docs SIMILAR TO 'hello' LIMIT 5
+  USING HYBRID DENSE VECTOR 'emb' SPARSE VECTOR 'lex'
 ```
 
 ### Commonly available dense models (Fastembed)

docs/scripts.md

@@ -120,7 +120,7 @@ Done. 41 point(s) written.
 --             configured model (see: qql connect).
 -- ============================================================
 
-CREATE COLLECTION medical_records HYBRID
+CREATE COLLECTION medical_records USING HYBRID DENSE VECTOR 'dense' SPARSE VECTOR 'sparse'
 
 -- Batch 1 / 1  (records 1–41)
 INSERT BULK INTO COLLECTION medical_records VALUES [
@@ -132,7 +132,7 @@ INSERT BULK INTO COLLECTION medical_records VALUES [
     'peer_reviewed': true
   },
   ...
-] USING HYBRID
+] USING HYBRID DENSE VECTOR 'dense' SPARSE VECTOR 'sparse'
 
 -- ============================================================
 -- End of dump
@@ -155,8 +155,8 @@ qql execute backup.qql
 
 **Rules and notes:**
 - Points without a `'text'` payload field are **skipped** (counted in the footer comment).
-- Hybrid collections produce `CREATE COLLECTION <name> HYBRID` and `INSERT BULK ... USING HYBRID` statements.
-- Dense collections produce plain `CREATE COLLECTION <name>` and `INSERT BULK` statements.
+- Hybrid collections produce `CREATE COLLECTION <name> USING HYBRID ...` and matching `INSERT BULK ... USING HYBRID ...` statements, including vector names when the source collection uses named vectors.
+- Dense collections produce `CREATE COLLECTION <name> USING VECTOR '<name>'` for named vectors, or plain `CREATE COLLECTION <name>` for unnamed external collections.
 - All payload value types are preserved: strings, integers, floats, booleans (`true`/`false`), `null`, lists, and nested dicts.
 - Re-importing re-embeds all text using your currently configured model — use the same model as the original collection to preserve semantic accuracy.
 - Parent directories of the output path are created automatically.

docs/search.md

@@ -12,10 +12,11 @@ An optional `WHERE` clause filters the candidate set **before** similarity ranki
 ```
 SEARCH <collection_name> SIMILAR TO '<query_text>' LIMIT <n>
 SEARCH <collection_name> SIMILAR TO '<query_text>' LIMIT <n> USING MODEL '<model_name>'
+SEARCH <collection_name> SIMILAR TO '<query_text>' LIMIT <n> USING VECTOR '<dense_vector_name>'
 SEARCH <collection_name> SIMILAR TO '<query_text>' LIMIT <n> [USING MODEL '<model>'] WHERE <filter>
 SEARCH <collection_name> SIMILAR TO '<query_text>' LIMIT <n> USING HYBRID
-SEARCH <collection_name> SIMILAR TO '<query_text>' LIMIT <n> USING HYBRID [FUSION 'rrf|dbsf'] [DENSE MODEL '<model>'] [SPARSE MODEL '<model>'] [WHERE <filter>]
-SEARCH <collection_name> SIMILAR TO '<query_text>' LIMIT <n> USING SPARSE [MODEL '<sparse_model>']
+SEARCH <collection_name> SIMILAR TO '<query_text>' LIMIT <n> USING HYBRID [FUSION 'rrf|dbsf'] [DENSE MODEL '<model>'] [DENSE VECTOR '<name>'] [SPARSE MODEL '<model>'] [SPARSE VECTOR '<name>'] [WHERE <filter>]
+SEARCH <collection_name> SIMILAR TO '<query_text>' LIMIT <n> USING SPARSE [MODEL '<sparse_model>'] [VECTOR '<sparse_vector_name>']
 SEARCH <collection_name> SIMILAR TO '<query_text>' LIMIT <n> EXACT
 SEARCH <collection_name> SIMILAR TO '<query_text>' LIMIT <n> [USING ...] [WHERE <filter>] [RERANK] WITH { hnsw_ef: <n>, exact: true|false, acorn: true|false, indexed_only: true|false, quantization: { ignore: true|false, rescore: true|false, oversampling: <n> }, mmr_diversity: <0..1>, mmr_candidates: <n> }
 SEARCH <collection_name> SIMILAR TO '<query_text>' LIMIT <n> [USING ...] [WHERE <filter>] RERANK [MODEL '<reranker_model>']
@@ -38,7 +39,17 @@ Hybrid search (combines dense semantic + sparse BM25 keyword retrieval via RRF b
 SEARCH articles SIMILAR TO 'attention mechanism' LIMIT 10 USING HYBRID
 ```
 
-Sparse-only search (queries only the `sparse` named vector — useful for pure keyword retrieval):
+Search a specific named dense vector:
+```sql
+SEARCH articles SIMILAR TO 'attention mechanism' LIMIT 10 USING VECTOR 'body'
+```
+
+Hybrid search against external vector names:
+```sql
+SEARCH articles SIMILAR TO 'attention mechanism' LIMIT 10 USING HYBRID DENSE VECTOR 'emb' SPARSE VECTOR 'lex'
+```
+
+Sparse-only search (queries a sparse vector — useful for pure keyword retrieval):
 ```sql
 SEARCH medical_knowledge SIMILAR TO 'beta blocker contraindications' LIMIT 5 USING SPARSE
 ```

src/qql/__init__.py

@@ -5,7 +5,13 @@
 except PackageNotFoundError:
     __version__ = "0.0.0+unknown"
 
-from .config import DEFAULT_MODEL, QQLConfig, load_config
+from .config import (
+    DEFAULT_DENSE_VECTOR_NAME,
+    DEFAULT_MODEL,
+    DEFAULT_SPARSE_VECTOR_NAME,
+    QQLConfig,
+    load_config,
+)
 from .connection import Connection
 from .exceptions import QQLError, QQLRuntimeError, QQLSyntaxError
 from .executor import ExecutionResult, Executor
@@ -15,6 +21,9 @@
 __all__ = [
     "__version__",
     "Connection",
+    "DEFAULT_DENSE_VECTOR_NAME",
+    "DEFAULT_MODEL",
+    "DEFAULT_SPARSE_VECTOR_NAME",
     "QQLConfig",
     "QQLError",
     "QQLRuntimeError",

src/qql/ast_nodes.py

@@ -207,6 +207,8 @@ class InsertStmt:
     model: str | None       # dense model; None → use config default
     hybrid: bool = False            # if True, also embed + store sparse BM25 vector
     sparse_model: str | None = None # sparse model; None → SparseEmbedder.DEFAULT_MODEL
+    dense_vector: str | None = None
+    sparse_vector: str | None = None
 
 
 @dataclass(frozen=True)
@@ -216,6 +218,8 @@ class InsertBulkStmt:
     model: str | None                         # dense model; None → use config default
     hybrid: bool = False
     sparse_model: str | None = None
+    dense_vector: str | None = None
+    sparse_vector: str | None = None
 
 
 @dataclass(frozen=True)
@@ -225,6 +229,8 @@ class CreateCollectionStmt:
     model: str | None = None                  # dense model; None → use config default
     quantization: QuantizationConfig | None = None  # optional QUANTIZE clause
     config: CollectionConfig | None = None
+    dense_vector: str | None = None
+    sparse_vector: str | None = None
 
 
 @dataclass(frozen=True)
@@ -287,6 +293,8 @@ class SearchStmt:
     with_clause: SearchWith | None = None
     group_by: str | None = None             # GROUP BY field name; None → normal flat search
     group_size: int = 3                     # max points per group (ignored when group_by is None)
+    dense_vector: str | None = None
+    sparse_vector: str | None = None
 
 
 @dataclass(frozen=True)
@@ -317,6 +325,7 @@ class UpdateVectorStmt:
     collection: str
     point_id: str | int
     vector: tuple[float, ...]   # dense vector as immutable tuple (frozen=True compatible)
+    vector_name: str | None = None
 
 
 @dataclass(frozen=True)

src/qql/cli.py

@@ -27,7 +27,8 @@
       Insert a point. 'text' is required and auto-vectorized.
       Optional: include [yellow]'id'[/yellow] in VALUES as an integer or UUID
       Optional: [yellow]USING MODEL[/yellow] '<model>'
-      Optional: [yellow]USING HYBRID[/yellow] [DENSE MODEL '<model>'] [SPARSE MODEL '<model>']
+      Optional: [yellow]USING VECTOR[/yellow] '<dense_vector>'
+      Optional: [yellow]USING HYBRID[/yellow] [DENSE MODEL '<model>'] [DENSE VECTOR '<name>'] [SPARSE MODEL '<model>'] [SPARSE VECTOR '<name>']
 
   [yellow]INSERT BULK INTO COLLECTION[/yellow] <name> [yellow]VALUES[/yellow] [{[yellow]'text'[/yellow]: '...', ...}, ...]
       Batch insert multiple points in a single call. Each dict must contain 'text'.
@@ -37,7 +38,8 @@
   [yellow]CREATE COLLECTION[/yellow] <name> [[yellow]HYBRID[/yellow]]
       Create a new collection. Add HYBRID for dense+sparse BM25 vectors.
       Optional: [yellow]USING MODEL[/yellow] '<model>'
-      Optional: [yellow]USING HYBRID[/yellow] [DENSE MODEL '<model>']
+      Optional: [yellow]USING VECTOR[/yellow] '<dense_vector>'
+      Optional: [yellow]USING HYBRID[/yellow] [DENSE MODEL '<model>'] [DENSE VECTOR '<name>'] [SPARSE VECTOR '<name>']
       Optional: [yellow]WITH VECTORS[/yellow] { on_disk: <bool> }
       Optional: [yellow]WITH HNSW[/yellow] { m, ef_construct, full_scan_threshold, max_indexing_threads, on_disk, payload_m, inline_storage }
       Optional: [yellow]WITH OPTIMIZERS[/yellow] { deleted_threshold, vacuum_min_vector_number, default_segment_number, max_segment_size, memmap_threshold, indexing_threshold, flush_interval_sec, max_optimization_threads, prevent_unoptimized }
@@ -87,8 +89,9 @@
   [yellow]SEARCH[/yellow] <name> [yellow]SIMILAR TO[/yellow] '<text>' [yellow]LIMIT[/yellow] <n>
       Semantic search by vector similarity.
       Optional: [yellow]USING MODEL[/yellow] '<model>'
-      Optional: [yellow]USING HYBRID[/yellow] [FUSION 'rrf|dbsf'] [DENSE MODEL '<model>'] [SPARSE MODEL '<model>']
-      Optional: [yellow]USING SPARSE[/yellow] [MODEL '<model>']   sparse-vector-only search
+      Optional: [yellow]USING VECTOR[/yellow] '<dense_vector>'
+      Optional: [yellow]USING HYBRID[/yellow] [FUSION 'rrf|dbsf'] [DENSE MODEL '<model>'] [DENSE VECTOR '<name>'] [SPARSE MODEL '<model>'] [SPARSE VECTOR '<name>']
+      Optional: [yellow]USING SPARSE[/yellow] [MODEL '<model>'] [VECTOR '<name>']   sparse-vector-only search
       Optional: [yellow]WHERE[/yellow] <filter>   (e.g. WHERE year > 2020 AND status = 'ok')
       Optional: [yellow]RERANK[/yellow] [MODEL '<model>']   rerank results with a cross-encoder
       Optional: [yellow]EXACT[/yellow]   bypass HNSW and perform exact search
@@ -107,7 +110,8 @@
   [yellow]DELETE FROM[/yellow] <name> [yellow]WHERE id =[/yellow] '<id>'
       Delete a point by its ID.
 
-  [yellow]UPDATE[/yellow] <name> [yellow]SET VECTOR WHERE id =[/yellow] '<id>'|<int> [<vector>]
+  [yellow]UPDATE[/yellow] <name> [yellow]SET VECTOR[/yellow] [yellow]WHERE id =[/yellow] '<id>'|<int> [<vector>]
+  [yellow]UPDATE[/yellow] <name> [yellow]SET VECTOR[/yellow] '<dense_vector_name>' [yellow]WHERE id =[/yellow] '<id>'|<int> [<vector>]
       Replace the dense vector for a single point by ID.
       The point must already exist. Vector is a float array: [0.1, 0.2, ..., 0.N]
 

src/qql/config.py

@@ -8,13 +8,17 @@
 CONFIG_PATH = CONFIG_DIR / "config.json"
 
 DEFAULT_MODEL = "sentence-transformers/all-MiniLM-L6-v2"
+DEFAULT_DENSE_VECTOR_NAME = "dense"
+DEFAULT_SPARSE_VECTOR_NAME = "sparse"
 
 
 @dataclass
 class QQLConfig:
     url: str
     secret: str | None = None
     default_model: str = DEFAULT_MODEL
+    default_dense_vector_name: str = DEFAULT_DENSE_VECTOR_NAME
+    default_sparse_vector_name: str = DEFAULT_SPARSE_VECTOR_NAME
 
 
 def save_config(cfg: QQLConfig) -> None:
@@ -33,6 +37,12 @@ def load_config() -> QQLConfig | None:
         url=data["url"],
         secret=data.get("secret"),
         default_model=data.get("default_model", DEFAULT_MODEL),
+        default_dense_vector_name=data.get(
+            "default_dense_vector_name", DEFAULT_DENSE_VECTOR_NAME
+        ),
+        default_sparse_vector_name=data.get(
+            "default_sparse_vector_name", DEFAULT_SPARSE_VECTOR_NAME
+        ),
     )