No dimensions

src/hnsw.c

@@ -33,12 +33,6 @@ HnswInit(void)
 					  HNSW_DEFAULT_EF_CONSTRUCTION, HNSW_MIN_EF_CONSTRUCTION, HNSW_MAX_EF_CONSTRUCTION
 #if PG_VERSION_NUM >= 130000
 					  ,AccessExclusiveLock
-#endif
-		);
-	add_int_reloption(hnsw_relopt_kind, "dimensions", "Number of dimensions",
-					  HNSW_DEFAULT_DIMENSIONS, HNSW_MIN_DIMENSIONS, HNSW_MAX_DIMENSIONS
-#if PG_VERSION_NUM >= 130000
-					  ,AccessExclusiveLock
 #endif
 		);
 
@@ -131,7 +125,6 @@ hnswoptions(Datum reloptions, bool validate)
 	static const relopt_parse_elt tab[] = {
 		{"m", RELOPT_TYPE_INT, offsetof(HnswOptions, m)},
 		{"ef_construction", RELOPT_TYPE_INT, offsetof(HnswOptions, efConstruction)},
-		{"dimensions", RELOPT_TYPE_INT, offsetof(HnswOptions, dimensions)},
 	};
 
 #if PG_VERSION_NUM >= 130000

src/hnsw.h

@@ -42,9 +42,6 @@
 #define HNSW_DEFAULT_EF_SEARCH	40
 #define HNSW_MIN_EF_SEARCH		1
 #define HNSW_MAX_EF_SEARCH		1000
-#define HNSW_DEFAULT_DIMENSIONS	-1
-#define HNSW_MIN_DIMENSIONS		1
-#define HNSW_MAX_DIMENSIONS		HNSW_MAX_DIM
 
 /* Tuple types */
 #define HNSW_ELEMENT_TUPLE_TYPE  1
@@ -101,6 +98,7 @@ typedef struct HnswElementData
 	List	   *heaptids;
 	uint8		level;
 	uint8		deleted;
+	bool		loaded;
 	HnswNeighborArray *neighbors;
 	BlockNumber blkno;
 	OffsetNumber offno;
@@ -137,7 +135,6 @@ typedef struct HnswOptions
 	int32		vl_len_;		/* varlena header (do not touch directly!) */
 	int			m;				/* number of connections */
 	int			efConstruction; /* size of dynamic candidate list */
-	int			dimensions;
 }			HnswOptions;
 
 typedef struct HnswBuildState
@@ -266,7 +263,6 @@ typedef struct HnswVacuumState
 /* Methods */
 int			HnswGetM(Relation index);
 int			HnswGetEfConstruction(Relation index);
-int			HnswGetDimensions(Relation index);
 FmgrInfo   *HnswOptionalProcInfo(Relation index, uint16 procnum);
 bool		HnswNormValue(FmgrInfo *procinfo, Oid collation, Datum *value, Vector * result);
 void		HnswCommitBuffer(Buffer buf, GenericXLogState *state);

src/hnswbuild.c

@@ -375,13 +375,11 @@ BuildCallback(Relation index, CALLBACK_ITEM_POINTER, Datum *values,
 	if (inserted)
 	{
 		element->value = datumCopy(element->value, false, -1);
+		element->loaded = true;
 		buildstate->elements = lappend(buildstate->elements, element);
 	}
 	else
-	{
-		element->value = PointerGetDatum(NULL);
 		HnswFreeElement(element);
-	}
 
 	/* Reset memory context */
 	MemoryContextReset(buildstate->tmpCtx);
@@ -417,14 +415,7 @@ InitBuildState(HnswBuildState * buildstate, Relation heap, Relation index, Index
 
 	buildstate->m = HnswGetM(index);
 	buildstate->efConstruction = HnswGetEfConstruction(index);
-	buildstate->dimensions = HnswGetDimensions(index);
+	buildstate->dimensions = TupleDescAttr(index->rd_att, 0)->atttypmod;
-
-	if (buildstate->dimensions < 0)
-		buildstate->dimensions = TupleDescAttr(index->rd_att, 0)->atttypmod;
-
-	/* Require column to have dimensions to be indexed */
-	if (buildstate->dimensions < 0)
-		elog(ERROR, "column does not have dimensions");
 
 	if (buildstate->dimensions > HNSW_MAX_DIM)
 		elog(ERROR, "column cannot have more than %d dimensions for hnsw index", HNSW_MAX_DIM);
@@ -448,6 +439,7 @@ InitBuildState(HnswBuildState * buildstate, Relation heap, Relation index, Index
 	buildstate->flushed = false;
 
 	/* Reuse for each tuple */
+	/* TODO Fix / replace with support function */
 	buildstate->normvec = InitVector(buildstate->dimensions);
 
 	buildstate->tmpCtx = AllocSetContextCreate(CurrentMemoryContext,

src/hnswutils.c

@@ -35,20 +35,6 @@ HnswGetEfConstruction(Relation index)
 	return HNSW_DEFAULT_EF_CONSTRUCTION;
 }
 
-/*
- * Get the number of dimensions in the index
- */
-int
-HnswGetDimensions(Relation index)
-{
-	HnswOptions *opts = (HnswOptions *) index->rd_options;
-
-	if (opts)
-		return opts->dimensions;
-
-	return HNSW_DEFAULT_DIMENSIONS;
-}
-
 /*
  * Get proc
  */
@@ -202,7 +188,7 @@ HnswFreeElement(HnswElement element)
 {
 	HnswFreeNeighbors(element);
 	list_free_deep(element->heaptids);
-	if (DatumGetPointer(element->value))
+	if (element->loaded)
 		pfree(DatumGetPointer(element->value));
 	pfree(element);
 }
@@ -230,7 +216,7 @@ HnswInitElementFromBlock(BlockNumber blkno, OffsetNumber offno)
 	element->blkno = blkno;
 	element->offno = offno;
 	element->neighbors = NULL;
-	element->value = PointerGetDatum(NULL);
+	element->loaded = false;
 	return element;
 }
 
@@ -466,6 +452,7 @@ HnswLoadElementFromTuple(HnswElement element, HnswElementTuple etup, bool loadHe
 		Datum		value = PointerGetDatum(&etup->value);
 
 		element->value = datumCopy(value, false, -1);
+		element->loaded = true;
 	}
 }
 
@@ -953,7 +940,7 @@ HnswUpdateConnection(HnswElement element, HnswCandidate * hc, int m, int lc, int
 			{
 				HnswCandidate *hc3 = &currentNeighbors->items[i];
 
-				if (!DatumGetPointer(hc3->element->value))
+				if (!hc3->element->loaded)
 					HnswLoadElement(hc3->element, &hc3->distance, &q, index, procinfo, collation, true);
 				else
 					hc3->distance = GetCandidateDistance(hc3, q, procinfo, collation);

test/t/019_hnsw_array.pl

@@ -104,7 +104,7 @@ for my $i (0 .. $#operators)
 	}
 
 	# Add index
-	$node->safe_psql("postgres", "CREATE INDEX ON tst USING hnsw (v $opclass) WITH (dimensions = 3);");
+	$node->safe_psql("postgres", "CREATE INDEX ON tst USING hnsw (v $opclass);");
 
 	my $min = $operator eq "<#>" ? 0.80 : 0.99;
 	test_recall($min, $operator);