Function _Schema_RemoveExactMatchIndex

src/schema/schema.c:117–189

}

static int _Schema_RemoveExactMatchIndex
(
	Schema *s,
	const char *field
) {
	ASSERT(s != NULL);
	ASSERT(field != NULL);

	GraphContext *gc = QueryCtx_GetGraphCtx();

	// convert attribute name to attribute ID
	Attribute_ID attr_id = GraphContext_GetAttributeID(gc, field);
	if(attr_id == ATTRIBUTE_ID_NONE) {
		return INDEX_FAIL;
	}

	// try to get index
	// if a pending index exists use it otherwise use the active index
	Index active  = ACTIVE_EXACTMATCH_IDX(s);
	Index pending = PENDING_EXACTMATCH_IDX(s);
	Index idx     = pending;

	// both pending and active indicies do not exists
	if(pending == NULL) {
		if(active == NULL) {
			return INDEX_FAIL;
		}
		// use active
		pending = Index_Clone(active);
		PENDING_EXACTMATCH_IDX(s) = pending;
		idx = pending;
	}

	// index doesn't containts attribute
	if(Index_ContainsAttribute(idx, attr_id) == false) {
		return INDEX_FAIL;
	}

	//--------------------------------------------------------------------------
	// make sure index doesn't supports any constraints
	//--------------------------------------------------------------------------

	uint n = array_len(s->constraints);
	for(uint i = 0; i < n; i++) {
		Constraint c = s->constraints[i];
		if(Constraint_GetStatus(c) != CT_FAILED &&
		   Constraint_GetType(c) == CT_UNIQUE   &&
		   Constraint_ContainsAttribute(c, attr_id)) {
			ErrorCtx_SetError("Index supports constraint");
			return INDEX_FAIL;
		}
	}

	Index_RemoveField(idx, attr_id);

	// if index field count dropped to 0 remove index from schema
	// index will be freed by the indexer thread
	if(Index_FieldsCount(idx) == 0) {