Function _index_operation_delete

src/commands/cmd_query.c:127–171

}

static bool _index_operation_delete
(
	GraphContext *gc,
	AST *ast
) {
	Schema *s = NULL;
	SchemaType schema_type = SCHEMA_NODE;
	const cypher_astnode_t *index_op = ast->root;

	// retrieve strings from AST node
	const char *label = cypher_ast_label_get_name(
			cypher_ast_drop_props_index_get_label(index_op));
	const char *attr = cypher_ast_prop_name_get_value(
			cypher_ast_drop_props_index_get_prop_name(index_op, 0));

	Attribute_ID attr_id = GraphContext_GetAttributeID(gc, attr);

	// try deleting a NODE EXACT-MATCH index

	// lock
	QueryCtx_LockForCommit();

	s = GraphContext_GetSchema(gc, label, SCHEMA_NODE);
	if(s != NULL) {
		if(Schema_GetIndex(s, &attr_id, 1, IDX_EXACT_MATCH, true) != NULL) {
			// try deleting an exact match node index
			return GraphContext_DeleteIndex(gc, SCHEMA_NODE, label, attr, IDX_EXACT_MATCH);
		}
	}

	// try removing from an edge schema
	s = GraphContext_GetSchema(gc, label, SCHEMA_EDGE);
	if(s != NULL) {
		if(Schema_GetIndex(s, &attr_id, 1, IDX_EXACT_MATCH, true) != NULL) {
			// try deleting an exact match edge index
			return GraphContext_DeleteIndex(gc, SCHEMA_EDGE, label, attr, IDX_EXACT_MATCH);
		}
	}

	// no matching index
	ErrorCtx_SetError("ERR Unable to drop index on :%s(%s): no such index.",
			label, attr);

	return false;
}

// create index structure
static void _index_operation_create