Disallow joining more than 63 tables

Returns an error instead of panicing

core/translate/optimizer/mod.rs

@@ -187,6 +187,12 @@ fn optimize_table_access(
     order_by: &mut Vec<(Box<ast::Expr>, SortOrder)>,
     group_by: &mut Option<GroupBy>,
 ) -> Result<Option<Vec<JoinOrderMember>>> {
+    if table_references.joined_tables().len() > TableReferences::MAX_JOINED_TABLES {
+        crate::bail_parse_error!(
+            "Only up to {} tables can be joined",
+            TableReferences::MAX_JOINED_TABLES
+        );
+    }
     let access_methods_arena = RefCell::new(Vec::new());
     let maybe_order_target = compute_order_target(order_by, group_by.as_mut());
     let constraints_per_table =

core/translate/plan.rs

@@ -583,6 +583,11 @@ pub struct TableReferences {
 }
 
 impl TableReferences {
+    /// The maximum number of tables that can be joined together in a query.
+    /// This limit is arbitrary, although we currently use a u128 to represent the [crate::translate::planner::TableMask],
+    /// which can represent up to 128 tables.
+    /// Even at 63 tables we currently cannot handle the optimization performantly, hence the arbitrary cap.
+    pub const MAX_JOINED_TABLES: usize = 63;
     pub fn new(
         joined_tables: Vec<JoinedTable>,
         outer_query_refs: Vec<OuterQueryReference>,