recursion_classification.md

Recursion Classification of raw_parse.rs Convert Functions

This document classifies every convert_* function in raw_parse.rs into two categories:

1. Recursive — the function calls convert_node, convert_node_boxed, convert_list_to_nodes, or transitively calls another function that does, meaning it re-enters the main convert_node dispatch and can contribute to unbounded recursion depth.

2. Non-recursive (leaf) — the function never re-enters convert_node. It only reads scalar fields, calls convert_c_string, or calls other leaf functions. These are safe from stack overflow regardless of input.

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Transitive helper classification

Before classifying the top-level converters, we need to know which "typed helper" converters are themselves recursive. A helper is recursive if it calls convert_node_boxed, convert_list_to_nodes, or another recursive helper.

Helper	Recursive?	Reason
convert_c_string	No	Pure C string → Rust string
convert_function_parameter_mode	No	Pure enum mapping
convert_string	No	Only calls convert_c_string
convert_role_spec	No	Only calls convert_c_string
convert_json_format	No	Only scalar fields
convert_json_returning	No	Only calls convert_json_format (leaf)
convert_json_table_path	No	Only calls convert_c_string
convert_alias	Yes	Calls convert_list_to_nodes(alias.colnames)
convert_range_var	Yes	Calls convert_alias (recursive)
convert_type_name	Yes	Calls convert_list_to_nodes (×3: names, typmods, arrayBounds)
convert_object_with_args	Yes	Calls convert_list_to_nodes (×3)
convert_window_def	Yes	Calls convert_list_to_nodes, convert_node_boxed
convert_with_clause	Yes	Calls convert_list_to_nodes
convert_with_clause_opt	Yes	Calls convert_with_clause
convert_variable_set_stmt	Yes	Calls convert_list_to_nodes
convert_variable_set_stmt_opt	Yes	Calls convert_variable_set_stmt
convert_collate_clause	Yes	Calls convert_node_boxed, convert_list_to_nodes
convert_collate_clause_opt	Yes	Calls convert_collate_clause
convert_partition_spec	Yes	Calls convert_list_to_nodes
convert_partition_spec_opt	Yes	Calls convert_partition_spec
convert_partition_bound_spec	Yes	Calls convert_list_to_nodes (×3)
convert_partition_bound_spec_opt	Yes	Calls convert_partition_bound_spec
convert_cte_search_clause	Yes	Calls convert_list_to_nodes
convert_cte_search_clause_opt	Yes	Calls convert_cte_search_clause
convert_cte_cycle_clause	Yes	Calls convert_list_to_nodes, convert_node_boxed
convert_cte_cycle_clause_opt	Yes	Calls convert_cte_cycle_clause
convert_infer_clause	Yes	Calls convert_list_to_nodes, convert_node_boxed
convert_infer_clause_opt	Yes	Calls convert_list_to_nodes, convert_node_boxed
convert_on_conflict_clause	Yes	Calls convert_infer_clause, convert_list_to_nodes, convert_node_boxed
convert_into_clause	Yes	Calls convert_range_var, convert_list_to_nodes, convert_node_boxed
convert_json_output	Yes	Calls convert_type_name (recursive)
convert_json_value_expr	Yes	Calls convert_node_boxed
convert_json_behavior	Yes	Calls convert_node_boxed
convert_json_agg_constructor	Yes	Calls convert_node_boxed, convert_list_to_nodes, convert_window_def
convert_json_key_value	Yes	Calls convert_node_boxed, convert_json_value_expr
convert_func_call	Yes	Calls convert_list_to_nodes, convert_node_boxed, convert_window_def
convert_grant_stmt	Yes	Calls convert_list_to_nodes, convert_role_spec
convert_publication_table	Yes	Calls convert_range_var, convert_node_boxed, convert_list_to_nodes
convert_create_stmt	Yes	Calls convert_range_var, convert_list_to_nodes, convert_type_name, etc.

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Non-Recursive (Leaf) Functions

These functions never re-enter convert_node — not directly and not through any transitive call chain. They are entirely safe from contributing to stack depth.

#	Function	Lines	What it calls
1	convert_c_string	L2177–2183	— (raw pointer to String)
2	convert_function_parameter_mode	L1933–1943	— (pure enum match)
3	convert_string	L1516–1518	convert_c_string
4	convert_a_const	L1179–1217	Reads union fields directly; no node calls
5	convert_bit_string	L2189–2191	convert_c_string
6	convert_role_spec	L1600–1602	convert_c_string
7	convert_replica_identity_stmt	L1520–1522	convert_c_string
8	convert_notify_stmt	L1945–1947	convert_c_string
9	convert_listen_stmt	L1949–1951	convert_c_string
10	convert_unlisten_stmt	L1953–1955	convert_c_string
11	convert_discard_stmt	L1957–1961	Scalar only
12	convert_set_to_default	L1658–1666	Scalar only
13	convert_trigger_transition	L2765–2767	convert_c_string
14	convert_variable_show_stmt	L1836–1838	convert_c_string
15	convert_deallocate_stmt	L1654–1656	convert_c_string, scalars
16	convert_close_portal_stmt	L2217–2219	convert_c_string
17	convert_fetch_stmt	L2221–2228	convert_c_string, scalars
18	convert_load_stmt	L2651–2653	convert_c_string
19	convert_alter_database_refresh_coll_stmt	L2622–2624	convert_c_string
20	convert_alter_event_trig_stmt	L2314–2319	convert_c_string, scalars
21	convert_drop_table_space_stmt	L2464–2466	convert_c_string, scalars
22	convert_drop_subscription_stmt	L2666–2668	convert_c_string, scalars
23	convert_drop_user_mapping_stmt	L2436–2442	convert_role_spec (leaf), convert_c_string
24	convert_json_format	L2837–2839	Scalar only
25	convert_json_returning	L2841–2847	convert_json_format (leaf)
26	convert_json_table_path	L2907–2910	convert_c_string
27	convert_sql_value_function	L2793–2795	Scalar only

Total: 27 non-recursive functions

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Recursive Functions

These functions do re-enter convert_node (directly via convert_node_boxed / convert_list_to_nodes, or transitively via a recursive helper like convert_range_var, convert_alias, convert_type_name, etc.). They contribute to stack depth when processing nested parse trees.

#	Function	Lines	Recursive calls (direct)
1	convert_node	L102–988	Central dispatch — calls all convert_* functions
2	convert_node_boxed	L97–99	convert_node
3	convert_list	L991–994	convert_list_to_nodes
4	convert_list_to_nodes	L999–1020	convert_node (per element)
5	convert_list_to_raw_stmts	L66–89	convert_raw_stmt
6	convert_raw_stmt	L92–94	convert_node_boxed
7	convert_select_stmt	L1026–1049	convert_list_to_nodes (×8), convert_node_boxed (×4), convert_into_clause, convert_with_clause_opt, self-recursive via larg/rarg
8	convert_insert_stmt	L1051–1061	convert_range_var, convert_list_to_nodes (×2), convert_node_boxed, convert_on_conflict_clause, convert_with_clause_opt
9	convert_update_stmt	L1063–1072	convert_range_var, convert_list_to_nodes (×3), convert_node_boxed, convert_with_clause_opt
10	convert_delete_stmt	L1074–1082	convert_range_var, convert_list_to_nodes (×2), convert_node_boxed, convert_with_clause_opt
11	convert_create_stmt	L1084–1099	convert_range_var, convert_list_to_nodes (×4), convert_type_name, convert_partition_bound_spec_opt, convert_partition_spec_opt
12	convert_drop_stmt	L1101–1109	convert_list_to_nodes
13	convert_index_stmt	L1111–1138	convert_range_var, convert_list_to_nodes (×4), convert_node_boxed
14	convert_range_var	L1144–1154	convert_alias → convert_list_to_nodes
15	convert_column_ref	L1156–1158	convert_list_to_nodes
16	convert_res_target	L1160–1167	convert_list_to_nodes, convert_node_boxed
17	convert_a_expr	L1169–1177	convert_list_to_nodes, convert_node_boxed (×2)
18	convert_func_call	L1219–1233	convert_list_to_nodes (×3), convert_node_boxed, convert_window_def
19	convert_type_cast	L1235–1241	convert_node_boxed, convert_type_name
20	convert_type_name	L1243–1254	convert_list_to_nodes (×3)
21	convert_alias	L1256–1258	convert_list_to_nodes
22	convert_join_expr	L1260–1272	convert_node_boxed (×3), convert_list_to_nodes, convert_alias (×2)
23	convert_sort_by	L1274–1282	convert_node_boxed, convert_list_to_nodes
24	convert_bool_expr	L1284–1291	convert_list_to_nodes
25	convert_sub_link	L1293–1303	convert_node_boxed (×2), convert_list_to_nodes
26	convert_null_test	L1305–1313	convert_node_boxed
27	convert_case_expr	L1315–1325	convert_node_boxed (×2), convert_list_to_nodes
28	convert_case_when	L1327–1334	convert_node_boxed (×2)
29	convert_coalesce_expr	L1336–1344	convert_list_to_nodes
30	convert_with_clause	L1346–1348	convert_list_to_nodes
31	convert_with_clause_opt	L1350–1356	convert_with_clause
32	convert_common_table_expr	L1358–1374	convert_list_to_nodes (×5), convert_node_boxed, convert_cte_search_clause_opt, convert_cte_cycle_clause_opt
33	convert_window_def	L1376–1387	convert_list_to_nodes (×2), convert_node_boxed (×2)
34	convert_into_clause	L1389–1404	convert_range_var, convert_list_to_nodes (×2), convert_node_boxed
35	convert_infer_clause	L1406–1417	convert_list_to_nodes, convert_node_boxed
36	convert_on_conflict_clause	L1419–1431	convert_infer_clause, convert_list_to_nodes, convert_node_boxed
37	convert_column_def	L1433–1455	convert_type_name, convert_node_boxed (×2), convert_range_var, convert_collate_clause_opt, convert_list_to_nodes (×2)
38	convert_constraint	L1457–1491	convert_node_boxed (×2), convert_list_to_nodes (×7), convert_range_var
39	convert_index_elem	L1493–1504	convert_node_boxed, convert_list_to_nodes (×3)
40	convert_def_elem	L1506–1514	convert_node_boxed
41	convert_grouping_func	L1524–1532	convert_list_to_nodes (×2)
42	convert_locking_clause	L1534–1540	convert_list_to_nodes
43	convert_min_max_expr	L1542–1552	convert_list_to_nodes
44	convert_grouping_set	L1554–1556	convert_list_to_nodes
45	convert_range_subselect	L1558–1564	convert_node_boxed, convert_alias
46	convert_a_array_expr	L1566–1568	convert_list_to_nodes
47	convert_a_indirection	L1570–1572	convert_node_boxed, convert_list_to_nodes
48	convert_a_indices	L1574–1576	convert_node_boxed (×2)
49	convert_alter_table_stmt	L1578–1585	convert_range_var, convert_list_to_nodes
50	convert_alter_table_cmd	L1587–1598	convert_role_spec, convert_node_boxed
51	convert_copy_stmt	L1604–1615	convert_range_var, convert_node_boxed (×2), convert_list_to_nodes (×2)
52	convert_truncate_stmt	L1617–1619	convert_list_to_nodes
53	convert_view_stmt	L1621–1630	convert_range_var, convert_list_to_nodes (×2), convert_node_boxed
54	convert_explain_stmt	L1632–1634	convert_node_boxed, convert_list_to_nodes
55	convert_create_table_as_stmt	L1636–1644	convert_node_boxed, convert_into_clause
56	convert_prepare_stmt	L1646–1648	convert_list_to_nodes, convert_node_boxed
57	convert_execute_stmt	L1650–1652	convert_list_to_nodes
58	convert_multi_assign_ref	L1668–1670	convert_node_boxed
59	convert_row_expr	L1672–1681	convert_list_to_nodes (×2)
60	convert_collate_clause	L1683–1685	convert_node_boxed, convert_list_to_nodes
61	convert_collate_clause_opt	L1687–1693	convert_collate_clause
62	convert_partition_spec	L1695–1706	convert_list_to_nodes
63	convert_partition_spec_opt	L1708–1714	convert_partition_spec
64	convert_partition_bound_spec	L1716–1727	convert_list_to_nodes (×3)
65	convert_partition_bound_spec_opt	L1729–1735	convert_partition_bound_spec
66	convert_partition_elem	L1737–1745	convert_node_boxed, convert_list_to_nodes (×2)
67	convert_partition_range_datum	L1747–1758	convert_node_boxed
68	convert_cte_search_clause	L1760–1767	convert_list_to_nodes
69	convert_cte_search_clause_opt	L1769–1775	convert_cte_search_clause
70	convert_cte_cycle_clause	L1777–1790	convert_list_to_nodes, convert_node_boxed (×2)
71	convert_cte_cycle_clause_opt	L1792–1798	convert_cte_cycle_clause
72	convert_transaction_stmt	L1804–1813	convert_list_to_nodes
73	convert_vacuum_stmt	L1815–1817	convert_list_to_nodes (×2)
74	convert_vacuum_relation	L1819–1825	convert_range_var, convert_list_to_nodes
75	convert_variable_set_stmt	L1827–1834	convert_list_to_nodes
76	convert_create_seq_stmt	L1840–1848	convert_range_var, convert_list_to_nodes
77	convert_do_stmt	L1850–1852	convert_list_to_nodes
78	convert_lock_stmt	L1854–1856	convert_list_to_nodes
79	convert_create_schema_stmt	L1858–1865	convert_role_spec, convert_list_to_nodes
80	convert_rename_stmt	L1867–1878	convert_range_var, convert_node_boxed
81	convert_create_function_stmt	L1880–1890	convert_list_to_nodes (×3), convert_type_name, convert_node_boxed
82	convert_alter_owner_stmt	L1892–1899	convert_range_var, convert_node_boxed, convert_role_spec
83	convert_alter_seq_stmt	L1901–1908	convert_range_var, convert_list_to_nodes
84	convert_create_enum_stmt	L1910–1912	convert_list_to_nodes (×2)
85	convert_object_with_args	L1914–1921	convert_list_to_nodes (×3)
86	convert_function_parameter	L1923–1930	convert_type_name, convert_node_boxed
87	convert_coerce_to_domain	L1963–1973	convert_node_boxed
88	convert_composite_type_stmt	L1975–1980	convert_range_var, convert_list_to_nodes
89	convert_create_domain_stmt	L1982–1989	convert_list_to_nodes (×2), convert_type_name, convert_collate_clause_opt
90	convert_create_extension_stmt	L1991–1997	convert_list_to_nodes
91	convert_create_publication_stmt	L1999–2006	convert_list_to_nodes (×2)
92	convert_alter_publication_stmt	L2008–2016	convert_list_to_nodes (×2)
93	convert_create_subscription_stmt	L2018–2025	convert_list_to_nodes (×2)
94	convert_alter_subscription_stmt	L2027–2035	convert_list_to_nodes (×2)
95	convert_publication_obj_spec	L2037–2040	convert_publication_table (recursive)
96	convert_publication_table	L2042–2049	convert_range_var, convert_node_boxed, convert_list_to_nodes
97	convert_create_trig_stmt	L2051–2069	convert_range_var (×2), convert_list_to_nodes (×4), convert_node_boxed
98	convert_call_stmt	L2071–2077	convert_func_call, convert_list_to_nodes
99	convert_rule_stmt	L2079–2089	convert_range_var, convert_node_boxed, convert_list_to_nodes
100	convert_grant_stmt	L2091–2103	convert_list_to_nodes (×3), convert_role_spec
101	convert_grant_role_stmt	L2105–2114	convert_list_to_nodes (×3), convert_role_spec
102	convert_refresh_mat_view_stmt	L2116–2122	convert_range_var (recursive via alias)
103	convert_merge_stmt	L2124–2133	convert_range_var, convert_node_boxed (×2), convert_list_to_nodes (×2), convert_with_clause_opt
104	convert_merge_action	L2135–2144	convert_node_boxed, convert_list_to_nodes (×2)
105	convert_merge_when_clause	L2146–2155	convert_node_boxed, convert_list_to_nodes (×2)
106	convert_range_function	L2157–2166	convert_list_to_nodes (×2), convert_alias
107	convert_access_priv	L2168–2170	convert_list_to_nodes
108	convert_boolean_test	L2193–2200	convert_node_boxed
109	convert_create_range_stmt	L2202–2204	convert_list_to_nodes (×2)
110	convert_alter_enum_stmt	L2206–2215	convert_list_to_nodes
111	convert_declare_cursor_stmt	L2230–2232	convert_node_boxed
112	convert_define_stmt	L2234–2244	convert_list_to_nodes (×3)
113	convert_comment_stmt	L2246–2248	convert_node_boxed
114	convert_sec_label_stmt	L2250–2257	convert_node_boxed
115	convert_create_role_stmt	L2259–2261	convert_list_to_nodes
116	convert_alter_role_stmt	L2263–2269	convert_role_spec, convert_list_to_nodes
117	convert_alter_role_set_stmt	L2271–2277	convert_role_spec, convert_variable_set_stmt_opt (recursive)
118	convert_drop_role_stmt	L2279–2281	convert_list_to_nodes
119	convert_create_policy_stmt	L2283–2293	convert_range_var, convert_list_to_nodes, convert_node_boxed (×2)
120	convert_alter_policy_stmt	L2295–2303	convert_range_var, convert_list_to_nodes, convert_node_boxed (×2)
121	convert_create_event_trig_stmt	L2305–2312	convert_list_to_nodes (×2)
122	convert_create_plang_stmt	L2321–2330	convert_list_to_nodes (×3)
123	convert_create_am_stmt	L2332–2338	convert_list_to_nodes
124	convert_create_op_class_stmt	L2340–2349	convert_list_to_nodes (×3), convert_type_name
125	convert_create_op_class_item	L2351–2360	convert_object_with_args, convert_list_to_nodes (×2), convert_type_name
126	convert_create_op_family_stmt	L2362–2364	convert_list_to_nodes
127	convert_alter_op_family_stmt	L2366–2373	convert_list_to_nodes (×2)
128	convert_create_fdw_stmt	L2375–2381	convert_list_to_nodes (×2)
129	convert_alter_fdw_stmt	L2383–2389	convert_list_to_nodes (×2)
130	convert_create_foreign_server_stmt	L2391–2400	convert_list_to_nodes
131	convert_alter_foreign_server_stmt	L2402–2409	convert_list_to_nodes
132	convert_create_foreign_table_stmt	L2411–2417	convert_create_stmt (recursive), convert_list_to_nodes
133	convert_create_user_mapping_stmt	L2419–2426	convert_role_spec, convert_list_to_nodes
134	convert_alter_user_mapping_stmt	L2428–2434	convert_role_spec, convert_list_to_nodes
135	convert_import_foreign_schema_stmt	L2444–2453	convert_list_to_nodes (×2)
136	convert_create_table_space_stmt	L2455–2462	convert_role_spec, convert_list_to_nodes
137	convert_alter_table_space_options_stmt	L2468–2474	convert_list_to_nodes
138	convert_alter_table_move_all_stmt	L2476–2484	convert_list_to_nodes
139	convert_alter_extension_stmt	L2486–2488	convert_list_to_nodes
140	convert_alter_extension_contents_stmt	L2490–2497	convert_node_boxed
141	convert_alter_domain_stmt	L2499–2508	convert_list_to_nodes, convert_node_boxed
142	convert_alter_function_stmt	L2510–2516	convert_object_with_args, convert_list_to_nodes
143	convert_alter_operator_stmt	L2518–2523	convert_object_with_args, convert_list_to_nodes
144	convert_alter_type_stmt	L2525–2527	convert_list_to_nodes (×2)
145	convert_alter_object_schema_stmt	L2529–2537	convert_range_var, convert_node_boxed
146	convert_alter_object_depends_stmt	L2539–2547	convert_range_var, convert_node_boxed, convert_string
147	convert_alter_collation_stmt	L2549–2551	convert_list_to_nodes
148	convert_alter_default_privileges_stmt	L2553–2558	convert_list_to_nodes, convert_grant_stmt (recursive)
149	convert_create_cast_stmt	L2560–2568	convert_type_name (×2), convert_object_with_args
150	convert_create_transform_stmt	L2570–2578	convert_type_name, convert_object_with_args (×2)
151	convert_create_conversion_stmt	L2580–2588	convert_list_to_nodes (×2)
152	convert_alter_ts_dictionary_stmt	L2590–2592	convert_list_to_nodes (×2)
153	convert_alter_ts_configuration_stmt	L2594–2604	convert_list_to_nodes (×3)
154	convert_createdb_stmt	L2606–2608	convert_list_to_nodes
155	convert_dropdb_stmt	L2610–2612	convert_list_to_nodes
156	convert_alter_database_stmt	L2614–2616	convert_list_to_nodes
157	convert_alter_database_set_stmt	L2618–2620	convert_variable_set_stmt_opt (recursive)
158	convert_alter_system_stmt	L2626–2628	convert_variable_set_stmt_opt (recursive)
159	convert_cluster_stmt	L2630–2636	convert_range_var, convert_list_to_nodes
160	convert_reindex_stmt	L2638–2645	convert_range_var, convert_list_to_nodes
161	convert_constraints_set_stmt	L2647–2649	convert_list_to_nodes
162	convert_drop_owned_stmt	L2655–2657	convert_list_to_nodes
163	convert_reassign_owned_stmt	L2659–2664	convert_list_to_nodes, convert_role_spec
164	convert_table_func	L2670–2690	convert_list_to_nodes (×11), convert_node_boxed (×3)
165	convert_into_clause_node	L2692–2703	convert_range_var, convert_list_to_nodes (×2), convert_node_boxed
166	convert_table_like_clause	L2705–2711	convert_range_var
167	convert_range_table_func	L2713–2723	convert_node_boxed (×2), convert_list_to_nodes (×2), convert_alias
168	convert_range_table_func_col	L2725–2735	convert_type_name, convert_node_boxed (×2)
169	convert_range_table_sample	L2737–2745	convert_node_boxed (×2), convert_list_to_nodes (×2)
170	convert_partition_cmd	L2747–2753	convert_range_var, convert_partition_bound_spec_opt
171	convert_on_conflict_clause_node	L2755–2763	convert_infer_clause_opt, convert_list_to_nodes, convert_node_boxed
172	convert_create_stats_stmt	L2769–2779	convert_list_to_nodes (×4)
173	convert_alter_stats_stmt	L2781–2787	convert_list_to_nodes, convert_node_boxed
174	convert_stats_elem	L2789–2791	convert_node_boxed
175	convert_xml_expr	L2797–2811	convert_list_to_nodes (×3)
176	convert_xml_serialize	L2813–2821	convert_node_boxed, convert_type_name
177	convert_named_arg_expr	L2823–2831	convert_node_boxed
178	convert_json_value_expr	L2849–2855	convert_node_boxed (×2), convert_json_format
179	convert_json_constructor_expr	L2857–2869	convert_list_to_nodes, convert_node_boxed (×2), convert_json_returning
180	convert_json_is_predicate	L2871–2879	convert_node_boxed, convert_json_format
181	convert_json_behavior	L2881–2883	convert_node_boxed
182	convert_json_expr	L2885–2905	convert_node_boxed (×2), convert_json_format, convert_json_returning, convert_list_to_nodes (×2), convert_json_behavior (×2)
183	convert_json_table_path_scan	L2912–2921	convert_node_boxed (×2), convert_json_table_path
184	convert_json_table_sibling_join	L2923–2929	convert_node_boxed (×3)
185	convert_json_output	L2931–2936	convert_type_name (recursive), convert_json_returning
186	convert_json_argument	L2938–2943	convert_json_value_expr (recursive)
187	convert_json_func_expr	L2945–2959	convert_json_value_expr, convert_node_boxed, convert_list_to_nodes, convert_json_output, convert_json_behavior (×2)
188	convert_json_table_path_spec	L2961–2968	convert_node_boxed
189	convert_json_table	L2970–2981	convert_json_value_expr, convert_json_table_path_spec, convert_list_to_nodes (×2), convert_json_behavior, convert_alias
190	convert_json_table_column	L2983–2997	convert_type_name, convert_json_table_path_spec, convert_json_format, convert_list_to_nodes, convert_json_behavior (×2)
191	convert_json_key_value	L2999–3004	convert_node_boxed, convert_json_value_expr
192	convert_json_parse_expr	L3006–3013	convert_json_value_expr, convert_json_output
193	convert_json_scalar_expr	L3015–3021	convert_node_boxed, convert_json_output
194	convert_json_serialize_expr	L3023–3029	convert_json_value_expr, convert_json_output
195	convert_json_object_constructor	L3031–3039	convert_list_to_nodes, convert_json_output
196	convert_json_array_constructor	L3041–3048	convert_list_to_nodes, convert_json_output
197	convert_json_array_query_constructor	L3050–3058	convert_node_boxed, convert_json_output, convert_json_format
198	convert_json_agg_constructor	L3060–3068	convert_json_output, convert_node_boxed, convert_list_to_nodes, convert_window_def
199	convert_json_object_agg	L3070–3077	convert_json_agg_constructor (recursive), convert_json_key_value (recursive)
200	convert_json_array_agg	L3079–3085	convert_json_agg_constructor (recursive), convert_json_value_expr (recursive)
201	convert_variable_set_stmt_opt	L3091–3097	convert_variable_set_stmt (recursive)
202	convert_infer_clause_opt	L3099–3111	convert_list_to_nodes, convert_node_boxed

Total: 202 recursive functions (including the 6 core dispatch/list functions)

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Summary

Category	Count	Notes
Non-recursive (leaf)	27	Safe — never re-enter convert_node
Recursive	202	Re-enter convert_node directly or transitively
Total	229	All convert_* functions in raw_parse.rs

The overwhelming majority of functions are recursive because nearly every PostgreSQL node type contains at least one List field (converted via convert_list_to_nodes) or a child Node* pointer (converted via convert_node_boxed). Even seemingly simple types like RangeVar are recursive because they contain an optional Alias, which in turn has a colnames list that goes through convert_list_to_nodes.

Highest-risk recursion paths (unbounded depth)

Path	Cause
convert_select_stmt → convert_select_stmt (larg/rarg)	Long UNION/INTERSECT/EXCEPT chains
convert_bool_expr → convert_list_to_nodes → convert_node → convert_bool_expr	Deeply nested AND/OR
convert_join_expr → convert_node_boxed (larg/rarg) → convert_node → convert_join_expr	Many-way explicit JOIN
convert_sub_link → convert_node_boxed (subselect) → convert_node → convert_select_stmt → ...	Nested subqueries
convert_a_expr → convert_node_boxed (lexpr/rexpr) → convert_node → convert_a_expr	Deeply nested expressions
convert_case_expr → convert_list_to_nodes → ... → convert_case_expr	Nested CASE expressions