feat(catalog): add relpersistence in pg_class (#14400) (#14401)

Co-authored-by: Kexiang Wang <[email protected]>

src/frontend/planner_test/tests/testdata/output/subquery.yaml

@@ -238,7 +238,7 @@
       ├─LogicalFilter { predicate: In($expr1, 'r':Varchar, 'p':Varchar, 'v':Varchar, 'm':Varchar, 'S':Varchar, 'f':Varchar, '':Varchar) AND (rw_schemas.name <> 'pg_catalog':Varchar) AND Not(RegexpEq(rw_schemas.name, '^pg_toast':Varchar)) AND (rw_schemas.name <> 'information_schema':Varchar) }
       │ └─LogicalJoin { type: LeftOuter, on: (rw_schemas.id = rw_tables.schema_id), output: all }
       │   ├─LogicalShare { id: 16 }
-      │   │ └─LogicalProject { exprs: [rw_tables.id, rw_tables.name, rw_tables.schema_id, rw_tables.owner, Case(('table':Varchar = 'table':Varchar), 'r':Varchar, ('table':Varchar = 'system table':Varchar), 'r':Varchar, ('table':Varchar = 'index':Varchar), 'i':Varchar, ('table':Varchar = 'view':Varchar), 'v':Varchar, ('table':Varchar = 'materialized view':Varchar), 'm':Varchar) as $expr1, 0:Int32, 0:Int32, Array as $expr2] }
+      │   │ └─LogicalProject { exprs: [rw_tables.id, rw_tables.name, rw_tables.schema_id, rw_tables.owner, 'p':Varchar, Case(('table':Varchar = 'table':Varchar), 'r':Varchar, ('table':Varchar = 'system table':Varchar), 'r':Varchar, ('table':Varchar = 'index':Varchar), 'i':Varchar, ('table':Varchar = 'view':Varchar), 'v':Varchar, ('table':Varchar = 'materialized view':Varchar), 'm':Varchar) as $expr1, 0:Int32, 0:Int32, Array as $expr2] }
       │   │   └─LogicalShare { id: 14 }
       │   │     └─LogicalUnion { all: true }
       │   │       ├─LogicalUnion { all: true }

src/frontend/src/catalog/system_catalog/pg_catalog/pg_class.rs

@@ -25,6 +25,8 @@ pub static PG_CLASS_COLUMNS: LazyLock<Vec<SystemCatalogColumnsDef<'_>>> = LazyLo
         (DataType::Varchar, "relname"),
         (DataType::Int32, "relnamespace"),
         (DataType::Int32, "relowner"),
+        (DataType::Varchar, "relpersistence"), /* p = permanent table, u = unlogged table, t =
+                                                * temporary table */
         (DataType::Varchar, "relkind"), /* r = ordinary table, i = index, S = sequence, t =
                                          * TOAST table, v = view, m = materialized view, c =
                                          * composite type, f = foreign table, p = partitioned
@@ -38,11 +40,12 @@ pub static PG_CLASS_COLUMNS: LazyLock<Vec<SystemCatalogColumnsDef<'_>>> = LazyLo
 /// The catalog `pg_class` catalogs tables and most everything else that has columns or is otherwise
 /// similar to a table. Ref: [`https://www.postgresql.org/docs/current/catalog-pg-class.html`]
 /// todo: should we add internal tables as well?
-pub static PG_CLASS: LazyLock<BuiltinView> = LazyLock::new(|| BuiltinView {
+pub static PG_CLASS: LazyLock<BuiltinView> = LazyLock::new(|| {
+    BuiltinView {
     name: "pg_class",
     schema: PG_CATALOG_SCHEMA_NAME,
     columns: &PG_CLASS_COLUMNS,
-    sql: "SELECT id AS oid, name AS relname, schema_id AS relnamespace, owner AS relowner, \
+    sql: "SELECT id AS oid, name AS relname, schema_id AS relnamespace, owner AS relowner, 'p' as relpersistence, \
         CASE \
             WHEN relation_type = 'table' THEN 'r' \
             WHEN relation_type = 'system table' THEN 'r' \
@@ -56,4 +59,5 @@ pub static PG_CLASS: LazyLock<BuiltinView> = LazyLock::new(|| BuiltinView {
         FROM rw_catalog.rw_relations\
     "
     .to_string(),
+}
 });