Merge pull request #536 from supabase/or/rls_fkey_nullability_fix

RLS fkey nullability fix

Author: imor

sql/load_sql_context.sql

@@ -148,6 +148,7 @@ select
                                 'local_table_meta', jsonb_build_object(
                                     'oid', pf.conrelid::int,
                                     'name', pa_local.relname::text,
+                                    'is_rls_enabled', pa_local.relrowsecurity,
                                     'schema', pa_local.relnamespace::regnamespace::text,
                                     'column_names', (
                                         select
@@ -163,6 +164,7 @@ select
                                 'referenced_table_meta', jsonb_build_object(
                                     'oid', pf.confrelid::int,
                                     'name', pa_referenced.relname::text,
+                                    'is_rls_enabled', pa_referenced.relrowsecurity,
                                     'schema', pa_referenced.relnamespace::regnamespace::text,
                                     'column_names', (
                                         select
@@ -234,6 +236,7 @@ select
                             'name', pc.relname::text,
                             'relkind', pc.relkind::text,
                             'reltype', pc.reltype::int,
+                            'is_rls_enabled', pc.relrowsecurity,
                             'schema', schemas_.name,
                             'schema_oid', pc.relnamespace::int,
                             'comment', pg_catalog.obj_description(pc.oid, 'pg_class'),

src/graphql.rs

@@ -1958,6 +1958,7 @@ impl NodeType {
                 .columns
                 .iter()
                 .any(|c| &c.name == colname && c.is_not_null)
+                && !fkey.referenced_table_meta.is_rls_enabled
         }) {
             __Type::NonNull(NonNullType {
                 type_: Box::new(type_),

src/sql_types.rs

@@ -425,6 +425,7 @@ pub struct ForeignKeyTableInfo {
     // The table's actual name
     pub name: String,
     pub schema: String,
+    pub is_rls_enabled: bool,
     pub column_names: Vec<String>,
 }
 
@@ -503,6 +504,7 @@ pub struct Table {
     pub schema: String,
     pub columns: Vec<Arc<Column>>,
     pub comment: Option<String>,
+    pub is_rls_enabled: bool,
     pub relkind: String, // r = table, v = view, m = mat view, f = foreign table
     pub reltype: u32,
     pub permissions: TablePermissions,
@@ -660,12 +662,14 @@ impl Context {
                         oid: table.oid,
                         name: table.name.clone(),
                         schema: table.schema.clone(),
+                        is_rls_enabled: table.is_rls_enabled,
                         column_names: directive_fkey.local_columns.clone(),
                     },
                     referenced_table_meta: ForeignKeyTableInfo {
                         oid: referenced_t.oid,
                         name: referenced_t.name.clone(),
                         schema: referenced_t.schema.clone(),
+                        is_rls_enabled: table.is_rls_enabled,
                         column_names: directive_fkey.foreign_columns.clone(),
                     },
                     directives: ForeignKeyDirectives {