Fix issues with tables.patch RPC method

db/sql/00_msar.sql

@@ -1170,55 +1170,45 @@ $$ LANGUAGE plpgsql RETURNS NULL ON NULL INPUT;
 
 -- Rename table ------------------------------------------------------------------------------------
 
+DROP FUNCTION IF EXISTS msar.rename_table(text, text, text);
 CREATE OR REPLACE FUNCTION
-__msar.rename_table(old_tab_name text, new_tab_name text) RETURNS text AS $$/*
+msar.rename_table(sch_name text, old_tab_name text, new_tab_name text) RETURNS void AS $$/*
 Change a table's name, returning the command executed.
 
 Args:
-  old_tab_name: properly quoted, qualified table name
-  new_tab_name: properly quoted, unqualified table name
+  sch_name: unquoted schema name where the table lives
+  old_tab_name: unquoted, unqualified original table name
+  new_tab_name: unquoted, unqualified new table name
 */
 BEGIN
-  RETURN __msar.exec_ddl(
-    'ALTER TABLE %s RENAME TO %s', old_tab_name, new_tab_name
-  );
+  IF old_tab_name = new_tab_name THEN
+    -- Return early if the names are the same. This avoids an error from Postgres.
+    RETURN;
+  END IF;
+  EXECUTE format('ALTER TABLE %I.%I RENAME TO %I', sch_name, old_tab_name, new_tab_name);
 END;
 $$ LANGUAGE plpgsql RETURNS NULL ON NULL INPUT;
 
 
+DROP FUNCTION IF EXISTS msar.rename_table(oid, text);
 CREATE OR REPLACE FUNCTION
-msar.rename_table(tab_id oid, new_tab_name text) RETURNS text AS $$/*
+msar.rename_table(tab_id oid, new_tab_name text) RETURNS void AS $$/*
 Change a table's name, returning the command executed.
 
 Args:
   tab_id: the OID of the table whose name we want to change
   new_tab_name: unquoted, unqualified table name
 */
 BEGIN
-  RETURN __msar.rename_table(
-    __msar.get_qualified_relation_name_or_null(tab_id),
-    quote_ident(new_tab_name)
+  PERFORM msar.rename_table(
+    msar.get_relation_schema_name(tab_id),
+    msar.get_relation_name(tab_id),
+    new_tab_name
   );
 END;
 $$ LANGUAGE plpgsql RETURNS NULL ON NULL INPUT;
 
 
-CREATE OR REPLACE FUNCTION
-msar.rename_table(sch_name text, old_tab_name text, new_tab_name text) RETURNS text AS $$/*
-Change a table's name, returning the command executed.
-
-Args:
-  sch_name: unquoted schema name where the table lives
-  old_tab_name: unquoted, unqualified original table name
-  new_tab_name: unquoted, unqualified new table name
-*/
-DECLARE fullname text;
-BEGIN
-  fullname := __msar.build_qualified_name_sql(sch_name, old_tab_name);
-  RETURN __msar.rename_table(fullname, quote_ident(new_tab_name));
-END;
-$$ LANGUAGE plpgsql RETURNS NULL ON NULL INPUT;
-
 
 -- Comment on table --------------------------------------------------------------------------------
 

db/sql/test_00_msar.sql

@@ -1370,6 +1370,19 @@ END;
 $$ LANGUAGE plpgsql;
 
 
+CREATE OR REPLACE FUNCTION test_rename_table_with_same_name() RETURNS SETOF TEXT AS $$
+BEGIN
+  PERFORM __setup_alter_table();
+  PERFORM msar.rename_table(
+    sch_name =>'public',
+    old_tab_name => 'alter_this_table',
+    new_tab_name => 'alter_this_table'
+  );
+  RETURN NEXT has_table('alter_this_table');
+END;
+$$ LANGUAGE plpgsql;
+
+
 CREATE OR REPLACE FUNCTION test_rename_table_using_oid() RETURNS SETOF TEXT AS $$
 BEGIN
   PERFORM __setup_alter_table();

db/tables/operations/alter.py

@@ -1,4 +1,6 @@
 """The functions in this module wrap SQL functions that use `ALTER TABLE`."""
+import json
+
 from db import constants
 from db import connection as db_conn
 from db.columns.operations.alter import batch_update_columns
@@ -66,7 +68,7 @@ def alter_table_on_database(table_oid, table_data_dict, conn):
     }
     """
     return db_conn.exec_msar_func(
-        conn, 'alter_table', table_oid, table_data_dict
+        conn, 'alter_table', table_oid, json.dumps(table_data_dict)
     ).fetchone()[0]
 
 

db/tests/tables/operations/test_alter.py

@@ -1,3 +1,5 @@
+import json
+
 from unittest.mock import patch
 import db.tables.operations.alter as tab_alter
 
@@ -42,4 +44,8 @@ def test_alter_table():
     assert call_args[0] == "conn"
     assert call_args[1] == "alter_table"
     assert call_args[2] == 12345
-    assert call_args[3] == {"name": "newname", "description": "this is a comment", "columns": {}}
+    assert call_args[3] == json.dumps({
+        "name": "newname",
+        "description": "this is a comment",
+        "columns": {},
+    })