should be it

external/duckdb/test/sql/generated_columns/virtual/rowid.test

@@ -0,0 +1,46 @@
+# name: test/sql/generated_columns/virtual/rowid.test
+# description: Create a generated column using the 'rowid' system column
+# group: [virtual]
+
+statement ok
+PRAGMA enable_verification
+
+statement ok
+CREATE TABLE unit (price INTEGER, amount_sold INTEGER);
+
+statement ok
+INSERT INTO unit VALUES (5,4)
+
+statement ok
+INSERT INTO unit VALUES (4,5)
+
+# Rowid as a system column is not supported
+statement error
+ALTER TABLE unit ADD COLUMN total_profit BIGINT GENERATED ALWAYS AS (price * rowid) VIRTUAL;
+----
+
+statement ok
+ALTER TABLE unit ADD COLUMN rowid INTEGER;
+
+# Cant create a generated column named 'rowid' that also tries to reference the 'rowid' system column
+statement error
+CREATE TABLE tbl (
+	price INTEGER,
+	rowid BIGINT GENERATED ALWAYS AS (rowid) VIRTUAL
+);
+----
+
+# Reference a standard column named 'rowid'
+statement ok
+CREATE TABLE tbl (
+	rowid INTEGER,
+	index INTEGER GENERATED ALWAYS AS (rowid) VIRTUAL
+)
+
+statement ok
+INSERT INTO tbl VALUES (5)
+
+query I
+SELECT index FROM tbl;
+----
+5