virtual_columns

statement ok
SET experimental_enable_virtual_columns = true

statement ok
CREATE TABLE t (a INT PRIMARY KEY, b INT, v INT AS (a+b) VIRTUAL)

# Verify that the primary index doesn't contain the virtual column.
query T
EXPLAIN (OPT, CATALOG) SELECT * from t
----
TABLE t
 ├── a int not null
 ├── b int
 ├── v int as (a + b) virtual [virtual-computed]
 ├── crdb_internal_mvcc_timestamp decimal [hidden] [system]
 ├── tableoid oid [hidden] [system]
 ├── FAMILY fam_0_b (b)
 ├── FAMILY fam_1_a_v (a, v)
 └── INDEX primary
      └── a int not null
project
 ├── scan t
 │    └── computed column expressions
 │         └── v
 │              └── a + b
 └── projections
      └── a + b

query T
EXPLAIN (VERBOSE) SELECT * FROM t
----
distribution: local
vectorized: true
·
• render
│ columns: (a, b, v)
│ estimated row count: 1,000 (missing stats)
│ render 0: a + b
│ render 1: a
│ render 2: b
│
└── • scan
      columns: (a, b)
      estimated row count: 1,000 (missing stats)
      table: t@primary
      spans: FULL SCAN