# Copyright Materialize, Inc. and contributors. All rights reserved.
#
# Use of this software is governed by the Business Source License
# included in the LICENSE file at the root of this repository.
#
# As of the Change Date specified in that file, in accordance with
# the Business Source License, use of this software will be governed
# by the Apache License, Version 2.0.

statement ok
CREATE TABLE accounts(id int, balance int);


statement ok
CREATE OR REPLACE MATERIALIZED VIEW mv AS
  SELECT * FROM accounts WHERE balance = 100;


mode cockroach


# baseline explain (no index used)
query T multiline
EXPLAIN OPTIMIZED PLAN WITH (humanized expressions) AS VERBOSE TEXT FOR MATERIALIZED VIEW mv;
----
materialize.public.mv:
  Filter (#1{balance} = 100)
    ReadStorage materialize.public.accounts

Source materialize.public.accounts
  filter=((#1{balance} = 100))

Target cluster: quickstart

EOF


statement ok
CREATE INDEX accounts_balance_idx ON accounts(balance);


# ensure that the index is still not used
query T multiline
EXPLAIN OPTIMIZED PLAN WITH (humanized expressions) AS VERBOSE TEXT FOR MATERIALIZED VIEW mv;
----
materialize.public.mv:
  Filter (#1{balance} = 100)
    ReadStorage materialize.public.accounts

Source materialize.public.accounts
  filter=((#1{balance} = 100))

Target cluster: quickstart

EOF

query T multiline
EXPLAIN PHYSICAL PLAN AS VERBOSE TEXT FOR MATERIALIZED VIEW mv;
----
materialize.public.mv:
  Get::Collection materialize.public.accounts
    raw=true

Source materialize.public.accounts
  filter=((#1{balance} = 100))

Target cluster: quickstart

EOF

# re-create the view so it can pick up the index
statement ok
CREATE OR REPLACE MATERIALIZED VIEW mv AS
  SELECT * FROM accounts WHERE balance = 100;


# ensure that the index is now used by the view
query T multiline
EXPLAIN OPTIMIZED PLAN WITH (humanized expressions) AS VERBOSE TEXT FOR MATERIALIZED VIEW mv;
----
materialize.public.mv:
  Project (#0{id}, #1{balance})
    ReadIndex on=materialize.public.accounts accounts_balance_idx=[lookup value=(100)]

Used Indexes:
  - materialize.public.accounts_balance_idx (lookup)

Target cluster: quickstart

EOF

query T multiline
EXPLAIN PHYSICAL PLAN AS VERBOSE TEXT FOR MATERIALIZED VIEW mv;
----
materialize.public.mv:
  Join::Linear
    linear_stage[0]
      closure
        project=(#1, #0)
      lookup={ relation=0, key=[#1{balance}] }
      stream={ key=[#0], thinning=() }
    source={ relation=1, key=[#0] }
    Get::PassArrangements materialize.public.accounts
      raw=false
      arrangements[0]={ key=[#1{balance}], permutation={#0: #1, #1: #0}, thinning=(#0) }
      types=[integer?, integer?]
    ArrangeBy
      raw=true
      arrangements[0]={ key=[#0], permutation=id, thinning=() }
      types=[integer]
      Constant
        - (100)

Used Indexes:
  - materialize.public.accounts_balance_idx (lookup)

Target cluster: quickstart

EOF

# rename the index
statement ok
ALTER INDEX accounts_balance_idx RENAME TO accounts_balance_index;


# ensure that the index is still used by the view
query T multiline
EXPLAIN OPTIMIZED PLAN WITH (humanized expressions) AS VERBOSE TEXT FOR MATERIALIZED VIEW mv;
----
materialize.public.mv:
  Project (#0{id}, #1{balance})
    ReadIndex on=materialize.public.accounts accounts_balance_index=[lookup value=(100)]

Used Indexes:
  - materialize.public.accounts_balance_index (lookup)

Target cluster: quickstart

EOF

query T multiline
EXPLAIN PHYSICAL PLAN AS VERBOSE TEXT FOR MATERIALIZED VIEW mv;
----
materialize.public.mv:
  Join::Linear
    linear_stage[0]
      closure
        project=(#1, #0)
      lookup={ relation=0, key=[#1{balance}] }
      stream={ key=[#0], thinning=() }
    source={ relation=1, key=[#0] }
    Get::PassArrangements materialize.public.accounts
      raw=false
      arrangements[0]={ key=[#1{balance}], permutation={#0: #1, #1: #0}, thinning=(#0) }
      types=[integer?, integer?]
    ArrangeBy
      raw=true
      arrangements[0]={ key=[#0], permutation=id, thinning=() }
      types=[integer]
      Constant
        - (100)

Used Indexes:
  - materialize.public.accounts_balance_index (lookup)

Target cluster: quickstart

EOF


# drop the index
statement ok
DROP INDEX accounts_balance_index;


# The index is still used by the view
query T multiline
EXPLAIN OPTIMIZED PLAN WITH (humanized expressions) AS VERBOSE TEXT FOR MATERIALIZED VIEW mv;
----
materialize.public.mv:
  Project (#0{id}, #1{balance})
    ReadIndex on=materialize.public.accounts [DELETED INDEX]=[lookup value=(100)]

Used Indexes:
  - [DELETED INDEX] (lookup)

Target cluster: quickstart

EOF

query T multiline
EXPLAIN PHYSICAL PLAN AS VERBOSE TEXT FOR MATERIALIZED VIEW mv;
----
materialize.public.mv:
  Join::Linear
    linear_stage[0]
      closure
        project=(#1, #0)
      lookup={ relation=0, key=[#1{balance}] }
      stream={ key=[#0], thinning=() }
    source={ relation=1, key=[#0] }
    Get::PassArrangements materialize.public.accounts
      raw=false
      arrangements[0]={ key=[#1{balance}], permutation={#0: #1, #1: #0}, thinning=(#0) }
      types=[integer?, integer?]
    ArrangeBy
      raw=true
      arrangements[0]={ key=[#0], permutation=id, thinning=() }
      types=[integer]
      Constant
        - (100)

Used Indexes:
  - [DELETED INDEX] (lookup)

Target cluster: quickstart

EOF