1################################################################################
2# inc/gcol_dependencies_on_gcol.inc                                            #
3#                                                                              #
4# Purpose:                                                                     #
5#  Testing scenarios when columns depend on generated columns, i.e. such as    #
6#   - a generated column is based on a generated column                            #
7#   - a "real" column on which a generated one is renamed/dropped              #
8#   - a generated column involved in partitioning is renamed/dropped           #
9#                                                                              #
10#------------------------------------------------------------------------------#
11# Original Author: Andrey Zhakov                                               #
12# Original Date: 2008-09-02                                                    #
13# Change Author:                                                               #
14# Change Date:                                                                 #
15# Change:                                                                      #
16################################################################################
17
18--echo # Can't define a generated column on another generated column
19--error ER_VCOL_BASED_ON_VCOL
20create table t1 (a int, b int generated always as (a+1) virtual, c int generated always as (b+1) virtual);
21create table t1 (a int, b int generated always as (a+1) virtual);
22--error ER_VCOL_BASED_ON_VCOL
23alter table t1 add column c int generated always as (b+1) virtual;
24drop table t1;
25
26--echo # Can't rename or drop a column used in the function of a generated column
27create table t1 (a int, b int generated always as (a+1) virtual);
28--echo # On renaming/dropping a column on which a virtual field is
29--echo # defined the following error is displayed:
30--echo # "Unknown column 'a' in 'generated column function'"
31--error 1054
32alter table t1 drop column a;
33--error 1054
34alter table t1 change a c int;
35drop table t1;
36
37--echo # Can't rename or drop a generated column used by the paritition function
38create table t1 (a int, b int generated always as (a+1) virtual) partition by hash(b);
39--error 1054
40alter table t1 drop b;
41--error 1054
42alter table t1 change b c int generated always as (a+1) virtual;
43
44