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################################################################################
# inc/gcol_dependencies_on_gcol.inc #
# #
# Purpose: #
# Testing scenarios when columns depend on generated columns, i.e. such as #
# - a generated column is based on a generated column #
# - a "real" column on which a generated one is renamed/dropped #
# - a generated column involved in partitioning is renamed/dropped #
# #
#------------------------------------------------------------------------------#
# Original Author: Andrey Zhakov #
# Original Date: 2008-09-02 #
# Change Author: #
# Change Date: #
# Change: #
################################################################################
--echo # Can't define a generated column on another generated column
--error ER_VCOL_BASED_ON_VCOL
create table t1 (a int, b int generated always as (a+1) virtual, c int generated always as (b+1) virtual);
create table t1 (a int, b int generated always as (a+1) virtual);
--error ER_VCOL_BASED_ON_VCOL
alter table t1 add column c int generated always as (b+1) virtual;
drop table t1;
--echo # Can't rename or drop a column used in the function of a generated column
create table t1 (a int, b int generated always as (a+1) virtual);
--echo # On renaming/dropping a column on which a virtual field is
--echo # defined the following error is displayed:
--echo # "Unknown column 'a' in 'generated column function'"
--error 1054
alter table t1 drop column a;
--error 1054
alter table t1 change a c int;
drop table t1;
--echo # Can't rename or drop a generated column used by the paritition function
create table t1 (a int, b int generated always as (a+1) virtual) partition by hash(b);
--error 1054
alter table t1 drop b;
--error 1054
alter table t1 change b c int generated always as (a+1) virtual;
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