text: ALTER TABLE example_table
      ADD CONSTRAINT example_name PRIMARY KEY (example_sk);
  
  alter table users
  rename to users_bkup;
  
  alter table venue
  owner to dwuser;
  
  alter table vdate owner to vuser;
  
  alter table venue
  rename column venueseats to venuesize;
  
  alter table category
  drop constraint category_pkey;
  
  alter table event alter column eventname type varchar(300);
  
  create table t1(c0 int encode lzo, c1 bigint encode zstd, c2 varchar(16) encode lzo, c3 varchar(32) encode zstd);
  
  alter table t1 alter column c0 encode az64;
  
  alter table t1 alter column c1 encode az64;
  
  alter table t1 alter column c2 encode bytedict;
  
  alter table t1 alter column c3 encode runlength;
  
  alter table inventory alter diststyle key distkey inv_warehouse_sk;
  
  alter table inventory alter distkey inv_item_sk;
  
  alter table inventory alter diststyle all;
  
  alter table t1 alter sortkey(c0, c1);
  
  alter table t1 alter sortkey none;
  
  alter table t1 alter sortkey(c0, c1);
  
  alter table t1 alter encode auto;
  
  alter table t2 alter column c0 encode lzo;
  