How to drop all tables in db2
Question
I want to drop all tables in db2 database with foregin keys, without drop and recreating.
Solution
If you also want to drop all views, indexes, foreign keys, etc.:
select 'drop index "' || TRIM(INDSCHEMA) || '"."' || TRIM(INDNAME) || '";'
from SYSCAT.INDEXES
where UNIQUERULE = 'D'
and INDSCHEMA = (select current schema from SYSIBM.SYSDUMMY1);
select 'alter table "' || TRIM(TABSCHEMA) || '"."' || TRIM(TABNAME) || '" drop foreign key "' || TRIM(CONSTNAME) || '";'
from SYSCAT.TABCONST
where TYPE = 'F'
and TABSCHEMA = (select current schema from SYSIBM.SYSDUMMY1)
select 'alter table "' || TRIM(TABSCHEMA) || '"."' || TRIM(TABNAME) || '" drop unique "' || TRIM(INDNAME) || '";'
from SYSCAT.INDEXES
where UNIQUERULE = 'U'
and INDSCHEMA = (select current schema from SYSIBM.SYSDUMMY1);
select 'alter table "' || TRIM(TABSCHEMA) || '"."' || TRIM(TABNAME) || '" drop primary key;'
from SYSCAT.INDEXES
where UNIQUERULE = 'P'
and INDSCHEMA = (select current schema from SYSIBM.SYSDUMMY1);
select 'drop table "' || TRIM(TABSCHEMA) || '"."' || TRIM(TABNAME) || '";'
from SYSCAT.TABLES
where TYPE = 'T'
and TABSCHEMA = (select current schema from SYSIBM.SYSDUMMY1);
select 'drop view "' || TRIM(TABSCHEMA) || '"."' || TRIM(TABNAME) || '";'
from SYSCAT.TABLES
where TYPE = 'V'
and TABSCHEMA = (select current schema from SYSIBM.SYSDUMMY1);
OTHER TIPS
If you are in Linux or Unix enviroment.
#!/bin/ksh
## load profile of your instance owner
db2 "connect to <db_name">
db2 -x "select tabschema,tabname from syscat.tables where type='T' and tabschema not like 'SYS%' with ur"|while read a b
do
db2 "load from /dev/null of del replace into $a.$b nonrecoverable"
done
return 0
This script delete the data into the tables.
db2 "Select 'DROP TABLE ', tabname, ';' from syscat.tables where owner='DBUSER'" >> filename
Delete the very first line and last line of the file and run it using,
db2 -tvf filename.
This way we can also save the log of tables we have dropped.
PS: Make sure once, only the tables you wanted are present in the file. Dont by mistake, drop some system tables.
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