Automatically Drop and Recreate current indexes

Question

I\'m working on providing a method to allow for bulk updating our tables ( greater than 1M new or updated rows per update) and was interested in dropping the current indexes

Answer 1

I have script that I use to query the system tables to capture all non-clustered indexes and disable then rebuild upon completion. The below is for use on standard edition, if you are on enterprise I would add the ONLINE option.

Disable

DECLARE @sql AS VARCHAR(MAX);
SET @sql = '';
SELECT 
    @sql = @sql + 'ALTER INDEX [' + i.name + '] ON [' + o.name + '] DISABLE; '
FROM sys.indexes AS i
JOIN sys.objects AS o ON i.object_id = o.object_id
WHERE i.type_desc = 'NONCLUSTERED'
AND o.type_desc = 'USER_TABLE'

EXEC (@sql)

Rebuild

DECLARE @sql AS VARCHAR(MAX);
SET @sql = '';
SELECT 
    @sql = @sql + 'ALTER INDEX [' + i.name + '] ON [' + o.name + '] REBUILD WITH (FILLFACTOR = 80); '
FROM sys.indexes AS i
JOIN sys.objects AS o ON i.object_id = o.object_id
WHERE i.type_desc = 'NONCLUSTERED'
AND o.type_desc = 'USER_TABLE'

EXEC (@sql);

I like this method as it is very customizable as you can exclude/include certain tables based on the conditions as well as avoiding a cursor. Also you can change the EXEC to a PRINT and see the code that will execute and manually run it.

Condition to exclude a table

AND o.name NOT IN ('tblTest','tblTest1');

Answer 2

EXEC sp_MSforEachTable 'ALTER INDEX ALL ON ? DISABLE'

and

EXEC sp_MSforEachTable 'ALTER INDEX ALL ON ? REBUILD'

is all you need if you want to do it for all tables and every index.