SQL Server CE 3.5 SP2 - SQLCE Toolbox / Automated Database Schema Upgrade Scripting / Drop Index

Question

I am provisioning for automated database schema upgrades in a Windows Forms Application (VS2010/VB) which uses SQL Server Compact 3.5 SP2.  A portion of the schema upgrade procedure uses TSQL commands passed to SQLCE like the following:
cmd.CommandText = "DROP INDEX [SaleComps$ProjID]"
cmd.ExecuteNonQuery()
However, when this command is processed by the SQLCE engine, I get the following error:
Command: DROP INDEX [SaleComps].[ProjID]
Error: The specified index does not exist. [ ProjID ]
But, if I try to recreate the index (or try to change the index column) I get the following errors which indicate that the index is still there:
Command: ALTER TABLE [SaleComps] ALTER COLUMN [ProjID] nvarchar(20) NULL
Error: Cannot alter a column that is part of a key or an index. [ Index Name = SaleComps$ProjID,Column = ProjID ]
Command: CREATE INDEX "SaleComps$ProjID" ON "SaleComps" ("ProjID" ASC)
Error: The specified index already exists. [ SaleComps$ProjID ]
Any ideas why this would not be working? Thanks!
-BGood

Answer 1

No, I was guessing at the syntax from reviewing other web postings, some of which were in different SQL dialects. 
While your SQLCE Toolbox did not provide the DROP INDEX command, it did provide most of the "Schema Diff" scripting commands.  In hindsight, maybe SQLCE Toolbox should recognize when schema differences involve a Column which is used in an index, and
DROP the index before executing the ALTER COLUMN command, then re-CREATE the index with the modified column.
Despite this shortcoming, I am very thankful for the help provided by SQLCE Toolbox, and learned a little more about SQL scripting in the process.
Thanks, ErikEJ!
-BGood