The main goal of this feature is to enable a command that will
1) Generate a parameterized command for each edit that is in the session
2) Execute that command against the server
3) Update the cached results of the table/view that's being edited with the committed changes (including computed/identity columns)
There's some secret sauce in here where I cheated around worrying about gaps in the updated results. This was accomplished by implementing an IComparable for row edit objects that ensures deletes are the *last* actions to occur and that they occur from the bottom of the list up (highest row ID to lowest). Thus, all other actions that are dependent on the row ID are performed first, then the largest row ID is deleted, then next largest, etc. Nevertheless, by the end of a commit the associated ResultSet is still the source of truth. It is expected that the results grid will need updating once changes are committed.
Also worth noting, although this pull request supports a "many edits, one commit" approach, it will work just fine for a "one edit, one commit" approach.
* WIP
* Adding basic commit support. Deletions work!
* Nailing down the commit logic, insert commits work!
* Updates work!
* Fixing bug in DbColumnWrapper IsReadOnly setting
* Comments
* ResultSet unit tests, fixing issue with seeking in mock writers
* Unit tests for RowCreate commands
* Unit tests for RowDelete
* RowUpdate unit tests
* Session and edit base tests
* Fixing broken unit tests
* Moving constants to constants file
* Addressing code review feedback
* Fixes from merge issues, string consts
* Removing ad-hoc code
* fixing as per @abist requests
* Fixing a couple more issues
This is a very large change. I'll try to outline what's going on.
1. This adds the **EditDataService** which manages editing **Sessions**.
1. Each session has a **ResultSet** (from the QueryExecutionService) which has the rows of the table and basic metadata about the columns
2. Each session also has an **IEditTableMetadata** implementation which is derived from SMO metadata which provides more in-depth and trustworthy data about the table than SqlClient alone can.
3. Each session holds a list of **RowEditBase** abstract class implementations
1. **RowUpdate** - Update cells in a row (generates `UPDATE` statement)
2. **RowDelete** - Delete an entire row (generates `DELETE` statement)
3. **RowCreate** - Add a new row (generates `INSERT INTO` statement)
4. Row edits have a collection of **CellUpdates** that hold updates for individual cells (except for RowDelete)
1. Cell updates are generated from text
5. RowEditBase offers some baseline functionality
1. Generation of `WHERE` clauses (which can be parameterized)
2. Validation of whether a column can be updated
2. New API Actions
1. edit/initialize - Queries for the contents of a table/view, builds SMO metadata, sets up a session
2. edit/createRow - Adds a new RowCreate to the Session
3. edit/deleteRow - Adds a new RowDelete to the Session
4. edit/updateCell - Adds a CellUpdate to a RowCreate or RowUpdate in the Session
5. edit/revertRow - Removes a RowCreate, RowDelete, or RowUpdate from the Session
6. edit/script - Generates a script for the changes in the Session and stores to disk
7. edit/dispose - Removes a Session and releases the query
3. Smaller updates (unit test mock improvements, tweaks to query execution service)
**There are more updates planned -- this is just to get eyeballs on the main body of code**
* Initial stubs for edit data service
* Stubbing out update management code
* Adding rudimentary dispose request
* More stubbing out of update row code
* Adding complete edit command contracts, stubbing out request handlers
* Adding basic implementation of get script
* More in progress work to implement base of row edits
* More in progress work to implement base of row edits
* Adding string => object conversion logic and various cleanup
* Adding a formatter for using values in scripts
* Splitting IMessageSender into IEventSender and IRequestSender
* Adding inter-service method for executing queries
* Adding inter-service method for disposing of a query
* Changing edit contract to include the object to edit
* Fully fleshing out edit session initialization
* Generation of delete scripts is working
* Adding scripter for update statements
* Adding scripting functionality for INSERT statements
* Insert, Update, and Delete all working with SMO metadata
* Polishing for SqlScriptFormatter
* Unit tests and reworked byte[] conversion
* Replacing the awful and inflexible Dictionary<string, string>[][] with a much better test data set class
* Fixing syntax error in generated UPDATE statements
* Adding unit tests for RowCreate
* Adding tests for the row edit base class
* Adding row delete tests
* Adding RowUpdate tests, validation for number of key columns
* Adding tests for the unit class
* Adding get script tests for the session
* Service integration tests, except initialization tests
* Service integration tests, except initialization tests
* Adding messages to sr.strings
* Adding messages to sr.strings
* Fixing broken unit tests
* Adding factory pattern for SMO metadata provider
* Copyright and other comments
* Addressing first round of comments
* Refactoring EditDataService to have a single method for handling
session-dependent operations
* Refactoring Edit Data contracts to inherit from a Session and Row
operation params base class
* Copyright additions
* Small tweak to strings
* Updated unit tests to test the refactors
* More revisions as per pull request comments
