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fixing a crasher when suffering from network issues
- When prompting for an export filename, only select the filename for editing and not the extension
- Remove timing debug from CSV export
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panel also adds the ability to save the current console content to a file on disk. Speed up the updating of the text view by removing the re-draw of the view after each message is appended. The console is still very basic, but is a starting point for more functionality to be added now that it is all handled in a single class.
+ Add the ability to specify the encoding when creating a new database. Addresses issue #125. Also improve the usability of the create database sheet by only enabling the 'Add' button if the database name length is greater than zero. This elimates the check that is done and the error panel that is displayed if the name is empty.
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improves clarity, but also fixes an issue: if a connection with amended details failed, the default favourite details are reloaded in the sheet if a favorite is selected. This change allows a connection to fail and the actual used details to be reshown in the sheet.
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appropriately - offering to retry, reconnect, or disconnect. This fixes Issue #93, Issue #69, and Issue #77.
The gory details:
Previously, MCPKit was correctly running mysql_ping to ensure a connection still existed before running a query, and aborted the query if the connection was no longer active.However the code very rarely checked the response of this, so if a query failed subsequent queries would continue to be run and the program would end up checking non-existent results, throwing Cocoa exceptions and generally breaking. However, mysql_ping would also use the default timeout (30 seconds) for each check - when running the (previous to r333) 14 queries to switch tables, this resulted in a long hang before the program even broke.
To exacerbate the issue, certain situations triggered a bug present in mysql_ping in the old client binaries we're using (http://bugs.mysql.com/bug.php?id=9678), causing mysql_ping to never return despite the presence of a timeout, and so causing an indefinite hang.
This issue has been fixed by:
- Setting a new 10 second connection timeout for both new connections (Issue #69) and for mysql_pings. Once preferences have been redesigned we'll probably make this value editable.
- Enforce the 10 second timeout even if mysql_ping hangs by using interrupts.
- Wrap mysql_ping in a new method to do the above and also catch re-established connections without reporting false failures.
- When a connection has failed, prompt the user to Retry, Reconnect, or Disconnect. Reconnect uses the original details for the old connection to establish a new connection, also attempting to preserve the current encoding.
- Do not return control to the main loop until a connection has been reestablished (or disconnected) - this ensures the program is never in a broken state without having to rewrite all query usage.
Much of the above patches the MCPKit connection methods as necessary.
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- Significantly reduce the queries that have to be performed, improving lag - especially over slow connections (Issue #118; see new controller info under headline code changes).
- Fix Issue #117 properly (export numeric quoting - we now have access to column types and so can quote appropriately).
- Fix Issue #145 (loss of unsigned/null/default attributes when reordering columns).
- Fixes Issue #90 (support for filtering DECIMAL column types)
- Improve table scrolling speed when the table contains long items. (Added a NSFormatter to automatically truncate strings > 150 chars for display purposes only)
- Improved SQL compatibility - for example /* C style comments */ are now correctly ignored in imports and custom queries.
- Add text and symbols emphasising that the table info pane / status view row count is an approximation (partially addresses Issue #141)
- Fixes a major memory leak whenever opening or scrolling tables containing text/blob data.
- SQL import is now faster (SQL parsing part is 3x faster).
- Speed up SQL export (1.5x faster for numeric data; 1.1x faster for string data) and slightly speed up CSV export (~1.1x faster).
- Display sizes on the status view using the byte size formatter, as per table info pane.
Headline code changes:
- Add a new NSMutableString subclass, SPSQLParser. See the header file for documentation and overview, but in short it's a centralised place for SQL parsing. Centralises and improves parsing, improves comment support, improves quoting support. Despite the improved featureset this is also faster than the previous distributed implementations - for example, when used to replace the old splitQueries:, > 3x speedup.
- Implement a new controller which handles a structure and status cache for the current table, and provides structure parsing for specified tables. This cache is now used throughout the code, reducing the queries that have to be performed and providing additional information about the table structure for use; I think it also improves column type format slightly.
- The table info pane and the status view now draw all their data from the cache.
Tweaks:
- Table encoding is now detected directly instead of being derived from the collation - increased accuracy and cope with the DEFAULT encoding.
- Comments and formatting cleaned up in bits I was working on, obviously.
- A couple of methods - particularly [tablesListInstance table] and [tableDocument encoding] - have been renamed to avoid conflicts and fix code warnings.
Future improvements now possible:
- As we now have access to column types and other information, we can provide per-type behaviour where desired.
- The table parsing doesn't currently pull out comments or table indices, together with one or two other attributes. Some of this would be useful for display; some, such as indices, could be used to draw the table structure view as long as we're happy discarding a couple of columns (ie cardinality!)
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Choose Database popup button now reverts to current database when cancelling the "Add Database…" dialog.
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Fixes issue #143
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NSView that is currently selected.
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structure.
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