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delete from table optimization comment

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aleks-f
2013-02-18 10:48:05 -06:00
parent 32602031fc
commit c1af36b973
1 changed files with 0 additions and 5 deletions
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Data/SQLite/include/Poco/Data/SQLite/SQLiteStatementImpl.h
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@@ -76,11 +76,6 @@ protected:
/// Used to find out the number of rows affected by insert, delete or update. /// Used to find out the number of rows affected by insert, delete or update.
/// All changes are counted, even if they are later undone by a ROLLBACK or ABORT. /// All changes are counted, even if they are later undone by a ROLLBACK or ABORT.
/// Changes associated with creating and dropping tables are not counted. /// Changes associated with creating and dropping tables are not counted.
/// SQLite implements the command "DELETE FROM table" without a WHERE clause by
/// dropping and recreating the table. Because of this optimization, the change count
/// for "DELETE FROM table" will be zero regardless of the number of elements that
/// were originally in the table. To get an accurate count of the number of rows deleted,
/// use "DELETE FROM table WHERE 1".
const MetaColumn& metaColumn(std::size_t pos) const; const MetaColumn& metaColumn(std::size_t pos) const;
/// Returns column meta data. /// Returns column meta data.