SQLite插入很慢？ [英] SQLite Insert very slow?

问题描述

我最近阅读了有关SQLite的文章，并认为可以尝试一下。当我插入一条记录时，它执行得很好。但是，当我插入一百时，它需要五秒钟，并且随着记录数的增加，时间也会增加。有什么事吗我正在使用SQLite包装器（system.data.SQlite）：

I recently read about SQLite and thought I would give it a try. When I insert one record it performs okay. But when I insert one hundred it takes five seconds, and as the record count increases so does the time. What could be wrong? I am using the SQLite Wrapper (system.data.SQlite):

dbcon = new SQLiteConnection(connectionString);
dbcon.Open();

//---INSIDE LOOP

 SQLiteCommand sqlComm = new SQLiteCommand(sqlQuery, dbcon);

 nRowUpdatedCount = sqlComm.ExecuteNonQuery(); 

//---END LOOP

dbcon.close();

推荐答案

包装 BEGIN \ END 语句。 Sqlite已针对事务进行了优化。

Wrap BEGIN \ END statements around your bulk inserts. Sqlite is optimized for transactions.

dbcon = new SQLiteConnection(connectionString);
dbcon.Open();

SQLiteCommand sqlComm;
sqlComm = new SQLiteCommand("begin", dbcon);
sqlComm.ExecuteNonQuery(); 
//---INSIDE LOOP

 sqlComm = new SQLiteCommand(sqlQuery, dbcon);

 nRowUpdatedCount = sqlComm.ExecuteNonQuery(); 

//---END LOOP
sqlComm = new SQLiteCommand("end", dbcon);
sqlComm.ExecuteNonQuery(); 
dbcon.close();

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