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Re:Ruby concepts part 2 (1 viewing) (1) Guest
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TOPIC: Re:Ruby concepts part 2
#4654
ShriNi (User)
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Re:Ruby concepts part 2 3 Years, 10 Months ago Karma: 0  
The DBI provides two methods to either commit or rollback a transaction.

There is one more method called transaction which can be used to implement transactions.

There are two simple approaches to implement transactions
 
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#4655
ShriNi (User)
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Re:Ruby concepts part 2 3 Years, 10 Months ago Karma: 0  
The second approach uses the transaction method.

This is simpler, because it takes a code block containing the statements that make up the transaction
 
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ShriNi (User)
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Re:Ruby concepts part 2 3 Years, 10 Months ago Karma: 0  
The first approach uses DBI's commit and rollback methods to explicitly commit or cancel the transaction:
 
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ShriNi (User)
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Re:Ruby concepts part 2 3 Years, 10 Months ago Karma: 0  
The transaction method executes the block, then invokes commit or rollback automatically, depending on whether the block succeeds or fails.
 
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Re:Ruby concepts part 2 3 Years, 10 Months ago Karma: 0  
COMMIT Operation

Commit is the operation which gives a green signal to database to finalize the changes and after this operation no change can be reverted back
 
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Re:Ruby concepts part 2 3 Years, 10 Months ago Karma: 0  
ROLLBACK Operation

If we are not satisfied with one or more of the changes and we want to revert back those changes completely then use rollback method
 
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