Adobe AD0-E717 Exam - Topic 10 Question 47 Discussion

Actual exam question for Adobe's AD0-E717 exam

Question #: 47
Topic #: 10

In a new release of a module, a developer decides to rename a table that was defined in the earlier versions. Which action, if any, allows the developer to prevent data loss?

ADefine onCreate='migrateDataFromAnotherTable(old_table_name)' attribute in the table tag.

BDeclarative schema supports RENAME TABLE', so the data will be migrated to the new table automatically.

CDefine the table and columns mapping in the db.schema_whitelist.json

Show Suggested Answer

Suggested Answer: C

When renaming a table in Magento, to prevent data loss, the developer must define the table and its columns mapping in the db_schema_whitelist.json file. This declarative schema approach ensures that the data migration tool knows about the changes and can migrate data from the old table to the newly named table without losing any data.

by Barb at May 04, 2025, 11:30 AM

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Jannette

2 months ago

Wait, can you really just rename it without losing data?

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Jacki

2 months ago

I think A is a good option too, but B seems safer.

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Kate

2 months ago

B is correct, RENAME TABLE handles it automatically.

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Selma

3 months ago

Definitely going with B, no doubt about it!

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Vinnie

3 months ago

C sounds interesting, but I’m not sure it’s necessary here.

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Chi

3 months ago

I'm a bit confused about the options. I thought renaming a table would always require some manual migration steps, but maybe option B is the exception?

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Glendora

3 months ago

I feel like I saw a similar question in our practice tests, but I can't recall if the db.schema_whitelist.json mapping is really necessary for this scenario.

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Dyan

4 months ago

I think option B sounds familiar because we discussed how declarative schema can handle renaming tables automatically. That might be the safest choice.

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Erasmo

4 months ago

I remember something about using the onCreate attribute to handle data migration, but I'm not entirely sure if that's the best approach here.

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Denny

4 months ago

I think the key here is to prevent data loss. Option B seems like the safest bet, since it should automatically migrate the data to the new table. But I'll double-check the other options just to be sure.

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Isaiah

4 months ago

I'm a bit confused by this question. I'm not familiar with the RENAME TABLE feature in declarative schema. I'll need to do some research on that before I can confidently answer this.

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Nada

4 months ago

Okay, let me see. I think option A might work, where you define an onCreate migration to move the data from the old table to the new one. But I'm not 100% sure if that's the best approach.

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Lauran

5 months ago

Hmm, I'm not sure about this one. I'll have to think it through carefully. Maybe I should review the module documentation again to see if there are any other options.

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