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Question

Why is the external tables functionality, which attaches raw files to a database, not suitable for query processing?

a.

It requires excessive disk space.

b.

It lacks support for CSV format files.

c.

Parsing and tokenizing costs are too high.

d.

It cannot handle large datasets.

Posted under Big Data Computing

Answer: (c).Parsing and tokenizing costs are too high. Explanation:The external tables functionality is not suitable for query processing because parsing and tokenizing costs are too high. These costs are necessary to distinguish attribute values in raw files and transform them into binary form, making query processing inefficient.

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Q. Why is the external tables functionality, which attaches raw files to a database, not suitable for query processing?

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