Nested-loops join algorithm poorly works on database : With the column oriented storage, every attributes of the relation is stored in a different file...

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Answer 1

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Chapter 15, Problem 15PE

Explanation of Solution

Nested-loops join algorithm poorly works on database:

With the column oriented storage, every attributes of the relation is stored in a different file...

Explanation of Solution

Alternative algorithm for better usage:

Join queries are not fast with column oriented storage as joins involving reading many columns of many records and large amount of data has to be read from the two relations.

The invisible join algorithm is designed for column oriented data warehouses organized in a star schema.

Here, join one fact table with many dimensions table thereby making sure that the table that can be accessed in position order is the fact table for each join.

Now, insert the position lists from the fact table in position order thereby reducing the amount of data accessed out of order from the dimensions table.

Next, rewrite the joins into selection predicates on the foreign key column in the fact table...

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Answer 2

Expert Solution & Answer

Chapter 15, Problem 15PE

Explanation of Solution

Nested-loops join algorithm poorly works on database:

With the column oriented storage, every attributes of the relation is stored in a different file...

Explanation of Solution

Alternative algorithm for better usage:

Join queries are not fast with column oriented storage as joins involving reading many columns of many records and large amount of data has to be read from the two relations.

The invisible join algorithm is designed for column oriented data warehouses organized in a star schema.

Here, join one fact table with many dimensions table thereby making sure that the table that can be accessed in position order is the fact table for each join.

Now, insert the position lists from the fact table in position order thereby reducing the amount of data accessed out of order from the dimensions table.

Next, rewrite the joins into selection predicates on the foreign key column in the fact table...

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 3

Expert Solution & Answer

Chapter 15, Problem 15PE

Explanation of Solution

Nested-loops join algorithm poorly works on database:

With the column oriented storage, every attributes of the relation is stored in a different file...

Explanation of Solution

Alternative algorithm for better usage:

Join queries are not fast with column oriented storage as joins involving reading many columns of many records and large amount of data has to be read from the two relations.

The invisible join algorithm is designed for column oriented data warehouses organized in a star schema.

Here, join one fact table with many dimensions table thereby making sure that the table that can be accessed in position order is the fact table for each join.

Now, insert the position lists from the fact table in position order thereby reducing the amount of data accessed out of order from the dimensions table.

Next, rewrite the joins into selection predicates on the foreign key column in the fact table...

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 4

Expert Solution & Answer

Chapter 15, Problem 15PE

Explanation of Solution

Nested-loops join algorithm poorly works on database:

With the column oriented storage, every attributes of the relation is stored in a different file...

Explanation of Solution

Alternative algorithm for better usage:

Join queries are not fast with column oriented storage as joins involving reading many columns of many records and large amount of data has to be read from the two relations.

The invisible join algorithm is designed for column oriented data warehouses organized in a star schema.

Here, join one fact table with many dimensions table thereby making sure that the table that can be accessed in position order is the fact table for each join.

Now, insert the position lists from the fact table in position order thereby reducing the amount of data accessed out of order from the dimensions table.

Next, rewrite the joins into selection predicates on the foreign key column in the fact table...

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 5

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Answer 6

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Answer 7

Chapter 15, Problem 15PE

Explanation of Solution

Nested-loops join algorithm poorly works on database:

With the column oriented storage, every attributes of the relation is stored in a different file...

Explanation of Solution

Alternative algorithm for better usage:

Join queries are not fast with column oriented storage as joins involving reading many columns of many records and large amount of data has to be read from the two relations.

The invisible join algorithm is designed for column oriented data warehouses organized in a star schema.

Here, join one fact table with many dimensions table thereby making sure that the table that can be accessed in position order is the fact table for each join.

Now, insert the position lists from the fact table in position order thereby reducing the amount of data accessed out of order from the dimensions table.

Next, rewrite the joins into selection predicates on the foreign key column in the fact table...

Answer 8

Chapter 15, Problem 15PE

Explanation of Solution

Nested-loops join algorithm poorly works on database:

With the column oriented storage, every attributes of the relation is stored in a different file...

Answer 9

Chapter 15, Problem 15PE

Explanation of Solution

Nested-loops join algorithm poorly works on database:

With the column oriented storage, every attributes of the relation is stored in a different file...

Answer 10

Explanation of Solution

Alternative algorithm for better usage:

Join queries are not fast with column oriented storage as joins involving reading many columns of many records and large amount of data has to be read from the two relations.

The invisible join algorithm is designed for column oriented data warehouses organized in a star schema.

Here, join one fact table with many dimensions table thereby making sure that the table that can be accessed in position order is the fact table for each join.

Now, insert the position lists from the fact table in position order thereby reducing the amount of data accessed out of order from the dimensions table.

Next, rewrite the joins into selection predicates on the foreign key column in the fact table...

Answer 11

Explanation of Solution

Alternative algorithm for better usage:

Join queries are not fast with column oriented storage as joins involving reading many columns of many records and large amount of data has to be read from the two relations.

The invisible join algorithm is designed for column oriented data warehouses organized in a star schema.

Here, join one fact table with many dimensions table thereby making sure that the table that can be accessed in position order is the fact table for each join.

Now, insert the position lists from the fact table in position order thereby reducing the amount of data accessed out of order from the dimensions table.

Next, rewrite the joins into selection predicates on the foreign key column in the fact table...

Answer 12

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Answer 13

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Answer 14

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Answer 15

Ch. 15 - Prob. 1PE Ch. 15 - Prob. 2PE Ch. 15 - Prob. 3PE Ch. 15 - Prob. 4PE Ch. 15 - Prob. 5PE Ch. 15 - Prob. 6PE Ch. 15 - Prob. 7PE Ch. 15 - Prob. 8PE Ch. 15 - Prob. 9PE Ch. 15 - Prob. 10PE

Nested-loops join algorithm poorly works on database : With the column oriented storage, every attributes of the relation is stored in a different file...

Concept explainers

Explanation of Solution

Nested-loops join algorithm poorly works on database:

With the column oriented storage, every attributes of the relation is stored in a different file...

Explanation of Solution

Want to see the full answer?

Chapter 15 Solutions

Nested-loops join algorithm poorly works on database : With the column oriented storage, every attributes of the relation is stored in a different file...

Concept explainers

Explanation of Solution

Nested-loops join algorithm poorly works on database: With the column oriented storage, every attributes of the relation is stored in a different file...

Explanation of Solution

Want to see the full answer?

Chapter 15 Solutions

Nested-loops join algorithm poorly works on database:

With the column oriented storage, every attributes of the relation is stored in a different file...