Common execution plans for Oracle

Source: Internet
Author: User
Tags bitwise joins

To access the execution plan for a table:
All-table Scan: Table ACCESS full
ROWID Scan: Table access by user ROWID (ROWID from the user's specified in where condition) or table access by index ROWID (ROWID from index)


Execution plan related to the B-Tree index:
Index unique scanning: index unique scan
Index Range Scan:
Index Full scan: Index
Index fast full scan: Index fast fully scan
Index Hop Scan: Index skip Scan


Execution plan related to bitmap indexing:
Bitmap index single-key-value scan: BITMAP Index One value
Bitmap Index Range Scan: BITMAP Index range scan
Bitmap index Full scan: BITMAP index fully scan
Bitmap index Fast full scan: BITMAP index fast Complete scan
Bitmap Index bitwise with: BITMAP and
Bitmap Index bitwise OR: BITMAP or
Bitmap Index bitwise minus: BITMAP minus
After the bitmap index is used, the result of the last bitmap operation is usually converted into Rowid:bitmap CONVERSION to ROWIDS


Execution plans related to table joins:
Sorting merge joins: Sort join and Merge Join
Nested loops join: NESTED LOOPS
Hash connection: Hash join
Anti-Connection: ANTI
Half Connection: SEMI

Common execution plans for Oracle

Related Article

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.