What is the name of the special internal database where the query optimizer finds information?

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29-08-2017
Computers and Technology

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What is the name of the special internal database where the query optimizer finds information?

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shinmin shinmin · Answer 1 · 2017-09-09T06:00:50+02:00

The relational catalog is the description of the data base and its subjects. Commonly, this information is stored in the data base or in another table - possibly with a reserved name and is not directly updated by user applications. An alternative word for relational catalog is "system catalog" or occasionally called "data dictionary". Examples of entities contain:

- Databases

- Tables

- Logs

- Variables

- Columns

- Constraints

- Users