| Goal | Domains are reusable artifacts. By associating a domain with a sequence generator, one essentially starts to share sequence generators between tables. It may cause a potential performance bottleneck by having a shared resource. By having a shared sequence it is not possible to change properties of sequences of different tables independently, i.e., it increases coupling between tables. |
|---|---|
| Notes | In case of the string_agg function, the line break (br) tag is used as a part of the separator for the better readability in case the query result is displayed in a web browser. |
| Type | Problem detection (Each row in the result could represent a flaw in the design) |
| Reliability | Medium (Medium number of false-positive results) |
| License | MIT (opens in new tab) |
| Fixing Suggestion | Do not associate a sequence generator with a domain. Use for each table a separate sequence generator. |
| Data Source | INFORMATION_SCHEMA only |
| SQL Query |
|
Collections
This query belongs to the following collections:
Find problems automatically
Queries, that results point to problems in the database. Each query in the collection produces an initial assessment. However, a human reviewer has the final say as to whether there is a problem or not .
| Name | Description |
|---|---|
| Find problems automatically | Queries, that results point to problems in the database. Each query in the collection produces an initial assessment. However, a human reviewer has the final say as to whether there is a problem or not . |
Categories
This query is classified under the following categories:
Comfortability of data management
Queries of this category provide information about the means that have been used to make the use or management of database more comfortable and thus, more efficient.
Default value
Queries of this catergory provide information about the use of default values.
Domains
Queries of this category provide information about reusable specifications of column properties.
Performance
Queries of this category provide information about indexes in a database.
Sequence generators
Queries of this category provide information about sequence generators and their usage.
| Name | Description |
|---|---|
| Comfortability of data management | Queries of this category provide information about the means that have been used to make the use or management of database more comfortable and thus, more efficient. |
| Default value | Queries of this catergory provide information about the use of default values. |
| Domains | Queries of this category provide information about reusable specifications of column properties. |
| Performance | Queries of this category provide information about indexes in a database. |
| Sequence generators | Queries of this category provide information about sequence generators and their usage. |