Columns
| Column | Type | Size | Nulls | Auto | Default | Children | Parents | Comments | |||
|---|---|---|---|---|---|---|---|---|---|---|---|
| id | INT | 10 | √ | null |
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| userId | INT | 10 | null |
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The id of the user who checked out the item |
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| groupedWorkPermanentId | VARCHAR | 40 | √ | NULL |
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| source | VARCHAR | 25 | null |
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The source of the record being checked out |
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| sourceId | VARCHAR | 50 | null |
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The id of the item that item that was checked out within the source |
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| title | VARCHAR | 150 | √ | NULL |
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The title of the item in case this is ever deleted |
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| VARCHAR | 75 | √ | NULL |
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The author of the item in case this is ever deleted |
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| format | VARCHAR | 50 | √ | NULL |
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The format of the item in case this is ever deleted |
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| checkOutDate | INT | 10 | null |
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The first day we detected that the item was checked out to the patron |
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| checkInDate | BIGINT | 19 | √ | NULL |
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| deleted | TINYINT | 3 | 0 |
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| isIll | TINYINT | 3 | √ | 0 |
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Indexes
| Constraint Name | Type | Sort | Column(s) |
|---|---|---|---|
| user_reading_history_work_s_pk | Primary key | Asc | id |
| groupedWorkPermanentId | Performance | Asc | groupedWorkPermanentId |
| PRIMARY | Must be unique | Asc | id |
| sourceId | Performance | Asc | sourceId |
| user_work | Performance | Asc/Asc | userId + groupedWorkPermanentId |
| userId | Performance | Asc/Asc | userId + checkOutDate |
| userId_2 | Performance | Asc/Asc | userId + checkInDate |
| userId_3 | Performance | Asc/Asc | userId + title |
| userId_4 | Performance | Asc/Asc | userId + author |
Relationships
Close relationships within degrees of separation
