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[5.7] Document column modifiers for identity columns #4632

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Oct 12, 2018
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[5.7] Document column modifiers for identity columns #4632

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2 changes: 2 additions & 0 deletions migrations.md
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Expand Up @@ -295,6 +295,8 @@ Modifier | Description
`->unsigned()` | Set INTEGER columns as UNSIGNED (MySQL)
`->useCurrent()` | Set TIMESTAMP columns to use CURRENT_TIMESTAMP as default value
`->virtualAs($expression)` | Create a virtual generated column (MySQL)
`->generatedAs($expression)` | Create an identity column with specified sequence options (PostgreSQL)
`->always()` | Defines the precedence of sequence values over input for an identity column (PostgreSQL)

<a name="modifying-columns"></a>
### Modifying Columns
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