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Adding new state selectors #3596

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Jul 6, 2023
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Adding new state selectors #3596

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Adding new state selectors
matthewshaver Jun 21, 2023
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Update website/docs/reference/node-selection/methods.md
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12 changes: 11 additions & 1 deletion website/docs/reference/node-selection/methods.md
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Expand Up @@ -178,7 +178,7 @@ The `state` method is used to select nodes by comparing them against a previous

</VersionBlock>

`state:new`: There is no node with the same `unique_id` in the comparison manifest
`state:new`: There is no node with the same `unique_id` in the comparison manifest.
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`state:modified`: All new nodes, plus any changes to existing nodes.

Expand All @@ -200,6 +200,16 @@ Because state comparison is complex, and everyone's project is different, dbt su

Remember that `state:modified` includes _all_ of the criteria above, as well as some extra resource-specific criteria, such as modifying a source's `freshness` or `quoting` rules or an exposure's `maturity` property. (View the source code for the full set of checks used when comparing [sources](https://github.com/dbt-labs/dbt-core/blob/9e796671dd55d4781284d36c035d1db19641cd80/core/dbt/contracts/graph/parsed.py#L660-L681), [exposures](https://github.com/dbt-labs/dbt-core/blob/9e796671dd55d4781284d36c035d1db19641cd80/core/dbt/contracts/graph/parsed.py#L768-L783), and [executable nodes](https://github.com/dbt-labs/dbt-core/blob/9e796671dd55d4781284d36c035d1db19641cd80/core/dbt/contracts/graph/parsed.py#L319-L330).)

<VersionBlock firstVersion="1.6">

There are two additional `state` selectors that complement `state:new` and `state:modified` by representing the inverse of those functions:
- `state:old`: a node with the same `unique_id` exists in the comparison manifest
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- `state:unmodified`: All existing nodes with no changes
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The benefits for these selectors are primarily to exclude unchanged nodes to shorten run times. There are no subselectors available, but that may change as use cases evolve.
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</VersionBlock>

### The "exposure" method

The `exposure` method is used to select parent resources of a specified [exposure](/docs/build/exposures). Use in conjunction with the `+` operator.
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