20 lines
763 B
Markdown
20 lines
763 B
Markdown
---
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layout: page
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title: Query Table
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parent: language
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weight: 250
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permalink: :basename
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---
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### Query table
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Query is the entry point to a CodeRules program. The only purpose of a query is to activate constraints that trigger computations necessary for the query logic. Essentially a query is a limited constraint rule that only has the *body* part.
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_(example of a query)_
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A query is discovered by the API through its *kind*, which is specific to the language aspect, and which is represented as a Java interface. Query declares its kind in the **handle** section. The body of a query can contain same constraints and predicates as regular constraint rules.
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_(example of a query interface)_
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