Expressions

Expressions are the entities needed to describe mathematical expressions involving binary operators like =, AND or OR. All the described entities are available in the igenius_adapters_sdk.entities.query.

Expression

Informs about the type of expression and value used on the provided attribute.
An Expression is used to map simple espressions between an igenius_adapters.sdk.entities.uri.AttributeUri and a scalar value.

class Expression(BaseModel):
    attribute_uri: uri.AttributeUri
    operator: str
    value: Any

Multi Expression

Informs about the logical join between expressions.
With MultiExpression you can build complex expressions chaining multiple Expressions

class CriteriaType(str, Enum):
    AND = 'and'
    OR = 'or'

class MultiExpression(BaseModel):
    criteria: CriteriaType
    expressions: List[Union['MultiExpression', Expression]]

Where Expression

It's a 1:1 mapping that follow the SQL 'WHERE' statement.

WhereExpression = Union[MultiExpression, Expression]

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Last update: February 2, 2021