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Version: 0.9

Data Types

Tecton supports the following data types for Feature Value and Request Data:

Int64​

  • Int64 value is represented as JSON string in HTTP response. This is because JSON does not specify a precision for numerical values, and most JSON libraries treat all numerical values as double-precision floating point numbers.
  • Int32 will be automatically cast to Int64 in online serving.

Float64​

String​

Bool​

  • Bool acceptable values: "True" or "False"

Array(elementType)​

  • Represents values comprising a sequence of homogeneous elements with the type elementType. The Array can contain the following element types:
    • Int64, Float32, Float64, String, Map, Struct, Array
  • Limitations:
    • Array is not available in Tecton with Snowflake. The only exception is that Tecton Managed Aggregation could aggregate raw data into an array such as first-N and last-N aggregations.
    • Array doesn’t support Map, Struct and Array as element type in Serverless Feature Retrieval with Athena.
    • Array is not available in Rift with snowflake_sql mode.

Struct(fields)​

  • Represents values with a structure that is defined by a list of Field.
  • Field(name,dataType) represents a single field in a Struct. The name of a field is defined by name. The data type of a field is defined by dataType, and it supports the following types:
    • Int64, Float64, String, Bool, Map, Struct, Array
  • It is stored efficiently in the online store by being encoded to an Array.
  • Limitations
    • Struct is not available in Tecton with Snowflake.
    • Struct is not available in ODFV RequestSource with pandas mode.
    • Struct is not available in Serverless Feature Retrieval with Athena
    • Struct is not available in Rift with snowflake_sql mode.

Map(keyType,valueType)​

  • Represents values comprising a set of key-value pair where key and value type are predefined by keyType and valueType.
  • keyType only supports String
  • valueType supports following types
    • Int64, Float64, String, Bool, Map, Struct, Array
  • Limitations
    • Map is not available in Tecton with Snowflake.
    • Map is not available in Serverless Feature Retrieval with Athena
    • Map is not available in Rift with snowflake_sql mode.

Timestamp​

  • Timestamp can be used to annotate the "timestamp" field when specifying the schema of a Data Source or Feature View; however, it can not be used as an actual feature value or used in an Aggregation.
info

Tecton supports nulls for request data and feature values. Check Handling Nulls for more details.

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