pyflink.table.schema.Schema.Builder.primary_key_named

Builder.primary_key_named(constraint_name: str, *column_names: str) → Builder

Declares a primary key constraint for a set of given columns. Primary key uniquely identify a row in a table. Neither of columns in a primary can be nullable. The primary key is informational only. It will not be enforced. It can be used for optimizations. It is the data owner’s responsibility to ensure uniqueness of the data.

Parameters

• constraint_name – Name for the primary key, can be used to reference the constraint

• column_names – Columns that form a unique primary key