Package com.amazonaws.athena.connector.validation

Class ConstraintParser

java.lang.Object

com.amazonaws.athena.connector.validation.ConstraintParser

public class ConstraintParser
extends Object

This class provides the ability to transform a simple constraint grammar into an instance of Constraints.

Method Summary

Modifier and Type	Method	Description
static Constraints	parseConstraints(org.apache.arrow.vector.types.pojo.Schema schema, Optional<String> input)	This method takes in a table schema and a String representing the set of simple contraints to be ANDed together and applied to that table.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

parseConstraints

public static Constraints parseConstraints(org.apache.arrow.vector.types.pojo.Schema schema,
                                           Optional<String> input)

This method takes in a table schema and a String representing the set of simple contraints to be ANDed together and applied to that table.

Parameters:

schema - The schema of the table in question

input - A comma-separated constraint String in the form of {field_name}{operator}{value}. The operators must be one of those available in ConstraintParser.LogicalOperator. Currently, we only support Boolean, Integer, Floating Point, Decimal, and String operands for this validator's constraints.

Returns:

a Constraints object populated from the input string, un-constrained if input is not present