org.apache.iceberg.expressions

Class ManifestEvaluator

java.lang.Object

org.apache.iceberg.expressions.ManifestEvaluator

public class ManifestEvaluator
extends java.lang.Object

Evaluates an Expression on a ManifestFile to test whether the file contains matching partitions.

For row expressions, evaluation is inclusive: it returns true if a file may match and false if it cannot match.

Files are passed to eval(ManifestFile), which returns true if the manifest may contain data files that match the partition expression. Manifest files may be skipped if and only if the return value of eval is false.

Method Summary

Modifier and Type	Method and Description
boolean	eval(ManifestFile manifest) Test whether the file may contain records that match the expression.
static ManifestEvaluator	forPartitionFilter(Expression partitionFilter, PartitionSpec spec, boolean caseSensitive)
static ManifestEvaluator	forRowFilter(Expression rowFilter, PartitionSpec spec, boolean caseSensitive)

Methods inherited from class java.lang.Object

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

Method Detail

forRowFilter

public static ManifestEvaluator forRowFilter(Expression rowFilter,
                                             PartitionSpec spec,
                                             boolean caseSensitive)

forPartitionFilter

public static ManifestEvaluator forPartitionFilter(Expression partitionFilter,
                                                   PartitionSpec spec,
                                                   boolean caseSensitive)

eval

public boolean eval(ManifestFile manifest)

Test whether the file may contain records that match the expression.

Parameters:

manifest - a manifest file

Returns:

false if the file cannot contain rows that match the expression, true otherwise.