org.apache.hudi.source.stats

Class ExpressionEvaluator.Evaluator

java.lang.Object

org.apache.hudi.source.stats.ExpressionEvaluator.Evaluator

Direct Known Subclasses:

ExpressionEvaluator.And, ExpressionEvaluator.EqualTo, ExpressionEvaluator.GreaterThan, ExpressionEvaluator.GreaterThanOrEqual, ExpressionEvaluator.In, ExpressionEvaluator.IsNotNull, ExpressionEvaluator.IsNull, ExpressionEvaluator.LessThan, ExpressionEvaluator.LessThanOrEqual, ExpressionEvaluator.Not, ExpressionEvaluator.NotEqualTo, ExpressionEvaluator.Or

Enclosing class:

ExpressionEvaluator

public abstract static class ExpressionEvaluator.Evaluator
extends Object

Used for deciding whether the literal values match the column stats. The evaluator can be nested.

Field Summary

Fields

Modifier and Type	Field and Description
protected Object	maxVal
protected Object	minVal
protected long	nullCnt
protected org.apache.flink.table.types.logical.LogicalType	type
protected Object	val

Constructor Summary

Constructors

Constructor and Description
Evaluator()

Method Summary

Modifier and Type	Method and Description
static ExpressionEvaluator.Evaluator	bindCall(org.apache.flink.table.expressions.CallExpression call, org.apache.flink.table.data.RowData indexRow, org.apache.flink.table.types.logical.RowType.RowField[] queryFields) Binds the evaluator with specific call expression.
ExpressionEvaluator.Evaluator	bindColStats(org.apache.flink.table.data.RowData indexRow, org.apache.flink.table.types.logical.RowType.RowField[] queryFields, org.apache.flink.table.expressions.FieldReferenceExpression expr)
ExpressionEvaluator.Evaluator	bindFieldReference(org.apache.flink.table.expressions.FieldReferenceExpression expr)
ExpressionEvaluator.Evaluator	bindVal(org.apache.flink.table.expressions.ValueLiteralExpression vExpr)
abstract boolean	eval()

Methods inherited from class java.lang.Object

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

Field Detail

val

protected Object val

minVal

protected Object minVal

maxVal

protected Object maxVal

nullCnt

protected long nullCnt

type

protected org.apache.flink.table.types.logical.LogicalType type

Constructor Detail

Evaluator

public Evaluator()

Method Detail

bindCall

public static ExpressionEvaluator.Evaluator bindCall(org.apache.flink.table.expressions.CallExpression call,
                                                     org.apache.flink.table.data.RowData indexRow,
                                                     org.apache.flink.table.types.logical.RowType.RowField[] queryFields)

Binds the evaluator with specific call expression.

Three steps to bind the call: 1. map the evaluator instance; 2. bind the field reference; 3. bind the column stats.

Normalize the expression to simplify the subsequent decision logic: always put the literal expression in the RHS.

bindColStats

public ExpressionEvaluator.Evaluator bindColStats(org.apache.flink.table.data.RowData indexRow,
                                                  org.apache.flink.table.types.logical.RowType.RowField[] queryFields,
                                                  org.apache.flink.table.expressions.FieldReferenceExpression expr)

bindVal

public ExpressionEvaluator.Evaluator bindVal(org.apache.flink.table.expressions.ValueLiteralExpression vExpr)

bindFieldReference

public ExpressionEvaluator.Evaluator bindFieldReference(org.apache.flink.table.expressions.FieldReferenceExpression expr)

eval

public abstract boolean eval()