org.apache.hudi.util

Class ExpressionUtils

java.lang.Object

org.apache.hudi.util.ExpressionUtils

public class ExpressionUtils
extends Object

Utilities for expression resolving.

Constructor Summary

Constructors

Constructor and Description
ExpressionUtils()

Method Summary

Modifier and Type	Method and Description
static Object	getValueFromLiteral(org.apache.flink.table.expressions.ValueLiteralExpression expr) Returns the value with given value literal expression.
static boolean	isSimpleCallExpression(org.apache.flink.table.expressions.Expression expr) Returns whether the given expression is simple call expression: a binary call with one operand as field reference and another operand as literal.
static String[]	referencedColumns(List<org.apache.flink.table.expressions.ResolvedExpression> exprs) Collect the referenced columns with given expressions, only simple call expression is supported.

Methods inherited from class java.lang.Object

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

Constructor Detail

ExpressionUtils

public ExpressionUtils()

Method Detail

referencedColumns

public static String[] referencedColumns(List<org.apache.flink.table.expressions.ResolvedExpression> exprs)

Collect the referenced columns with given expressions, only simple call expression is supported.

isSimpleCallExpression

public static boolean isSimpleCallExpression(org.apache.flink.table.expressions.Expression expr)

Returns whether the given expression is simple call expression: a binary call with one operand as field reference and another operand as literal.

getValueFromLiteral

@Nullable
public static Object getValueFromLiteral(org.apache.flink.table.expressions.ValueLiteralExpression expr)

Returns the value with given value literal expression.

Returns null if the value can not parse as the output data type correctly, should call ValueLiteralExpression.isNull first to decide whether the literal is NULL.