Package io.trino.plugin.base.projection

Class ApplyProjectionUtil

java.lang.Object

io.trino.plugin.base.projection.ApplyProjectionUtil

public final class ApplyProjectionUtil
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ApplyProjectionUtil.ProjectedColumnRepresentation

Method Summary

Modifier and Type	Method	Description
static ApplyProjectionUtil.ProjectedColumnRepresentation	createProjectedColumnRepresentation(ConnectorExpression expression)
static List<ConnectorExpression>	extractSupportedProjectedColumns(ConnectorExpression expression)
static List<ConnectorExpression>	extractSupportedProjectedColumns(ConnectorExpression expression, Predicate<ConnectorExpression> expressionPredicate)
static ConnectorExpression	replaceWithNewVariables(ConnectorExpression expression, Map<ConnectorExpression,Variable> expressionToVariableMappings)	Replace all connector expressions with variables as given by in a top down manner.

Methods inherited from class java.lang.Object

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

Method Details

extractSupportedProjectedColumns

public static List<ConnectorExpression> extractSupportedProjectedColumns(ConnectorExpression expression)

extractSupportedProjectedColumns

public static List<ConnectorExpression> extractSupportedProjectedColumns(ConnectorExpression expression,
 Predicate<ConnectorExpression> expressionPredicate)

createProjectedColumnRepresentation

public static ApplyProjectionUtil.ProjectedColumnRepresentation createProjectedColumnRepresentation(ConnectorExpression expression)

replaceWithNewVariables

public static ConnectorExpression replaceWithNewVariables(ConnectorExpression expression,
 Map<ConnectorExpression,Variable> expressionToVariableMappings)

Replace all connector expressions with variables as given by in a top down manner. i.e. if the replacement occurs for the parent, the children will not be visited.