org.apache.hadoop.hive.ql.parse.relnodegen

Class LateralViewPlan

java.lang.Object

org.apache.hadoop.hive.ql.parse.relnodegen.LateralViewPlan

public class LateralViewPlan
extends Object

LateralViewPlan is a helper class holding the objects needed for generating a Calcite plan from an ASTNode. The object is to be generated when a LATERAL_VIEW token is detected. From the ASTNode and relevant input node information, the following objects are created: * A HiveTableFunctionScan RelNode * A RowResolver containing the row resolving information output from the RelNode * The table alias for the table generated by the UDTF and Lateral View

Field Summary

Fields

Modifier and Type	Field and Description
String	lateralTableAlias
org.apache.calcite.rel.RelNode	lateralViewRel
protected static org.slf4j.Logger	LOG
RowResolver	outputRR
static com.google.common.collect.ImmutableSet<Integer>	TABLE_ALIAS_TOKEN_TYPES

Constructor Summary

Constructors

Constructor and Description
LateralViewPlan(ASTNode lateralView, org.apache.calcite.plan.RelOptCluster cluster, org.apache.calcite.rel.RelNode inputRel, RowResolver inputRR, UnparseTranslator unparseTranslator, HiveConf conf, FunctionHelper functionHelper)

Method Summary

Modifier and Type	Method and Description
static void	validateLateralView(ASTNode lateralView)

Methods inherited from class java.lang.Object

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

Field Detail

LOG

protected static final org.slf4j.Logger LOG

TABLE_ALIAS_TOKEN_TYPES

public static final com.google.common.collect.ImmutableSet<Integer> TABLE_ALIAS_TOKEN_TYPES

lateralViewRel

public final org.apache.calcite.rel.RelNode lateralViewRel

outputRR

public final RowResolver outputRR

lateralTableAlias

public final String lateralTableAlias

Constructor Detail

LateralViewPlan

public LateralViewPlan(ASTNode lateralView,
                       org.apache.calcite.plan.RelOptCluster cluster,
                       org.apache.calcite.rel.RelNode inputRel,
                       RowResolver inputRR,
                       UnparseTranslator unparseTranslator,
                       HiveConf conf,
                       FunctionHelper functionHelper)
                throws SemanticException

Throws:

SemanticException

Method Detail

validateLateralView

public static void validateLateralView(ASTNode lateralView)
                                throws SemanticException

Throws:

SemanticException