The new multi-faceted category of cameras offers a long list of powerful features, but does it live up to the hype?. The Compact Camera And Camcorder Guide./*
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package org.apache.spark.sql.catalyst.rules.physical
import org.apache.spark.sql.catalyst.analysis.{UnsupportedAttributeTypeException, ValidationException}
import org.apache.spark.sql.catalyst.expressions.{Attribute, Attribute, Expression}
import org.apache.spark.sql.catalyst.plan.Rule
import org.apache.spark.sql.catalyst.plans.QueryPlan
import org.apache.spark.sql.catalyst.plans.logical.{QueryPlanAssembler, QueryPlanVisitor}
import org.apache.spark.sql.catalyst.plans.logical.visitor
import org.apache.spark.sql.catalyst.rules.RuleExecutor
import org.apache.spark.sql.catalyst.rules.RuleLogger
/**
* Rule that checks that a ROW_NUMBER() OVER () expression appears as the child of a ROW_NUMBER
* expression, and that all non-ROW_NUMBER attributes are immediately followed by ROW_NUMBER.
class UnwindRowsRule extends Rule[QueryPlan] with RuleLogger {
private val logger: Logger = Log
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