Indhumathi27 commented on a change in pull request #3437: [CARBONDATA-3530]
Support Create timeseries MV Datamap with the supported granularity levels.
URL: https://github.com/apache/carbondata/pull/3437#discussion_r347130139
##########
File path:
datamap/mv/core/src/main/scala/org/apache/carbondata/mv/datamap/MVHelper.scala
##########
@@ -840,5 +891,68 @@ object MVHelper {
case _ => outputList
}.get
}
+
+ /**
+ * Validate mv timeseries query for timeseries column and granularity.
+ * TimeSeries udf function will contain data type as TimeStamp/cast as
TimeStamp
+ *
+ * @param logicalPlan to be validated
+ * @param dataMapSchema to check if it is lazy/non-lazy datamap
+ * @return
+ */
+ private def validateMVTimeSeriesQuery(logicalPlan: LogicalPlan,
+ dataMapSchema: DataMapSchema): (String, String) = {
+ var timeSeriesColumn: String = null
+ var granularity: String = null
+ logicalPlan.transformExpressions {
+ case alias@Alias(udf: ScalaUDF, _) =>
+ if (udf.function.isInstanceOf[TimeSeriesFunction]) {
+ if (null == timeSeriesColumn && null == granularity) {
+ udf.children.collect {
+ case attr: AttributeReference =>
+ timeSeriesColumn = attr.name
+ case l: Literal =>
+ granularity = l.value.toString
+ case c: Cast =>
+ c.child match {
+ case attribute: AttributeReference =>
+ if (attribute.dataType.isInstanceOf[DateType]) {
+ timeSeriesColumn = attribute.name
+ }
+ case _ =>
+ }
+ }
+ } else {
+ udf.children.collect {
+ case attr: AttributeReference =>
+ if (!attr.name.equalsIgnoreCase(timeSeriesColumn)) {
+ throw new MalformedCarbonCommandException(
+ "Multiple timeseries udf functions are defined in Select
statement with " +
+ "different timestamp columns")
+ }
+ case l: Literal =>
+ if (!granularity.equalsIgnoreCase(l.value.toString)) {
+ throw new MalformedCarbonCommandException(
+ "Multiple timeseries udf functions are defined in Select
statement with " +
+ "different granularities")
+ }
+ }
+ }
+ }
+ alias
+ }
+ // timeseries column and granularity is not null, then validate
+ if ((null != timeSeriesColumn).&&(null != granularity)) {
Review comment:
okay
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