[GitHub] spark pull request #18421: [SPARK-21213][SQL] Support collecting partition-l...

[wzhfy <gi...@git.apache.org>]

Github user wzhfy commented on a diff in the pull request:

    https://github.com/apache/spark/pull/18421#discussion_r125152161
  
    --- Diff: sql/core/src/main/scala/org/apache/spark/sql/execution/SparkSqlParser.scala ---
    @@ -91,29 +91,44 @@ class SparkSqlAstBuilder(conf: SQLConf) extends AstBuilder(conf) {
     
       /**
        * Create an [[AnalyzeTableCommand]] command or an [[AnalyzeColumnCommand]] command.
    -   * Example SQL for analyzing table :
    +   * Example SQL for analyzing table or a set of partitions :
        * {{{
    -   *   ANALYZE TABLE table COMPUTE STATISTICS [NOSCAN];
    +   *   ANALYZE TABLE [db_name.]tablename [PARTITION (partcol1[=val1], partcol2[=val2], ...)]
    +   *   COMPUTE STATISTICS [NOSCAN];
        * }}}
    +   *
        * Example SQL for analyzing columns :
        * {{{
    -   *   ANALYZE TABLE table COMPUTE STATISTICS FOR COLUMNS column1, column2;
    +   *   ANALYZE TABLE [db_name.]tablename COMPUTE STATISTICS FOR COLUMNS column1, column2;
        * }}}
        */
       override def visitAnalyze(ctx: AnalyzeContext): LogicalPlan = withOrigin(ctx) {
    -    if (ctx.partitionSpec != null) {
    -      logWarning(s"Partition specification is ignored: ${ctx.partitionSpec.getText}")
    +    if (ctx.identifier != null &&
    +        ctx.identifier.getText.toLowerCase(Locale.ROOT) != "noscan") {
    +      throw new ParseException(s"Expected `NOSCAN` instead of `${ctx.identifier.getText}`", ctx)
         }
    -    if (ctx.identifier != null) {
    -      if (ctx.identifier.getText.toLowerCase(Locale.ROOT) != "noscan") {
    -        throw new ParseException(s"Expected `NOSCAN` instead of `${ctx.identifier.getText}`", ctx)
    +
    +    val partitionSpec =
    +      if (ctx.partitionSpec != null) {
    +        val filteredSpec = visitPartitionSpec(ctx.partitionSpec).filter(x => x._2.isDefined)
    +        if (filteredSpec.isEmpty) {
    +          None
    +        } else {
    +          Some(filteredSpec.mapValues(v => v.get))
    --- End diff --
    
    `mapValues(_.get)`


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