Class ShowFilesStmt

fe/src/main/java/org/apache/impala/analysis/ShowFilesStmt.java:54–218

Representation of a SHOW FILES statement. Acceptable syntax: SHOW FILES IN [dbName.]tableName [PARTITION(key=value,...)]

 *
 */
public class ShowFilesStmt extends StatementBase implements SingleTableStmt {
  private final TableName tableName_;

  // Show files for all the partitions if this is null.
  private final PartitionSet partitionSet_;

  // Set during analysis.
  protected FeTable table_;

  // File paths selected by Iceberg's partition filtering
  private List<String> icebergFilePaths_;

  public ShowFilesStmt(TableName tableName, PartitionSet partitionSet) {
    tableName_ = Preconditions.checkNotNull(tableName);
    partitionSet_ = partitionSet;
  }

  @Override
  public String toSql(ToSqlOptions options) {
    StringBuilder strBuilder = new StringBuilder();
    strBuilder.append("SHOW FILES IN " + tableName_.toString());
    if (partitionSet_ != null) strBuilder.append(" " + partitionSet_.toSql(options));
    return strBuilder.toString();
  }

  @Override
  public TableName getTableName() { return tableName_; }

  @Override
  public void collectTableRefs(List<TableRef> tblRefs) {
    tblRefs.add(new TableRef(tableName_.toPath(), null));
  }

  @Override
  public void analyze(Analyzer analyzer) throws AnalysisException {
    // Resolve and analyze table ref to register privilege and audit events
    // and to allow us to evaluate partition predicates.
    TableRef tableRef = new TableRef(tableName_.toPath(), null, Privilege.VIEW_METADATA);
    tableRef = analyzer.resolveTableRef(tableRef);
    if (tableRef instanceof InlineViewRef) {
      throw new AnalysisException(String.format(
          "SHOW FILES not allowed on a view: %s", tableName_));
    }
    if (tableRef instanceof CollectionTableRef) {
      throw new AnalysisException(String.format(
          "SHOW FILES not allowed on a nested collection: %s", tableName_));
    }
    table_ = tableRef.getTable();
    Preconditions.checkNotNull(table_);
    if (!(table_ instanceof FeFsTable) && !(table_ instanceof FeShowFileStmtSupport)) {
      throw new AnalysisException("SHOW FILES is applicable only to file-based tables.");
    }
    tableRef.analyze(analyzer);

    // Analyze the partition spec, if one was specified.
    if (partitionSet_ != null) {
        if (table_ instanceof FeShowFileStmtSupport) {
            FeShowFileStmtSupport showFileStmtSupport = (FeShowFileStmtSupport) table_;