Examples with Column com.teradata.tpcds.column.Column used on opensource projects

Example 1 with Column

use of com.teradata.tpcds.column.Column in project presto by prestodb.

the class TpcdsMetadata method getTableMetadata.

private static ConnectorTableMetadata getTableMetadata(String schemaName, Table tpcdsTable) {
    ImmutableList.Builder<ColumnMetadata> columns = ImmutableList.builder();
    for (Column column : tpcdsTable.getColumns()) {
        columns.add(new ColumnMetadata(column.getName(), getPrestoType(column.getType())));
    }
    SchemaTableName tableName = new SchemaTableName(schemaName, tpcdsTable.getName());
    return new ConnectorTableMetadata(tableName, columns.build());
}

Example 2 with Column

use of com.teradata.tpcds.column.Column in project presto by prestodb.

the class TpcdsRecordSetProvider method getRecordSet.

private RecordSet getRecordSet(Table table, List<? extends ColumnHandle> columns, double scaleFactor, int partNumber, int totalParts, boolean noSexism) {
    ImmutableList.Builder<Column> builder = ImmutableList.builder();
    for (ColumnHandle column : columns) {
        String columnName = ((TpcdsColumnHandle) column).getColumnName();
        builder.add(table.getColumn(columnName));
    }
    Session session = Session.getDefaultSession().withScale(scaleFactor).withParallelism(totalParts).withChunkNumber(partNumber + 1).withTable(table).withNoSexism(noSexism);
    Results results = constructResults(table, session);
    return new TpcdsRecordSet(results, builder.build());
}

Example 3 with Column

use of com.teradata.tpcds.column.Column in project presto by prestodb.

the class TableStatisticsRecorder method recordStatistics.

public TableStatisticsData recordStatistics(Table table, double scaleFactor) {
    Session session = Session.getDefaultSession().withScale(scaleFactor).withParallelism(1).withNoSexism(false);
    List<Column> columns = ImmutableList.copyOf(table.getColumns());
    RecordCursor recordCursor = new TpcdsRecordSet(Results.constructResults(table, session), columns).cursor();
    List<ColumnStatisticsRecorder> statisticsRecorders = createStatisticsRecorders(columns);
    long rowCount = 0;
    while (recordCursor.advanceNextPosition()) {
        rowCount++;
        for (int columnId = 0; columnId < columns.size(); columnId++) {
            Comparable<?> value = getPrestoValue(recordCursor, columns, columnId);
            statisticsRecorders.get(columnId).record(value);
        }
    }
    Map<String, ColumnStatisticsData> columnSampleStatistics = IntStream.range(0, columns.size()).boxed().collect(toImmutableMap(i -> columns.get(i).getName(), i -> statisticsRecorders.get(i).getRecording()));
    return new TableStatisticsData(rowCount, columnSampleStatistics);
}

Example 4 with Column

use of com.teradata.tpcds.column.Column in project presto by prestodb.

the class TableStatisticsRecorder method getPrestoValue.

private Comparable<?> getPrestoValue(RecordCursor recordCursor, List<Column> columns, int columnId) {
    if (recordCursor.isNull(columnId)) {
        return null;
    }
    Column column = columns.get(columnId);
    ColumnType.Base baseType = column.getType().getBase();
    switch(baseType) {
        case IDENTIFIER:
        case INTEGER:
        case DATE:
        case TIME:
        case DECIMAL:
            return recordCursor.getLong(columnId);
        case VARCHAR:
        case CHAR:
            return recordCursor.getSlice(columnId).toStringAscii();
    }
    throw new UnsupportedOperationException(format("Unsupported TPCDS base type [%s]", baseType));
}