Examples with TridentStreamScanRel org.apache.storm.sql.planner.trident.rel.TridentStreamScanRel used on opensource projects

Example 1 with TridentStreamScanRel

use of org.apache.storm.sql.planner.trident.rel.TridentStreamScanRel in project storm by apache.

the class TridentScanRule method convert.

@Override
public RelNode convert(RelNode rel) {
    final TableScan scan = (TableScan) rel;
    int parallelismHint = DEFAULT_PARALLELISM_HINT;
    final ParallelStreamableTable parallelTable = scan.getTable().unwrap(ParallelStreamableTable.class);
    if (parallelTable != null && parallelTable.parallelismHint() != null) {
        parallelismHint = parallelTable.parallelismHint();
    }
    final Table table = scan.getTable().unwrap(Table.class);
    switch(table.getJdbcTableType()) {
        case STREAM:
            return new TridentStreamScanRel(scan.getCluster(), scan.getTraitSet().replace(TridentLogicalConvention.INSTANCE), scan.getTable(), parallelismHint);
        default:
            throw new IllegalArgumentException(String.format("Unsupported table type: %s", table.getJdbcTableType()));
    }
}