Examples with MergingRowSource com.questdb.ql.latest.MergingRowSource used on opensource projects

Example 1 with MergingRowSource

use of com.questdb.ql.latest.MergingRowSource in project questdb by bluestreak01.

the class MergingRowSourceTest method testMerge.

@Test
public void testMerge() throws JournalException, NumericException {
    try (JournalWriter<Quote> w = getFactory().writer(Quote.class)) {
        TestUtils.generateQuoteData(w, 100000, DateFormatUtils.parseDateTime("2014-02-11T00:00:00.000Z"), 10);
        RowSource srcA = new KvIndexSymLookupRowSource("sym", "BP.L", true);
        RowSource srcB = new KvIndexSymLookupRowSource("sym", "WTB.L", true);
        try (RecordSource rs = new JournalRecordSource(new JournalPartitionSource(w.getMetadata(), true), new MergingRowSource(srcA, srcB))) {
            long last = 0;
            RecordCursor c = rs.prepareCursor(getFactory());
            try {
                int ts = rs.getMetadata().getColumnIndex("timestamp");
                while (c.hasNext()) {
                    long r = c.next().getDate(ts);
                    Assert.assertTrue(r > last);
                    last = r;
                }
            } finally {
                c.releaseCursor();
            }
        }
    }
}