Examples with RecordCursor io.questdb.cairo.sql.RecordCursor used on opensource projects

Example 41 with RecordCursor

use of io.questdb.cairo.sql.RecordCursor in project questdb by bluestreak01.

the class FirstIntGroupByFunctionFactoryTest method testAllNull.

@Test
public void testAllNull() throws SqlException {
    compiler.compile("create table tab (f int)", sqlExecutionContext);
    try (TableWriter w = engine.getWriter(sqlExecutionContext.getCairoSecurityContext(), "tab", "testing")) {
        for (int i = 100; i > 10; i--) {
            TableWriter.Row r = w.newRow();
            r.append();
        }
        w.commit();
    }
    try (RecordCursorFactory factory = compiler.compile("select first(f) from tab", sqlExecutionContext).getRecordCursorFactory()) {
        try (RecordCursor cursor = factory.getCursor(sqlExecutionContext)) {
            Record record = cursor.getRecord();
            Assert.assertEquals(1, cursor.size());
            Assert.assertTrue(cursor.hasNext());
            Assert.assertEquals(Numbers.INT_NaN, record.getInt(0));
        }
    }
}

Example 42 with RecordCursor

use of io.questdb.cairo.sql.RecordCursor in project questdb by bluestreak01.

the class FirstLongGroupByFunctionFactoryTest method testNonNull.

@Test
public void testNonNull() throws SqlException {
    compiler.compile("create table tab (f long)", sqlExecutionContext);
    final Rnd rnd = new Rnd();
    try (TableWriter w = engine.getWriter(sqlExecutionContext.getCairoSecurityContext(), "tab", "testing")) {
        for (int i = 100; i > 10; i--) {
            TableWriter.Row r = w.newRow();
            r.putLong(0, rnd.nextLong());
            r.append();
        }
        w.commit();
    }
    try (RecordCursorFactory factory = compiler.compile("select first(f) from tab", sqlExecutionContext).getRecordCursorFactory()) {
        try (RecordCursor cursor = factory.getCursor(sqlExecutionContext)) {
            Record record = cursor.getRecord();
            Assert.assertEquals(1, cursor.size());
            Assert.assertTrue(cursor.hasNext());
            Assert.assertEquals(4689592037643856L, record.getLong(0));
        }
    }
}

Example 43 with RecordCursor

use of io.questdb.cairo.sql.RecordCursor in project questdb by bluestreak01.

the class FirstLongGroupByFunctionFactoryTest method testSomeNull.

@Test
public void testSomeNull() throws SqlException {
    compiler.compile("create table tab (f long)", sqlExecutionContext);
    try (TableWriter w = engine.getWriter(sqlExecutionContext.getCairoSecurityContext(), "tab", "testing")) {
        for (int i = 100; i > 10; i--) {
            TableWriter.Row r = w.newRow();
            if (i % 4 == 0) {
                r.putLong(0, i);
            }
            r.append();
        }
        w.commit();
    }
    try (RecordCursorFactory factory = compiler.compile("select first(f) from tab", sqlExecutionContext).getRecordCursorFactory()) {
        try (RecordCursor cursor = factory.getCursor(sqlExecutionContext)) {
            Record record = cursor.getRecord();
            Assert.assertEquals(1, cursor.size());
            Assert.assertTrue(cursor.hasNext());
            Assert.assertEquals(100, record.getLong(0));
        }
    }
}

Example 44 with RecordCursor

use of io.questdb.cairo.sql.RecordCursor in project questdb by bluestreak01.

the class FirstTimestampGroupByFunctionFactoryTest method testSomeNull.

@Test
public void testSomeNull() throws SqlException {
    compiler.compile("create table tab (f timestamp)", sqlExecutionContext);
    try (TableWriter w = engine.getWriter(sqlExecutionContext.getCairoSecurityContext(), "tab", "testing")) {
        for (int i = 100; i > 10; i--) {
            TableWriter.Row r = w.newRow();
            if (i % 4 == 0) {
                r.putLong(0, i);
            }
            r.append();
        }
        w.commit();
    }
    try (RecordCursorFactory factory = compiler.compile("select first(f) from tab", sqlExecutionContext).getRecordCursorFactory()) {
        try (RecordCursor cursor = factory.getCursor(sqlExecutionContext)) {
            Record record = cursor.getRecord();
            Assert.assertEquals(1, cursor.size());
            Assert.assertTrue(cursor.hasNext());
            Assert.assertEquals(100, record.getLong(0));
        }
    }
}

Example 45 with RecordCursor

use of io.questdb.cairo.sql.RecordCursor in project questdb by bluestreak01.

the class HaversineDistDegreeGroupByFunctionFactoryTest method test2DistancesAtEquator.

@Test
public void test2DistancesAtEquator() throws SqlException {
    compiler.compile("create table tab1 (lat double, lon double, k timestamp)", sqlExecutionContext);
    compiler.compile("create table tab2 (lat double, lon double, k timestamp)", sqlExecutionContext);
    try (TableWriter w = engine.getWriter(sqlExecutionContext.getCairoSecurityContext(), "tab1", "testing")) {
        double lonDegree = 0;
        long ts = 0;
        for (int i = 0; i < 10; i++) {
            TableWriter.Row r = w.newRow();
            r.putDouble(0, 0);
            r.putDouble(1, lonDegree);
            r.putTimestamp(2, ts);
            r.append();
            lonDegree += 1;
            ts += 10_000_000_000L;
        }
        w.commit();
    }
    try (TableWriter w = engine.getWriter(sqlExecutionContext.getCairoSecurityContext(), "tab2", "testing")) {
        double lonDegree = -180;
        long ts = 0;
        for (int i = 0; i < 10; i++) {
            TableWriter.Row r = w.newRow();
            r.putDouble(0, 0);
            r.putDouble(1, lonDegree);
            r.putTimestamp(2, ts);
            r.append();
            lonDegree += 1;
            ts += 10_000_000_000L;
        }
        w.commit();
    }
    double distance1;
    try (RecordCursorFactory factory = compiler.compile("select haversine_dist_deg(lat, lon, k) from tab1", sqlExecutionContext).getRecordCursorFactory()) {
        try (RecordCursor cursor = factory.getCursor(sqlExecutionContext)) {
            Record record = cursor.getRecord();
            Assert.assertEquals(1, cursor.size());
            Assert.assertTrue(cursor.hasNext());
            distance1 = record.getDouble(0);
        }
    }
    double distance2;
    try (RecordCursorFactory factory = compiler.compile("select haversine_dist_deg(lat, lon, k) from tab2", sqlExecutionContext).getRecordCursorFactory()) {
        try (RecordCursor cursor = factory.getCursor(sqlExecutionContext)) {
            Record record = cursor.getRecord();
            Assert.assertEquals(1, cursor.size());
            Assert.assertTrue(cursor.hasNext());
            distance2 = record.getDouble(0);
        }
    }
    Assert.assertEquals(distance1, distance2, DELTA);
}