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

Example 56 with RecordCursor

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

the class MaxDoubleGroupByFunctionFactoryTest method testAllNull.

@Test
public void testAllNull() throws SqlException {
    compiler.compile("create table tab (f double)", 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 max(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.assertTrue(Double.isNaN(record.getDouble(0)));
        }
    }
}

Example 57 with RecordCursor

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

the class LastIntGroupByFunctionFactoryTest method testSomeNull.

@Test
public void testSomeNull() 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();
            if (i % 4 == 0) {
                r.putInt(0, i);
            }
            r.append();
        }
        w.commit();
    }
    try (RecordCursorFactory factory = compiler.compile("select last(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 58 with RecordCursor

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

the class FirstDoubleGroupByFunctionFactoryTest method testNonNull.

@Test
public void testNonNull() throws SqlException {
    compiler.compile("create table tab (f double)", 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.putDouble(0, rnd.nextDouble());
            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(0.6607777894187332, record.getDouble(0), 0.0001);
        }
    }
}

Example 59 with RecordCursor

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

the class PrefixedClassCatalogueFunctionFactoryTest method testSimple.

@Test
public void testSimple() throws Exception {
    assertMemoryLeak(() -> {
        sink.clear();
        try (RecordCursorFactory factory = compiler.compile("select * from pg_catalog.pg_class() order by relname", sqlExecutionContext).getRecordCursorFactory()) {
            RecordCursor cursor = factory.getCursor(sqlExecutionContext);
            try {
                printer.print(cursor, factory.getMetadata(), true, sink);
                TestUtils.assertEquals("relname\trelnamespace\trelkind\trelowner\toid\trelpartbound\n" + "pg_class\t11\tr\t0\t1259\t\n", sink);
                compiler.compile("create table xyz (a int)", sqlExecutionContext);
                cursor.close();
                cursor = factory.getCursor(sqlExecutionContext);
                sink.clear();
                printer.print(cursor, factory.getMetadata(), true, sink);
                TestUtils.assertEquals("relname\trelnamespace\trelkind\trelowner\toid\trelpartbound\n" + "pg_class\t11\tr\t0\t1259\t\n" + "xyz\t2200\tr\t0\t1\t\n", sink);
                try (Path path = new Path()) {
                    path.of(configuration.getRoot());
                    path.concat("test").$();
                    Assert.assertEquals(0, FilesFacadeImpl.INSTANCE.mkdirs(path, 0));
                }
                compiler.compile("create table автомобилей (b double)", sqlExecutionContext);
                cursor.close();
                cursor = factory.getCursor(sqlExecutionContext);
                sink.clear();
                printer.print(cursor, factory.getMetadata(), true, sink);
                TestUtils.assertEquals("relname\trelnamespace\trelkind\trelowner\toid\trelpartbound\n" + "pg_class\t11\tr\t0\t1259\t\n" + "xyz\t2200\tr\t0\t1\t\n" + "автомобилей\t2200\tr\t0\t2\t\n", sink);
                compiler.compile("drop table автомобилей;", sqlExecutionContext);
                cursor.close();
                cursor = factory.getCursor(sqlExecutionContext);
                sink.clear();
                printer.print(cursor, factory.getMetadata(), true, sink);
                TestUtils.assertEquals("relname\trelnamespace\trelkind\trelowner\toid\trelpartbound\n" + "pg_class\t11\tr\t0\t1259\t\n" + "xyz\t2200\tr\t0\t1\t\n", sink);
            } finally {
                cursor.close();
            }
        }
    });
}

Example 60 with RecordCursor

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

the class UnionRecordCursorFactory method getCursor.

@Override
public RecordCursor getCursor(SqlExecutionContext executionContext) throws SqlException {
    RecordCursor masterCursor = null;
    RecordCursor slaveCursor = null;
    try {
        masterCursor = masterFactory.getCursor(executionContext);
        slaveCursor = slaveFactory.getCursor(executionContext);
        cursor.of(masterCursor, slaveCursor, executionContext);
        return cursor;
    } catch (Throwable ex) {
        Misc.free(masterCursor);
        Misc.free(slaveCursor);
        throw ex;
    }
}