Examples of com.facebook.presto.util.MaterializedRow$ApproximateDouble

com.facebook.presto.util.MaterializedRow
Materialize all values in a row Special handling is added for Double types for approximate comparisons

                    }
                    else {
                        throw new AssertionError("unhandled type: " + type);
                    }
                }
                return new MaterializedRow(DEFAULT_PRECISION, row);
            }
        };
    }

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                    }
                    else {
                        throw new AssertionError("unhandled type: " + type);
                    }
                }
                return new MaterializedRow(DEFAULT_PRECISION, row);
            }
        };
    }

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    @Test
    public void testSpecialFloatingPointValues()
            throws Exception
    {
        MaterializedResult actual = computeActual("SELECT nan(), infinity(), -infinity()");
        MaterializedRow row = Iterables.getOnlyElement(actual.getMaterializedRows());
        assertEquals(row.getField(0), Double.NaN);
        assertEquals(row.getField(1), Double.POSITIVE_INFINITY);
        assertEquals(row.getField(2), Double.NEGATIVE_INFINITY);
    }

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                "    SELECT 'abc' as col2a FROM lineitem limit 1000000\n" +
                "  ) table2\n" +
                "  ON table1.col1a = table2.col2a\n" +
                "  WHERE rand() * 1000 > table1.col1b\n" +
                ")");
        MaterializedRow row = Iterables.getOnlyElement(materializedResult.getMaterializedRows());
        assertEquals(row.getFieldCount(), 1);
        long count = (Long) row.getField(0);
        // Technically non-deterministic unit test but has essentially a next to impossible chance of a false positive
        assertTrue(count > 0 && count < 1000000);
    }

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                "  SELECT *\n" +
                "  FROM lineitem\n" +
                "  LIMIT 1000\n" +
                ")\n" +
                "WHERE rand() > 0.5");
        MaterializedRow row = Iterables.getOnlyElement(materializedResult.getMaterializedRows());
        assertEquals(row.getFieldCount(), 1);
        long count = (Long) row.getField(0);
        // Technically non-deterministic unit test but has essentially a next to impossible chance of a false positive
        assertTrue(count > 0 && count < 1000);
    }

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                "  FROM lineitem\n" +
                "  GROUP BY orderkey\n" +
                "  LIMIT 1000\n" +
                ")\n" +
                "WHERE rand() > 0.5");
        MaterializedRow row = Iterables.getOnlyElement(materializedResult.getMaterializedRows());
        assertEquals(row.getFieldCount(), 1);
        long count = (Long) row.getField(0);
        // Technically non-deterministic unit test but has essentially a next to impossible chance of a false positive
        assertTrue(count > 0 && count < 1000);
    }

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        MaterializedResult actual = computeActual("VALUES (0.0/0.0, 1.0/0.0, -1.0/0.0)");


        List<MaterializedRow> rows = actual.getMaterializedRows();
        assertEquals(rows.size(), 1);


        MaterializedRow row = rows.get(0);
        assertTrue(((Double) row.getField(0)).isNaN());
        assertEquals(row.getField(1), Double.POSITIVE_INFINITY);
        assertEquals(row.getField(2), Double.NEGATIVE_INFINITY);
    }

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        MaterializedResult actual = computeActual("VALUES (current_timestamp, now())");


        List<MaterializedRow> rows = actual.getMaterializedRows();
        assertEquals(rows.size(), 1);


        MaterializedRow row = rows.get(0);
        assertEquals(row.getField(0), row.getField(1));
    }

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                    }
                    else {
                        throw new AssertionError("unhandled type: " + type);
                    }
                }
                return new MaterializedRow(MaterializedResult.DEFAULT_PRECISION, row);
            }
        };
    }

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    @Test
    public void testSpecialFloatingPointValues()
            throws Exception
    {
        MaterializedResult actual = computeActual("SELECT nan(), infinity(), -infinity()");
        MaterializedRow row = Iterables.getOnlyElement(actual.getMaterializedRows());
        assertEquals(row.getField(0), Double.NaN);
        assertEquals(row.getField(1), Double.POSITIVE_INFINITY);
        assertEquals(row.getField(2), Double.NEGATIVE_INFINITY);
    }

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