3.1 driver broke float handling for nan/inf

ResultSet.getFloat and ResultSet.getObject(Float.class) did not agree with each other

Author: grantatspothero

clickhouse-jdbc/src/main/java/ru/yandex/clickhouse/response/parser/ClickHouseFloatParser.java

@@ -0,0 +1,58 @@
+package ru.yandex.clickhouse.response.parser;
+
+import java.sql.SQLException;
+import java.util.TimeZone;
+
+import ru.yandex.clickhouse.except.ClickHouseUnknownException;
+import ru.yandex.clickhouse.response.ByteFragment;
+import ru.yandex.clickhouse.response.ClickHouseColumnInfo;
+
+final class ClickHouseFloatParser extends ClickHouseValueParser<Float> {
+
+    private static ClickHouseFloatParser instance;
+
+    static ClickHouseFloatParser getInstance() {
+        if (instance == null) {
+            instance = new ClickHouseFloatParser();
+        }
+        return instance;
+    }
+
+    private ClickHouseFloatParser() {
+        // prevent instantiation
+    }
+
+    @Override
+    public Float parse(ByteFragment value, ClickHouseColumnInfo columnInfo,
+        TimeZone resultTimeZone) throws SQLException
+    {
+        if (value.isNull()) {
+            return null;
+        }
+        if (value.isNaN()) {
+            return Float.valueOf(Float.NaN);
+        }
+        String s = value.asString();
+        switch (s) {
+            case "+inf":
+            case "inf":
+                return Float.valueOf(Float.POSITIVE_INFINITY);
+            case "-inf":
+                return Float.valueOf(Float.NEGATIVE_INFINITY);
+            default:
+                try {
+                    return Float.valueOf(s);
+                } catch (NumberFormatException nfe) {
+                    throw new ClickHouseUnknownException(
+                        "Error parsing '" + s + "' as Float",
+                        nfe);
+                }
+        }
+    }
+
+    @Override
+    protected Float getDefaultValue() {
+        return Float.valueOf(0);
+    }
+
+}

clickhouse-jdbc/src/main/java/ru/yandex/clickhouse/response/parser/ClickHouseValueParser.java

@@ -41,10 +41,7 @@ public abstract class ClickHouseValueParser<T> {
             Boolean.FALSE);
         register(Date.class, ClickHouseSQLDateParser.getInstance());
         register(Double.class, ClickHouseDoubleParser.getInstance());
-        register(Float.class,
-            Float::valueOf,
-            Float.valueOf(0f),
-            Float.valueOf(Float.NaN));
+        register(Float.class, ClickHouseFloatParser.getInstance());
         register(Instant.class, ClickHouseInstantParser.getInstance());
         register(Integer.class, Integer::decode, Integer.valueOf(0));
         register(LocalDate.class, ClickHouseLocalDateParser.getInstance());
@@ -152,8 +149,8 @@ public static final double parseDouble(ByteFragment value, ClickHouseColumnInfo
     public static final float parseFloat(ByteFragment value, ClickHouseColumnInfo columnInfo)
         throws SQLException
     {
-        Double d = getParser(Double.class).parse(value, columnInfo, null);
-        return d != null ? d.floatValue() : 0.0f;
+        Float f = getParser(Float.class).parse(value, columnInfo, null);
+        return f != null ? f.floatValue() : 0.0f;
     }
 
     /**

clickhouse-jdbc/src/test/java/ru/yandex/clickhouse/response/ClickHouseResultSetTest.java

@@ -167,6 +167,7 @@ public void withTotals() throws Exception {
         assertEquals(70511139L, rs.getLong(2));
     }
 
+    @Test
     public void withTotalsAndEmptyStrings() throws Exception {
         String response = "SiteName\tCountry\n" +
           "String\tString\n" +
@@ -266,6 +267,60 @@ public void withTotalsSingleIntColumn() throws Exception {
         assertEquals(0L, rs.getLong(1));
     }
 
+    @Test
+    public void withTotalsSingleFloatColumn() throws Exception {
+        String response =
+                "Code\n"
+                        + "Float32\n"
+                        + "1.0\n"
+                        + "NaN\n"
+                        + "nan\n"
+                        + "Infinity\n"
+                        + "+Infinity\n"
+                        + "-Infinity\n"
+                        + "inf\n"
+                        + "+inf\n"
+                        + "-inf\n"
+                        + "\n"  // with totals separator row
+                        + "0"; // with totals values row
+
+        ByteArrayInputStream is = new ByteArrayInputStream(response.getBytes("UTF-8"));
+
+        ClickHouseResultSet rs = buildResultSet(is, 1024, "db", "table", true, null, null, props);
+
+        rs.next();
+        assertEquals(1f, rs.getObject(1));
+
+        rs.next();
+        assertTrue(Float.isNaN((Float) rs.getObject(1)));
+
+        rs.next();
+        assertTrue(Float.isNaN((Float) rs.getObject(1)));
+
+        rs.next();
+        assertEquals(Float.POSITIVE_INFINITY, rs.getObject(1));
+
+        rs.next();
+        assertEquals(Float.POSITIVE_INFINITY, rs.getObject(1));
+
+        rs.next();
+        assertEquals(Float.NEGATIVE_INFINITY, rs.getObject(1));
+
+        rs.next();
+        assertEquals(Float.POSITIVE_INFINITY, rs.getObject(1));
+
+        rs.next();
+        assertEquals(Float.POSITIVE_INFINITY, rs.getObject(1));
+
+        rs.next();
+        assertEquals(Float.NEGATIVE_INFINITY, rs.getObject(1));
+
+        assertFalse(rs.next());
+
+        rs.getTotals();
+        assertEquals(0L, rs.getLong(1));
+    }
+
     @Test
     public void withTotalsSingleNullableColumn() throws Exception {
         String response =

clickhouse-jdbc/src/test/java/ru/yandex/clickhouse/response/parser/ClickHouseValueParserTest.java

@@ -1,7 +1,7 @@
 package ru.yandex.clickhouse.response.parser;
 
 import java.sql.SQLException;
-
+import org.testng.annotations.DataProvider;
 import org.testng.annotations.Test;
 
 import ru.yandex.clickhouse.response.ByteFragment;
@@ -13,6 +13,40 @@
 import static org.testng.Assert.fail;
 
 public class ClickHouseValueParserTest {
+    /**
+     * Generates test data for floats.
+     */
+    @DataProvider(name = "float_test_data")
+    public Object[][] floatTestData() {
+        return new Object [][] {
+                {"100.0", 100.0f},
+                {"NaN", Float.NaN},
+                {"Infinity", Float.POSITIVE_INFINITY},
+                {"+Infinity", Float.POSITIVE_INFINITY},
+                {"-Infinity", Float.NEGATIVE_INFINITY},
+                {"nan", Float.NaN},
+                {"inf", Float.POSITIVE_INFINITY},
+                {"+inf", Float.POSITIVE_INFINITY},
+                {"-inf", Float.NEGATIVE_INFINITY}
+        };
+    }
+
+    /**
+     * Generates test data for doubles.
+     */
+    @DataProvider(name = "double_test_data")
+    public Object[][] doubleTestData() {
+        return new Object [][] {
+                {"100.0", 100.0d},
+                {"Infinity", Double.POSITIVE_INFINITY},
+                {"+Infinity", Double.POSITIVE_INFINITY},
+                {"-Infinity", Double.NEGATIVE_INFINITY},
+                {"nan", Double.NaN},
+                {"inf", Double.POSITIVE_INFINITY},
+                {"+inf", Double.POSITIVE_INFINITY},
+                {"-inf", Double.NEGATIVE_INFINITY}
+        };
+    }
 
     @Test
     public void testParseInt() throws Exception {
@@ -161,4 +195,65 @@ public void testParseBoolean() throws SQLException {
         assertFalse(ClickHouseValueParser.parseBoolean(ByteFragment.fromString(" true"), columnInfo));
     }
 
+    @Test (dataProvider = "float_test_data")
+    public void testParseFloat(String byteFragmentString, Float expectedValue) throws SQLException {
+        ClickHouseColumnInfo columnInfo = ClickHouseColumnInfo.parse("Float32", "columnName", null);
+        float floatDelta = 0.001f;
+        if (expectedValue.isNaN()) {
+            assertTrue(Float.isNaN(ClickHouseValueParser.parseFloat(
+                    ByteFragment.fromString(byteFragmentString), columnInfo)
+            ));
+        } else {
+            assertEquals(ClickHouseValueParser.parseFloat(
+                    ByteFragment.fromString(byteFragmentString), columnInfo), expectedValue, floatDelta
+            );
+        }
+    }
+
+    @Test (dataProvider = "double_test_data")
+    public void testParseDouble(String byteFragmentString, Double expectedValue) throws SQLException {
+        ClickHouseColumnInfo columnInfo = ClickHouseColumnInfo.parse("Float64", "columnName", null);
+        double doubleDelta = 0.001;
+        if (expectedValue.isNaN()) {
+            assertTrue(Double.isNaN(ClickHouseValueParser.parseDouble(
+                    ByteFragment.fromString(byteFragmentString), columnInfo)
+            ));
+        } else {
+            assertEquals(ClickHouseValueParser.parseDouble(
+                    ByteFragment.fromString(byteFragmentString), columnInfo), expectedValue, doubleDelta
+            );
+        }
+    }
+
+    @Test (dataProvider = "float_test_data")
+    public void testGetParserFloat(String byteFragmentString, Float expectedValue) throws SQLException {
+        ClickHouseColumnInfo columnInfo = ClickHouseColumnInfo.parse("Float32", "columnName", null);
+        float floatDelta = 0.001f;
+
+        if (expectedValue.isNaN()) {
+            assertTrue(Float.isNaN(ClickHouseValueParser.getParser(Float.class).parse(
+                    ByteFragment.fromString(byteFragmentString), columnInfo, null)
+            ));
+        } else {
+            assertEquals(ClickHouseValueParser.getParser(Float.class).parse(
+                    ByteFragment.fromString(byteFragmentString), columnInfo, null), expectedValue, floatDelta
+            );
+        }
+    }
+
+    @Test (dataProvider = "double_test_data")
+    public void testGetParserDouble(String byteFragmentString, Double expectedValue) throws SQLException {
+        ClickHouseColumnInfo columnInfo = ClickHouseColumnInfo.parse("Float64", "columnName", null);
+        double doubleDelta = 0.001d;
+
+        if (expectedValue.isNaN()) {
+            assertTrue(Double.isNaN(ClickHouseValueParser.getParser(Double.class).parse(
+                    ByteFragment.fromString(byteFragmentString), columnInfo, null)
+            ));
+        } else {
+            assertEquals(ClickHouseValueParser.getParser(Double.class).parse(
+                    ByteFragment.fromString(byteFragmentString), columnInfo, null), expectedValue, doubleDelta
+            );
+        }
+    }
 }