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https://issues.apache.org/jira/browse/IGNITE-22056?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Pavel Pereslegin updated IGNITE-22056:
--------------------------------------
Labels: ignite-3 (was: )
> Jdbc. Incorrect value can be read for a column with Instant.
> ------------------------------------------------------------
>
> Key: IGNITE-22056
> URL: https://issues.apache.org/jira/browse/IGNITE-22056
> Project: Ignite
> Issue Type: Bug
> Reporter: Pavel Pereslegin
> Priority: Major
> Labels: ignite-3
>
> For dates (before 1900), we can get the incorrect value using the
> ResultSet#getTimestamp method (for a column with Instant value (TIMESTAMP
> WITH TIME ZONE) ).
> Reproducer
> {code:java}
> @Test
> public void testTimestamps() throws SQLException {
> // Ignoring time zone.
> TimeZone.setDefault(TimeZone.getTimeZone(ZoneId.of("UTC")));
> try (Connection conn = DriverManager.getConnection(URL)) {
> try (Statement stmt = conn.createStatement()) {
> stmt.execute(
> "CREATE TABLE t (tt_id INT PRIMARY KEY, dt timestamp, ts
> timestamp with local time zone);"
> + "INSERT INTO t VALUES(0, '1581-12-31 00:00:00',
> '1581-12-31 00:00:00')"
> );
> }
> try (Statement stmt = conn.createStatement()) {
> try (ResultSet rs = stmt.executeQuery("select dt, ts from t")) {
> assertTrue(rs.next());
> LocalDateTime ldt =
> LocalDateTime.parse("1581-12-31T00:00:00");
> assertEquals(ldt, rs.getObject("dt"));
> assertEquals(ldt.atOffset(ZoneOffset.UTC).toInstant(),
> rs.getObject("ts"));
> Timestamp tsFromDateTime = rs.getTimestamp("dt");
> Timestamp tsFromTimestamp = rs.getTimestamp("ts");
> assertEquals(tsFromDateTime, tsFromTimestamp); // fails
> // Expected :1581-12-31 00:00:00.0
> // Actual :1581-12-21 00:00:00.0
> }
> }
> }
> }
> {code}
> The main problem is the poor implementation of java.sql.Timestamp.
> To be specific, {{valueOf(LocalDateTime)}} and {{from(Instant)}} constructs
> different timestamps, even for the same dates.
> {code:java}
> TimeZone.setDefault(TimeZone.getTimeZone("UTC"));
> Instant instant = Instant.parse("1581-12-31T00:00:00Z");
> LocalDateTime localDateTime = LocalDateTime.ofInstant(instant,
> ZoneId.of("UTC"));
> Timestamp rightMillisTs = Timestamp.from(instant);
> Timestamp wrongMillisTs = Timestamp.valueOf(localDateTime);
> // This alidation fails.
> assertEquals(rightMillisTs.getTime(), wrongMillisTs.getTime());
> // Expected :-12244176000000
> // Actual :-12243312000000
> {code}
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