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Handle NULL in ResultSet's getDate() method (#50184) 

(cherry picked from commit 08214eb1338fef5c8082c3f8b84c24dd53224ebe)
This commit is contained in:
Andrei Stefan 2019-12-17 10:00:54 +02:00 committed by Andrei Stefan
parent ce2aab3f2f
commit c6fdf9ed8a
2 changed files with 58 additions and 4 deletions
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10
x-pack/plugin/sql/jdbc/src/main/java/org/elasticsearch/xpack/sql/jdbc/JdbcResultSet.java
View File

@ -259,6 +259,11 @@ class JdbcResultSet implements ResultSet, JdbcWrapper {
private Long dateTimeAsMillis(int columnIndex) throws SQLException {
Object val = column(columnIndex);
EsType type = columnType(columnIndex);
if (val == null) {
return null;
}
try {
// TODO: the B6 appendix of the jdbc spec does mention CHAR, VARCHAR, LONGVARCHAR, DATE, TIMESTAMP as supported
// jdbc types that should be handled by getDate and getTime methods. From all of those we support VARCHAR and
@ -267,9 +272,6 @@ class JdbcResultSet implements ResultSet, JdbcWrapper {
// the cursor can return an Integer if the date-since-epoch is small enough, XContentParser (Jackson) will
// return the "smallest" data type for numbers when parsing
// TODO: this should probably be handled server side
if (val == null) {
return null;
}
return asDateTimeField(val, JdbcDateUtils::dateTimeAsMillisSinceEpoch, Function.identity());
}
if (DATE == type) {
@ -278,7 +280,7 @@ class JdbcResultSet implements ResultSet, JdbcWrapper {
if (TIME == type) {
return timeAsMillisSinceEpoch(val.toString());
}
return val == null ? null : (Long) val;
return (Long) val;
} catch (ClassCastException cce) {
throw new SQLException(
format(Locale.ROOT, "Unable to convert value [%.128s] of type [%s] to a Long", val, type.getName()), cce);

52
x-pack/plugin/sql/qa/src/main/java/org/elasticsearch/xpack/sql/qa/jdbc/ResultSetTestCase.java
View File

@ -1276,6 +1276,54 @@ public class ResultSetTestCase extends JdbcIntegrationTestCase {
});
}
public void testGettingNullValues() throws Exception {
String query = "SELECT CAST(NULL AS BOOLEAN) b, CAST(NULL AS TINYINT) t, CAST(NULL AS SMALLINT) s, CAST(NULL AS INTEGER) i,"
+ "CAST(NULL AS BIGINT) bi, CAST(NULL AS DOUBLE) d, CAST(NULL AS REAL) r, CAST(NULL AS FLOAT) f, CAST(NULL AS VARCHAR) v,"
+ "CAST(NULL AS DATE) dt, CAST(NULL AS TIME) tm, CAST(NULL AS TIMESTAMP) ts";
doWithQuery(query, (results) -> {
results.next();
assertNull(results.getObject("b"));
assertFalse(results.getBoolean("b"));
assertNull(results.getObject("t"));
assertEquals(0, results.getByte("t"));
assertNull(results.getObject("s"));
assertEquals(0, results.getShort("s"));
assertNull(results.getObject("i"));
assertEquals(0, results.getInt("i"));
assertNull(results.getObject("bi"));
assertEquals(0, results.getLong("bi"));
assertNull(results.getObject("d"));
assertEquals(0.0d, results.getDouble("d"), 0d);
assertNull(results.getObject("r"));
assertEquals(0.0f, results.getFloat("r"), 0f);
assertNull(results.getObject("f"));
assertEquals(0.0f, results.getFloat("f"), 0f);
assertNull(results.getObject("v"));
assertNull(results.getString("v"));
assertNull(results.getObject("dt"));
assertNull(results.getDate("dt"));
assertNull(results.getDate("dt", randomCalendar()));
assertNull(results.getObject("tm"));
assertNull(results.getTime("tm"));
assertNull(results.getTime("tm", randomCalendar()));
assertNull(results.getObject("ts"));
assertNull(results.getTimestamp("ts"));
assertNull(results.getTimestamp("ts", randomCalendar()));
});
}
/*
* Checks StackOverflowError fix for https://github.com/elastic/elasticsearch/pull/31735
*/
@ -1841,4 +1889,8 @@ public class ResultSetTestCase extends JdbcIntegrationTestCase {
private ZoneId getZoneFromOffset(Long randomLongDate) {
return ZoneId.of(ZoneId.of(timeZoneId).getRules().getOffset(Instant.ofEpochMilli(randomLongDate)).toString());
}
private Calendar randomCalendar() {
return Calendar.getInstance(randomTimeZone(), Locale.ROOT);
}
}