huosenyuan commented on issue #9252:
URL: https://github.com/apache/shardingsphere/issues/9252#issuecomment-773809394
~~~
<dependency>
<groupId>org.apache.shardingsphere</groupId>
<artifactId>shardingsphere-jdbc-core-spring-boot-starter</artifactId>
<version>5.0.0-RC1-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>org.apache.shardingsphere</groupId>
<artifactId>shardingsphere-sql-parser-hsqldb</artifactId>
<version>5.0.0-RC1-SNAPSHOT</version>
</dependency>
~~~
After I customize the hsql dialect, I execute the query SQL, and a null
pointer appears here. This is my modified code. I don't know if it's a bug
~~~
package org.apache.shardingsphere.driver.jdbc.core.resultset;
...
/**
* ShardingSphere result set.
*/
public final class ShardingSphereResultSet extends AbstractResultSetAdapter {
private final MergedResult mergeResultSet;
private final Map<String, Integer> columnLabelAndIndexMap;
public ShardingSphereResultSet(final List<ResultSet> resultSets, final
MergedResult mergeResultSet, final Statement statement, final ExecutionContext
executionContext) throws SQLException {
super(resultSets, statement, executionContext);
if (Objects.nonNull(resultSets.get(0))) {
this.mergeResultSet = mergeResultSet;
this.columnLabelAndIndexMap = createColumnLabelAndIndexMap(
resultSets.get(0).getMetaData());
} else {
this.columnLabelAndIndexMap = new HashMap<>();
this.mergeResultSet = new MergedResult() {
@Override
public boolean next() throws SQLException {
return false;
}
@Override
public Object getValue(int columnIndex, Class<?> type)
throws SQLException {
return null;
}
@Override
public Object getCalendarValue(int columnIndex, Class<?>
type, Calendar calendar) throws SQLException {
return null;
}
@Override
public InputStream getInputStream(int columnIndex, String
type) throws SQLException {
return null;
}
@Override
public boolean wasNull() throws SQLException {
return true;
}
};
}
}
~~~
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