[jira] [Created] (FLINK-18325) SqlMapTypeNameSpec#unparse may throw NPE

[Shang Yuanchun (Jira)]

Jiatao Tao created FLINK-18325:
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             Summary: SqlMapTypeNameSpec#unparse may throw NPE
                 Key: FLINK-18325
                 URL: https://issues.apache.org/jira/browse/FLINK-18325
             Project: Flink
          Issue Type: Bug
          Components: Table SQL / Runtime
            Reporter: Jiatao Tao
         Attachments: image-2020-06-16-18-53-17-462.png

SqlMapTypeNameSpec#unparse call SqlDataTypeSpec#getNullable, and "getNullable" may throw NPE

 
{code:java}
if (!keyType.getNullable()) {
  writer.keyword("NOT NULL");
}
{code}
 

 

See in  SqlDataTypeSpec

 
{code:java}
/** Whether data type allows nulls.
 *
 * <p>Nullable is nullable! Null means "not specified". E.g.
 * {@code CAST(x AS INTEGER)} preserves the same nullability as {@code x}.
 */
private Boolean nullable;
{code}
 

This API is from calcite, and all callers will determine if it is null:

!image-2020-06-16-18-53-17-462.png|width=488,height=114!

 

 



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