[jira] [Created] (IMPALA-8497) SQL return ArrayIndexOutOfBoundsException when ends with '\n'

["WangSheng (JIRA)" <ji...@apache.org>]

WangSheng created IMPALA-8497:
---------------------------------

             Summary: SQL return ArrayIndexOutOfBoundsException when ends with '\n'
                 Key: IMPALA-8497
                 URL: https://issues.apache.org/jira/browse/IMPALA-8497
             Project: IMPALA
          Issue Type: Bug
          Components: Frontend
    Affects Versions: Impala 3.2.0
            Reporter: WangSheng


When submit sql with jdbc in code, those sqls return "ArrayIndexOutOfBoundsException" instead of "Syntax error":
{code:java}
show\n
select\n
{code}
This is mainly caused by code below:
{code:java}
//sql-parser.cup
  public String getErrorMsg(String stmt) {
    if (errorToken_ == null || stmt == null) return null;
    String[] lines = stmt.split("\n");
    StringBuffer result = new StringBuffer();
    result.append(getErrorTypeMessage(errorToken_.sym) + " in line ");
    result.append(errorToken_.left);
    result.append(":\n");

    // errorToken_.left is the line number of error.
    // errorToken_.right is the column number of the error.
    String errorLine = lines[errorToken_.left - 1];
    //......
{code}
because these sqls are ends with '\n', the length of 'lines' array is small than 'errorToken_.left - 1', and thus throw ArrayIndexOutOfBoundsException, and this exception cannot be catched.



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