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From "William Dee (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SPARK-12451) Regexp functions don't support patterns containing '*/'
Date Mon, 21 Dec 2015 16:59:46 GMT
William Dee created SPARK-12451:
-----------------------------------

             Summary: Regexp functions don't support patterns containing '*/'
                 Key: SPARK-12451
                 URL: https://issues.apache.org/jira/browse/SPARK-12451
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 1.5.2
            Reporter: William Dee


When using the regexp functions in Spark SQL, patterns containing '*/' create runtime errors
in the auto generated code. This is due to the fact that the code generator creates a multiline
comment containing, amongst other things, the pattern.

Here is an excerpt from my stacktrace to illustrate:

{code}
Caused by: org.codehaus.commons.compiler.CompileException: Line 232, Column 54: Unexpected
token "," in primary
	at org.codehaus.janino.Parser.compileException(Parser.java:3125)
	at org.codehaus.janino.Parser.parsePrimary(Parser.java:2512)
	at org.codehaus.janino.Parser.parseUnaryExpression(Parser.java:2252)
	at org.codehaus.janino.Parser.parseMultiplicativeExpression(Parser.java:2211)
	at org.codehaus.janino.Parser.parseAdditiveExpression(Parser.java:2190)
	at org.codehaus.janino.Parser.parseShiftExpression(Parser.java:2169)
	at org.codehaus.janino.Parser.parseRelationalExpression(Parser.java:2072)
	at org.codehaus.janino.Parser.parseEqualityExpression(Parser.java:2046)
	at org.codehaus.janino.Parser.parseAndExpression(Parser.java:2025)
	at org.codehaus.janino.Parser.parseExclusiveOrExpression(Parser.java:2004)
	at org.codehaus.janino.Parser.parseInclusiveOrExpression(Parser.java:1983)
	at org.codehaus.janino.Parser.parseConditionalAndExpression(Parser.java:1962)
	at org.codehaus.janino.Parser.parseConditionalOrExpression(Parser.java:1941)
	at org.codehaus.janino.Parser.parseConditionalExpression(Parser.java:1922)
	at org.codehaus.janino.Parser.parseAssignmentExpression(Parser.java:1901)
	at org.codehaus.janino.Parser.parseExpression(Parser.java:1886)
	at org.codehaus.janino.Parser.parseBlockStatement(Parser.java:1149)
	at org.codehaus.janino.Parser.parseBlockStatements(Parser.java:1085)
	at org.codehaus.janino.Parser.parseMethodDeclarationRest(Parser.java:938)
	at org.codehaus.janino.Parser.parseClassBodyDeclaration(Parser.java:620)
	at org.codehaus.janino.Parser.parseClassBody(Parser.java:515)
	at org.codehaus.janino.Parser.parseClassDeclarationRest(Parser.java:481)
	at org.codehaus.janino.Parser.parseClassBodyDeclaration(Parser.java:577)
	at org.codehaus.janino.ClassBodyEvaluator.cook(ClassBodyEvaluator.java:229)
	at org.codehaus.janino.SimpleCompiler.cook(SimpleCompiler.java:192)
	at org.codehaus.commons.compiler.Cookable.cook(Cookable.java:84)
	at org.codehaus.commons.compiler.Cookable.cook(Cookable.java:77)
	at org.apache.spark.sql.catalyst.expressions.codegen.CodeGenerator.org$apache$spark$sql$catalyst$expressions$codegen$CodeGenerator$$doCompile(CodeGenerator.scala:387)

... line 232 ...

    /* regexp_replace(input[46, StringType],^.*/,) */
    
    /* input[46, StringType] */
    
    boolean isNull31 = i.isNullAt(46);
    UTF8String primitive32 = isNull31 ? null : (i.getUTF8String(46));
    
    boolean isNull24 = true;
    UTF8String primitive25 = null;
    if (!isNull31) {
      /* ^.*/ */
      
      /* expression: ^.*/ */
      Object obj35 = expressions[4].eval(i);
      boolean isNull33 = obj35 == null;
      UTF8String primitive34 = null;
      if (!isNull33) {
        primitive34 = (UTF8String) obj35;
      }
...
{code}

Note the multiple multiline comments, these obviously break when the regex pattern contains
the end-of-comment token '*/'



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