Burak Yavuz created SPARK-18952:
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Summary: regex strings not properly escaped in codegen
Key: SPARK-18952
URL: https://issues.apache.org/jira/browse/SPARK-18952
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 2.0.2
Reporter: Burak Yavuz
If I use the function regexp_extract, and then in my regex string, use `\`,
i.e. escape character, this fails codegen, because the `\` character is not
properly escaped when codegen'd.
Example stack trace:
{code}
/* 059 */ private int maxSteps = 2;
/* 060 */ private int numRows = 0;
/* 061 */ private org.apache.spark.sql.types.StructType keySchema = new
org.apache.spark.sql.types.StructType().add("date_format(window#325.start,
yyyy-MM-dd HH:mm)", org.apache.spark.sql.types.DataTypes.StringType)
/* 062 */ .add("regexp_extract(source#310.description, ([a-zA-Z]+)\[.*,
1)", org.apache.spark.sql.types.DataTypes.StringType);
/* 063 */ private org.apache.spark.sql.types.StructType valueSchema = new
org.apache.spark.sql.types.StructType().add("sum",
org.apache.spark.sql.types.DataTypes.LongType);
/* 064 */ private Object emptyVBase;
...
org.codehaus.commons.compiler.CompileException: File 'generated.java', Line 62,
Column 58: Invalid escape sequence
at org.codehaus.janino.Scanner.scanLiteralCharacter(Scanner.java:918)
at org.codehaus.janino.Scanner.produce(Scanner.java:604)
at org.codehaus.janino.Parser.peekRead(Parser.java:3239)
at org.codehaus.janino.Parser.parseArguments(Parser.java:3055)
at org.codehaus.janino.Parser.parseSelector(Parser.java:2914)
at org.codehaus.janino.Parser.parseUnaryExpression(Parser.java:2617)
at
org.codehaus.janino.Parser.parseMultiplicativeExpression(Parser.java:2573)
at org.codehaus.janino.Parser.parseAdditiveExpression(Parser.java:2552)
{code}
In the codegend expression, the literal should use `\\` instead of `\`
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