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https://issues.apache.org/jira/browse/FLINK-10281?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16610804#comment-16610804
]
ASF GitHub Bot commented on FLINK-10281:
----------------------------------------
yanghua closed pull request #6659: [FLINK-10281] [table] Table function parse
regular expression contains backslash failed
URL: https://github.com/apache/flink/pull/6659
This is a PR merged from a forked repository.
As GitHub hides the original diff on merge, it is displayed below for
the sake of provenance:
As this is a foreign pull request (from a fork), the diff is supplied
below (as it won't show otherwise due to GitHub magic):
diff --git
a/flink-libraries/flink-table/src/main/scala/org/apache/flink/table/expressions/ExpressionParser.scala
b/flink-libraries/flink-table/src/main/scala/org/apache/flink/table/expressions/ExpressionParser.scala
index c0a577dccfd..3ed627a3e03 100644
---
a/flink-libraries/flink-table/src/main/scala/org/apache/flink/table/expressions/ExpressionParser.scala
+++
b/flink-libraries/flink-table/src/main/scala/org/apache/flink/table/expressions/ExpressionParser.scala
@@ -186,7 +186,7 @@ object ExpressionParser extends JavaTokenParsers with
PackratParsers {
}
lazy val singleQuoteStringLiteral: Parser[Expression] =
- ("'" + """([^'\p{Cntrl}\\]|\\[\\'"bfnrt]|\\u[a-fA-F0-9]{4})*""" + "'").r
^^ {
+ ("'" + """([^'\p{Cntrl}]|\\[\\'"bfnrt]|\\u[a-fA-F0-9]{4})*""" + "'").r ^^ {
str => Literal(str.substring(1, str.length - 1))
}
diff --git
a/flink-libraries/flink-table/src/test/scala/org/apache/flink/table/expressions/LiteralTest.scala
b/flink-libraries/flink-table/src/test/scala/org/apache/flink/table/expressions/LiteralTest.scala
index 0a60eae0e5f..8a839c0799c 100644
---
a/flink-libraries/flink-table/src/test/scala/org/apache/flink/table/expressions/LiteralTest.scala
+++
b/flink-libraries/flink-table/src/test/scala/org/apache/flink/table/expressions/LiteralTest.scala
@@ -25,6 +25,8 @@ import org.apache.flink.table.api.Types
import org.apache.flink.table.expressions.utils.{ExpressionTestBase, Func3}
import org.apache.flink.table.functions.ScalarFunction
import org.apache.flink.types.Row
+
+import org.junit.Assert.assertEquals
import org.junit.Test
class LiteralTest extends ExpressionTestBase {
@@ -88,6 +90,19 @@ class LiteralTest extends ExpressionTestBase {
s"42 and $hello")
}
+ @Test
+ def testParseRegularExpression(): Unit = {
+ assertEquals(
+ "foo([\\w]+)",
+
(ExpressionParser.parseExpression("'foothebar'.regexExtract('foo([\\w]+)', 1)"))
+ .asInstanceOf[Call].args(1).asInstanceOf[Literal].value)
+
+ assertEquals(
+ "\\d{3}",
+ (ExpressionParser.parseExpression("'123'.similar('\\d{3}')"))
+ .asInstanceOf[Call].args(1).asInstanceOf[Literal].value)
+ }
+
def testData: Any = {
val testData = new Row(4)
testData.setField(0, "trUeX_value")
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> Table function parse regular expression contains backslash failed
> -----------------------------------------------------------------
>
> Key: FLINK-10281
> URL: https://issues.apache.org/jira/browse/FLINK-10281
> Project: Flink
> Issue Type: Bug
> Components: Table API & SQL
> Reporter: vinoyang
> Assignee: vinoyang
> Priority: Major
> Labels: pull-request-available
>
> for example, regular expression matches text ("\w") or number ("\d") :
> {code:java}
> testAllApis(
> "foothebar".regexExtract("foo([\\w]+)", 1), //OK, the method got
> 'foo([\w]+)'
> "'foothebar'.regexExtract('foo([\\\\w]+)', 1)", //failed, the method got
> 'foo([\\w]+)' returns "", but if pass 'foo([\\w]+)' would get compile error.
> "REGEX_EXTRACT('foothebar', 'foo([\\\\w]+)', 1)", //OK, the method got
> 'foo([\w]+)' but must pass four '\'
> "thebar"
> )
> {code}
> the "similar to" function has the same issue.
>
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