fix: Backslash escaped single quote '\''

fixes #1812

Signed-off-by: Andreas Reichel <[email protected]>

Author: manticore-projects

src/main/jjtree/net/sf/jsqlparser/parser/JSqlParserCC.jjt

@@ -565,7 +565,14 @@ TOKEN:
               }
             }
             input_stream.backup(image.length() - matchedToken.image.length() );
-        }
+        } else if ( configuration.getAsBoolean(Feature.allowBackslashEscapeCharacter) && matchedToken.image.contains("\\''") ) {
+            for (int i=0;i<CCJSqlParserConstants.tokenImage.length;i++) {
+                if ( CCJSqlParserConstants.tokenImage[i].equals("<S_CHAR_LITERAL>") ) {
+                    matchedToken.kind = i;
+                }
+            }
+            input_stream.backup(image.length() - matchedToken.image.length() );
+      }
     }
 | < S_QUOTED_IDENTIFIER: "\"" ( "\"\"" | ~["\n","\r","\""])* "\"" | "$$" (~["$"])* "$$" | ("`" (~["\n","\r","`"])+ "`") | ( "[" (~["\n","\r","]"])* "]" ) >
     {
@@ -3405,7 +3412,7 @@ Expression LikeExpression(Expression leftExpression) #LikeExpression:
         | token = <K_RLIKE>
         | token = <K_REGEXP>
     ) { result.setLikeKeyWord( LikeExpression.KeyWord.from(token.image)); }
-    [ <K_BINARY> {result.setUseBinary(true); } ]
+    [ LOOKAHEAD(2) <K_BINARY> {result.setUseBinary(true); } ]
     rightExpression=SimpleExpression()
     [ LOOKAHEAD(2) <K_ESCAPE>
         (

src/test/java/net/sf/jsqlparser/statement/select/SelectTest.java

@@ -3266,7 +3266,7 @@ public void testIssue167_singleQuoteEscape(String sqlStr) throws JSQLParserExcep
     }
 
     @ParameterizedTest
-    @ValueSource(strings = {"SELECT '\\'''", "SELECT '\\\\\\''"})
+    @ValueSource(strings = {"SELECT '\\'\\''", "SELECT '\\\\\\''"})
     public void testIssue167_singleQuoteEscape2(String sqlStr) throws JSQLParserException {
         TestUtils.assertSqlCanBeParsedAndDeparsed(sqlStr, true,
                 parser -> parser.withBackslashEscapeCharacter(true));
@@ -5722,4 +5722,28 @@ public void testNotIsNullInFilter() throws JSQLParserException {
         String stmt = "SELECT count(*) FILTER (WHERE i NOT ISNULL) AS filtered FROM tasks";
         assertSqlCanBeParsedAndDeparsed(stmt);
     }
+
+    @Test
+    void testBackSlashQuotationIssue1812() throws JSQLParserException {
+        String sqlStr = "SELECT ('\\'', 'a')";
+        Statement stmt2 = CCJSqlParserUtil.parse(
+                sqlStr
+                , parser -> parser
+                        .withBackslashEscapeCharacter(true)
+        );
+
+        sqlStr = "INSERT INTO recycle_record (a,f) VALUES ('\\'anything', 'abc');";
+        stmt2 = CCJSqlParserUtil.parse(
+                sqlStr
+                , parser -> parser
+                        .withBackslashEscapeCharacter(true)
+        );
+
+        sqlStr = "INSERT INTO recycle_record (a,f) VALUES ('\\'','83653692186728700711687663398101');";
+        stmt2 = CCJSqlParserUtil.parse(
+                sqlStr
+                , parser -> parser
+                        .withBackslashEscapeCharacter(true)
+        );
+    }
 }