Merge pull request #2056 from sunsun314/master-1

#2055 change the function to parse the sql in the right of '~'

src/main/java/com/alibaba/druid/sql/parser/SQLExprParser.java

@@ -693,7 +693,7 @@ public class SQLExprParser extends SQLParser {
                 break;
             case TILDE:
                 lexer.nextToken();
-                SQLExpr unaryValueExpr = expr();
+                SQLExpr unaryValueExpr = primary();
                 SQLUnaryExpr unary = new SQLUnaryExpr(SQLUnaryOperator.Compl, unaryValueExpr);
                 sqlExpr = unary;
                 break;