improved opds sql support

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

@@ -2255,7 +2255,7 @@ public class Lexer {
             boolean ident = false;
             for (; ; ) {
                 ch = charAt(++pos);
-                if (isEOF()) {
+                if (isEOF() || ch == ';' || ch == '；') {
                     pos--;
                     bufPos--;
                     break;
@@ -2287,7 +2287,7 @@ public class Lexer {
             this.ch = charAt(pos);
 
             if (dbType == DbType.odps) {
-                while (isIdentifierChar(this.ch)) {
+                while (isIdentifierChar(this.ch) && ch != '；') {
                     ++pos;
                     bufPos++;
                     this.ch = charAt(pos);

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

@@ -517,6 +517,17 @@ public class SQLParserUtils {
             if (lexer.identifierEquals("pai") || lexer.identifierEquals("jar")) {
                 return Collections.singletonList(sql);
             }
+
+            if (dbType == DbType.odps) {
+                switch (lexer.token) {
+                    case IF:
+                    case VARIANT:
+                    case WHILE:
+                        return Collections.singletonList(sql);
+                    default:
+                        break;
+                }
+            }
         }
 
         List list = new ArrayList();