improved odps sql parser support

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

@@ -1159,7 +1159,7 @@ public class Lexer {
             return;
         }
 
-        if (isFirstIdentifierChar(first) || first == '{') {
+        if (isFirstIdentifierChar(first) || (first >= '0' && first <= '9') || first == '{') {
             stringVal = null;
             mark = pos;
             while (ch != ';' && ch != EOI) {

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

@@ -5245,7 +5245,7 @@ public class SQLExprParser extends SQLParser {
             }
         } else {
             if (lexer.token == Token.EQ) {
-                if (dbType == DbType.odps) {
+                if (dbType == DbType.odps && (parent instanceof SQLSetStatement || parent == null)) {
                     lexer.nextTokenForSet();
                 } else {
                     lexer.nextToken();