fix(sql-execution): can not set a delimiter longer than 2 (#1414)

Author: yhilmare

client

@@ -28,7 +28,6 @@
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 import java.util.stream.Collectors;
-import java.util.stream.IntStream;
 
 import com.oceanbase.odc.common.lang.Holder;
 import com.oceanbase.odc.common.util.StringUtils;
@@ -633,11 +632,11 @@ private boolean equalsIgnoreCase(char[] src, OrderChar[] dest, int begin, int co
      * 当前SQL是否是以分隔符开头
      */
     private boolean isPrefix(OrderChar[] line, int pos, String delim) {
-        boolean res = IntStream.range(pos, pos + delim.length())
-                .mapToObj(i -> line[i].getCh())
-                .collect(StringBuilder::new, StringBuilder::append, StringBuilder::append)
-                .toString().startsWith(delim);
-
+        StringBuilder builder = new StringBuilder();
+        for (int i = 0; i < line.length - pos; i++) {
+            builder.append(line[pos + i].getCh());
+        }
+        boolean res = builder.toString().startsWith(delim);
         if (!res || !"/".equals(delim) || line.length <= 1) {
             return res;
         }