add sql to naive parser (#1908)

### What problem does this PR solve?


### Type of change

- [ ] Bug Fix (non-breaking change which fixes an issue)
- [x] New Feature (non-breaking change which adds functionality)

api/utils/file_utils.py

         return FileType.PDF.value
 
     if re.match(
-             r".*\.(eml|doc|docx|ppt|pptx|yml|xml|htm|json|csv|txt|ini|xls|xlsx|wps|rtf|hlp|pages|numbers|key|md|py|js|java|c|cpp|h|php|go|ts|sh|cs|kt|html)$", filename):
+             r".*\.(eml|doc|docx|ppt|pptx|yml|xml|htm|json|csv|txt|ini|xls|xlsx|wps|rtf|hlp|pages|numbers|key|md|py|js|java|c|cpp|h|php|go|ts|sh|cs|kt|html|sql)$", filename):
         return FileType.DOC.value
 
     if re.match(

deepdoc/parser/txt_parser.py

 #
 
 from rag.nlp import find_codec,num_tokens_from_string
+import re
 
 class RAGFlowTxtParser:
     def __call__(self, fnm, binary=None, chunk_token_num=128):
         return self.parser_txt(txt, chunk_token_num)
 
     @classmethod
-    def parser_txt(cls, txt, chunk_token_num=128):
+    def parser_txt(cls, txt, chunk_token_num=128, delimiter="\n!?;。；！？"):
         if type(txt) != str:
             raise TypeError("txt type should be str!")
         sections = []
-        for sec in txt.split("\n"):
+        for sec in re.split(r"[%s]+"%delimiter, txt):
+            if sections and sec in delimiter:
+                sections[-1][0] += sec
+                continue
             if num_tokens_from_string(sec) > 10 * int(chunk_token_num):
-                sections.append((sec[: int(len(sec) / 2)], ""))
-                sections.append((sec[int(len(sec) / 2) :], ""))
+                sections.append([sec[: int(len(sec) / 2)], ""])
+                sections.append([sec[int(len(sec) / 2) :], ""])
             else:
-                sections.append((sec, ""))
+                sections.append([sec, ""])
         return sections

rag/app/naive.py

         excel_parser = ExcelParser()
         sections = [(l, "") for l in excel_parser.html(binary) if l]
 
-    elif re.search(r"\.(txt|py|js|java|c|cpp|h|php|go|ts|sh|cs|kt)$", filename, re.IGNORECASE):
+    elif re.search(r"\.(txt|py|js|java|c|cpp|h|php|go|ts|sh|cs|kt|sql)$", filename, re.IGNORECASE):
         callback(0.1, "Start to parse.")
-        sections = TxtParser()(filename,binary,parser_config.get("chunk_token_num", 128))
+        sections = TxtParser()(filename,binary,
+                               parser_config.get("chunk_token_num", 128),
+                               parser_config.get("delimiter", "\n!?;。；！？"))
         callback(0.8, "Finish parsing.")
     
     elif re.search(r"\.(md|markdown)$", filename, re.IGNORECASE):