此篇将所有代码都补充完了，之前发现有的代码写错了，以这篇为准，以下为完整代码，如果发现我有什么考虑不周的地方，可以评论提建议，感谢。代码是想哪写哪，可能比较繁琐，还需要优化。

import re
import os
import tkinter.filedialog
from tkinter import *
class Hive2Presto:
    def __int__(self):
        self.t_funcs = ['substr', 'nvl', 'substring', 'unix_timestamp'] + \
                       ['to_date', 'concat', 'sum', 'avg', 'abs', 'year', 'month', 'ceiling', 'floor']
        self.time_funcs = ['date_add', 'datediff', 'add_months', 'date_sub']
        self.funcs = self.t_funcs + self.time_funcs
        self.current_path = os.path.abspath(__file__)
        self.dir = os.path.dirname(self.current_path)
        self.result = []
        self.error = []
        self.filename = ''
    def main(self):
        self.root = Tk()
        self.root.config(bg='#ff741d')  # 背景颜色设置为公司主题色^_^
        self.root.title('Hive转Presto')
        self.win_width = 550
        self.win_height = 500
        self.screen_width = self.root.winfo_screenwidth()
        self.screen_height = self.root.winfo_screenheight()
        self.x = (self.screen_width - self.win_width) // 2
        self.y = (self.screen_height - self.win_height) // 2
        self.root.geometry(f'{self.win_width}x{self.win_height}+{self.x}+{self.y}')
        font = ('楷体', 11)
        self.button = Button(self.root, text='转换', command=self.trans, bg='#ffcc8c', font=font, anchor='e')
        self.button.grid(row=0, column=0, padx=100, pady=10, sticky=W)
        self.file_button = Button(self.root, text='选择文件', command=self.choose_file, bg='#ffcc8c', font=font,
                                  anchor='e')
        self.file_button.grid(row=0, column=1, padx=0, pady=10, sticky=W)
        self.entry = Entry(self.root, width=65, font=font)
        self.entry.insert(0, '输入Hive代码')
        self.entry.grid(row=1, column=0, padx=10, pady=10, columnspan=2)
        self.entry.bind('', self.delete_text)
        self.text = Text(self.root, width=75, height=20)
        self.text.grid(row=2, column=0, padx=10, pady=10, columnspan=2)
        self.des_label = Label(self.root, text='可以复制结果，也有生成的文件，与选取的文件同文件夹', bg='#ffcc8c',
                               font=('楷体', 10))
        self.des_label.grid(row=3, column=0, padx=10, pady=10, columnspan=2)
        s = ''
        for i in range(0, (n := len(self.funcs)), 4):
            if i + 4 <= n:
                s += ','.join(self.funcs[i:i + 4]) + '\n'
            else:
                s += ','.join(self.funcs[i:]) + '\n'
        s = s[:-1]
        self.des_label1 = Label(self.root, text=s, bg='#ffcc8c',
                                font=('楷体', 10))
        self.des_label1.grid(row=4, column=0, padx=10, pady=10, columnspan=2)
        self.root.columnconfigure(0, minsize=10)
        self.root.columnconfigure(1, minsize=10)
        self.root.columnconfigure(0, pad=5)
        self.root.mainloop()
    def replace_func(self, s, res):
        """
        把搜索到函数整体取出来，处理括号中的参数
        :param s:
        :param res:
        :return:
        """
        for f in res:
            f1 = f.replace('\n', '').strip()
            f1 = re.sub(r'(\(s*)', '(', f1)
            # 搜索括号里的字符串
            if re.findall(r'(\w+)\(', f1):
                func_name = re.findall(r'(\w+)\(', f1)[0].strip()
            else:
                continue
            try:
                if 'date_add' == func_name.lower():
                    date, date_num = self.extact_func(f1, func_name)
                    s_n = f"date_add('day',{date_num},cast(substr(cast{date} as varchar,1,10) as date))"
                    s = s.replace(f, s_n)
                elif 'datediff' == func_name.lower():
                    date1, date2 = self.extact_func(f1, func_name)
                    s_n = f"date_add('day',{date2},cast(substr(cast{date1} as varchar,1,10) as date),cast(substr(cast{date1} as varchar),1,10) as date))"
                    s = s.replace(f, s_n)
                elif 'nvl' == func_name.lower():
                    s1, s2 = self.extact_func(f1, func_name)
                    s_n = f"coalesce({s1},{s2})"
                    s = s.replace(f, s_n)
                elif 'substr' == func_name.lower():
                    date, start, end = self.extact_func(f1, func_name)
                    s_n = f"substr(cast({date} as varchar),{start},{end}"
                    s = s.replace(f, s_n)
                elif 'substring' == func_name.lower():
                    date, start, end = self.extact_func(f1, func_name)
                    s_n = f"substring(cast({date} as varchar),{start},{end}"
                    s = s.replace(f, s_n)
                elif 'unit_timestamp' == func_name.lower():
                    date = self.extact_func(f1, func_name)[0]
                    s_n = f"to_unixtime(cast({date} as timestanp))"
                    s = s.replace(f, s_n)
                elif 'to_date' == func_name.lower():
                    date = self.extact_func(f1, func_name)[0]
                    s_n = f"cast({date} as date)"
                    s = s.replace(f, s_n)
                elif 'concat' == func_name.lower():
                    res = self.extact_func(f1, func_name)[0]
                    s_n = f'concat('
                    for r in res:
                        r = r.strip().replace('\n', '')
                        s_n += f"cast({r} as varchar),"
                    s_n = s_n[:-1] + ')'
                    s = s.replace(f, s_n)
                elif 'sum' == func_name.lower():
                    if 'unix_timestamp' in f1 or 'to_unixtime' in f1:
                        continue
                    ss = self.extact_func(f1, func_name)[0]
                    if 'if(' in ss.replace(' ', ''):
                        continue
                    s = self.func_trans(f, f1, func_name, ss, s)
                elif 'avg' == func_name.lower():
                    if 'unix_timestamp' in f1 or 'to_unixtime' in f1:
                        continue
                    ss = self.extact_func(f1, func_name)[0]
                    if 'if(' in ss.replace(' ', ''):
                        continue
                    s = self.func_trans(f, f1, func_name, ss, s)
                elif 'abs' == func_name.lower():
                    if 'unix_timestamp' in f1 or 'to_unixtime' in f1:
                        continue
                    ss = self.extact_func(f1, func_name)[0]
                    if 'if(' in ss.replace(' ', ''):
                        continue
                    s = self.func_trans(f, f1, func_name, ss, s)
                elif 'ceiling' == func_name.lower():
                    if 'unix_timestamp' in f1 or 'to_unixtime' in f1:
                        continue
                    ss = self.extact_func(f1, func_name)[0]
                    if 'if(' in ss.replace(' ', ''):
                        continue
                    s = self.func_trans(f, f1, func_name, ss, s)
                elif 'floor' == func_name.lower():
                    if 'unix_timestamp' in f1 or 'to_unixtime' in f1:
                        continue
                    ss = self.extact_func(f1, func_name)[0]
                    if 'if(' in ss.replace(' ', ''):
                        continue
                    s = self.func_trans(f, f1, func_name, ss, s)
                elif 'year' == func_name.lower():
                    date = self.extact_func(f1, func_name)[0]
                    s_n = f"year(cast(substr(cast({date} as varchar,1,10) as date))"
                    s = s.replace(f, s_n)
                elif 'month' == func_name.lower():
                    date = self.extact_func(f1, func_name)[0]
                    s_n = f"month(cast(substr(cast({date} as varchar,1,10) as date))"
                    s = s.replace(f, s_n)
                elif 'date_sub' == func_name.lower():
                    date, date_num = self.extact_func(f1, func_name)
                    s_n = f"date_add('day',-{date_num},cast(substr(cast{date} as varchar,1,10) as date))"
                    s = s.replace(f, s_n)
            except:
                self.error.append(f"源代码中{func_name}函数参数输入可能有错误，具体为：{f1}")
                continue
        if self.error:
            self.entry.delete(0, END)
            self.text.delete("1.0", END)
            self.text.insert("end", f"{s}")
            self.error.insert(0, '转换失败，有部分没有转成功\n')
            root_ex = Tk()
            root_ex.title('错误')
            win_width = 600
            win_height = 200
            screen_width = root_ex.winfo_screenwidth()
            screen_height = root_ex.winfo_screenheight()
            x = (screen_width - win_width) // 2
            y = (screen_height - win_height) // 2
            root_ex.geometry(f'{win_width}x{win_height}+{x}+{y}')
            label_ex = Label(root_ex, text="\n".join(self.error), font=("楷体", 10))
            label_ex.pack()
            root_ex.mainloop()
        return s
    def func_trans(self, f, f1, func_name, ss, s):
        if not ('+' in ss or '-' in ss or '*' in ss or '/' in ss):
            date = self.extact_func(f1, func_name)[0]
            s_n = f'{func_name}(cast{date} as double))'
            s = s.replace(f, s_n)
        else:
            res1 = self.mysplit(f1)
            s_n = f
            n = len(s_n)
            for item in res1:
                if any(c.isalpha() for c in item.replace(' ', '')):
                    idxs = s_n.find(item)
                    idxs = [idxs] if type(idxs) != list else idxs
                    for idx in idxs:
                        if idx + len(item) + 3 <= n:
                            if not 'as' in s_n[idx:idx + len(item) + 4]:
                                s_n = re.sub(rf'\b{item}\b', f'cast({item} as double)', s_n)
                        else:
                            s_n = re.sub(rf'\b{item}\b', f'cast({item} as double)', s_n)
                    s = s.replace(f, s_n)
        return s
    def choose_file(self):
        """
        如果代码太多，从text中输入会很卡，直接选择代码文件输入会很快
        :return:
        """
        self.filename = tkinter.filedialog.askopenfilename()
        if '/' in self.filename:
            self.filename = self.filename.replace('/', '\\')
        self.entry.delete(0, END)
        self.entry.insert(0, self.filename)
    def findvar(self, ss):
        """
        搜索与计算有关的字段
        :param ss:
        :return:
        """
        global r1
        b = ['+', '-', '*', '/', '=', '!=', '>', '<', '<=', '>=', '<>']
        result1 = []
        result2 = []
        result1_n = []
        result2_n = []
        res_ops = []
        res1_ops = []
        res_adj = []
        res1_adj = []
        for op in b:
            s_temp1 = ss.replace('\n', ' ')
            s_temp2 = ss.replace('\n', ' ')
            s_temp3 = ss.replace('\n', ' ')
            if op == '/' or op == '=':
                op = op
            elif op == '+' or op == '-' or op == '*' or op == '>' or op == '<':
                op = f'\\{op[0]}'
            else:
                op = f'\\{op[0]}\\{op[1]}'
            parttern = f'\s*-*\d+\s*{op}\s*\w+|' + f'\s*-*\d+\.\s*{op}\s*\w+\.\s*\w+|' \
                       + f'\s*\w+\.\s*\w+\s*{op}\s*\w+\.\s*\w+|' + f'\s*\w+\s*{op}\s*\w+\.\s*\w+|' \
                       + f'\s*\w+\.\s*\w+\s*{op}\s*\w+|' + f'\s*\w+\s*{op}\s*\w+'
            parttern1 = f'\s*\)+\s*{op}\s*\w+|' + f'\s*\)+\s*{op}\s*\w+\.\s*\w+|' \
                        + f'\s*\w+\s*{op}\s*\(+|' + f'f\s*\w+\.\s*{op}\s*\(+'
            parttern2 = f'\s*\w+\s*{op}\s*\w+|' + f'\s*\w+\s*{op}\s*\w+\.\s*\w+|' \
                        + f'\s*\w+\s*{op}\s*\w+|' + f'f\s*\w+\.\s*{op}\s*\w+'
            while True:
                res = re.findall(parttern, s_temp1)
                if not res:
                    break
                result2.extend(res)
                for r in res:
                    r1 = r.replace(' ', '').split(f'op')
                    result1.append(r1)
                    res_ops.append(f'{op}')
                    res_adj.append(False)
                s_temp1 = s_temp1.replace(f'{r1[0]}', '')
            # 搜索带括号的计算
            if op == '+' or op == '-' or op == '*' or op == '/':
                while True:
                    res = re.findall(parttern1, s_temp2)
                    if not res:
                        break
                    result2.extend(res)
                    for r in res:
                        r1 = r.replace(' ', '').split(f'{op}')
                        result1.append(r1)
                        res_ops.append(f'{op}')
                        res_adj.append(False)
                    tem = r1[0] if r1[0].strip() not in ['(', ')'] else r1[1]
                    s_temp2 = s_temp2.replace(f'{tem}', '')
            else:
                res = re.findall(parttern2, s_temp3)
                result2.extend(res)
                for r in res:
                    r1 = r.replace(' ', '').split(f'{op}')
                    result1.append(r1)
                    res_ops.append(f'{op}')
                    res_adj.append(True)
            str_ = re.findall(r'\'([^\']*)\'', ss)
            str_ = list(set(str_))
            str_ = [v.rstrip(' \n') for v in str_]
            for i, fun in enumerate(result1):
                flag = 0
                for item in fun:
                    if any(item.strip() in v for v in str_) or any(item.strip() == v for v in self.t_funcs):
                        break
                    flag += 1
                    if flag == 2 and result1[i] not in result1_n:
                        result1_n.append(result1[i])
                        result2_n.append(result2[i])
                        res1_ops.append(res_ops[i])
                        adj = result1[i][0] in self.time_funcs or result1[i][0] in self.time_funcs
                        res1_adj.append(adj)
            if result1_n:
                z = zip(result1_n, result2_n, res1_ops, res1_adj)
                z1 = sorted(z, key=lambda x: len(x[1].replace(' ', '')), reverse=True)
                result1_n, result2_n, res1_ops, res1_adj = zip(*z1)
            return result1_n, result2_n, res1_ops, res1_adj
    def mysplit(self, s):
        """
        分割字段
        :param s:
        :return:
        """
        s = s.strip().replace(')', '').replace('(', '')
        b = ['+', '-', '*', '/']
        res = [s]
        result = []
        for op in b:
            n_res = []
            for item in res:
                n_res.extend(item.split(op))
            res = n_res
        for item in res:
            if ' as ' not in item:
                result.append(re.findall(r'^[\w+_*]+$', item.replace(' ', ''))[0])
        result = list(set(res))
        return result
    def extact_func(self, s, func_name):
        res = []
        s = s[:-1].replace(f'{func_name}(', '', 1)
        com_idx = [i for i, v in enumerate(s) if v == ',']
        jd_com_idx = []
        for i in com_idx:
            s1 = s[0:i]
            if s1.count('(') == s1.count(')'):
                jd_com_idx.append(i)
        jd_com_idx.append(len(s))
        jd_com_idx.insert(0, -1)
        for i in range(1, len(jd_com_idx)):
            res.append(s[jd_com_idx[i - 1] + 1:jd_com_idx[i]])
        return res
    def sort_funcs(self, li):
        li = sorted(li, key=lambda x: x.count('('), reverse=True)
        li_n = []
        for l in li:
            li_n.append(l)
        return li_n
    def delete_text(self, event):
        self.entry.delete(0, END)
        self.filename = ''
    def trans(self):
        if self.filename:
            data = open(self.filename, 'r', encoding='utf-8').readlines()
            self.folder_path = os.path.dirname(self.filename)
            file_res = self.folder_path + r'\hive转presto_res.sql'
            os.startfile(f'{self.folder_path}')
        else:
            data = self.entry.get().split('\n')
            file_res = self.dir + r'\hive转presto_res.sql'
        data_n = []
        for s in data:
            if not s.rstrip(' \n'):
                continue
            if '”' in s:
                s = s.replace('“', '')
            if '，' in s:
                s = s.replace('，', ',')
            if '（' in s:
                s = s.replace('（', '(')
            if '）' in s:
                s = s.replace('）', ')')
            if (idx := s.find('--')) == -1:
                data_n.append(s + '\n')
            else:
                data_n.append(s[:idx] + '\n')
        data = ''.join(data_n)
        res1, res2, ops, adj = self.findvar(data)
        for i, ss in enumerate(res1):
            s_n = res2[i]
            s_n1 = res2[i]
            s_n2 = res2[i]
            s_t = res2[i]
            flag = 0
            for elem in ss:
                elem1 = elem.replace(' ', '')
                if any(c.isalpha() for c in elem1):
                    if ops[i] in ['=', '!=', '>', '<', '<=', '>=', '<>']:
                        if adj[i]:
                            if elem1 not in self.time_funcs:
                                s_n = re.sub(rf'\b{elem}\b', f'cast(substr({elem1},1,10) as date', s_n)
                                continue
                            else:
                                continue
                        if any(op in s_t for op in ['+', '-', '*', '/']):
                            s_n = re.sub(rf'\b{elem}\b', f'cast({elem1} as double)', s_n)
                        else:
                            s_n = re.sub(rf'\b{elem}\b', f'cast({elem1} as varchar)', s_n)
                    else:
                        if elem.strip() not in ['(', ')']:
                            s_n = re.sub(rf'\b{elem}\b', f'cast({elem1} as double)', s_n)
                    flag += 1
            data = data.replace(res2[i].strip(), s_n)
            if flag == 2:
                if any(op in s_t for op in ['+', '-', '*', '/']):
                    s_n1 = re.sub(rf'\b{ss[0]}\b', f'cast({ss[0]} as double)', s_n)
                    s_n2 = re.sub(rf'\b{ss[1]}\b', f'cast({ss[1]} as double)', s_n)
                else:
                    s_n1 = re.sub(rf'\b{ss[0]}\b', f'cast({ss[0]} as varchar)', s_n)
                    s_n2 = re.sub(rf'\b{ss[1]}\b', f'cast({ss[1]} as varchar)', s_n)
                data = data.replace(s_n1, s_n)
                data = data.replace(s_n2, s_n)
        self.error = []
        self.result = []
        for func_name in self.funcs:
            r = [m.start() for m in re.finditer(func_name, data.lower())]
            for idx in r:
                n = 1
                while True:
                    s = data[idx:idx + n]
                    if (s.count(')') == s.count('(') and s.count(')') != 0) and idx + n > len(data):
                        break
                    n += 1
                if s not in self.result and s.rstrip(' \n')[len(func_name)] == '(':
                    self.result.append(s)
        self.result = self.sort_funcs(self.result)
        res = self.replace_func(data, self.result)
        res_new = []
        for r in res.split('\n'):
            if r.rstrip(' \n'):
                res_new.append(r)
        res_new = '\n'.join(res_new)
        self.text.delete("1.0", END)
        self.text.insert("end", f'{res_new}')
        with open(file_res, 'w', encoding='utf-8') as f:
            f.write(res_new)
if __name__ == '__main__':
    pro = Hive2Presto()
    pro.__int__()
    pro.main()

效果如下所示：