Question

我有一个输入字符串：

"SQLSELECT SELECT location_id, department_name "Department" FROM tttt UNION SQLSELECT SELECT location_id, warehouse_name FROM warehouses EXCEPT SQLSELECT SELECT location_id, department_name "Department" FROM XYZ UNION ALL SQLSELECT SELECT location_id, warehouse_name FROM PQR INTERSECT SQLSELECT SELECT location_id, warehouse_name FROM ABC".

我想要这种格式的输出字符串：

"UNION 
SQLSELECT SELECT location_id, department_name "Department" FROM tttt  
EXCEPT 
SQLSELECT SELECT location_id, warehouse_name FROM warehouses  
UNION ALL 
SQLSELECT SELECT location_id, department_name "Department" FROM XYZ   
INTERSECT 
SQLSELECT SELECT location_id, warehouse_name FROM PQR   
SQLSELECT SELECT location_id, warehouse_name FROM ABC"

如果我首先找到union，然后用union分割行，那么我想递归地执行它，即

＆＃34; SQLSELECT SELECT location_id，department_name＆＃34; Department＆＃34; FROM tttt UNION SQLSELECT SELECT location_id，warehouse_name FROM warehouses EXCEPT SQLSELECT SELECT location_id，department_name＆＃34; Department＆＃34;来自XYZ＆＃34;

然后应该在数组中添加＆＃34; SQLSELECT SELECT location_id，department_name＆＃34; Department＆＃34;从tttt UNION＆＃34;

然后对于下一个循环，如果找不到则检查union，然后检查EXCEPT并拆分字符串并添加

＆＃34; SQLSELECT SELECT location_id，warehouse_name FROM warehouses EXCEPT＆＃34;在数组中等等。

我想最终输出就像

＆＃34; UNION     SQLSELECT SELECT location_id，department_name＆＃34; Department＆＃34;来自tttt
    除了     SQLSELECT SELECT location_id，warehouse_name FROM仓库
    UNION ALL     SQLSELECT SELECT location_id，department_name＆＃34; Department＆＃34;来自XYZ
    相交     SQLSELECT SELECT location_id，warehouse_name FROM PQR
    SQLSELECT SELECT location_id，warehouse_name FROM ABC＆＃34;

我的代码是：

                if (sTempLine.Trim().ToUpper().StartsWith("SQLSELECT") && (sTempLine.Trim().ToUpper().Contains("UNION") || sTempLine.Trim().ToUpper().Contains("UNION ALL") || sTempLine.Trim().ToUpper().Contains("INTERSECT") || sTempLine.Trim().ToUpper().Contains("EXCEPT") || sTempLine.Trim().ToUpper().Contains("MINUS")))
                {
                    index = sTempLine.ToUpper().Trim().IndexOf("UNION");
                    //sTempLine = sTempLine.Trim().Substring(0,index);

                    for (int i=0; i < sTempLine.Length; i++)
                    {
                        index = sTempLine.ToUpper().IndexOf("UNION");
                        if (sTempLine.Contains("UNION"))
                        {
                            if (index > 0)
                            {
                                listInput.Add(sTempLine.Substring(0, index + 5));
                                listInput.Add(sTempLine.Substring(index + 5));
                                sTempLine = sTempLine.Substring(index + 5);
                                continue;
                            }
                        }
                        if (sTempLine.Contains("UNION ALL"))
                        {
                            if (index > 0)
                            {
                                listInput.Add(sTempLine.Substring(0, index + 9));
                                listInput.Add(sTempLine.Substring(index + 9));
                                sTempLine = sTempLine.Substring(index + 9);
                                continue;
                            }
                        }
                        if (sTempLine.Contains("INTERSECT"))
                        {
                            if (index > 0)
                            {
                                listInput.Add(sTempLine.Substring(0, index + 9));
                                listInput.Add(sTempLine.Substring(index + 9));
                                sTempLine = sTempLine.Substring(index + 9);
                                continue;
                            }
                        }
                        if (sTempLine.Contains("EXCEPT"))
                        {
                            if (index > 0)
                            {
                                listInput.Add(sTempLine.Substring(0, index + 6));
                                listInput.Add(sTempLine.Substring(index + 6));
                                sTempLine = sTempLine.Substring(index + 6);
                                continue;
                            }
                        }
                        if (sTempLine.Contains("MINUS"))
                        {
                            if (index > 0)
                            {
                                listInput.Add(sTempLine.Substring(0, index + 5));
                                listInput.Add(sTempLine.Substring(index + 5));
                                sTempLine = sTempLine.Substring(index + 5);
                                continue;
                            }
                        }
                    }
                }
                else
                {

                }

                sbFileWrite.AppendLine(sTempLine + ClsGlobal.Space_Const+ sLineNumber);
            }

Answer 1

 string input = "SASASA EXCEPT ASASA UNION"; // test input here is your input string which is a sql query


            int UnionIndex = input.IndexOf("UNION");

            int ExceptIndex = input.IndexOf("EXCEPT");


            List<string> SplitArray = new List<string>();  // here is the list with the sub strings

            if (UnionIndex < ExceptIndex)
            {
                SplitArray = input.Split(new[] { "UNION" },
                            StringSplitOptions.RemoveEmptyEntries).ToList();
            }
            else if (ExceptIndex < UnionIndex)
            {
                SplitArray= input.Split(new[] { "EXCEPT" },
                            StringSplitOptions.RemoveEmptyEntries).ToList();
            }

如果拳击来UNION然后由UNION分割，如何分割字符串，如果出现EXCEPT然后由EXCEPT分割，依此类推

1 个答案: