SQL解析器：-获取表和列名称
[英]SQL Parser:- get table and column names
问题描述
我正在使用SQL解析器来解析SQL查询并获取表和字段的名称。
我从sqlparser.com下载了演示项目，但编译失败。 在项目中也有对库的引用。
该演示的来源是：-
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using gudusoft.gsqlparser;
using gudusoft.gsqlparser.Units;
namespace getTableColumn
{
class getTableColumn
{
static List<string> tablelist, columnlist, databaselist, schemalist, functionlist, triggerlist, sequencelist;
static StringBuilder tcList;
static Boolean showStructure = false, showList = true, showLocation = false, showEffect = false;
/**
* This is a sample callback function used by SQL parser to determine
* relationship between table and column like this SQL:
* *
* SELECT
* Quantity,b.Time,c.Description
* FROM
* (SELECT ID,Time FROM bTab) b
* INNER JOIN aTab a on a.ID=b.ID
* INNER JOIN cTab c on a.ID=c.ID
*
* column: Quantity will be linked to table: cTab with the help of this
* callback function.
* otherwise, column: Quantity will be linked to table: aTab by default
*
*/
private static bool metadataTableColumn(Object sender, string pServer, string pDatabase, string pSchema, string pTable, string pColumn)
{
string[,] columns = new string[3, 5] {
{ "s1", "d1","dbo", "t1", "c1" },
{ "s2", "d2","dbo", "t2", "c2" },
{ "s3", "d3","dbo", "t3", "c3" } };
bool bServer = false, bDatabase = false, bSchema = false, bTable = false, bColumn = false;
for (int i = 0; i < 3; i++)
{
if (pServer == "") bServer = true;
else bServer = pServer.Equals(columns[i, 0], StringComparison.OrdinalIgnoreCase);
if (!bServer) continue;
if (pDatabase == "") bDatabase = true;
else bDatabase = pDatabase.Equals(columns[i, 1], StringComparison.OrdinalIgnoreCase);
if (!bDatabase) continue;
if (pSchema == "") bSchema = true;
else bSchema = pSchema.Equals(columns[i, 2], StringComparison.OrdinalIgnoreCase);
if (!bSchema) continue;
bTable = pTable.Equals(columns[i, 3], StringComparison.OrdinalIgnoreCase);
if (!bTable) continue;
bColumn = pColumn.Equals(columns[i, 4], StringComparison.OrdinalIgnoreCase);
if (!bColumn) continue;
break;
}
return bColumn;
}
static void sortAndRemoveDup(List<string> pList)
{
pList.Sort();
Int32 index = 0;
while (index < pList.Count - 1)
{
if (pList[index] == pList[index + 1])
pList.RemoveAt(index);
else
index++;
}
}
static void Main(string[] args)
{
string filename = "", dbvendor = "";
if (args.Length == 0)
{
Console.WriteLine("Usage: {0} scriptfile [/d dbvendor] [/v]", Environment.GetCommandLineArgs()[0]);
Console.WriteLine("\t/d \t\t set database vendor");
Console.WriteLine("\tdbvendor \t oracle, mssql, mysql or db2");
Console.WriteLine("\t/v \t\t show detailed information");
return;
}
Array array = Array.CreateInstance(typeof(string), args.Length);
for (int i = 0; i < array.Length; i++)
{
array.SetValue(args[i], i);
}
showLocation = Array.IndexOf(array, "/v") != -1;
showEffect = Array.IndexOf(array, "/v") != -1;
showStructure = Array.IndexOf(array, "/v") != -1;
filename = args[0];
int index = Array.IndexOf(array, "/d");
if (index != -1 && args.Length > index + 1)
{
dbvendor = args[index + 1];
}
TDbVendor db = TDbVendor.DbVOracle;
if (dbvendor.Equals("mssql"))
{
db = TDbVendor.DbVMssql;
}
else if (dbvendor.Equals("db2"))
{
db = TDbVendor.DbVDB2;
}
else if (dbvendor.Equals("mysql"))
{
db = TDbVendor.DbVMysql;
}
//if (args.Length == 2)
//{
// bSortColumn = args[1].Equals("-s", StringComparison.OrdinalIgnoreCase);
//}
TGSqlParser sqlparser = new TGSqlParser(db);
sqlparser.Sqlfilename = filename;
// please use your own function to check table column relation using meta
// information from database
// sqlparser.OnMetaDatabaseTableColumn += metadataTableColumn;
int ret = sqlparser.Parse();
if (ret != 0)
{
Console.WriteLine(sqlparser.ErrorMessages);
return;
}
tablelist = new List<string>();
columnlist = new List<string>();
databaselist = new List<string>();
schemalist = new List<string>();
functionlist = new List<string>();
triggerlist = new List<string>();
sequencelist = new List<string>();
tcList = new StringBuilder();
for (int i = 0; i < sqlparser.SqlStatements.Count(); i++)
{
TCustomSqlStatement sql = sqlparser.SqlStatements[i];
analyzeStmt(sql, 0);
}
if (showStructure)
{
Console.WriteLine(tcList.ToString());
}
showList = true;
if (showList)
{
sortAndRemoveDup(tablelist);
sortAndRemoveDup(columnlist);
sortAndRemoveDup(databaselist);
sortAndRemoveDup(schemalist);
sortAndRemoveDup(functionlist);
sortAndRemoveDup(triggerlist);
sortAndRemoveDup(sequencelist);
Console.WriteLine("Tables:");
Console.WriteLine(new StringBuilder(string.Join("\r\n", tablelist.ToArray())).ToString());
Console.WriteLine("Fields:");
Console.WriteLine(new StringBuilder(string.Join("\r\n", columnlist.ToArray())).ToString());
if (databaselist.Count > 0)
{
Console.WriteLine("database:");
Console.WriteLine(new StringBuilder(string.Join("\r\n", databaselist.ToArray())).ToString());
}
if (schemalist.Count > 0)
{
Console.WriteLine("schema:");
Console.WriteLine(new StringBuilder(string.Join("\r\n", schemalist.ToArray())).ToString());
}
if (functionlist.Count > 0)
{
Console.WriteLine("Functions:");
Console.WriteLine(new StringBuilder(string.Join("\r\n", functionlist.ToArray())).ToString());
}
if (triggerlist.Count > 0)
{
Console.WriteLine("Triggers:");
Console.WriteLine(new StringBuilder(string.Join("\r\n", triggerlist.ToArray())).ToString());
}
if (sequencelist.Count > 0)
{
Console.WriteLine("Sequences:");
Console.WriteLine(new StringBuilder(string.Join("\r\n", sequencelist.ToArray())).ToString());
}
}
//Console.Read();
}
static void analyzeStmt(TCustomSqlStatement stmt, int pNest)
{
tcList.AppendLine("");
tcList.AppendLine(string.Format("{0}{1}", " ".PadLeft(pNest, ' '), stmt.SqlStatementType));
string tn = "", tneffect = "";
for (int k = 0; k < stmt.Tables.Count(); k++)
{
if (stmt.Tables[k].TableType == TLzTableType.lttSubquery)
{
tn = "(subquery, alias:" + stmt.Tables[k].TableAlias + ")";
}
else
{
tn = stmt.Tables[k].TableFullname;
if (stmt.Tables[k].isLinkTable)
{
tn = tn + "(" + stmt.Tables[k].linkedTable.TableFullname + ")";
}
else if (stmt.Tables[k].isCTE)
{
tn = tn + "(CTE)";
}
}
if (!((stmt.Tables[k].TableType == TLzTableType.lttSubquery) || (stmt.Tables[k].isCTE)))
{
tablelist.Add(tn);
}
if (showEffect)
{
tneffect = string.Format("{0}({1})", tn, stmt.Tables[k].effectType);
}
else
{
tneffect = string.Format("{0}", tn);
}
tcList.AppendLine(string.Format("{0}{1}", " ".PadLeft(pNest + 1, ' '), tneffect));
for (int m = 0; m < stmt.Tables[k].linkedColumns.Count(); m++)
{
String columnInfo = "";
if (showLocation)
{
columnInfo = string.Format("{0}({1})", stmt.Tables[k].linkedColumns[m].fieldAttrName, stmt.Tables[k].linkedColumns[m].Location);
}
else
{
columnInfo = string.Format("{0}", stmt.Tables[k].linkedColumns[m].fieldAttrName);
}
tcList.AppendLine(string.Format("{0}{1}", " ".PadLeft(pNest + 2, ' '), columnInfo));
if (!((stmt.Tables[k].TableType == TLzTableType.lttSubquery) || (stmt.Tables[k].isCTE)))
{
if (stmt.Tables[k].isLinkTable)
{ //mssql, deleted, inserted table
columnlist.Add(stmt.Tables[k].linkedTable.TableFullname + '.' + stmt.Tables[k].linkedColumns[m].fieldAttrName);
}
else
columnlist.Add(tn + '.' + stmt.Tables[k].linkedColumns[m].fieldAttrName);
}
}
}
if (stmt.orphanColumns.Count() > 0)
{
tcList.AppendLine(string.Format("{0}{1}", " ".PadLeft(pNest + 1, ' '), " orphan columns:"));
for (int k = 0; k < stmt.orphanColumns.Count(); k++)
{
tcList.AppendLine(string.Format("{0}{1}", " ".PadLeft(pNest + 2, ' '), stmt.orphanColumns[k].AsText));
columnlist.Add("missing." + stmt.orphanColumns[k].AsText);
}
}
if (stmt.DatabaseTokens.Count() > 0)
{
for (int k = 0; k < stmt.DatabaseTokens.Count(); k++)
{
databaselist.Add(stmt.DatabaseTokens[k].AsText);
}
}
if (stmt.SchemaTokens.Count() > 0)
{
for (int k = 0; k < stmt.SchemaTokens.Count(); k++)
{
schemalist.Add(stmt.SchemaTokens[k].AsText);
}
}
if (stmt.FunctionTokens.Count() > 0)
{
for (int k = 0; k < stmt.FunctionTokens.Count(); k++)
{
if (stmt.FunctionTokens[k].ParentToken != null)
{
functionlist.Add(stmt.FunctionTokens[k].ParentToken.AsText + "." + stmt.FunctionTokens[k].AsText);
}
else
{
functionlist.Add(stmt.FunctionTokens[k].AsText);
}
}
}
if (stmt.TriggerTokens.Count() > 0)
{
for (int k = 0; k < stmt.TriggerTokens.Count(); k++)
{
if (stmt.TriggerTokens[k].ParentToken != null)
{
triggerlist.Add(stmt.TriggerTokens[k].ParentToken.AsText + "." + stmt.TriggerTokens[k].AsText);
}
else
{
triggerlist.Add(stmt.TriggerTokens[k].AsText);
}
}
}
if (stmt.SequenceTokens.Count() > 0)
{
for (int k = 0; k < stmt.SequenceTokens.Count(); k++)
{
sequencelist.Add(stmt.SequenceTokens[k].AsText);
}
}
for (int j = 0; j < stmt.ChildNodes.Count(); j++)
{
if (stmt.ChildNodes[j] is TCustomSqlStatement)
{
analyzeStmt(stmt.ChildNodes[j] as TCustomSqlStatement, pNest + 1);
}
}
}
static string getTokenLocation(TSourceToken st)
{
if ((st.Location == TLzOwnerLocation.elfieldbyattr)
|| (st.Location == TLzOwnerLocation.elfieldbyexpr)
)
{
return "columnResult/select list";
}
else if (st.Location == TLzOwnerLocation.elWhere)
{
return "where clause";
}
else if (st.Location == TLzOwnerLocation.elHaving)
{
return "having clause";
}
else if (st.Location == TLzOwnerLocation.elgroupby)
{
return "group by clause";
}
else if (st.Location == TLzOwnerLocation.elorderby)
{
return "order by clause";
}
else if (st.Location == TLzOwnerLocation.eltableFuncArg)
{
return "from clause";
}
else if (st.Location == TLzOwnerLocation.eljoinCondition)
{
return "join condition";
}
else
{
return st.Location.ToString();
}
}
}
}
错误堆栈如下：
Error 91 'gudusoft.gsqlparser.TCustomSqlStatement' does not contain a definition for 'orphanColumns' and no extension method 'orphanColumns' accepting a first argument of type 'gudusoft.gsqlparser.TCustomSqlStatement' could be found (are you missing a using directive or an assembly reference?) C:\Users\User\Downloads\gsqlparser_dotnet_trial_2_6_4 (3)\democollections\getTableColumn\getTableColumn.cs 292 22 getTableColumn
Error 92 'gudusoft.gsqlparser.TCustomSqlStatement' does not contain a definition for 'orphanColumns' and no extension method 'orphanColumns' accepting a first argument of type 'gudusoft.gsqlparser.TCustomSqlStatement' could be found (are you missing a using directive or an assembly reference?) C:\Users\User\Downloads\gsqlparser_dotnet_trial_2_6_4 (3)\democollections\getTableColumn\getTableColumn.cs 295 42 getTableColumn
Error 93 'gudusoft.gsqlparser.TCustomSqlStatement' does not contain a definition for 'orphanColumns' and no extension method 'orphanColumns' accepting a first argument of type 'gudusoft.gsqlparser.TCustomSqlStatement' could be found (are you missing a using directive or an assembly reference?) C:\Users\User\Downloads\gsqlparser_dotnet_trial_2_6_4 (3)\democollections\getTableColumn\getTableColumn.cs 297 97 getTableColumn
Error 94 'gudusoft.gsqlparser.TCustomSqlStatement' does not contain a definition for 'orphanColumns' and no extension method 'orphanColumns' accepting a first argument of type 'gudusoft.gsqlparser.TCustomSqlStatement' could be found (are you missing a using directive or an assembly reference?) C:\Users\User\Downloads\gsqlparser_dotnet_trial_2_6_4 (3)\democollections\getTableColumn\getTableColumn.cs 298 52 getTableColumn
Error 76 'gudusoft.gsqlparser.TGSqlParser' does not contain a definition for 'OnMetaDatabaseTableColumn' and no extension method 'OnMetaDatabaseTableColumn' accepting a first argument of type 'gudusoft.gsqlparser.TGSqlParser' could be found (are you missing a using directive or an assembly reference?) C:\Users\User\Downloads\gsqlparser_dotnet_trial_2_6_4 (3)\democollections\getTableColumn\getTableColumn.cs 149 23 getTableColumn
Error 95 'gudusoft.gsqlparser.TLzOwnerLocation' does not contain a definition for 'eljoinCondition' C:\Users\User\Downloads\gsqlparser_dotnet_trial_2_6_4 (3)\democollections\getTableColumn\getTableColumn.cs 391 54 getTableColumn
Error 81 'gudusoft.gsqlparser.TLzTable' does not contain a definition for 'effectType' and no extension method 'effectType' accepting a first argument of type 'gudusoft.gsqlparser.TLzTable' could be found (are you missing a using directive or an assembly reference?) C:\Users\User\Downloads\gsqlparser_dotnet_trial_2_6_4 (3)\democollections\getTableColumn\getTableColumn.cs 259 77 getTableColumn
Error 79 'gudusoft.gsqlparser.TLzTable' does not contain a definition for 'isCTE' and no extension method 'isCTE' accepting a first argument of type 'gudusoft.gsqlparser.TLzTable' could be found (are you missing a using directive or an assembly reference?) C:\Users\User\Downloads\gsqlparser_dotnet_trial_2_6_4 (3)\democollections\getTableColumn\getTableColumn.cs 246 46 getTableColumn
Error 80 'gudusoft.gsqlparser.TLzTable' does not contain a definition for 'isCTE' and no extension method 'isCTE' accepting a first argument of type 'gudusoft.gsqlparser.TLzTable' could be found (are you missing a using directive or an assembly reference?) C:\Users\User\Downloads\gsqlparser_dotnet_trial_2_6_4 (3)\democollections\getTableColumn\getTableColumn.cs 252 97 getTableColumn
Error 86 'gudusoft.gsqlparser.TLzTable' does not contain a definition for 'isCTE' and no extension method 'isCTE' accepting a first argument of type 'gudusoft.gsqlparser.TLzTable' could be found (are you missing a using directive or an assembly reference?) C:\Users\User\Downloads\gsqlparser_dotnet_trial_2_6_4 (3)\democollections\getTableColumn\getTableColumn.cs 281 101 getTableColumn
Error 77 'gudusoft.gsqlparser.TLzTable' does not contain a definition for 'isLinkTable' and no extension method 'isLinkTable' accepting a first argument of type 'gudusoft.gsqlparser.TLzTable' could be found (are you missing a using directive or an assembly reference?) C:\Users\User\Downloads\gsqlparser_dotnet_trial_2_6_4 (3)\democollections\getTableColumn\getTableColumn.cs 243 40 getTableColumn
Error 87 'gudusoft.gsqlparser.TLzTable' does not contain a definition for 'isLinkTable' and no extension method 'isLinkTable' accepting a first argument of type 'gudusoft.gsqlparser.TLzTable' could be found (are you missing a using directive or an assembly reference?) C:\Users\User\Downloads\gsqlparser_dotnet_trial_2_6_4 (3)\democollections\getTableColumn\getTableColumn.cs 283 43 getTableColumn
Error 82 'gudusoft.gsqlparser.TLzTable' does not contain a definition for 'linkedColumns' and no extension method 'linkedColumns' accepting a first argument of type 'gudusoft.gsqlparser.TLzTable' could be found (are you missing a using directive or an assembly reference?) C:\Users\User\Downloads\gsqlparser_dotnet_trial_2_6_4 (3)\democollections\getTableColumn\getTableColumn.cs 268 52 getTableColumn
Error 83 'gudusoft.gsqlparser.TLzTable' does not contain a definition for 'linkedColumns' and no extension method 'linkedColumns' accepting a first argument of type 'gudusoft.gsqlparser.TLzTable' could be found (are you missing a using directive or an assembly reference?) C:\Users\User\Downloads\gsqlparser_dotnet_trial_2_6_4 (3)\democollections\getTableColumn\getTableColumn.cs 273 79 getTableColumn
Error 84 'gudusoft.gsqlparser.TLzTable' does not contain a definition for 'linkedColumns' and no extension method 'linkedColumns' accepting a first argument of type 'gudusoft.gsqlparser.TLzTable' could be found (are you missing a using directive or an assembly reference?) C:\Users\User\Downloads\gsqlparser_dotnet_trial_2_6_4 (3)\democollections\getTableColumn\getTableColumn.cs 273 126 getTableColumn
Error 85 'gudusoft.gsqlparser.TLzTable' does not contain a definition for 'linkedColumns' and no extension method 'linkedColumns' accepting a first argument of type 'gudusoft.gsqlparser.TLzTable' could be found (are you missing a using directive or an assembly reference?) C:\Users\User\Downloads\gsqlparser_dotnet_trial_2_6_4 (3)\democollections\getTableColumn\getTableColumn.cs 277 74 getTableColumn
Error 89 'gudusoft.gsqlparser.TLzTable' does not contain a definition for 'linkedColumns' and no extension method 'linkedColumns' accepting a first argument of type 'gudusoft.gsqlparser.TLzTable' could be found (are you missing a using directive or an assembly reference?) C:\Users\User\Downloads\gsqlparser_dotnet_trial_2_6_4 (3)\democollections\getTableColumn\getTableColumn.cs 284 107 getTableColumn
Error 90 'gudusoft.gsqlparser.TLzTable' does not contain a definition for 'linkedColumns' and no extension method 'linkedColumns' accepting a first argument of type 'gudusoft.gsqlparser.TLzTable' could be found (are you missing a using directive or an assembly reference?) C:\Users\User\Downloads\gsqlparser_dotnet_trial_2_6_4 (3)\democollections\getTableColumn\getTableColumn.cs 287 67 getTableColumn
Error 78 'gudusoft.gsqlparser.TLzTable' does not contain a definition for 'linkedTable' and no extension method 'linkedTable' accepting a first argument of type 'gudusoft.gsqlparser.TLzTable' could be found (are you missing a using directive or an assembly reference?) C:\Users\User\Downloads\gsqlparser_dotnet_trial_2_6_4 (3)\democollections\getTableColumn\getTableColumn.cs 245 54 getTableColumn
Error 88 'gudusoft.gsqlparser.TLzTable' does not contain a definition for 'linkedTable' and no extension method 'linkedTable' accepting a first argument of type 'gudusoft.gsqlparser.TLzTable' could be found (are you missing a using directive or an assembly reference?) C:\Users\User\Downloads\gsqlparser_dotnet_trial_2_6_4 (3)\democollections\getTableColumn\getTableColumn.cs 284 58 getTableColumn
1 个解决方案
解决方案1
1 已采纳 2015-07-21 22:07:10
回答问题。 只需在TokenizeQuery类中调用exec方法。 表名和列名将存储在列表中。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using gudusoft.gsqlparser;
using gudusoft.gsqlparser.Units;
namespace Custom.Data {
class TokenizeQuery {
public static List < String > TableNames = new List < String > ();
public static List < String > ColumnNames = new List < String > ();
// public static String inputSql = "SELECT * FROM ABC";
public void exec(String query) {
TableNames.Clear();
ColumnNames.Clear();
getTableColumn _new = new getTableColumn();
_new.GetTableColumnName(query);
}
public void print() {
Console.WriteLine("**************************************************************");
Console.Write("TABLES\n\n");
TableNames.ForEach(i => Console.Write("{0}\n", i));
Console.Write("COLUMNS\n\n");
ColumnNames.ForEach(i => Console.Write("{0}\n", i));
Console.WriteLine("**************************************************************");
}
#
region tableInfo
class tableInfo {
public TCustomSqlStatement stmt;
public TSourceToken database, schema, table, tableAlias;
public string getDatabaseName() {
if (database == null) {
return "";
} else {
return database.AsText;
}
}
public string getSchemaName() {
if (schema == null) {
return "";
} else {
return schema.AsText;
}
}
public string getTableName() {
if (table == null) {
return "";
} else {
return table.AsText;
}
}
public string getTableAliasName() {
if (tableAlias == null) {
return "";
} else {
return tableAlias.AsText;
}
}
public tableInfo(TCustomSqlStatement s) {
stmt = s;
}
}
#
endregion
# region columnInfo
class columnInfo {
public tableInfo table;
public TSourceToken column;
public string columnAlias;
//public int lineNo, columnNo;
public TLzOwnerLocation location;
public TLzExpression columnExpr;
public columnInfo(tableInfo t) {
table = new tableInfo(t.stmt);
table.database = t.database;
table.schema = t.schema;
table.table = t.table;
table.tableAlias = t.tableAlias;
}
}
#
endregion
class getTableColumn {
static List < columnInfo > columnInfos = null;
static bool bSortColumn = false;
/**
* This is a sample callback function used by SQL parser to determine
* relationship between table and column like this SQL:
* *
* SELECT
* Quantity,b.Time,c.Description
* FROM
* (SELECT ID,Time FROM bTab) b
* INNER JOIN aTab a on a.ID=b.ID
* INNER JOIN cTab c on a.ID=c.ID
*
* column: Quantity will be linked to table: cTab with the help of this
* callback function.
* otherwise, column: Quantity will be linked to table: aTab by default
*
*/
private static bool metadataTableColumn(Object sender, string pSchema, string pTable, string pColumn) {
string[, ] columns = new string[3, 3] {
{
"dbo", "subselect2table1", "s2t1a1"
}, {
"dbo", "subselect3table1", "Quantity2"
}, {
"dbo", "subselect3table2", "s3t1a1"
}
};
bool bSchema = false, bTable = false, bColumn = false;
for (int i = 0; i < 3; i++) {
if (pSchema == "") bSchema = true;
else bSchema = pSchema.Equals(columns[i, 0], StringComparison.OrdinalIgnoreCase);
if (!bSchema) continue;
bTable = pTable.Equals(columns[i, 1], StringComparison.OrdinalIgnoreCase);
if (!bTable) continue;
bColumn = pColumn.Equals(columns[i, 2], StringComparison.OrdinalIgnoreCase);
if (!bColumn) continue;
break;
}
return bColumn;
}
public void GetTableColumnName(String inputSql) {
columnInfos = new List < columnInfo > ();
TGSqlParser sqlparser = new TGSqlParser(TDbVendor.DbVOracle); //DbVMssql
sqlparser.SqlText.Text = inputSql;
// please use your own function to check table column relation using meta
// information from database
//sqlparser.OnMetaDatabaseTableColumn += metadataTableColumn;
int ret = sqlparser.Parse();
if (ret != 0) {
Console.WriteLine(sqlparser.ErrorMessages);
return;
}
for (int i = 0; i < sqlparser.SqlStatements.Count(); i++) {
TCustomSqlStatement sql = sqlparser.SqlStatements[i];
printTableTokensInStmt(sql, 0);
for (int j = 0; j < sql.ChildNodes.Count(); j++) {
if (sql.ChildNodes[j] is TCustomSqlStatement) {
tablesInStmt(sql.ChildNodes[j] as TCustomSqlStatement, 0);
}
}
}
if (bSortColumn) {
//Console.WriteLine(System.Environment.NewLine + "print columns in the same order they appear in sql statement");
columnInfos.Sort(delegate(columnInfo a, columnInfo b) {
int xdiff = a.column.XPosition - b.column.XPosition;
if (xdiff != 0) return xdiff;
return a.column.YPosition - b.column.YPosition;
});
printColumnInfos();
}
}
static void printColumnInfos() {
int columnOrder = 1;
//Console.WriteLine("{0,-15}{1,-25}{2,-25}{3,-15}\n{4,-20}{5,-20}{6,-40}", "pos", "column", "table", "t-alias", "schema", "DB","Loc");
Console.WriteLine("{0},{1},{2},{3},{4},{5},{6},{7}", "columnOrder", "location", "ColumnName", "TableName", "TableAlias", "Schema", "DatabaseName", "Notes");
foreach(columnInfo c in columnInfos) {
TSourceToken st = c.column;
String notes = "";
if (st.Location == TLzOwnerLocation.elWhere) {
notes = whereclause(c.table.stmt, st);
} else if (st.Location == TLzOwnerLocation.elHaving) {
notes = havingclause((TSelectSqlStatement) c.table.stmt, st);
} else if (st.Location == TLzOwnerLocation.eljoinitemcondition) {
notes = joincondition((TSelectSqlStatement) c.table.stmt, st);
}
// Console.WriteLine("{0},{1},{2},{3},{4},{5},{6},{7}", String.Format("[{0,3},{1,3}]", c.column.XPosition, c.column.YPosition), c.column.AsText, c.table.getTableName(), c.table.getTableAliasName(), c.table.getSchemaName(), c.table.getDatabaseName(), getTokenLocation(c.column).Trim());
Console.WriteLine("{0},{1},{2},{3},{4},{5},{6},{7}", columnOrder, getTokenLocation(c.column), c.column.AsText, c.table.getTableName(), c.table.getTableAliasName(), c.table.getSchemaName(), c.table.getDatabaseName(), notes);
columnOrder++;
}
}
static void tablesInStmt(TCustomSqlStatement stmt, int level) {
printTableTokensInStmt(stmt, level);
for (int j = 0; j < stmt.ChildNodes.Count(); j++) {
if (stmt.ChildNodes[j] is TCustomSqlStatement) {
tablesInStmt(stmt.ChildNodes[j] as TCustomSqlStatement, level + 1);
}
}
}
static void printTableTokensInStmt(TCustomSqlStatement stmt, int level) {
tableInfo tableInfo = new tableInfo(stmt);
TSourceTokenList tokenList = stmt.TableTokens;
if (!bSortColumn) {
String typeinfo = stmt.SqlStatementType.ToString();
if (stmt is TLzPlsql_Package) {
TLzPlsql_Package package = (TLzPlsql_Package) stmt;
typeinfo += '(' + package._package_name.AsText + ')';
} else if (stmt is TLzPlsql_SubProgram) {
TLzPlsql_SubProgram procedure = (TLzPlsql_SubProgram) stmt;
typeinfo += '(' + procedure._procedure_name.AsText + ')';
} else if (stmt is TLzPlsql_Trigger) {
TLzPlsql_Trigger trigger = (TLzPlsql_Trigger) stmt;
typeinfo += '(' + trigger._ndTriggername.AsText + ')';
}
Console.WriteLine(new String(' ', level) + "tables in {0}: {1} adfafsasfa", typeinfo, tokenList.Count());
}
TSourceToken st = null;
string tablestr = null;
string tablealias = null;
for (int i = 0; i < tokenList.Count(); i++) {
st = tokenList[i];
tableInfo.table = st;
tablestr = st.AsText;
if (st.RelatedToken != null) {
tablealias = "alias: " + st.RelatedToken.AsText;
tableInfo.tableAlias = st.RelatedToken;
}
if (st.ParentToken != null) {
//schema
tablestr = st.ParentToken.AsText + "." + tablestr;
tableInfo.schema = st.ParentToken;
if (st.ParentToken.ParentToken != null) {
//database
tablestr = st.ParentToken.ParentToken.AsText + "." + tablestr;
tableInfo.database = st.ParentToken.ParentToken;
}
}
if (!bSortColumn) {
TableNames.Add(tablestr);
Console.WriteLine(new String(' ', level + 1) + "TABLE NAME" + tablestr + getTokenPosition(st) + " " + tablealias);
}
printColumnsInTableToken(stmt, st, level + 2, tableInfo);
}
}
static void printColumnsInTableToken(TCustomSqlStatement stmt, TSourceToken st, int level, tableInfo tableInfo) {
if (st.RelatedToken != null) {
// declared table alias token
TSourceToken rt = st.RelatedToken;
TSourceToken rrt = null;
for (int i = 0; i < rt.RelatedTokens.Count(); i++) {
rrt = rt.RelatedTokens[i];
if (rrt.ChildToken != null) {
columnInfo columnInfo = new columnInfo(tableInfo);
columnInfo.column = rrt.ChildToken;
columnInfos.Add(columnInfo);
if (!bSortColumn) {
ColumnNames.Add(rrt.ChildToken.AsText);
Console.WriteLine(new String(' ', level + 1) + "IDHAR HU" + rrt.ChildToken.AsText + getTokenPosition(rrt.ChildToken) + "," + getTokenLocation(rrt.ChildToken));
}
}
}
}
TSourceToken rtt = null;
for (int i = 0; i < st.RelatedTokens.Count(); i++) {
// reference table token
rtt = st.RelatedTokens[i];
if (rtt.DBObjType == TDBObjType.ttObjField) {
// get all field tokens link with table token (those token not linked by syntax like tablename.fieldname)
// but like this : select f from t
columnInfo columnInfo = new columnInfo(tableInfo);
columnInfo.column = rtt;
columnInfos.Add(columnInfo);
if (!bSortColumn)
Console.WriteLine(new String(' ', level + 1) + rtt.AsText + getTokenPosition(rtt) + getColumnTokenIsDetermined(rtt) + "," + getTokenLocation(rtt));
}
if (rtt.ChildToken != null) {
columnInfo columnInfo = new columnInfo(tableInfo);
columnInfo.column = rtt.ChildToken;
columnInfos.Add(columnInfo);
if (!bSortColumn)
Console.WriteLine(new String(' ', level + 1) + rtt.ChildToken.AsText + getTokenPosition(rtt.ChildToken) + getColumnTokenIsDetermined(rtt.ChildToken) + "," + getTokenLocation(rtt.ChildToken));
}
}
}
static string getColumnTokenIsDetermined(TSourceToken st) {
if ((st.DBObjType == TDBObjType.ttObjField)) {
return " <guessed> ";
} else {
return "";
}
}
static string getTokenPosition(TSourceToken st) {
return "(" + st.XPosition + "," + st.YPosition + ")";
}
static string getTokenLocation(TSourceToken st) {
if ((st.Location == TLzOwnerLocation.elfieldbyattr) || (st.Location == TLzOwnerLocation.elfieldbyexpr)) {
return "columnResult/select list";
} else if (st.Location == TLzOwnerLocation.elWhere) {
return "where clause";
} else if (st.Location == TLzOwnerLocation.elHaving) {
return "having clause";
} else if (st.Location == TLzOwnerLocation.elgroupby) {
return "group by clause";
} else if (st.Location == TLzOwnerLocation.elorderby) {
return "order by clause";
} else if (st.Location == TLzOwnerLocation.eltableFuncArg) {
return "from clause";
} else if (st.Location == TLzOwnerLocation.eljoinitemcondition) {
return "join condition";
} else {
return st.Location.ToString();
}
}
static string whereclause(TCustomSqlStatement stmt, TSourceToken st) {
string ret = "";
if (stmt.WhereClause == null) {
return ret;
}
ret = stmt.WhereClause.AsText;
return ret;
}
static string havingclause(TSelectSqlStatement stmt, TSourceToken st) {
string ret = "";
if (stmt.HavingClause == null) {
return ret;
}
ret = stmt.HavingClause.AsText;
return ret;
}
static string joincondition(TSelectSqlStatement stmt, TSourceToken st) {
string ret = "";
if (stmt.JoinTables.Count() == 0) {
return ret;
}
TLzJoin join = stmt.JoinTables[0];
if (join.JoinItems.Count() == 0) {
return ret;
}
foreach(TLzJoinItem joinitem in join.JoinItems) {
for (int k = joinitem.JoinQual.StartToken.posinlist; k <= joinitem.JoinQual.EndToken.posinlist; k++) {
if (st.posinlist == k) {
ret = joinitem.JoinQual.AsText;
break;
}
}
}
return ret;
}
}
}
}
如何从现有的SQL Server快照/备份文件中获取表名和列名
[英]How to get table and column names from existing sql server snapshot/backup file
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