/// <summary>
/// Removes a token using the enhanced token stream class.
/// </summary>
/// <param name="sql"></param>
/// <param name="position"></param>
/// <returns></returns>
private CommonTokenStream RemoveToken(string sql, SnapshotPoint snapPos)
{
MemoryStream ms = new MemoryStream(ASCIIEncoding.ASCII.GetBytes(sql));
CaseInsensitiveInputStream input = new CaseInsensitiveInputStream(ms);
//ANTLRInputStream input = new ANTLRInputStream(ms);
Version ver = LanguageServiceUtil.GetVersion(LanguageServiceUtil.GetConnection().ServerVersion);
MySQLLexer lexer = new MySQLLexer(input);
lexer.MySqlVersion = ver;
TokenStreamRemovable tokens = new TokenStreamRemovable(lexer);
IToken tr = null;
int position = snapPos.Position;
tokens.Fill();
if (!char.IsWhiteSpace(snapPos.GetChar()))
{
foreach (IToken t in tokens.GetTokens())
{
if ((t.StartIndex <= position) && (t.StopIndex >= position))
{
tr = t;
break;
}
}
tokens.Remove(tr);
}
return tokens;
}
public static MySQL51Parser.program_return ParseSql(string sql, bool expectErrors, out StringBuilder sb, Version version )
{
// The grammar supports upper case only
MemoryStream ms = new MemoryStream(ASCIIEncoding.ASCII.GetBytes(sql/*.ToUpper() */));
CaseInsensitiveInputStream input = new CaseInsensitiveInputStream(ms);
//ANTLRInputStream input = new ANTLRInputStream(ms);
MySQLLexer lexer = new MySQLLexer(input);
lexer.MySqlVersion = version;
CommonTokenStream tokens = new CommonTokenStream(lexer);
MySQLParser parser = new MySQLParser(tokens);
parser.MySqlVersion = version;
sb = new StringBuilder();
TextWriter tw = new StringWriter(sb);
parser.TraceDestination = tw;
MySQL51Parser.program_return r = parser.program();
if (!expectErrors)
{
if (0 != parser.NumberOfSyntaxErrors)
Assert.AreEqual("", sb.ToString());
//Assert.AreEqual( 0, parser.NumberOfSyntaxErrors);
}
else
{
Assert.AreNotEqual(0, parser.NumberOfSyntaxErrors);
}
return r;
}
internal static MySQL51Parser.program_return ParseSql(
string sql, bool expectErrors, out StringBuilder sb, out CommonTokenStream tokensOutput)
{
DbConnection con = GetConnection();
// The grammar supports upper case only
MemoryStream ms = new MemoryStream(ASCIIEncoding.ASCII.GetBytes(sql));
CaseInsensitiveInputStream input = new CaseInsensitiveInputStream(ms);
//ANTLRInputStream input = new ANTLRInputStream(ms);
MySQLLexer lexer = new MySQLLexer(input);
lexer.MySqlVersion = GetVersion( con.ServerVersion );
CommonTokenStream tokens = new CommonTokenStream(lexer);
tokensOutput = tokens;
return DoParse(tokens, expectErrors, out sb, lexer.MySqlVersion);
}
public void TestTokenRemove()
{
string sql = "select *, a, c, d from table1 where a is null";
MemoryStream ms = new MemoryStream(ASCIIEncoding.ASCII.GetBytes(sql));
CaseInsensitiveInputStream input = new CaseInsensitiveInputStream(ms);
//ANTLRInputStream input = new ANTLRInputStream(ms);
MySQLLexer lexer = new MySQLLexer(input);
MySql.Parser.TokenStreamRemovable tsr = new MySql.Parser.TokenStreamRemovable(lexer);
tsr.Fill();
List<IToken> tokens = tsr.GetTokens();
IToken removed = null;
foreach( IToken t in tokens )
{
if (t.Text == "d")
{
removed = t;
break;
}
}
tsr.Remove(removed);
tokens = tsr.GetTokens();
}
public static string GetRoutineName(string sql)
{
MySQL51Parser.program_return r = new MySQL51Parser.program_return();
StringBuilder sb;
bool expectErrors = false;
CommonTokenStream cts;
MemoryStream ms = new MemoryStream(ASCIIEncoding.ASCII.GetBytes(sql));
CaseInsensitiveInputStream input = new CaseInsensitiveInputStream(ms);
MySQLLexer lexer = new MySQLLexer(input);
CommonTokenStream tokens = new CommonTokenStream(lexer);
MySQLParser parser = new MySQLParser(tokens);
sb = new StringBuilder();
TextWriter tw = new StringWriter(sb);
parser.TraceDestination = tw;
try
{
r = parser.program();
}
catch (RewriteEmptyStreamException e)
{
sb.AppendLine();
sb.Append(e.Message);
}
cts = tokens;
if (!expectErrors && sb.Length != 0)
{
throw new DebugSyntaxException(sb.ToString());
}
CommonTree t = (CommonTree)r.Tree;
if (t.IsNil)
t = (CommonTree)t.GetChild(0);
return GetRoutineName(t);
}
public MySQL51Parser.program_return ParseSql(string sql, bool expectErrors, out StringBuilder sb, out CommonTokenStream cts)
{
Version ver = ParserUtils.GetVersion( _connection.ServerVersion );
// The grammar supports upper case only
MemoryStream ms = new MemoryStream(ASCIIEncoding.ASCII.GetBytes(sql));
CaseInsensitiveInputStream input = new CaseInsensitiveInputStream(ms);
MySQLLexer lexer = new MySQLLexer(input);
lexer.MySqlVersion = ver;
CommonTokenStream tokens = new CommonTokenStream(lexer);
MySQLParser parser = new MySQLParser(tokens);
parser.MySqlVersion = ver;
sb = new StringBuilder();
TextWriter tw = new StringWriter(sb);
parser.TraceDestination = tw;
MySQL51Parser.program_return r = new MySQL51Parser.program_return();
r.Tree = null;
try
{
r = parser.program();
}
catch (RewriteEmptyStreamException e)
{
sb.AppendLine();
sb.Append(e.Message);
}
cts = tokens;
if (!expectErrors && sb.Length != 0)
{
throw new DebugSyntaxException(sb.ToString());
}
return r;
}
