void ParseContent(TokenStream tkstream, ref TablePart table, ref FieldPart field, ref KeyPart key)
{
//get fields over here
Token iden = tkstream.CurrentToken;
switch (tkstream.CurrentToken.OriginalText)
{
case ",":
{
switch (table.PrimaryKey)
{
case null:
{
table.FieldList.Add(field);
field = new FieldPart();
}
break;
default:
{
if (key.IndexKind != null)
{
table.KeyList.Add(key);
key = new KeyPart();
}
}
break;
}
}
break;
default:
{
switch (iden.TokenName)
{
case MySqlTokenName.Iden:
{
string[] fieldName = iden.OriginalText.Split(new char[] { '`' }, StringSplitOptions.RemoveEmptyEntries);
field.FieldName = fieldName[0];
}
break;
case MySqlTokenName.FieldTypeWithParen:
{
CompoundToken ctk = (CompoundToken)iden;
field.Type = ctk.TypeName;
field.Length = ctk.Content;
}
break;
case MySqlTokenName.FieldType:
{
field.Type = iden.OriginalText;
}
break;
case MySqlTokenName.Unsigned:
{
field.HasUnsign = true;
}
break;
case MySqlTokenName.CharacterSet:
{
tkstream.ReadNext();
tkstream.ReadNext();
Token idenNext = tkstream.CurrentToken;
if (idenNext.TokenName == MySqlTokenName.Unknown)
{
field.CharacterSet = idenNext.OriginalText;
}
}
break;
case MySqlTokenName.Not:
{
tkstream.ReadNext();
Token idenNext = tkstream.CurrentToken;
field.Not = idenNext.OriginalText;
}
break;
case MySqlTokenName.Default:
{
tkstream.ReadNext();
Token idenNext = tkstream.CurrentToken;
string[] dfValue = idenNext.OriginalText.Split(new string[] { "'" }, StringSplitOptions.RemoveEmptyEntries);
if (dfValue.Length > 0)
{
field.FieldDefault = dfValue[0];
}
else
{
field.FieldDefault = "";
}
}
break;
case MySqlTokenName.Unknown:
{
field.Other = iden.OriginalText;
}
break;
case MySqlTokenName.PrimaryKey:
{
tkstream.ReadNext();
key.IndexKind = "PRIMARY";
}
goto case MySqlTokenName.IndexKey;
case MySqlTokenName.UniqueKey:
{
tkstream.ReadNext();
key.IndexKind = "UNIQUE";
}
goto case MySqlTokenName.IndexKey;
case MySqlTokenName.FulltextKey:
{
tkstream.ReadNext();
key.IndexKind = "FULLTEXT";
}
goto case MySqlTokenName.IndexKey;
case MySqlTokenName.IndexKey:
{
tkstream.ReadNext();
if (key.IndexKind == null)
{
key.IndexKind = "INDEX";
}
if (key.IndexKind == "PRIMARY")
{
string[] pkName = tkstream.CurrentToken.OriginalText.Split(new char[] { '`', '(', ')' }, StringSplitOptions.RemoveEmptyEntries);
table.PrimaryKey = pkName[0];
}
Token idenNext = tkstream.CurrentToken;
string[] ndName = idenNext.OriginalText.Split(new char[] { '`', '(', ')' }, StringSplitOptions.RemoveEmptyEntries);
key.IndexName = ndName[0];
key.IndexColumns = new List <string>();
if (key.IndexKind != "PRIMARY")
{
tkstream.ReadNext();
}
if (tkstream.CurrentToken.OriginalText.StartsWith("("))
{
string[] temp = tkstream.CurrentToken.OriginalText.Split('(');
string pos = temp[1];
while (!pos.EndsWith(")"))
{
string[] keyName = pos.Split(new char[] { '`' }, StringSplitOptions.RemoveEmptyEntries);
key.IndexColumns.Add(keyName[0]);
tkstream.ReadNext();
pos = tkstream.CurrentToken.OriginalText;
}
if (pos.EndsWith(")"))
{
string[] temp2 = pos.Split(')');
string[] keyName = temp2[0].Split(new char[] { '`' }, StringSplitOptions.RemoveEmptyEntries);
key.IndexColumns.Add(keyName[0]);
break;
}
}
}
break;
case MySqlTokenName.Using:
{
tkstream.ReadNext();
Token idenNext = tkstream.CurrentToken;
table.Using = idenNext.OriginalText;
}
break;
case MySqlTokenName.Auto_Increment:
{
field.HasAuto = true;
}
break;
default:
field.Other = iden.OriginalText;
break;
}
}
break;
}
tkstream.ReadNext();
}
public void ParseSql(string createSql)
{
//----------------------
//1. tokenization => tokenizer
//2. parse => parser
//3. semantic checking => semantic checker
//1.1
string[] tokens = createSql.Split(new char[] { ' ', '\n', '\r', '=', ';' }, StringSplitOptions.RemoveEmptyEntries);
TokenNameDict tkDict = new TokenNameDict();
//1.2 primary tokename
List <Token> tokenList = new List <Token>();
foreach (string orgTk in tokens)
{
#if DEBUG
if (orgTk == "`Index_2`")
{
}
#endif
//check iden
if (orgTk.StartsWith("`"))
{
//TODO:
//create iden token here
Token token = new Token(orgTk);
token.TokenName = MySqlTokenName.Iden;
tokenList.Add(token);
continue;
}
if (orgTk.EndsWith(","))
{
string[] temp = orgTk.Split(',');
foreach (string each in temp)
{
if (each != "")
{
Token tokenIden = new Token(each);
tokenIden.TokenName = MySqlTokenName.Iden;
tkDict.AssignTokenName(tokenIden);
tokenList.Add(tokenIden);
}
else
{
Token tokenComma = new Token(",");
tokenComma.TokenName = MySqlTokenName.Comma;
tokenList.Add(tokenComma);
}
}
continue;
}
if (orgTk.StartsWith(")"))
{
Token token = new Token(orgTk);
token.TokenName = MySqlTokenName.ParenClose;
tokenList.Add(token);
continue;
}
//check paren
int openParen_pos = orgTk.IndexOf('(');
if (openParen_pos > -1)
{
if (openParen_pos > 0)
{
int closeParen_pos = orgTk.LastIndexOf(')');
if (closeParen_pos < 0)
{
//TODO: check if this can occur?
throw new MyParserNotSupportException();
}
//-----------------
CompoundToken compToken = new CompoundToken();
compToken.TypeName = orgTk.Substring(0, openParen_pos);
compToken.Content = orgTk.Substring(openParen_pos + 1, closeParen_pos - openParen_pos - 1);
compToken.TokenName = MySqlTokenName.FieldTypeWithParen;
//tkDict.AssignTokenName(compToken);
tokenList.Add(compToken);
}
else //openParen_pos == 0
{
Token token = new Token(orgTk);
tkDict.AssignTokenName(token);
if (orgTk.EndsWith(")"))
{
token.TokenName = MySqlTokenName.Iden;
}
else
{
token.TokenName = MySqlTokenName.ParenOpen;
}
tokenList.Add(token);
}
continue;
}
else
{
Token token = new Token(orgTk);
tkDict.AssignTokenName(token);
tokenList.Add(token);
}
}
//2.1 ....
//parse
TokenStream tokenstrm = new TokenStream(tokenList);
int count = tokenstrm.Count;
TablePart tableResult;
tableTreeList = new List <TablePart>();
while (!tokenstrm.IsEnd)
{
Token tk = tokenstrm.CurrentToken;
switch (tk.TokenName)
{
case MySqlTokenName.Create:
{
tokenstrm.ReadNext();
Token nextTk = tokenstrm.CurrentToken;
switch (nextTk.TokenName)
{
case MySqlTokenName.Table:
{
TablePart table = new TablePart();
tokenstrm.ReadNext();
tableResult = ParseCreateTable(tokenstrm, table);
tableTreeList.Add(tableResult);
}
break;
}
}
break;
}
tokenstrm.ReadNext();
}
}