/// <summary>first <code>(</code> has been consumed</summary>
/// <exception cref="System.SqlSyntaxErrorException" />
public virtual Ref RefsOrQuery()
{
Ref temp;
Refs rst;
Union u;
switch (lexer.Token())
{
case MySqlToken.KwSelect:
{
u = new Union();
for (;;)
{
var s = SelectPrimary();
u.AddSelect(s);
if (lexer.Token() == MySqlToken.KwUnion)
{
lexer.NextToken();
}
else
{
break;
}
}
if (u.selects.Count == 1)
{
return(u.selects[0]);
}
return(u);
}
case MySqlToken.PuncLeftParen:
{
lexer.NextToken();
temp = RefsOrQuery();
Match(MySqlToken.PuncRightParen);
if (temp is Query)
{
if (temp is Select)
{
if (lexer.Token() == MySqlToken.KwUnion)
{
u = new Union();
u.AddSelect((Select)temp);
while (lexer.Token() == MySqlToken.KwUnion)
{
lexer.NextToken();
temp = SelectPrimary();
u.AddSelect((Select)temp);
}
return(u);
}
}
if (lexer.Token() == MySqlToken.KwAs)
{
lexer.NextToken();
var alias = lexer.GetStringValue();
temp = new SubQuery((Query)temp, alias);
lexer.NextToken();
}
else
{
return(temp);
}
}
// ---- build factor complete---------------
temp = BuildRef(temp);
// ---- build ref complete---------------
break;
}
default:
{
temp = Ref();
break;
}
}
if (lexer.Token() == MySqlToken.PuncComma)
{
rst = new Refs();
rst.AddRef(temp);
for (; lexer.Token() == MySqlToken.PuncComma;)
{
lexer.NextToken();
temp = Ref();
rst.AddRef(temp);
}
return(rst);
}
return(temp);
}
/// <summary>first <code>(</code> has been consumed</summary>
/// <exception cref="System.SqlSyntaxErrorException" />
public virtual Ref RefsOrQuery()
{
Ref temp;
Refs rst;
Union u;
switch (lexer.Token())
{
case MySqlToken.KwSelect:
{
u = new Union();
for (;;)
{
var s = SelectPrimary();
u.AddSelect(s);
if (lexer.Token() == MySqlToken.KwUnion)
{
lexer.NextToken();
}
else
{
break;
}
}
if (u.selects.Count == 1)
{
return u.selects[0];
}
return u;
}
case MySqlToken.PuncLeftParen:
{
lexer.NextToken();
temp = RefsOrQuery();
Match(MySqlToken.PuncRightParen);
if (temp is Query)
{
if (temp is Select)
{
if (lexer.Token() == MySqlToken.KwUnion)
{
u = new Union();
u.AddSelect((Select)temp);
while (lexer.Token() == MySqlToken.KwUnion)
{
lexer.NextToken();
temp = SelectPrimary();
u.AddSelect((Select)temp);
}
return u;
}
}
if (lexer.Token() == MySqlToken.KwAs)
{
lexer.NextToken();
var alias = lexer.GetStringValue();
temp = new SubQuery((Query)temp, alias);
lexer.NextToken();
}
else
{
return temp;
}
}
// ---- build factor complete---------------
temp = BuildRef(temp);
// ---- build ref complete---------------
break;
}
default:
{
temp = Ref();
break;
}
}
if (lexer.Token() == MySqlToken.PuncComma)
{
rst = new Refs();
rst.AddRef(temp);
for (; lexer.Token() == MySqlToken.PuncComma;)
{
lexer.NextToken();
temp = Ref();
rst.AddRef(temp);
}
return rst;
}
return temp;
}