|
private ColumnDefinition ( ) : |
||
| return | ||
private DdlColumnDefinition ColumnDefinition()
{
var dataType = DataType();
var notNull = false;
IExpression defaultVal = null;
var autoIncrement = false;
var sindex = SpecialIndex.None;
var format = ColumnFormat.None;
LiteralString comment = null;
if (lexer.Token() == MySqlToken.KwNot)
{
lexer.NextToken();
Match(MySqlToken.LiteralNull);
notNull = true;
}
else
{
if (lexer.Token() == MySqlToken.LiteralNull)
{
lexer.NextToken();
}
}
if (lexer.Token() == MySqlToken.KwDefault)
{
lexer.NextToken();
defaultVal = exprParser.Expression();
if (!(defaultVal is Literal))
{
throw new SqlSyntaxErrorException("default value of column must be a literal: " +
defaultVal);
}
}
if (lexer.Token() == MySqlToken.Identifier && "AUTO_INCREMENT".Equals(lexer.GetStringValueUppercase()))
{
lexer.NextToken();
autoIncrement = true;
}
switch (lexer.Token())
{
case MySqlToken.KwUnique:
{
if (lexer.NextToken() == MySqlToken.KwKey)
{
lexer.NextToken();
}
sindex = SpecialIndex.Unique;
break;
}
case MySqlToken.KwPrimary:
{
lexer.NextToken();
goto case MySqlToken.KwKey;
}
case MySqlToken.KwKey:
{
Match(MySqlToken.KwKey);
sindex = SpecialIndex.Primary;
break;
}
}
if (lexer.Token() == MySqlToken.Identifier && "COMMENT".Equals(lexer.GetStringValueUppercase()))
{
lexer.NextToken();
comment = (LiteralString)exprParser.Expression();
}
if (lexer.Token() == MySqlToken.Identifier && "COLUMN_FORMAT".Equals(lexer.GetStringValueUppercase()))
{
switch (lexer.NextToken())
{
case MySqlToken.KwDefault:
{
lexer.NextToken();
format = ColumnFormat.Default;
break;
}
case MySqlToken.Identifier:
{
var si = specialIdentifiers.GetValue(lexer.GetStringValueUppercase());
if (si != SpecialIdentifier.None)
{
switch (si)
{
case SpecialIdentifier.Fixed:
{
lexer.NextToken();
format = ColumnFormat.Fixed;
break;
}
case SpecialIdentifier.Dynamic:
{
lexer.NextToken();
format = ColumnFormat.Dynamic;
break;
}
}
}
break;
}
}
}
return new DdlColumnDefinition(dataType, notNull,
defaultVal, autoIncrement, sindex, comment, format);
}