public TSQLSelectStatement Parse()
{
// (SELECT 1)
int level = 0;
while (Tokenizer.Current.IsCharacter(TSQLCharacters.OpenParentheses))
{
Statement.Tokens.Add(Tokenizer.Current);
level++;
Tokenizer.MoveNext();
TSQLTokenParserHelper.ReadCommentsAndWhitespace(
Tokenizer,
Statement);
}
TSQLSelectClause selectClause = new TSQLSelectClauseParser().Parse(Tokenizer);
Statement.Select = selectClause;
Statement.Tokens.AddRange(selectClause.Tokens);
if (Tokenizer.Current.IsKeyword(TSQLKeywords.INTO))
{
TSQLIntoClause intoClause = new TSQLIntoClauseParser().Parse(Tokenizer);
Statement.Into = intoClause;
Statement.Tokens.AddRange(intoClause.Tokens);
}
if (Tokenizer.Current.IsKeyword(TSQLKeywords.FROM))
{
TSQLFromClause fromClause = new TSQLFromClauseParser().Parse(Tokenizer);
Statement.From = fromClause;
Statement.Tokens.AddRange(fromClause.Tokens);
}
if (Tokenizer.Current.IsKeyword(TSQLKeywords.WHERE))
{
TSQLWhereClause whereClause = new TSQLWhereClauseParser().Parse(Tokenizer);
Statement.Where = whereClause;
Statement.Tokens.AddRange(whereClause.Tokens);
}
if (Tokenizer.Current.IsKeyword(TSQLKeywords.GROUP))
{
TSQLGroupByClause groupByClause = new TSQLGroupByClauseParser().Parse(Tokenizer);
Statement.GroupBy = groupByClause;
Statement.Tokens.AddRange(groupByClause.Tokens);
}
if (Tokenizer.Current.IsKeyword(TSQLKeywords.HAVING))
{
TSQLHavingClause havingClause = new TSQLHavingClauseParser().Parse(Tokenizer);
Statement.Having = havingClause;
Statement.Tokens.AddRange(havingClause.Tokens);
}
while (level > 0 && Tokenizer.Current.IsCharacter(TSQLCharacters.CloseParentheses))
{
Statement.Tokens.Add(Tokenizer.Current);
level--;
Tokenizer.MoveNext();
}
while (Tokenizer.Current?.AsKeyword != null &&
Tokenizer.Current.AsKeyword.Keyword.In(
TSQLKeywords.UNION,
TSQLKeywords.EXCEPT,
TSQLKeywords.INTERSECT))
{
TSQLSetOperatorClause set = new TSQLSetOperatorClauseParser().Parse(Tokenizer);
Statement.SetOperators.Add(set);
Statement.Tokens.AddRange(set.Tokens);
}
while (level > 0 && Tokenizer.Current.IsCharacter(TSQLCharacters.CloseParentheses))
{
Statement.Tokens.Add(Tokenizer.Current);
level--;
Tokenizer.MoveNext();
}
if (Tokenizer.Current.IsKeyword(TSQLKeywords.ORDER))
{
TSQLOrderByClause orderByClause = new TSQLOrderByClauseParser().Parse(Tokenizer);
Statement.OrderBy = orderByClause;
Statement.Tokens.AddRange(orderByClause.Tokens);
}
// order for OPTION and FOR doesn't seem to matter
while (
Tokenizer.Current.IsKeyword(TSQLKeywords.FOR) ||
Tokenizer.Current.IsKeyword(TSQLKeywords.OPTION))
{
if (Tokenizer.Current.IsKeyword(TSQLKeywords.FOR))
{
TSQLForClause forClause = new TSQLForClauseParser().Parse(Tokenizer);
Statement.For = forClause;
Statement.Tokens.AddRange(forClause.Tokens);
}
if (Tokenizer.Current.IsKeyword(TSQLKeywords.OPTION))
{
TSQLOptionClause optionClause = new TSQLOptionClauseParser().Parse(Tokenizer);
Statement.Option = optionClause;
Statement.Tokens.AddRange(optionClause.Tokens);
}
}
return(Statement);
}
public TSQLSelectStatement Parse()
{
TSQLSelectClause selectClause = new TSQLSelectClauseParser().Parse(Tokenizer);
Statement.Select = selectClause;
Statement.Tokens.AddRange(selectClause.Tokens);
if (Tokenizer.Current.IsKeyword(TSQLKeywords.INTO))
{
TSQLIntoClause intoClause = new TSQLIntoClauseParser().Parse(Tokenizer);
Statement.Into = intoClause;
Statement.Tokens.AddRange(intoClause.Tokens);
}
if (Tokenizer.Current.IsKeyword(TSQLKeywords.FROM))
{
TSQLFromClause fromClause = new TSQLFromClauseParser().Parse(Tokenizer);
Statement.From = fromClause;
Statement.Tokens.AddRange(fromClause.Tokens);
}
if (Tokenizer.Current.IsKeyword(TSQLKeywords.WHERE))
{
TSQLWhereClause whereClause = new TSQLWhereClauseParser().Parse(Tokenizer);
Statement.Where = whereClause;
Statement.Tokens.AddRange(whereClause.Tokens);
}
if (Tokenizer.Current.IsKeyword(TSQLKeywords.GROUP))
{
TSQLGroupByClause groupByClause = new TSQLGroupByClauseParser().Parse(Tokenizer);
Statement.GroupBy = groupByClause;
Statement.Tokens.AddRange(groupByClause.Tokens);
}
if (Tokenizer.Current.IsKeyword(TSQLKeywords.HAVING))
{
TSQLHavingClause havingClause = new TSQLHavingClauseParser().Parse(Tokenizer);
Statement.Having = havingClause;
Statement.Tokens.AddRange(havingClause.Tokens);
}
if (Tokenizer.Current?.AsKeyword != null &&
Tokenizer.Current.AsKeyword.Keyword.In(
TSQLKeywords.UNION,
TSQLKeywords.EXCEPT,
TSQLKeywords.INTERSECT))
{
TSQLSetOperatorClause set = new TSQLSetOperatorClauseParser().Parse(Tokenizer);
Statement.SetOperator = set;
Statement.Tokens.AddRange(set.Tokens);
}
if (Tokenizer.Current.IsKeyword(TSQLKeywords.ORDER))
{
TSQLOrderByClause orderByClause = new TSQLOrderByClauseParser().Parse(Tokenizer);
Statement.OrderBy = orderByClause;
Statement.Tokens.AddRange(orderByClause.Tokens);
}
// order for OPTION and FOR doesn't seem to matter
while (
Tokenizer.Current.IsKeyword(TSQLKeywords.FOR) ||
Tokenizer.Current.IsKeyword(TSQLKeywords.OPTION))
{
if (Tokenizer.Current.IsKeyword(TSQLKeywords.FOR))
{
TSQLForClause forClause = new TSQLForClauseParser().Parse(Tokenizer);
Statement.For = forClause;
Statement.Tokens.AddRange(forClause.Tokens);
}
if (Tokenizer.Current.IsKeyword(TSQLKeywords.OPTION))
{
TSQLOptionClause optionClause = new TSQLOptionClauseParser().Parse(Tokenizer);
Statement.Option = optionClause;
Statement.Tokens.AddRange(optionClause.Tokens);
}
}
if (
Tokenizer.Current?.AsKeyword != null &&
Tokenizer.Current.AsKeyword.Keyword.IsStatementStart())
{
Tokenizer.Putback();
}
return(Statement);
}