protected SqlColRefListItem ParseColListItem(SymbolPosition commapos)
{
var expr = ParseExpression();
SqlMultiKeyWord modifier = ParseMultiKeyword("asc") ?? ParseMultiKeyword("desc");
return(new SqlColRefListItem(commapos == null, commapos, expr, modifier));
}
public SqlCommandClause(SqlMultiKeyWord prefix)
{
Prefix = prefix;
if (Prefix != null)
{
Prefix.Parent = this;
}
}
private SqlSourceList ParseSourceList()
{
var src1 = ParseSourceItem();
List <SqlJoin> joins = new List <SqlJoin>();
for (; ;)
{
SqlJoin join;
if (IsSymbol(","))
{
var cpos = SkipSymbol(",");
var src = ParseSourceItem();
var cpre = new SqlMultiKeyWord(new SymbolPosition[] { cpos }, new string[] { "," });
join = new SqlJoin(cpre, src, null, null);
}
else
{
SymbolPosition natpos = null;
if (IsKeyword("natural"))
{
natpos = SkipKeyword("natural");
}
var pre = ParseMultiKeyword("left", "join")
?? ParseMultiKeyword("right", "join")
?? ParseMultiKeyword("left", "outer", "join")
?? ParseMultiKeyword("right", "outer", "join")
?? ParseMultiKeyword("inner", "join")
?? ParseMultiKeyword("outer", "join")
?? ParseMultiKeyword("cross", "join")
?? ParseMultiKeyword("join");
if (pre == null)
{
if (natpos != null)
{
GoBack(1);
}
break;
}
if (natpos != null)
{
pre.ClauseWords.Insert(0, "natural");
pre.ClauseWordsPos.Insert(0, natpos);
}
var src = ParseSourceItem();
SymbolPosition onpos = null;
SqlExpression cond = null;
if (IsKeyword("on"))
{
onpos = SkipKeyword("on");
cond = ParseExpression();
}
join = new SqlJoin(pre, src, onpos, cond);
}
joins.Add(join);
}
return(new SqlSourceList(src1, joins));
}
public SqlColRefListItem(bool isfirst, SymbolPosition commapos, SqlExpression argument, SqlMultiKeyWord modifier)
{
CommaPos = commapos;
Argument = argument;
IsFirst = isfirst;
Modifier = modifier;
Argument.Parent = this;
if (Modifier != null)
{
Modifier.Parent = this;
}
}
public static bool Equals(SqlMultiKeyWord a, SqlMultiKeyWord b, SqlEqualityTestProps props)
{
if (a == null)
{
return(b == null);
}
if (b == null)
{
return(a == null);
}
return(a.ClauseWords.CreateDelimitedText(" ").ToLower() == b.ClauseWords.CreateDelimitedText(" ").ToLower());
}
public SqlJoin(SqlMultiKeyWord joinPrefix, SqlSourceItem source, SymbolPosition onpos, SqlExpression cond)
{
JoinPrefix = joinPrefix;
Source = source;
OnPos = onpos;
Condition = cond;
JoinPrefix.Parent = this;
Source.Parent = this;
if (Condition != null)
{
Condition.Parent = this;
}
}
private SqlCommandClause ParseFromClause(bool mustHaveFrom)
{
SqlMultiKeyWord prefix = null;
if (mustHaveFrom)
{
prefix = ParseMultiKeyword("from");
if (prefix == null)
{
return(null);
}
}
var list = ParseSourceList();
return(new SqlFromClause(prefix, list));
}
public SqlHavingClause(SqlMultiKeyWord prefix, SqlExpression cond)
: base(prefix, cond)
{
}
public SqlConditionClause(SqlMultiKeyWord prefix, SqlExpression cond)
: base(prefix)
{
Condition = cond;
Condition.Parent = this;
}
public SqlGroupByClause(SqlMultiKeyWord prefix, SqlColRefList items)
: base(prefix, items)
{
}
public SqlColumnListClause(SqlMultiKeyWord prefix, SqlColRefList items)
: base(prefix)
{
Items = items;
Items.Parent = this;
}
public SqlFromClause(SqlMultiKeyWord prefix, SqlSourceList source)
: base(prefix)
{
Source = source;
Source.Parent = this;
}
public bool EqualTo(SqlColRefList other, SqlEqualityTestProps props)
{
return(Items.EqualSequence(other.Items, (a, b) => a.Argument.FlatEqualTo(b.Argument, props) && SqlMultiKeyWord.Equals(a.Modifier, b.Modifier, props)));
throw new NotImplementedError("DAE-00116");
}
