public virtual string CompileTableExpression(SqlResult ctx, FromBase from)
{
if (from is RawFromClause raw)
{
ctx.Bindings.AddRange(raw.Bindings);
return(WrapIdentifiers(raw.Expression));
}
if (from is QueryFromClause queryFromClause)
{
var fromQuery = queryFromClause.Query;
var alias = string.IsNullOrEmpty(fromQuery.QueryAlias) ? "" : $" {TableAsKeyword}" + WrapValue(fromQuery.QueryAlias);
var subCtx = CompileSelectQuery(fromQuery);
ctx.Bindings.AddRange(subCtx.Bindings);
return("(" + subCtx.RawSql + ")" + alias);
}
if (from is FromClause fromClause)
{
return(Wrap(fromClause.Table));
}
throw InvalidClauseException("TableExpression", from);
}
public virtual SqlResult CompileCte(FromBase cte)
{
var ctx = new SqlResult();
if (null == cte)
{
return(ctx);
}
if (cte is RawFromClause raw)
{
ctx.Bindings.AddRange(raw.Bindings);
ctx.RawSql = $"{WrapValue(raw.Alias)} AS ({WrapIdentifiers(raw.Expression)})";
}
else if (cte is QueryFromClause queryFromClause)
{
var subCtx = CompileSelectQuery(queryFromClause.Query);
ctx.Bindings.AddRange(subCtx.Bindings);
ctx.RawSql = $"{WrapValue(queryFromClause.Alias)} AS ({subCtx.RawSql})";
}
return(ctx);
}
