public bool VisitExprDerivedTableQuery(ExprDerivedTableQuery expr, TCtx arg)
{
var res = this.Visit(expr, "DerivedTableQuery", arg, out var argOut) && this.Accept("Query", expr.Query, argOut) && this.Accept("Alias", expr.Alias, argOut) && this.Accept("Columns", expr.Columns, argOut);
this._visitor.EndVisitExpr(expr, arg);
return(res);
}
public bool VisitExprDerivedTableQuery(ExprDerivedTableQuery exprDerivedTableQuery, IExpr?parent)
{
this.AcceptPar('(', exprDerivedTableQuery.Query, ')', exprDerivedTableQuery);
exprDerivedTableQuery.Alias.Accept(this, exprDerivedTableQuery);
if (exprDerivedTableQuery.Columns != null)
{
exprDerivedTableQuery.Columns.AssertNotEmpty("List of columns in a derived table with values literals cannot be empty");
var selectedColumns = exprDerivedTableQuery.Query.GetOutputColumnNames();
if (selectedColumns.Count != exprDerivedTableQuery.Columns.Count)
{
throw new SqExpressException("Number of declared columns does not match to number of selected columns in the derived table sub query");
}
bool allMatch = true;
for (int i = 0; i < selectedColumns.Count; i++)
{
if (!string.Equals(selectedColumns[i],
((IExprNamedSelecting)exprDerivedTableQuery.Columns[i]).OutputName))
{
allMatch = false;
break;
}
}
if (!allMatch)
{
this.AcceptListComaSeparatedPar('(', exprDerivedTableQuery.Columns, ')', exprDerivedTableQuery);
}
}
return(true);
}
public static ExprDerivedTableQuery WithColumns(this ExprDerivedTableQuery original, IReadOnlyList <ExprColumnName>?newColumns) => new ExprDerivedTableQuery(query: original.Query, alias: original.Alias, columns: newColumns);
public static ExprDerivedTableQuery WithAlias(this ExprDerivedTableQuery original, ExprTableAlias newAlias) => new ExprDerivedTableQuery(query: original.Query, alias: newAlias, columns: original.Columns);
public static ExprDerivedTableQuery WithQuery(this ExprDerivedTableQuery original, IExprSubQuery newQuery) => new ExprDerivedTableQuery(query: newQuery, alias: original.Alias, columns: original.Columns);
