public static ICollection <CommandExecutionHandler> ResolveCommandHandlers(OracleStatementSemanticModel semanticModel, StatementGrammarNode currentTerminal)
{
CheckParametersNotNull(semanticModel, currentTerminal);
var commands = new List <CommandExecutionHandler>();
if (currentTerminal.Id != Terminals.Identifier && currentTerminal.Id != Terminals.RowIdPseudocolumn)
{
return(EmptyHandlerCollection);
}
var columnReference = semanticModel.AllReferenceContainers.SelectMany(qb => qb.ColumnReferences).SingleOrDefault(c => c.ColumnNode == currentTerminal);
if (columnReference == null || columnReference.ColumnNodeObjectReferences.Count <= 1)
{
return(EmptyHandlerCollection);
}
var identifiers = OracleObjectIdentifier.GetUniqueReferences(columnReference.ColumnNodeObjectReferences.Select(r => r.FullyQualifiedObjectName).ToArray());
var actions = columnReference.ColumnNodeObjectReferences
.Where(r => identifiers.Contains(r.FullyQualifiedObjectName))
.Select(
r =>
new CommandExecutionHandler
{
Name = r.FullyQualifiedObjectName + "." + columnReference.Name,
ExecutionHandler = c => new ResolveAmbiguousColumnCommand(c, r.FullyQualifiedObjectName + "." + columnReference.Name)
.Execute(),
CanExecuteHandler = c => true
});
commands.AddRange(actions);
return(commands.AsReadOnly());
}
