public ObjectName ResolveColumn(string catalog, string schema, string table, string column)
{
var schemaName = GivenTableName.Parent;
var catalogName = schemaName == null ? null : schemaName.Parent;
var givenCatalog = catalogName != null ? catalogName.Name : null;
if (catalog != null && !StringCompare(catalog, givenCatalog))
throw new InvalidOperationException("Incorrect catalog.");
// Does this table name represent the correct schema?
var givenSchema = GivenTableName.Parent != null ? GivenTableName.Parent.Name : null;
if (schema != null && !StringCompare(schema, givenSchema))
// If schema is present and we can't resolve to this schema
throw new InvalidOperationException("Incorrect schema.");
if (table != null && !StringCompare(table, GivenTableName.Name))
// If table name is present and we can't resolve to this table name
throw new InvalidOperationException("Incorrect table.");
if (column != null) {
if (!IgnoreCase) {
// Can we resolve the column in this table?
int i = tableInfo.IndexOfColumn(column);
if (i == -1)
throw new InvalidOperationException("Could not resolve '" + column + "'");
return new ObjectName(GivenTableName, column);
}
// Case insensitive search (this is slower than case sensitive).
var columnName =
tableInfo.Where(x => StringCompare(x.ColumnName, column))
.Select(x => x.ColumnName)
.FirstOrDefault();
if (String.IsNullOrEmpty(columnName))
throw new InvalidOperationException(String.Format("Could not resolve column '{0}' within the table '{1}'.", column,
GivenTableName));
return new ObjectName(GivenTableName, columnName);
}
// Return the first column in the table
return new ObjectName(GivenTableName, tableInfo[0].ColumnName);
}
