// return value for system tables
public RelationValue GetCatalogTableValue(CatalogTables table)
{
var tablemaker = CatalogTableMaker.Create(_catalogtableheadings[table]);
_catalogtablemaker[table](tablemaker, PersistentVars.GetEntries());
return(RelationValue.Create(tablemaker.Table));
}
// Store new entry to catalog, perhaps removing old value first
// Currently only for Sql -- Local does total dump
internal void StoreEntry(CatalogEntry entry, CatalogEntry oldentry = null)
{
var ctm = CatalogTableMaker.Create(_catalogtableheading);
if (SqlFlag)
{
var table = DataTableSql.Create(CatalogTableName, _catalogtableheading);
if (oldentry != null)
{
var ctmx = CatalogTableMaker.Create(_catalogtableheading);
ctmx.Table.AddRow(ctmx.MakeEntry(oldentry));
table.UpdateJoin(ctmx.Table, JoinOps.MINUS);
}
ctm.Table.AddRow(ctm.MakeEntry(entry));
table.UpdateJoin(ctm.Table, JoinOps.UNION);
}
}
//--- persistence Mk II
// Store the persistent catalog and modified tables, local only
// note: for Sql, only used to create new empty catalog
public void StoreToTable()
{
Logger.WriteLine(2, "Save catalog for '{0}'", DatabaseName);
var ctm = CatalogTableMaker.Create(_catalogtableheading);
var table = ctm.AddEntries(PersistentVars.GetEntries()).Table;
if (SqlFlag)
{
DataTableSql.Create(CatalogTableName, table);
}
else
{
Persist.Create(DatabasePath, true).Store(CatalogTableName, RelationValue.Create(table));
var savers = PersistentVars.GetEntries().Where(e => e.IsUnsaved);
Logger.WriteLine(2, $"Persist {savers.Count()} entries");
foreach (var entry in savers)
{
Persist.Create(DatabasePath, true).Store(entry.Name, entry.Value);
}
}
}