protected override Task <int> DoDeleteAsync(string executableSql, Dict executableParams)
{
DeleteStatement executableStatement = new DeleteStatement(this.database, executableSql);
var memoryTable = executableStatement.StatementFromRefs[0].table as MemoryTable;
string evaluatedWhereClause = MemoryDatabase.EvaluateWhereClause(executableStatement.whereClause, executableParams, executableStatement.StatementFromRefs);
var dataRows = memoryTable.DataTable.Select(evaluatedWhereClause);
foreach (var dataRow in dataRows)
{
dataRow.Delete();
}
this.changedTables.Add(memoryTable);
return(Task.FromResult(dataRows.Length));
}
protected override Task <int> DoUpdateAsync(string executableSql, Dict executableParams)
{
UpdateStatement executableStatement = new UpdateStatement(this.database, executableSql);
if (!(executableStatement.StatementFromRefs[0].table is MemoryTable memoryTable))
{
throw new Exception("Table is not a MemoryTable");
}
(var whereIndex, var setRefs, var whereRefs) = executableStatement.GetWhereIndexSetRefsAndWhereRefs(this.database, executableParams);
var fieldValues = BaseStatement.RemapStatementParamsToFieldValues(executableParams, setRefs);
string evaluatedWhereClause = MemoryDatabase.EvaluateWhereClause(executableStatement.whereClause, executableParams, executableStatement.StatementFromRefs);
var dataRows = memoryTable.DataTable.Select(evaluatedWhereClause);
int count = 0;
foreach (var dataRow in dataRows)
{
bool changed = false;
foreach ((string name, object value) in fieldValues)
{
//object value = executableParams[setRef.paramName];
if (dataRow[name] != value)
{
dataRow[name] = value;
changed = true;
}
}
if (changed)
{
count++;
}
}
this.changedTables.Add(memoryTable);
return(Task.FromResult(count));
}
public MemoryTransaction(MemoryDatabase database) : base(database)
{
}