void SysStatsAddOrUpdate(string tabcol, ColumnStat stat)
{
if (RetrieveColumnStat(tabcol) is null)
{
records_.Add(tabcol, stat);
}
else
{
records_[tabcol] = stat;
}
}
public void jsonPostProcess(ColumnStat stat)
{
if (stat.hist_ != null)
{
for (int i = 0; i < stat.hist_.buckets_.Length; i++)
{
stat.hist_.buckets_[i] = ExtractValue((JsonElement)stat.hist_.buckets_[i]);
}
}
if (stat.mcv_ != null && stat.mcv_.nvalues_ != 0)
{
int i = 0;
while (stat.mcv_.values_[i] != null)
{
stat.mcv_.values_[i] = ExtractValue((JsonElement)stat.mcv_.values_[i]);
i++;
}
}
}
public List <ColumnStat> GetOrCreateTableStats(string tabName)
{
var table = Catalog.systable_.Table(tabName);
var columns = table.columns_;
List <ColumnStat> stats = new List <ColumnStat>();
foreach (var v in columns)
{
var colName = v.Value.name_;
var stat = GetColumnStat(tabName, colName);
if (stat is null)
{
stat = new ColumnStat();
AddOrUpdate(tabName, colName, stat);
}
stats.Add(stat);
}
Debug.Assert(stats.Count == columns.Count);
return(stats);
}
public void AddOrUpdate(string tabName, string colName, ColumnStat stat)
{
string tabcol = tabName + colName;
SysStatsAddOrUpdate(tabcol, stat);
}