private List<string> _LoadIdsByConditions(DbCommand command, ITableSpec table, penartur.Web.Core.DB.conditions.AbstractCondition conditions, Diapasone diapasone, JoinSpec[] joins, SortSpec[] sorts, ColumnSpec idSpec, bool allowHugeLists)
{
using(var logger = this.CreateCommandExecutionLogger()) {
command.CommandType = System.Data.CommandType.Text;
var conditionsCompiled = ConditionCompiler.Compile(conditions, this.traits);
string queryConditions = "";
if(conditionsCompiled.Key != "") queryConditions = "WHERE " + conditionsCompiled.Key;
ParamsHolder paramsHolder = conditionsCompiled.Value;
StringBuilder queryJoins = new StringBuilder();
{
foreach(var join in joins) {
queryJoins.Append(" JOIN ");
queryJoins.Append(join.additionalTableRaw.compile(this.traits));
queryJoins.Append(" ");
queryJoins.Append(join.additionalTable.compile(this.traits));
queryJoins.Append(" ON ");
queryJoins.Append(join.mainColumn.compile(this.traits));
queryJoins.Append(" = ");
queryJoins.Append(join.additionalTable.getIdSpec().compile(this.traits));
}
}
string querySorts = "";
if(sorts.Length > 0) {
List<string> sortParts = new List<string>();
foreach(SortSpec sortSpec in sorts) {
if(sortSpec.ascending) {
sortParts.Add(sortSpec.column.compile(this.traits) + " ASC");
} else {
sortParts.Add(sortSpec.column.compile(this.traits) + " DESC");
}
}
querySorts = "ORDER BY " + string.Join(", ", sortParts.ToArray());
}
string queryMain = "FROM " + table.compile(this.traits) + " " + queryJoins + " " + queryConditions;
foreach(KeyValuePair<string, string> kvp in paramsHolder.data) {
command.AddParameter(kvp.Key, kvp.Value);
}
if(!diapasone.total.HasValue) {
command.CommandText = logger.commandText = "SELECT COUNT(*) " + queryMain;
object rawCount;
//try {
rawCount = command.ExecuteScalar();
//} catch(Npgsql.NpgsqlException e) {
//throw new FLocalException("Error while trying to execute " + command.CommandText + ": " + e.Message);
//}
long count = (long)rawCount;
if(count < 1) {
diapasone.total = 0;
} else {
diapasone.total = count;
}
}
if(diapasone.total.Value < 1) {
return new List<string>();
} else {
if(diapasone.total.Value > 1000 && diapasone.count < 0 && !allowHugeLists) {
throw new CriticalException("huge list");
}
string queryLimits = "";
if(diapasone.count >= 0) {
queryLimits = "LIMIT " + diapasone.count + " OFFSET " + diapasone.start;
}
command.CommandText = logger.commandText = "SELECT " + idSpec.compile(this.traits) + " " + queryMain + " " + querySorts + " " + queryLimits;
List<string> result = new List<string>();
using(DbDataReader reader = command.ExecuteReader()) {
while(reader.Read()) {
result.Add(reader.GetValue(0).ToString());
}
}
return result;
}
}
}
