public static KeyValuePair <string, ParamsHolder> Compile(AbstractCondition condition, IDBTraits traits)
{
ConditionCompiler compiler = new ConditionCompiler(traits);
string compiled = compiler.CompileCondition(condition);
return(new KeyValuePair <string, ParamsHolder>(compiled, compiler.paramsholder));
}
public long GetCountByConditions(ITableSpec table, Web.Core.DB.conditions.AbstractCondition conditions, params JoinSpec[] joins)
{
using (var logger = this.CreateCommandExecutionLogger()) {
using (DbConnection connection = this.createConnection()) {
using (DbCommand command = connection.CreateCommand()) {
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;
string queryJoins = "";
{
if (joins.Length > 0)
{
throw new NotImplementedException();
}
}
command.CommandText = logger.commandText = "SELECT COUNT(*) " + "FROM " + table.compile(this.traits) + " " + queryJoins + " " + queryConditions;
foreach (KeyValuePair <string, string> kvp in paramsHolder.data)
{
command.AddParameter(kvp.Key, kvp.Value);
}
object rawCount = command.ExecuteScalar();
long count = (long)rawCount;
return(count);
}
}
}
}
private List <string> _LoadIdsByConditions(DbCommand command, ITableSpec table, 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);
}
}
}