private static string FormatGetTimeoutsDueQuery(SqlDialect dialect, string tableName, uint batchSize)
{
var forUpdateStmt = string.Empty;
var skipLockedStmt = string.Empty;
var lockPredicate = string.Empty;
var limitPredicate = string.Empty;
if (dialect.SupportsSelectForUpdate && dialect.SupportsSkipLockedFunction)
{
forUpdateStmt = dialect.ParameterSelectForUpdate;
skipLockedStmt = dialect.ParameterSkipLocked;
}
else if (dialect.SupportsTryAdvisoryXactLockFunction)
{
lockPredicate = $"AND " + dialect.FormatTryAdvisoryXactLock(new[] { "id" });
}
else if (dialect.SupportsTryAdvisoryLockFunction)
{
lockPredicate = $"AND " + dialect.FormatTryAdvisoryLock(new[] { "id" });
}
if (batchSize != 0)
{
limitPredicate = "LIMIT " + batchSize;
}
return($"SELECT id, time_to_return, correlation_id, saga_id, reply_to, custom_data " +
$"FROM {tableName} " +
$"WHERE time_to_return <= @current_time {lockPredicate} " +
$"ORDER BY time_to_return ASC " +
$"{forUpdateStmt} {skipLockedStmt} " +
$"{limitPredicate}");
}