internal DynamoDbGlobalSecondaryIndexThroughput(string tableName, GlobalSecondaryIndexDescription indexDescription)
: base(tableName, indexDescription.ProvisionedThroughput)
{
IndexName = indexDescription.IndexName;
}
/// <summary>
/// Tries to make up a query request from the list of conditions using a global secondary index
/// </summary>
internal static bool TryGetQueryFilterForGlobalSeconaryIndex(this TranslationResult translationResult, GlobalSecondaryIndexDescription indexDescription, out QueryFilter resultFilter)
{
resultFilter = null;
string hashKeyFieldName = indexDescription.KeySchema.Single(ks => ks.KeyType == "HASH").AttributeName;
Primitive hashKeyValue;
if (!translationResult.Conditions.TryGetValueForKey(hashKeyFieldName, out hashKeyValue))
{
return false;
}
if (hashKeyValue == null)
{
throw new NotSupportedException("Hash key value should not be null");
}
resultFilter = new QueryFilter(hashKeyFieldName, QueryOperator.Equal, hashKeyValue);
// Copying the list of conditions. without HashKey condition, which is already matched.
var conditions = translationResult.Conditions.ExcludeField(hashKeyFieldName);
if (conditions.Count <= 0)
{
return true;
}
var rangeKeyElement = indexDescription.KeySchema.SingleOrDefault(ks => ks.KeyType == "RANGE");
if (rangeKeyElement == null)
{
return false;
}
// first trying to search by range key
if(TryMatchFieldWithCondition(rangeKeyElement.AttributeName, resultFilter, conditions))
{
return TryPutRemainingConditionsToQueryFilter(resultFilter, conditions);
}
return false;
}
internal DynamoDbGlobalSecondaryIndexThroughput(
TableDescription tableDescription,
GlobalSecondaryIndexDescription indexDescription)
: this(tableDescription.TableName, indexDescription)
{
}