mirror of https://github.com/citusdata/citus.git
41 lines
1.2 KiB
C
41 lines
1.2 KiB
C
/*-------------------------------------------------------------------------
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*
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* multi_shard_transaction.h
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* Type and function declarations used in performing transactions across
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* shard placements.
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*
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* Copyright (c) 2016, Citus Data, Inc.
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef MULTI_SHARD_TRANSACTION_H
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#define MULTI_SHARD_TRANSACTION_H
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#include "utils/hsearch.h"
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#include "nodes/pg_list.h"
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/* ShardConnections represents a set of connections for each placement of a shard */
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typedef struct ShardConnections
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{
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int64 shardId;
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/* list of MultiConnection structs */
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List *connectionList;
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} ShardConnections;
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extern HTAB * OpenTransactionsToAllShardPlacements(List *shardIdList,
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int connectionFlags);
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extern HTAB * CreateShardConnectionHash(MemoryContext memoryContext);
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extern ShardConnections * GetShardHashConnections(HTAB *connectionHash, int64 shardId,
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bool *connectionsFound);
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extern List * ShardConnectionList(HTAB *connectionHash);
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extern void ResetShardPlacementTransactionState(void);
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extern void UnclaimAllShardConnections(HTAB *shardConnectionHash);
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#endif /* MULTI_SHARD_TRANSACTION_H */
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