重分布函数

以下函数为重分布期间gs_redis工具所用的系统函数，用户不要主动调用：

• pg_get_redis_rel_end_ctid(text, name, int, int)
• pg_get_redis_rel_start_ctid(text, name, int, int)

  示例：

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  gaussdb=# SELECT COUNT(1) FROM ONLY test WHERE ctid BETWEEN pg_get_redis_rel_start_ctid(E'test'::text,NULL::name,0,0) AND pg_get_redis_rel_end_ctid(E'test'::text,NULL::name,0,0); count ------- 0 (1 row)

• pg_enable_redis_proc_cancelable()

  示例：

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  gaussdb=# select pg_enable_redis_proc_cancelable(); pg_enable_redis_proc_cancelable --------------------------------- t

• pg_disable_redis_proc_cancelable()

  示例：

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  gaussdb=# select pg_disable_redis_proc_cancelable(); pg_disable_redis_proc_cancelable --------------------------------- t

• pg_tupleid_get_blocknum(tid)

  示例：

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  gaussdb=# SELECT pg_tupleid_get_blocknum(ctid::tid) FROM test; pg_tupleid_get_blocknum ------------------------- 0 (1 row)

• pg_tupleid_get_offset(tid)

  示例：

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  gaussdb=# SELECT pg_tupleid_get_offset(ctid::tid) FROM test; pg_tupleid_get_offset ------------------------- 1 (1 row)

• pg_tupleid_get_ctid_to_bigint (ctid)

  示例：

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  gaussdb=# SELECT pg_tupleid_get_ctid_to_bigint(ctid::tid) FROM test; pg_tupleid_get_ctid_to_bigint ------------------------------- 1 (1 row)