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A chunk copy/move operation is carried out in stages and it can fail in any of them. We track the last completed stage in the "chunk_copy_operation" catalog table. In case of failure, a "chunk_copy_cleanup" function can be invoked to bring the chunk back to its original state on the source datanode and all transient objects like replication slot, publication, subscription, empty chunk, metadata updates, etc are cleaned up. Includes test case changes for each and every stage induced failure. To avoid confusion between chunk copy activity and chunk copy operation this patch also consistently uses "operation" everywhere now instead of "activity"
49 lines
2.3 KiB
SQL
49 lines
2.3 KiB
SQL
-- This file and its contents are licensed under the Apache License 2.0.
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-- Please see the included NOTICE for copyright information and
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-- LICENSE-APACHE for a copy of the license.
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------------------------------------------------------------------------
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-- Experimental DDL functions and APIs.
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--
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-- Users should not rely on these functions unless they accept that
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-- they can change and/or be removed at any time.
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------------------------------------------------------------------------
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-- Block new chunk creation on a data node for a distributed
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-- hypertable. NULL hypertable means it will block chunks for all
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-- distributed hypertables
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CREATE OR REPLACE FUNCTION timescaledb_experimental.block_new_chunks(data_node_name NAME, hypertable REGCLASS = NULL, force BOOLEAN = FALSE) RETURNS INTEGER
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AS '@MODULE_PATHNAME@', 'ts_data_node_block_new_chunks' LANGUAGE C VOLATILE;
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-- Allow chunk creation on a blocked data node for a distributed
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-- hypertable. NULL hypertable means it will allow chunks for all
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-- distributed hypertables
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CREATE OR REPLACE FUNCTION timescaledb_experimental.allow_new_chunks(data_node_name NAME, hypertable REGCLASS = NULL) RETURNS INTEGER
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AS '@MODULE_PATHNAME@', 'ts_data_node_allow_new_chunks' LANGUAGE C VOLATILE;
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CREATE OR REPLACE FUNCTION timescaledb_experimental.refresh_continuous_aggregate(
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continuous_aggregate REGCLASS,
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hypertable_chunk REGCLASS
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) RETURNS VOID AS '@MODULE_PATHNAME@', 'ts_continuous_agg_refresh_chunk' LANGUAGE C VOLATILE;
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CREATE OR REPLACE PROCEDURE timescaledb_experimental.move_chunk(
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chunk REGCLASS,
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source_node NAME = NULL,
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destination_node NAME = NULL)
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AS '@MODULE_PATHNAME@', 'ts_move_chunk_proc' LANGUAGE C;
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CREATE OR REPLACE PROCEDURE timescaledb_experimental.copy_chunk(
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chunk REGCLASS,
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source_node NAME = NULL,
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destination_node NAME = NULL)
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AS '@MODULE_PATHNAME@', 'ts_copy_chunk_proc' LANGUAGE C;
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-- A copy_chunk or move_chunk procedure call involves multiple nodes and
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-- depending on the data size can take a long time. Failures are possible
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-- when this long running activity is ongoing. We need to be able to recover
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-- and cleanup such failed chunk copy/move activities and it's done via this
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-- procedure
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CREATE OR REPLACE PROCEDURE timescaledb_experimental.cleanup_copy_chunk_operation(
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operation_id NAME)
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AS '@MODULE_PATHNAME@', 'ts_copy_chunk_cleanup_proc' LANGUAGE C;
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