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02f7d7aa48
This change introduces two ways of fetching data from data nodes: one using cursors and another one using row-by-row mode. The major benefit of row-by-row mode is that it enables running parallel plans on data nodes. The default data fetcher uses row-by-row mode. A new GUC `timescaledb.remote_data_fetcher` has been added to enable switching between these two implementations (rowbyrow or cursor).
34 lines
1.1 KiB
SQL
34 lines
1.1 KiB
SQL
-- This file and its contents are licensed under the Timescale License.
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-- Please see the included NOTICE for copyright information and
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-- LICENSE-TIMESCALE for a copy of the license.
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\c :TEST_DBNAME :ROLE_CLUSTER_SUPERUSER;
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\set TEST_BASE_NAME data_fetcher
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SELECT format('include/%s_load.sql', :'TEST_BASE_NAME') as "TEST_LOAD_NAME",
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format('include/%s_run.sql', :'TEST_BASE_NAME') as "TEST_QUERY_NAME",
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format('%s/results/%s_results_cursor.out', :'TEST_OUTPUT_DIR', :'TEST_BASE_NAME') as "TEST_RESULTS_CURSOR",
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format('%s/results/%s_results_row_by_row.out', :'TEST_OUTPUT_DIR', :'TEST_BASE_NAME') as "TEST_RESULTS_ROW_BY_ROW"
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\gset
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SELECT format('\! diff %s %s', :'TEST_RESULTS_CURSOR', :'TEST_RESULTS_ROW_BY_ROW') as "DIFF_CMD"
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\gset
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SET client_min_messages TO warning;
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\ir :TEST_LOAD_NAME
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\set ECHO errors
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SET client_min_messages TO error;
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-- run the queries using row by row fetcher
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\o :TEST_RESULTS_ROW_BY_ROW
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\ir :TEST_QUERY_NAME
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\o
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-- run queries using cursor fetcher
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SET timescaledb.remote_data_fetcher = cursor;
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\o :TEST_RESULTS_CURSOR
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\ir :TEST_QUERY_NAME
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\o
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-- compare results
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:DIFF_CMD
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