mirror of
https://github.com/timescale/timescaledb.git
synced 2025-05-18 19:59:48 +08:00
Fix crash in EXPLAIN VERBOSE on dist table
The crash is occurring in "fdw_scan_explain" function because the fsstate passed in is NULL and we try to access the "fetcher_type" field from it in VERBOSE mode. When we are doing EXPLAIN, we short circuit the init foreign scan calls and that's why fsstate is not filled up. Fixes #3960
This commit is contained in:
Nikhil Sontakke
Nikhil
parent
4762908bc8
commit
4aeb1330f3
@ -449,6 +449,9 @@ fdw_scan_explain(ScanState *ss, List *fdw_private, ExplainState *es, TsFdwScanSt
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char *sql;
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ExplainPropertyText("Data node", server->servername, es);
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/* fsstate can be NULL, so check that first */
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if (fsstate)
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ExplainPropertyText("Fetcher Type", explain_fetcher_type(fsstate->fetcher_type), es);
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if (chunk_oids != NIL)
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@ -474,7 +477,8 @@ fdw_scan_explain(ScanState *ss, List *fdw_private, ExplainState *es, TsFdwScanSt
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ExplainPropertyText("Remote SQL", sql, es);
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if (ts_guc_enable_remote_explain)
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/* fsstate should be set up but better check again to avoid crashes */
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if (ts_guc_enable_remote_explain && fsstate)
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{
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const char *data_node_explain =
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get_data_node_explain(fsstate->query, fsstate->conn, es);
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@ -229,6 +229,102 @@ INSERT INTO disttable VALUES
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('2018-07-01 08:01', 29, 1.5),
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('2018-07-01 09:21', 90, 2.8),
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('2018-07-01 08:21', 29, 1.2);
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-- EXPLAIN some updates/deletes to see what plans and explain output for
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-- remote operations look like
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EXPLAIN (VERBOSE, COSTS FALSE)
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UPDATE disttable SET temp = 3.7 WHERE device = 1;
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QUERY PLAN
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----------------------------------------------------------------------------------------------------------------------------------
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Update on public.disttable
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Update on public.disttable
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Foreign Update on _timescaledb_internal._dist_hyper_1_1_chunk
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Remote SQL: UPDATE _timescaledb_internal._dist_hyper_1_1_chunk SET temp = $2 WHERE ctid = $1
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Foreign Update on _timescaledb_internal._dist_hyper_1_2_chunk
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Remote SQL: UPDATE _timescaledb_internal._dist_hyper_1_2_chunk SET temp = $2 WHERE ctid = $1
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Foreign Update on _timescaledb_internal._dist_hyper_1_3_chunk
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Remote SQL: UPDATE _timescaledb_internal._dist_hyper_1_3_chunk SET temp = $2 WHERE ctid = $1
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Foreign Update on _timescaledb_internal._dist_hyper_1_4_chunk
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Remote SQL: UPDATE _timescaledb_internal._dist_hyper_1_4_chunk SET temp = $2 WHERE ctid = $1
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Foreign Update on _timescaledb_internal._dist_hyper_1_5_chunk
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Remote SQL: UPDATE _timescaledb_internal._dist_hyper_1_5_chunk SET temp = $2 WHERE ctid = $1
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Foreign Update on _timescaledb_internal._dist_hyper_1_6_chunk
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Remote SQL: UPDATE _timescaledb_internal._dist_hyper_1_6_chunk SET temp = $2 WHERE ctid = $1
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-> Seq Scan on public.disttable
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Output: disttable."time", disttable.device, NULL::integer, '3.7'::double precision, disttable.ctid
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Filter: (disttable.device = 1)
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-> Foreign Scan on _timescaledb_internal._dist_hyper_1_1_chunk
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Output: _dist_hyper_1_1_chunk."time", _dist_hyper_1_1_chunk.device, '3.7'::double precision, _dist_hyper_1_1_chunk.ctid
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Data node: db_dist_hypertable_1
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Remote SQL: SELECT "time", device, ctid FROM _timescaledb_internal._dist_hyper_1_1_chunk WHERE ((device = 1)) FOR UPDATE
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-> Foreign Scan on _timescaledb_internal._dist_hyper_1_2_chunk
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Output: _dist_hyper_1_2_chunk."time", _dist_hyper_1_2_chunk.device, '3.7'::double precision, _dist_hyper_1_2_chunk.ctid
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Data node: db_dist_hypertable_3
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Remote SQL: SELECT "time", device, ctid FROM _timescaledb_internal._dist_hyper_1_2_chunk WHERE ((device = 1)) FOR UPDATE
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-> Foreign Scan on _timescaledb_internal._dist_hyper_1_3_chunk
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Output: _dist_hyper_1_3_chunk."time", _dist_hyper_1_3_chunk.device, '3.7'::double precision, _dist_hyper_1_3_chunk.ctid
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Data node: db_dist_hypertable_2
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Remote SQL: SELECT "time", device, ctid FROM _timescaledb_internal._dist_hyper_1_3_chunk WHERE ((device = 1)) FOR UPDATE
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-> Foreign Scan on _timescaledb_internal._dist_hyper_1_4_chunk
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Output: _dist_hyper_1_4_chunk."time", _dist_hyper_1_4_chunk.device, '3.7'::double precision, _dist_hyper_1_4_chunk.ctid
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Data node: db_dist_hypertable_1
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Remote SQL: SELECT "time", device, ctid FROM _timescaledb_internal._dist_hyper_1_4_chunk WHERE ((device = 1)) FOR UPDATE
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-> Foreign Scan on _timescaledb_internal._dist_hyper_1_5_chunk
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Output: _dist_hyper_1_5_chunk."time", _dist_hyper_1_5_chunk.device, '3.7'::double precision, _dist_hyper_1_5_chunk.ctid
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Data node: db_dist_hypertable_2
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Remote SQL: SELECT "time", device, ctid FROM _timescaledb_internal._dist_hyper_1_5_chunk WHERE ((device = 1)) FOR UPDATE
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-> Foreign Scan on _timescaledb_internal._dist_hyper_1_6_chunk
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Output: _dist_hyper_1_6_chunk."time", _dist_hyper_1_6_chunk.device, '3.7'::double precision, _dist_hyper_1_6_chunk.ctid
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Data node: db_dist_hypertable_3
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Remote SQL: SELECT "time", device, ctid FROM _timescaledb_internal._dist_hyper_1_6_chunk WHERE ((device = 1)) FOR UPDATE
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(41 rows)
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EXPLAIN (VERBOSE, COSTS FALSE)
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DELETE FROM disttable WHERE device = 1;
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QUERY PLAN
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------------------------------------------------------------------------------------------------------------------
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Delete on public.disttable
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Delete on public.disttable
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Foreign Delete on _timescaledb_internal._dist_hyper_1_1_chunk
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Remote SQL: DELETE FROM _timescaledb_internal._dist_hyper_1_1_chunk WHERE ctid = $1
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Foreign Delete on _timescaledb_internal._dist_hyper_1_2_chunk
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Remote SQL: DELETE FROM _timescaledb_internal._dist_hyper_1_2_chunk WHERE ctid = $1
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Foreign Delete on _timescaledb_internal._dist_hyper_1_3_chunk
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Remote SQL: DELETE FROM _timescaledb_internal._dist_hyper_1_3_chunk WHERE ctid = $1
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Foreign Delete on _timescaledb_internal._dist_hyper_1_4_chunk
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Remote SQL: DELETE FROM _timescaledb_internal._dist_hyper_1_4_chunk WHERE ctid = $1
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Foreign Delete on _timescaledb_internal._dist_hyper_1_5_chunk
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Remote SQL: DELETE FROM _timescaledb_internal._dist_hyper_1_5_chunk WHERE ctid = $1
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Foreign Delete on _timescaledb_internal._dist_hyper_1_6_chunk
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Remote SQL: DELETE FROM _timescaledb_internal._dist_hyper_1_6_chunk WHERE ctid = $1
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-> Seq Scan on public.disttable
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Output: disttable.ctid
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Filter: (disttable.device = 1)
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-> Foreign Scan on _timescaledb_internal._dist_hyper_1_1_chunk
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Output: _dist_hyper_1_1_chunk.ctid
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Data node: db_dist_hypertable_1
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Remote SQL: SELECT ctid FROM _timescaledb_internal._dist_hyper_1_1_chunk WHERE ((device = 1)) FOR UPDATE
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-> Foreign Scan on _timescaledb_internal._dist_hyper_1_2_chunk
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Output: _dist_hyper_1_2_chunk.ctid
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Data node: db_dist_hypertable_3
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Remote SQL: SELECT ctid FROM _timescaledb_internal._dist_hyper_1_2_chunk WHERE ((device = 1)) FOR UPDATE
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-> Foreign Scan on _timescaledb_internal._dist_hyper_1_3_chunk
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Output: _dist_hyper_1_3_chunk.ctid
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Data node: db_dist_hypertable_2
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Remote SQL: SELECT ctid FROM _timescaledb_internal._dist_hyper_1_3_chunk WHERE ((device = 1)) FOR UPDATE
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-> Foreign Scan on _timescaledb_internal._dist_hyper_1_4_chunk
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Output: _dist_hyper_1_4_chunk.ctid
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Data node: db_dist_hypertable_1
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Remote SQL: SELECT ctid FROM _timescaledb_internal._dist_hyper_1_4_chunk WHERE ((device = 1)) FOR UPDATE
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-> Foreign Scan on _timescaledb_internal._dist_hyper_1_5_chunk
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Output: _dist_hyper_1_5_chunk.ctid
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Data node: db_dist_hypertable_2
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Remote SQL: SELECT ctid FROM _timescaledb_internal._dist_hyper_1_5_chunk WHERE ((device = 1)) FOR UPDATE
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-> Foreign Scan on _timescaledb_internal._dist_hyper_1_6_chunk
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Output: _dist_hyper_1_6_chunk.ctid
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Data node: db_dist_hypertable_3
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Remote SQL: SELECT ctid FROM _timescaledb_internal._dist_hyper_1_6_chunk WHERE ((device = 1)) FOR UPDATE
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(41 rows)
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-- Test distributed ANALYZE.
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--
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-- First show no statistics
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@ -229,6 +229,102 @@ INSERT INTO disttable VALUES
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('2018-07-01 08:01', 29, 1.5),
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('2018-07-01 09:21', 90, 2.8),
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('2018-07-01 08:21', 29, 1.2);
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-- EXPLAIN some updates/deletes to see what plans and explain output for
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-- remote operations look like
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EXPLAIN (VERBOSE, COSTS FALSE)
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UPDATE disttable SET temp = 3.7 WHERE device = 1;
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QUERY PLAN
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----------------------------------------------------------------------------------------------------------------------------------
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Update on public.disttable
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Update on public.disttable
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Foreign Update on _timescaledb_internal._dist_hyper_1_1_chunk disttable_1
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Remote SQL: UPDATE _timescaledb_internal._dist_hyper_1_1_chunk SET temp = $2 WHERE ctid = $1
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Foreign Update on _timescaledb_internal._dist_hyper_1_2_chunk disttable_2
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Remote SQL: UPDATE _timescaledb_internal._dist_hyper_1_2_chunk SET temp = $2 WHERE ctid = $1
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Foreign Update on _timescaledb_internal._dist_hyper_1_3_chunk disttable_3
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Remote SQL: UPDATE _timescaledb_internal._dist_hyper_1_3_chunk SET temp = $2 WHERE ctid = $1
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Foreign Update on _timescaledb_internal._dist_hyper_1_4_chunk disttable_4
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Remote SQL: UPDATE _timescaledb_internal._dist_hyper_1_4_chunk SET temp = $2 WHERE ctid = $1
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Foreign Update on _timescaledb_internal._dist_hyper_1_5_chunk disttable_5
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Remote SQL: UPDATE _timescaledb_internal._dist_hyper_1_5_chunk SET temp = $2 WHERE ctid = $1
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Foreign Update on _timescaledb_internal._dist_hyper_1_6_chunk disttable_6
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Remote SQL: UPDATE _timescaledb_internal._dist_hyper_1_6_chunk SET temp = $2 WHERE ctid = $1
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-> Seq Scan on public.disttable
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Output: disttable."time", disttable.device, NULL::integer, '3.7'::double precision, disttable.ctid
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Filter: (disttable.device = 1)
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-> Foreign Scan on _timescaledb_internal._dist_hyper_1_1_chunk disttable_1
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Output: disttable_1."time", disttable_1.device, '3.7'::double precision, disttable_1.ctid
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Data node: db_dist_hypertable_1
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Remote SQL: SELECT "time", device, ctid FROM _timescaledb_internal._dist_hyper_1_1_chunk WHERE ((device = 1)) FOR UPDATE
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-> Foreign Scan on _timescaledb_internal._dist_hyper_1_2_chunk disttable_2
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Output: disttable_2."time", disttable_2.device, '3.7'::double precision, disttable_2.ctid
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Data node: db_dist_hypertable_3
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Remote SQL: SELECT "time", device, ctid FROM _timescaledb_internal._dist_hyper_1_2_chunk WHERE ((device = 1)) FOR UPDATE
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-> Foreign Scan on _timescaledb_internal._dist_hyper_1_3_chunk disttable_3
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Output: disttable_3."time", disttable_3.device, '3.7'::double precision, disttable_3.ctid
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Data node: db_dist_hypertable_2
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Remote SQL: SELECT "time", device, ctid FROM _timescaledb_internal._dist_hyper_1_3_chunk WHERE ((device = 1)) FOR UPDATE
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-> Foreign Scan on _timescaledb_internal._dist_hyper_1_4_chunk disttable_4
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Output: disttable_4."time", disttable_4.device, '3.7'::double precision, disttable_4.ctid
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Data node: db_dist_hypertable_1
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Remote SQL: SELECT "time", device, ctid FROM _timescaledb_internal._dist_hyper_1_4_chunk WHERE ((device = 1)) FOR UPDATE
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-> Foreign Scan on _timescaledb_internal._dist_hyper_1_5_chunk disttable_5
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Output: disttable_5."time", disttable_5.device, '3.7'::double precision, disttable_5.ctid
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Data node: db_dist_hypertable_2
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Remote SQL: SELECT "time", device, ctid FROM _timescaledb_internal._dist_hyper_1_5_chunk WHERE ((device = 1)) FOR UPDATE
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-> Foreign Scan on _timescaledb_internal._dist_hyper_1_6_chunk disttable_6
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Output: disttable_6."time", disttable_6.device, '3.7'::double precision, disttable_6.ctid
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Data node: db_dist_hypertable_3
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Remote SQL: SELECT "time", device, ctid FROM _timescaledb_internal._dist_hyper_1_6_chunk WHERE ((device = 1)) FOR UPDATE
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(41 rows)
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EXPLAIN (VERBOSE, COSTS FALSE)
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DELETE FROM disttable WHERE device = 1;
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QUERY PLAN
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------------------------------------------------------------------------------------------------------------------
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Delete on public.disttable
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Delete on public.disttable
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Foreign Delete on _timescaledb_internal._dist_hyper_1_1_chunk disttable_1
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Remote SQL: DELETE FROM _timescaledb_internal._dist_hyper_1_1_chunk WHERE ctid = $1
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Foreign Delete on _timescaledb_internal._dist_hyper_1_2_chunk disttable_2
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Remote SQL: DELETE FROM _timescaledb_internal._dist_hyper_1_2_chunk WHERE ctid = $1
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Foreign Delete on _timescaledb_internal._dist_hyper_1_3_chunk disttable_3
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Remote SQL: DELETE FROM _timescaledb_internal._dist_hyper_1_3_chunk WHERE ctid = $1
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Foreign Delete on _timescaledb_internal._dist_hyper_1_4_chunk disttable_4
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Remote SQL: DELETE FROM _timescaledb_internal._dist_hyper_1_4_chunk WHERE ctid = $1
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Foreign Delete on _timescaledb_internal._dist_hyper_1_5_chunk disttable_5
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Remote SQL: DELETE FROM _timescaledb_internal._dist_hyper_1_5_chunk WHERE ctid = $1
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Foreign Delete on _timescaledb_internal._dist_hyper_1_6_chunk disttable_6
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Remote SQL: DELETE FROM _timescaledb_internal._dist_hyper_1_6_chunk WHERE ctid = $1
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-> Seq Scan on public.disttable
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Output: disttable.ctid
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Filter: (disttable.device = 1)
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-> Foreign Scan on _timescaledb_internal._dist_hyper_1_1_chunk disttable_1
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Output: disttable_1.ctid
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Data node: db_dist_hypertable_1
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Remote SQL: SELECT ctid FROM _timescaledb_internal._dist_hyper_1_1_chunk WHERE ((device = 1)) FOR UPDATE
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-> Foreign Scan on _timescaledb_internal._dist_hyper_1_2_chunk disttable_2
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Output: disttable_2.ctid
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Data node: db_dist_hypertable_3
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Remote SQL: SELECT ctid FROM _timescaledb_internal._dist_hyper_1_2_chunk WHERE ((device = 1)) FOR UPDATE
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-> Foreign Scan on _timescaledb_internal._dist_hyper_1_3_chunk disttable_3
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Output: disttable_3.ctid
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Data node: db_dist_hypertable_2
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Remote SQL: SELECT ctid FROM _timescaledb_internal._dist_hyper_1_3_chunk WHERE ((device = 1)) FOR UPDATE
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-> Foreign Scan on _timescaledb_internal._dist_hyper_1_4_chunk disttable_4
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Output: disttable_4.ctid
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Data node: db_dist_hypertable_1
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Remote SQL: SELECT ctid FROM _timescaledb_internal._dist_hyper_1_4_chunk WHERE ((device = 1)) FOR UPDATE
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-> Foreign Scan on _timescaledb_internal._dist_hyper_1_5_chunk disttable_5
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Output: disttable_5.ctid
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Data node: db_dist_hypertable_2
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Remote SQL: SELECT ctid FROM _timescaledb_internal._dist_hyper_1_5_chunk WHERE ((device = 1)) FOR UPDATE
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-> Foreign Scan on _timescaledb_internal._dist_hyper_1_6_chunk disttable_6
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Output: disttable_6.ctid
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Data node: db_dist_hypertable_3
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Remote SQL: SELECT ctid FROM _timescaledb_internal._dist_hyper_1_6_chunk WHERE ((device = 1)) FOR UPDATE
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(41 rows)
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-- Test distributed ANALYZE.
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--
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-- First show no statistics
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@ -229,6 +229,106 @@ INSERT INTO disttable VALUES
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('2018-07-01 08:01', 29, 1.5),
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('2018-07-01 09:21', 90, 2.8),
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('2018-07-01 08:21', 29, 1.2);
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-- EXPLAIN some updates/deletes to see what plans and explain output for
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-- remote operations look like
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EXPLAIN (VERBOSE, COSTS FALSE)
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UPDATE disttable SET temp = 3.7 WHERE device = 1;
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QUERY PLAN
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-----------------------------------------------------------------------------------------------------------------------------------------
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Update on public.disttable
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Update on public.disttable disttable_1
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Foreign Update on _timescaledb_internal._dist_hyper_1_1_chunk disttable_2
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Remote SQL: UPDATE _timescaledb_internal._dist_hyper_1_1_chunk SET temp = $2 WHERE ctid = $1
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Foreign Update on _timescaledb_internal._dist_hyper_1_2_chunk disttable_3
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Remote SQL: UPDATE _timescaledb_internal._dist_hyper_1_2_chunk SET temp = $2 WHERE ctid = $1
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Foreign Update on _timescaledb_internal._dist_hyper_1_3_chunk disttable_4
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Remote SQL: UPDATE _timescaledb_internal._dist_hyper_1_3_chunk SET temp = $2 WHERE ctid = $1
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Foreign Update on _timescaledb_internal._dist_hyper_1_4_chunk disttable_5
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Remote SQL: UPDATE _timescaledb_internal._dist_hyper_1_4_chunk SET temp = $2 WHERE ctid = $1
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Foreign Update on _timescaledb_internal._dist_hyper_1_5_chunk disttable_6
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Remote SQL: UPDATE _timescaledb_internal._dist_hyper_1_5_chunk SET temp = $2 WHERE ctid = $1
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Foreign Update on _timescaledb_internal._dist_hyper_1_6_chunk disttable_7
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Remote SQL: UPDATE _timescaledb_internal._dist_hyper_1_6_chunk SET temp = $2 WHERE ctid = $1
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-> Result
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Output: '3.7'::double precision, disttable.tableoid, disttable.ctid, (NULL::record)
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-> Append
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-> Seq Scan on public.disttable disttable_1
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Output: disttable_1.tableoid, disttable_1.ctid, NULL::record
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Filter: (disttable_1.device = 1)
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-> Foreign Scan on _timescaledb_internal._dist_hyper_1_1_chunk disttable_2
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Output: disttable_2.tableoid, disttable_2.ctid, disttable_2.*
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Data node: db_dist_hypertable_1
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Remote SQL: SELECT "time", device, temp, ctid FROM _timescaledb_internal._dist_hyper_1_1_chunk WHERE ((device = 1))
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-> Foreign Scan on _timescaledb_internal._dist_hyper_1_2_chunk disttable_3
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Output: disttable_3.tableoid, disttable_3.ctid, disttable_3.*
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Data node: db_dist_hypertable_3
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Remote SQL: SELECT "time", device, temp, ctid FROM _timescaledb_internal._dist_hyper_1_2_chunk WHERE ((device = 1))
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-> Foreign Scan on _timescaledb_internal._dist_hyper_1_3_chunk disttable_4
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Output: disttable_4.tableoid, disttable_4.ctid, disttable_4.*
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Data node: db_dist_hypertable_2
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Remote SQL: SELECT "time", device, temp, ctid FROM _timescaledb_internal._dist_hyper_1_3_chunk WHERE ((device = 1))
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-> Foreign Scan on _timescaledb_internal._dist_hyper_1_4_chunk disttable_5
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Output: disttable_5.tableoid, disttable_5.ctid, disttable_5.*
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Data node: db_dist_hypertable_1
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Remote SQL: SELECT "time", device, temp, ctid FROM _timescaledb_internal._dist_hyper_1_4_chunk WHERE ((device = 1))
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-> Foreign Scan on _timescaledb_internal._dist_hyper_1_5_chunk disttable_6
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Output: disttable_6.tableoid, disttable_6.ctid, disttable_6.*
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Data node: db_dist_hypertable_2
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Remote SQL: SELECT "time", device, temp, ctid FROM _timescaledb_internal._dist_hyper_1_5_chunk WHERE ((device = 1))
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-> Foreign Scan on _timescaledb_internal._dist_hyper_1_6_chunk disttable_7
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Output: disttable_7.tableoid, disttable_7.ctid, disttable_7.*
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Data node: db_dist_hypertable_3
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Remote SQL: SELECT "time", device, temp, ctid FROM _timescaledb_internal._dist_hyper_1_6_chunk WHERE ((device = 1))
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(44 rows)
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EXPLAIN (VERBOSE, COSTS FALSE)
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||||
DELETE FROM disttable WHERE device = 1;
|
||||
QUERY PLAN
|
||||
-------------------------------------------------------------------------------------------------------------
|
||||
Delete on public.disttable
|
||||
Delete on public.disttable disttable_1
|
||||
Foreign Delete on _timescaledb_internal._dist_hyper_1_1_chunk disttable_2
|
||||
Remote SQL: DELETE FROM _timescaledb_internal._dist_hyper_1_1_chunk WHERE ctid = $1
|
||||
Foreign Delete on _timescaledb_internal._dist_hyper_1_2_chunk disttable_3
|
||||
Remote SQL: DELETE FROM _timescaledb_internal._dist_hyper_1_2_chunk WHERE ctid = $1
|
||||
Foreign Delete on _timescaledb_internal._dist_hyper_1_3_chunk disttable_4
|
||||
Remote SQL: DELETE FROM _timescaledb_internal._dist_hyper_1_3_chunk WHERE ctid = $1
|
||||
Foreign Delete on _timescaledb_internal._dist_hyper_1_4_chunk disttable_5
|
||||
Remote SQL: DELETE FROM _timescaledb_internal._dist_hyper_1_4_chunk WHERE ctid = $1
|
||||
Foreign Delete on _timescaledb_internal._dist_hyper_1_5_chunk disttable_6
|
||||
Remote SQL: DELETE FROM _timescaledb_internal._dist_hyper_1_5_chunk WHERE ctid = $1
|
||||
Foreign Delete on _timescaledb_internal._dist_hyper_1_6_chunk disttable_7
|
||||
Remote SQL: DELETE FROM _timescaledb_internal._dist_hyper_1_6_chunk WHERE ctid = $1
|
||||
-> Append
|
||||
-> Seq Scan on public.disttable disttable_1
|
||||
Output: disttable_1.tableoid, disttable_1.ctid
|
||||
Filter: (disttable_1.device = 1)
|
||||
-> Foreign Scan on _timescaledb_internal._dist_hyper_1_1_chunk disttable_2
|
||||
Output: disttable_2.tableoid, disttable_2.ctid
|
||||
Data node: db_dist_hypertable_1
|
||||
Remote SQL: SELECT ctid FROM _timescaledb_internal._dist_hyper_1_1_chunk WHERE ((device = 1))
|
||||
-> Foreign Scan on _timescaledb_internal._dist_hyper_1_2_chunk disttable_3
|
||||
Output: disttable_3.tableoid, disttable_3.ctid
|
||||
Data node: db_dist_hypertable_3
|
||||
Remote SQL: SELECT ctid FROM _timescaledb_internal._dist_hyper_1_2_chunk WHERE ((device = 1))
|
||||
-> Foreign Scan on _timescaledb_internal._dist_hyper_1_3_chunk disttable_4
|
||||
Output: disttable_4.tableoid, disttable_4.ctid
|
||||
Data node: db_dist_hypertable_2
|
||||
Remote SQL: SELECT ctid FROM _timescaledb_internal._dist_hyper_1_3_chunk WHERE ((device = 1))
|
||||
-> Foreign Scan on _timescaledb_internal._dist_hyper_1_4_chunk disttable_5
|
||||
Output: disttable_5.tableoid, disttable_5.ctid
|
||||
Data node: db_dist_hypertable_1
|
||||
Remote SQL: SELECT ctid FROM _timescaledb_internal._dist_hyper_1_4_chunk WHERE ((device = 1))
|
||||
-> Foreign Scan on _timescaledb_internal._dist_hyper_1_5_chunk disttable_6
|
||||
Output: disttable_6.tableoid, disttable_6.ctid
|
||||
Data node: db_dist_hypertable_2
|
||||
Remote SQL: SELECT ctid FROM _timescaledb_internal._dist_hyper_1_5_chunk WHERE ((device = 1))
|
||||
-> Foreign Scan on _timescaledb_internal._dist_hyper_1_6_chunk disttable_7
|
||||
Output: disttable_7.tableoid, disttable_7.ctid
|
||||
Data node: db_dist_hypertable_3
|
||||
Remote SQL: SELECT ctid FROM _timescaledb_internal._dist_hyper_1_6_chunk WHERE ((device = 1))
|
||||
(42 rows)
|
||||
|
||||
-- Test distributed ANALYZE.
|
||||
--
|
||||
-- First show no statistics
|
||||
|
||||
@ -169,6 +169,14 @@ INSERT INTO disttable VALUES
|
||||
('2018-07-01 09:21', 90, 2.8),
|
||||
('2018-07-01 08:21', 29, 1.2);
|
||||
|
||||
-- EXPLAIN some updates/deletes to see what plans and explain output for
|
||||
-- remote operations look like
|
||||
EXPLAIN (VERBOSE, COSTS FALSE)
|
||||
UPDATE disttable SET temp = 3.7 WHERE device = 1;
|
||||
|
||||
EXPLAIN (VERBOSE, COSTS FALSE)
|
||||
DELETE FROM disttable WHERE device = 1;
|
||||
|
||||
-- Test distributed ANALYZE.
|
||||
--
|
||||
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user