mirror of https://github.com/citusdata/citus.git
multi_null_minmax_value_pruning: no versioning & coordinator_plan
Philip Dubé
parent
871dabdc63
commit
a523a5b773
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@ -3,14 +3,6 @@
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--
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-- This test checks that we can handle null min/max values in shard statistics
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-- and that we don't partition or join prune shards that have null values.
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-- print major version number for version-specific tests
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SHOW server_version \gset
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SELECT substring(:'server_version', '\d+')::int > 10 AS server_version_above_ten;
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server_version_above_ten
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--------------------------
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t
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(1 row)
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SET client_min_messages TO DEBUG2;
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SET citus.explain_all_tasks TO on;
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-- to avoid differing explain output - executor doesn't matter,
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@ -33,34 +25,19 @@ SELECT shardminvalue, shardmaxvalue from pg_dist_shard WHERE shardid = 290001;
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-- Check that partition and join pruning works when min/max values exist
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-- Adding l_orderkey = 1 to make the query not router executable
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SELECT coordinator_plan($Q$
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EXPLAIN (COSTS FALSE)
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SELECT l_orderkey, l_linenumber, l_shipdate FROM lineitem WHERE l_orderkey = 9030 or l_orderkey = 1;
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$Q$);
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DEBUG: Router planner does not support append-partitioned tables.
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CONTEXT: PL/pgSQL function coordinator_plan(text) line 3 at FOR over EXECUTE statement
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LOG: join order: [ "lineitem" ]
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QUERY PLAN
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-----------------------------------------------------------------------
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CONTEXT: PL/pgSQL function coordinator_plan(text) line 3 at FOR over EXECUTE statement
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coordinator_plan
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------------------------------
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Custom Scan (Citus Adaptive)
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Task Count: 2
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Tasks Shown: All
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-> Task
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Node: host=localhost port=57637 dbname=regression
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-> Bitmap Heap Scan on lineitem_290001 lineitem
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Recheck Cond: ((l_orderkey = 9030) OR (l_orderkey = 1))
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-> BitmapOr
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-> Bitmap Index Scan on lineitem_pkey_290001
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Index Cond: (l_orderkey = 9030)
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-> Bitmap Index Scan on lineitem_pkey_290001
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Index Cond: (l_orderkey = 1)
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-> Task
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Node: host=localhost port=57638 dbname=regression
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-> Bitmap Heap Scan on lineitem_290000 lineitem
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Recheck Cond: ((l_orderkey = 9030) OR (l_orderkey = 1))
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-> BitmapOr
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-> Bitmap Index Scan on lineitem_pkey_290000
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Index Cond: (l_orderkey = 9030)
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-> Bitmap Index Scan on lineitem_pkey_290000
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Index Cond: (l_orderkey = 1)
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(21 rows)
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(2 rows)
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EXPLAIN (COSTS FALSE)
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SELECT sum(l_linenumber), avg(l_linenumber) FROM lineitem, orders
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@ -97,24 +74,19 @@ DEBUG: join prunable for intervals [8997,14947] and [1,5986]
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-- partition or join pruning for the shard with null min value. Since it is not
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-- supported with single-repartition join, dual-repartition has been used.
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UPDATE pg_dist_shard SET shardminvalue = NULL WHERE shardid = 290000;
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SELECT coordinator_plan($Q$
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EXPLAIN (COSTS FALSE)
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SELECT l_orderkey, l_linenumber, l_shipdate FROM lineitem WHERE l_orderkey = 9030;
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$Q$);
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DEBUG: Router planner does not support append-partitioned tables.
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CONTEXT: PL/pgSQL function coordinator_plan(text) line 3 at FOR over EXECUTE statement
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LOG: join order: [ "lineitem" ]
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QUERY PLAN
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-------------------------------------------------------------------------------
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CONTEXT: PL/pgSQL function coordinator_plan(text) line 3 at FOR over EXECUTE statement
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coordinator_plan
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------------------------------
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Custom Scan (Citus Adaptive)
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Task Count: 2
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Tasks Shown: All
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-> Task
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Node: host=localhost port=57637 dbname=regression
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-> Index Scan using lineitem_pkey_290001 on lineitem_290001 lineitem
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Index Cond: (l_orderkey = 9030)
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-> Task
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Node: host=localhost port=57638 dbname=regression
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-> Index Scan using lineitem_pkey_290000 on lineitem_290000 lineitem
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Index Cond: (l_orderkey = 9030)
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(11 rows)
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(2 rows)
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EXPLAIN (COSTS FALSE)
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SELECT sum(l_linenumber), avg(l_linenumber) FROM lineitem, orders
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@ -169,24 +141,19 @@ HINT: Since you enabled citus.enable_repartition_joins Citus chose to use task-
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-- don't apply partition or join pruning for this other shard either. Since it
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-- is not supported with single-repartition join, dual-repartition has been used.
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UPDATE pg_dist_shard SET shardmaxvalue = NULL WHERE shardid = 290001;
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SELECT coordinator_plan($Q$
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EXPLAIN (COSTS FALSE)
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SELECT l_orderkey, l_linenumber, l_shipdate FROM lineitem WHERE l_orderkey = 9030;
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$Q$);
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DEBUG: Router planner does not support append-partitioned tables.
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CONTEXT: PL/pgSQL function coordinator_plan(text) line 3 at FOR over EXECUTE statement
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LOG: join order: [ "lineitem" ]
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QUERY PLAN
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-------------------------------------------------------------------------------
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CONTEXT: PL/pgSQL function coordinator_plan(text) line 3 at FOR over EXECUTE statement
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coordinator_plan
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------------------------------
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Custom Scan (Citus Adaptive)
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Task Count: 2
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Tasks Shown: All
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-> Task
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Node: host=localhost port=57637 dbname=regression
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-> Index Scan using lineitem_pkey_290001 on lineitem_290001 lineitem
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Index Cond: (l_orderkey = 9030)
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-> Task
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Node: host=localhost port=57638 dbname=regression
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-> Index Scan using lineitem_pkey_290000 on lineitem_290000 lineitem
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Index Cond: (l_orderkey = 9030)
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(11 rows)
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(2 rows)
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EXPLAIN (COSTS FALSE)
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SELECT sum(l_linenumber), avg(l_linenumber) FROM lineitem, orders
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@ -241,21 +208,21 @@ HINT: Since you enabled citus.enable_repartition_joins Citus chose to use task-
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-- should apply partition and join pruning for this shard now. Since it is not
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-- supported with single-repartition join, dual-repartition has been used.
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UPDATE pg_dist_shard SET shardminvalue = '0' WHERE shardid = 290000;
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SELECT coordinator_plan($Q$
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EXPLAIN (COSTS FALSE)
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SELECT l_orderkey, l_linenumber, l_shipdate FROM lineitem WHERE l_orderkey = 9030;
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$Q$);
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DEBUG: Router planner does not support append-partitioned tables.
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CONTEXT: PL/pgSQL function coordinator_plan(text) line 3 at FOR over EXECUTE statement
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LOG: join order: [ "lineitem" ]
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CONTEXT: PL/pgSQL function coordinator_plan(text) line 3 at FOR over EXECUTE statement
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DEBUG: Plan is router executable
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QUERY PLAN
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-------------------------------------------------------------------------------
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CONTEXT: PL/pgSQL function coordinator_plan(text) line 3 at FOR over EXECUTE statement
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coordinator_plan
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------------------------------
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Custom Scan (Citus Adaptive)
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Task Count: 1
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Tasks Shown: All
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-> Task
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Node: host=localhost port=57637 dbname=regression
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-> Index Scan using lineitem_pkey_290001 on lineitem_290001 lineitem
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Index Cond: (l_orderkey = 9030)
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(7 rows)
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(2 rows)
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EXPLAIN (COSTS FALSE)
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SELECT sum(l_linenumber), avg(l_linenumber) FROM lineitem, orders
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@ -1,312 +0,0 @@
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--
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-- MULTI_NULL_MINMAX_VALUE_PRUNING
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--
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-- This test checks that we can handle null min/max values in shard statistics
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-- and that we don't partition or join prune shards that have null values.
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-- print major version number for version-specific tests
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SHOW server_version \gset
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SELECT substring(:'server_version', '\d+')::int > 10 AS server_version_above_ten;
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server_version_above_ten
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--------------------------
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f
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(1 row)
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SET client_min_messages TO DEBUG2;
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SET citus.explain_all_tasks TO on;
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-- to avoid differing explain output - executor doesn't matter,
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-- because were testing pruning here.
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RESET citus.task_executor_type;
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-- Change configuration to treat lineitem and orders tables as large
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SET citus.log_multi_join_order to true;
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SET citus.enable_repartition_joins to ON;
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SELECT shardminvalue, shardmaxvalue from pg_dist_shard WHERE shardid = 290000;
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shardminvalue | shardmaxvalue
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---------------+---------------
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1 | 5986
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(1 row)
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SELECT shardminvalue, shardmaxvalue from pg_dist_shard WHERE shardid = 290001;
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shardminvalue | shardmaxvalue
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---------------+---------------
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8997 | 14947
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(1 row)
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-- Check that partition and join pruning works when min/max values exist
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-- Adding l_orderkey = 1 to make the query not router executable
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EXPLAIN (COSTS FALSE)
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SELECT l_orderkey, l_linenumber, l_shipdate FROM lineitem WHERE l_orderkey = 9030 or l_orderkey = 1;
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DEBUG: Router planner does not support append-partitioned tables.
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LOG: join order: [ "lineitem" ]
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QUERY PLAN
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-----------------------------------------------------------------------
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Custom Scan (Citus Adaptive)
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Task Count: 2
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Tasks Shown: All
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-> Task
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Node: host=localhost port=57637 dbname=regression
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-> Bitmap Heap Scan on lineitem_290001 lineitem
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Recheck Cond: ((l_orderkey = 9030) OR (l_orderkey = 1))
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-> BitmapOr
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-> Bitmap Index Scan on lineitem_pkey_290001
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Index Cond: (l_orderkey = 9030)
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-> Bitmap Index Scan on lineitem_pkey_290001
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Index Cond: (l_orderkey = 1)
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-> Task
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Node: host=localhost port=57638 dbname=regression
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-> Bitmap Heap Scan on lineitem_290000 lineitem
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Recheck Cond: ((l_orderkey = 9030) OR (l_orderkey = 1))
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-> BitmapOr
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-> Bitmap Index Scan on lineitem_pkey_290000
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Index Cond: (l_orderkey = 9030)
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-> Bitmap Index Scan on lineitem_pkey_290000
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Index Cond: (l_orderkey = 1)
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(21 rows)
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EXPLAIN (COSTS FALSE)
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SELECT sum(l_linenumber), avg(l_linenumber) FROM lineitem, orders
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WHERE l_orderkey = o_orderkey;
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DEBUG: Router planner does not support append-partitioned tables.
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LOG: join order: [ "lineitem" ][ local partition join "orders" ]
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DEBUG: join prunable for intervals [1,5986] and [8997,14947]
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DEBUG: join prunable for intervals [8997,14947] and [1,5986]
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QUERY PLAN
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--------------------------------------------------------------------------------
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Aggregate
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-> Custom Scan (Citus Adaptive)
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Task Count: 2
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Tasks Shown: All
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-> Task
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Node: host=localhost port=57638 dbname=regression
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-> Aggregate
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-> Hash Join
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Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
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-> Seq Scan on lineitem_290000 lineitem
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-> Hash
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-> Seq Scan on orders_290002 orders
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-> Task
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Node: host=localhost port=57637 dbname=regression
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-> Aggregate
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-> Hash Join
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Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
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-> Seq Scan on lineitem_290001 lineitem
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-> Hash
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-> Seq Scan on orders_290003 orders
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(20 rows)
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-- Now set the minimum value for a shard to null. Then check that we don't apply
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-- partition or join pruning for the shard with null min value. Since it is not
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-- supported with single-repartition join, dual-repartition has been used.
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UPDATE pg_dist_shard SET shardminvalue = NULL WHERE shardid = 290000;
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EXPLAIN (COSTS FALSE)
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SELECT l_orderkey, l_linenumber, l_shipdate FROM lineitem WHERE l_orderkey = 9030;
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DEBUG: Router planner does not support append-partitioned tables.
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LOG: join order: [ "lineitem" ]
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QUERY PLAN
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-------------------------------------------------------------------------------
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Custom Scan (Citus Adaptive)
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Task Count: 2
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Tasks Shown: All
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-> Task
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Node: host=localhost port=57637 dbname=regression
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-> Index Scan using lineitem_pkey_290001 on lineitem_290001 lineitem
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Index Cond: (l_orderkey = 9030)
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-> Task
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Node: host=localhost port=57638 dbname=regression
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-> Index Scan using lineitem_pkey_290000 on lineitem_290000 lineitem
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Index Cond: (l_orderkey = 9030)
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(11 rows)
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EXPLAIN (COSTS FALSE)
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SELECT sum(l_linenumber), avg(l_linenumber) FROM lineitem, orders
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WHERE l_partkey = o_custkey;
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DEBUG: Router planner does not support append-partitioned tables.
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LOG: join order: [ "lineitem" ][ dual partition join "orders" ]
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DEBUG: join prunable for task partitionId 0 and 1
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DEBUG: join prunable for task partitionId 0 and 2
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DEBUG: join prunable for task partitionId 0 and 3
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DEBUG: join prunable for task partitionId 1 and 0
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DEBUG: join prunable for task partitionId 1 and 2
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DEBUG: join prunable for task partitionId 1 and 3
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DEBUG: join prunable for task partitionId 2 and 0
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DEBUG: join prunable for task partitionId 2 and 1
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DEBUG: join prunable for task partitionId 2 and 3
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DEBUG: join prunable for task partitionId 3 and 0
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DEBUG: join prunable for task partitionId 3 and 1
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DEBUG: join prunable for task partitionId 3 and 2
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DEBUG: pruning merge fetch taskId 1
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DETAIL: Creating dependency on merge taskId 3
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DEBUG: pruning merge fetch taskId 2
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DETAIL: Creating dependency on merge taskId 3
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DEBUG: pruning merge fetch taskId 4
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DETAIL: Creating dependency on merge taskId 6
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DEBUG: pruning merge fetch taskId 5
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DETAIL: Creating dependency on merge taskId 6
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DEBUG: pruning merge fetch taskId 7
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DETAIL: Creating dependency on merge taskId 9
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DEBUG: pruning merge fetch taskId 8
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DETAIL: Creating dependency on merge taskId 9
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DEBUG: pruning merge fetch taskId 10
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DETAIL: Creating dependency on merge taskId 12
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DEBUG: pruning merge fetch taskId 11
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DETAIL: Creating dependency on merge taskId 12
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DEBUG: cannot use real time executor with repartition jobs
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HINT: Since you enabled citus.enable_repartition_joins Citus chose to use task-tracker.
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QUERY PLAN
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-------------------------------------------------------------------
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Aggregate
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-> Custom Scan (Citus Task-Tracker)
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Task Count: 4
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Tasks Shown: None, not supported for re-partition queries
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-> MapMergeJob
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Map Task Count: 2
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Merge Task Count: 4
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-> MapMergeJob
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Map Task Count: 2
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Merge Task Count: 4
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(10 rows)
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-- Next, set the maximum value for another shard to null. Then check that we
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-- don't apply partition or join pruning for this other shard either. Since it
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-- is not supported with single-repartition join, dual-repartition has been used.
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UPDATE pg_dist_shard SET shardmaxvalue = NULL WHERE shardid = 290001;
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EXPLAIN (COSTS FALSE)
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SELECT l_orderkey, l_linenumber, l_shipdate FROM lineitem WHERE l_orderkey = 9030;
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DEBUG: Router planner does not support append-partitioned tables.
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LOG: join order: [ "lineitem" ]
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QUERY PLAN
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-------------------------------------------------------------------------------
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Custom Scan (Citus Adaptive)
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Task Count: 2
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Tasks Shown: All
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-> Task
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Node: host=localhost port=57638 dbname=regression
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-> Index Scan using lineitem_pkey_290000 on lineitem_290000 lineitem
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Index Cond: (l_orderkey = 9030)
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-> Task
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Node: host=localhost port=57637 dbname=regression
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-> Index Scan using lineitem_pkey_290001 on lineitem_290001 lineitem
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Index Cond: (l_orderkey = 9030)
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(11 rows)
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EXPLAIN (COSTS FALSE)
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SELECT sum(l_linenumber), avg(l_linenumber) FROM lineitem, orders
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WHERE l_partkey = o_custkey;
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DEBUG: Router planner does not support append-partitioned tables.
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LOG: join order: [ "lineitem" ][ dual partition join "orders" ]
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DEBUG: join prunable for task partitionId 0 and 1
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DEBUG: join prunable for task partitionId 0 and 2
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DEBUG: join prunable for task partitionId 0 and 3
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DEBUG: join prunable for task partitionId 1 and 0
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DEBUG: join prunable for task partitionId 1 and 2
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DEBUG: join prunable for task partitionId 1 and 3
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DEBUG: join prunable for task partitionId 2 and 0
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DEBUG: join prunable for task partitionId 2 and 1
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DEBUG: join prunable for task partitionId 2 and 3
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DEBUG: join prunable for task partitionId 3 and 0
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DEBUG: join prunable for task partitionId 3 and 1
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DEBUG: join prunable for task partitionId 3 and 2
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DEBUG: pruning merge fetch taskId 1
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DETAIL: Creating dependency on merge taskId 3
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DEBUG: pruning merge fetch taskId 2
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DETAIL: Creating dependency on merge taskId 3
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DEBUG: pruning merge fetch taskId 4
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DETAIL: Creating dependency on merge taskId 6
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DEBUG: pruning merge fetch taskId 5
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DETAIL: Creating dependency on merge taskId 6
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DEBUG: pruning merge fetch taskId 7
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DETAIL: Creating dependency on merge taskId 9
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DEBUG: pruning merge fetch taskId 8
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DETAIL: Creating dependency on merge taskId 9
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DEBUG: pruning merge fetch taskId 10
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DETAIL: Creating dependency on merge taskId 12
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DEBUG: pruning merge fetch taskId 11
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DETAIL: Creating dependency on merge taskId 12
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DEBUG: cannot use real time executor with repartition jobs
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HINT: Since you enabled citus.enable_repartition_joins Citus chose to use task-tracker.
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QUERY PLAN
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-------------------------------------------------------------------
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Aggregate
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-> Custom Scan (Citus Task-Tracker)
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Task Count: 4
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Tasks Shown: None, not supported for re-partition queries
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-> MapMergeJob
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Map Task Count: 2
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Merge Task Count: 4
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-> MapMergeJob
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Map Task Count: 2
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Merge Task Count: 4
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(10 rows)
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-- Last, set the minimum value to 0 and check that we don't treat it as null. We
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-- should apply partition and join pruning for this shard now. Since it is not
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-- supported with single-repartition join, dual-repartition has been used.
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UPDATE pg_dist_shard SET shardminvalue = '0' WHERE shardid = 290000;
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EXPLAIN (COSTS FALSE)
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SELECT l_orderkey, l_linenumber, l_shipdate FROM lineitem WHERE l_orderkey = 9030;
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DEBUG: Router planner does not support append-partitioned tables.
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LOG: join order: [ "lineitem" ]
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DEBUG: Plan is router executable
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QUERY PLAN
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-------------------------------------------------------------------------------
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Custom Scan (Citus Adaptive)
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Task Count: 1
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Tasks Shown: All
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-> Task
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Node: host=localhost port=57637 dbname=regression
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-> Index Scan using lineitem_pkey_290001 on lineitem_290001 lineitem
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Index Cond: (l_orderkey = 9030)
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(7 rows)
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EXPLAIN (COSTS FALSE)
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SELECT sum(l_linenumber), avg(l_linenumber) FROM lineitem, orders
|
||||
WHERE l_partkey = o_custkey;
|
||||
DEBUG: Router planner does not support append-partitioned tables.
|
||||
LOG: join order: [ "lineitem" ][ dual partition join "orders" ]
|
||||
DEBUG: join prunable for task partitionId 0 and 1
|
||||
DEBUG: join prunable for task partitionId 0 and 2
|
||||
DEBUG: join prunable for task partitionId 0 and 3
|
||||
DEBUG: join prunable for task partitionId 1 and 0
|
||||
DEBUG: join prunable for task partitionId 1 and 2
|
||||
DEBUG: join prunable for task partitionId 1 and 3
|
||||
DEBUG: join prunable for task partitionId 2 and 0
|
||||
DEBUG: join prunable for task partitionId 2 and 1
|
||||
DEBUG: join prunable for task partitionId 2 and 3
|
||||
DEBUG: join prunable for task partitionId 3 and 0
|
||||
DEBUG: join prunable for task partitionId 3 and 1
|
||||
DEBUG: join prunable for task partitionId 3 and 2
|
||||
DEBUG: pruning merge fetch taskId 1
|
||||
DETAIL: Creating dependency on merge taskId 3
|
||||
DEBUG: pruning merge fetch taskId 2
|
||||
DETAIL: Creating dependency on merge taskId 3
|
||||
DEBUG: pruning merge fetch taskId 4
|
||||
DETAIL: Creating dependency on merge taskId 6
|
||||
DEBUG: pruning merge fetch taskId 5
|
||||
DETAIL: Creating dependency on merge taskId 6
|
||||
DEBUG: pruning merge fetch taskId 7
|
||||
DETAIL: Creating dependency on merge taskId 9
|
||||
DEBUG: pruning merge fetch taskId 8
|
||||
DETAIL: Creating dependency on merge taskId 9
|
||||
DEBUG: pruning merge fetch taskId 10
|
||||
DETAIL: Creating dependency on merge taskId 12
|
||||
DEBUG: pruning merge fetch taskId 11
|
||||
DETAIL: Creating dependency on merge taskId 12
|
||||
DEBUG: cannot use real time executor with repartition jobs
|
||||
HINT: Since you enabled citus.enable_repartition_joins Citus chose to use task-tracker.
|
||||
QUERY PLAN
|
||||
-------------------------------------------------------------------
|
||||
Aggregate
|
||||
-> Custom Scan (Citus Task-Tracker)
|
||||
Task Count: 4
|
||||
Tasks Shown: None, not supported for re-partition queries
|
||||
-> MapMergeJob
|
||||
Map Task Count: 2
|
||||
Merge Task Count: 4
|
||||
-> MapMergeJob
|
||||
Map Task Count: 2
|
||||
Merge Task Count: 4
|
||||
(10 rows)
|
||||
|
||||
-- Set minimum and maximum values for two shards back to their original values
|
||||
UPDATE pg_dist_shard SET shardminvalue = '1' WHERE shardid = 290000;
|
||||
UPDATE pg_dist_shard SET shardmaxvalue = '14947' WHERE shardid = 290001;
|
||||
SET client_min_messages TO NOTICE;
|
||||
|
|
@ -6,10 +6,6 @@
|
|||
-- and that we don't partition or join prune shards that have null values.
|
||||
|
||||
|
||||
-- print major version number for version-specific tests
|
||||
SHOW server_version \gset
|
||||
SELECT substring(:'server_version', '\d+')::int > 10 AS server_version_above_ten;
|
||||
|
||||
SET client_min_messages TO DEBUG2;
|
||||
SET citus.explain_all_tasks TO on;
|
||||
-- to avoid differing explain output - executor doesn't matter,
|
||||
|
|
@ -26,8 +22,10 @@ SELECT shardminvalue, shardmaxvalue from pg_dist_shard WHERE shardid = 290001;
|
|||
|
||||
-- Check that partition and join pruning works when min/max values exist
|
||||
-- Adding l_orderkey = 1 to make the query not router executable
|
||||
SELECT coordinator_plan($Q$
|
||||
EXPLAIN (COSTS FALSE)
|
||||
SELECT l_orderkey, l_linenumber, l_shipdate FROM lineitem WHERE l_orderkey = 9030 or l_orderkey = 1;
|
||||
$Q$);
|
||||
|
||||
EXPLAIN (COSTS FALSE)
|
||||
SELECT sum(l_linenumber), avg(l_linenumber) FROM lineitem, orders
|
||||
|
|
@ -39,8 +37,10 @@ SELECT sum(l_linenumber), avg(l_linenumber) FROM lineitem, orders
|
|||
|
||||
UPDATE pg_dist_shard SET shardminvalue = NULL WHERE shardid = 290000;
|
||||
|
||||
SELECT coordinator_plan($Q$
|
||||
EXPLAIN (COSTS FALSE)
|
||||
SELECT l_orderkey, l_linenumber, l_shipdate FROM lineitem WHERE l_orderkey = 9030;
|
||||
$Q$);
|
||||
|
||||
EXPLAIN (COSTS FALSE)
|
||||
SELECT sum(l_linenumber), avg(l_linenumber) FROM lineitem, orders
|
||||
|
|
@ -52,8 +52,10 @@ SELECT sum(l_linenumber), avg(l_linenumber) FROM lineitem, orders
|
|||
|
||||
UPDATE pg_dist_shard SET shardmaxvalue = NULL WHERE shardid = 290001;
|
||||
|
||||
SELECT coordinator_plan($Q$
|
||||
EXPLAIN (COSTS FALSE)
|
||||
SELECT l_orderkey, l_linenumber, l_shipdate FROM lineitem WHERE l_orderkey = 9030;
|
||||
$Q$);
|
||||
|
||||
EXPLAIN (COSTS FALSE)
|
||||
SELECT sum(l_linenumber), avg(l_linenumber) FROM lineitem, orders
|
||||
|
|
@ -65,8 +67,10 @@ SELECT sum(l_linenumber), avg(l_linenumber) FROM lineitem, orders
|
|||
|
||||
UPDATE pg_dist_shard SET shardminvalue = '0' WHERE shardid = 290000;
|
||||
|
||||
SELECT coordinator_plan($Q$
|
||||
EXPLAIN (COSTS FALSE)
|
||||
SELECT l_orderkey, l_linenumber, l_shipdate FROM lineitem WHERE l_orderkey = 9030;
|
||||
$Q$);
|
||||
|
||||
EXPLAIN (COSTS FALSE)
|
||||
SELECT sum(l_linenumber), avg(l_linenumber) FROM lineitem, orders
|
||||
|
|
|
|||
Loading…
Reference in New Issue