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branch-2.1: [fix](local shuffle) Set serial execution for schema scan operator #47498 #47527

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branch-2.1: [fix](local shuffle) Set serial execution for schema scan operator #47498 #47527

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4 changes: 3 additions & 1 deletion be/src/pipeline/exec/schema_scan_operator.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -83,7 +83,9 @@ SchemaScanOperatorX::SchemaScanOperatorX(ObjectPool* pool, const TPlanNode& tnod
_common_scanner_param(new SchemaScannerCommonParam()),
_tuple_id(tnode.schema_scan_node.tuple_id),
_tuple_idx(0),
_slot_num(0) {}
_slot_num(0) {
Base::_is_serial_operator = tnode.__isset.is_serial_operator && tnode.is_serial_operator;
}

Status SchemaScanOperatorX::init(const TPlanNode& tnode, RuntimeState* state) {
RETURN_IF_ERROR(Base::init(tnode, state));
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8 changes: 8 additions & 0 deletions regression-test/suites/query_p0/system/test_query_sys.groovy
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Expand Up @@ -53,4 +53,12 @@ suite("test_query_sys", "query,p0") {
sql "select * from http_stream('format'='csv');"
exception "No Alive backends"
}

// `workload_group_resource_usage` will be refresh 30s after BE startup so sleep 30s to get a stable result
sleep(30000)
sql """set parallel_pipeline_task_num=8"""
def rows1 = sql """ select count(*) from information_schema.workload_group_resource_usage; """
sql """set parallel_pipeline_task_num=1"""
def rows2 = sql """ select count(*) from information_schema.workload_group_resource_usage; """
assertEquals(rows1, rows2)
}
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