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[fix](regression) Stabilize sync MV selection in MTMV test #65485

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[fix](regression) Stabilize sync MV selection in MTMV test #65485

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b9912c9
[fix](regression) Stabilize sync MV selection in MTMV test
shuke987 Jul 12, 2026
d50254d
test(regression): verify MTMV rewrite cache
shuke987 Jul 15, 2026
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15 changes: 12 additions & 3 deletions regression-test/suites/rollup_p0/test_create_mv_and_mtmv.groovy
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Original file line number Diff line number Diff line change
Expand Up @@ -52,9 +52,10 @@ suite("test_create_mv_and_mtmv") {
dt;

""")
// The MTMV must read the sync MV to cover partition-column resolution through the rollup.
explain {
sql("""
SELECT dt,advertiser,
SELECT /*+ use_mv(${tableName}.${mvName}) */ dt,advertiser,
count(DISTINCT user_id)
FROM ${tableName}
GROUP BY dt,advertiser""")
Expand All @@ -68,7 +69,7 @@ suite("test_create_mv_and_mtmv") {
DISTRIBUTED BY RANDOM BUCKETS 1
PROPERTIES ('replication_num' = '1')
AS
select dt, advertiser, count(distinct user_id)
select /*+ use_mv(${tableName}.${mvName}) */ dt, advertiser, count(distinct user_id)
from ${tableName}
group by dt, advertiser;
"""
Expand All @@ -94,6 +95,14 @@ AND RefreshMode = '${refreshMode}';"""
wait_mtmv_refresh_finish("COMPLETE")
qt_mtmv_init """ SELECT * FROM ${mtmvName} ORDER BY dt, advertiser"""

// Verify that the MTMV definition can build a rewrite cache and produce a rewrite candidate.
// The final CBO choice is intentionally not asserted because either valid plan may be cheaper.
mv_rewrite_success_without_check_chosen("""
SELECT dt, advertiser, count(distinct user_id)
FROM ${tableName}
GROUP BY dt, advertiser
""", mtmvName)

sql """INSERT INTO ${tableName} VALUES("2024-07-03",'b', "2024-07-03", 'b',2);"""
refreshTime = (int) (System.currentTimeMillis() / 1000L)
sql """REFRESH MATERIALIZED VIEW ${mtmvName} AUTO;"""
Expand All @@ -109,4 +118,4 @@ AND RefreshMode = '${refreshMode}';"""
sql """ DROP TABLE IF EXISTS ${tableName} """
sql """ DROP MATERIALIZED VIEW IF EXISTS ${mtmvName} """

}
}
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