[fix](mv) Fix sync mv could not be chosen by cbo stable because stats upload from be not in time

fe/fe-core/src/main/java/org/apache/doris/nereids/stats/StatsCalculator.java

@@ -543,6 +543,12 @@ public Statistics computeOlapScan(OlapScan olapScan) {
                     optStats.isPresent(), tableRowCount, olapTable.getQualifiedName());
             if (optStats.isPresent()) {
                 double selectedPartitionsRowCount = getSelectedPartitionRowCount(olapScan, tableRowCount);
+                if (isRegisteredRowCount(olapScan)) {
+                    // If a row count is injected for the materialized view, use it to fix the issue where
+                    // the materialized view cannot be selected by cbo stable due to selectedPartitionsRowCount being 0,
+                    // which is caused by delayed statistics reporting.
+                    selectedPartitionsRowCount = tableRowCount;
+                }
                 LOG.info("computeOlapScan optStats is {}, selectedPartitionsRowCount is {}", optStats.get(),
                         selectedPartitionsRowCount);
                 // if estimated mv rowCount is more than actual row count, fall back to base table stats

fe/fe-core/src/main/java/org/apache/doris/qe/SessionVariable.java

@@ -34,7 +34,6 @@
 import org.apache.doris.nereids.metrics.EventSwitchParser;
 import org.apache.doris.nereids.parser.Dialect;
 import org.apache.doris.nereids.rules.RuleType;
-import org.apache.doris.nereids.rules.exploration.mv.PreMaterializedViewRewriter.PreRewriteStrategy;
 import org.apache.doris.nereids.rules.expression.ExpressionRuleType;
 import org.apache.doris.planner.GroupCommitBlockSink;
 import org.apache.doris.qe.VariableMgr.VarAttr;
@@ -3289,20 +3288,6 @@ public void initFuzzyModeVariables() {
             this.enableReserveMemory = randomInt % 5 != 0;
         }
 
-        // random pre materialized view rewrite strategy
-        randomInt = random.nextInt(3);
-        switch (randomInt % 3) {
-            case 0:
-                this.preMaterializedViewRewriteStrategy = PreRewriteStrategy.NOT_IN_RBO.name();
-                break;
-            case 1:
-                this.preMaterializedViewRewriteStrategy = PreRewriteStrategy.TRY_IN_RBO.name();
-                break;
-            case 2:
-            default:
-                this.preMaterializedViewRewriteStrategy = PreRewriteStrategy.FORCE_IN_RBO.name();
-                break;
-        }
         setFuzzyForCatalog(random);
     }
 

regression-test/suites/mv_p0/ssb/multiple_no_where/multiple_no_where.groovy

@@ -107,6 +107,8 @@ suite ("multiple_no_where") {
     qt_select_star "select * from lineorder_flat order by 1,2, P_MFGR;"
 
     sql """analyze table lineorder_flat with sync;"""
+    sql """alter table lineorder_flat modify column C_CITY set stats ('row_count'='7');"""
+    sql """alter table lineorder_flat modify column a3 set stats ('row_count'='1');"""
     sql """set enable_stats=false;"""
 
     mv_rewrite_success("""SELECT SUM(LO_EXTENDEDPRICE * LO_DISCOUNT) AS revenue

regression-test/suites/mv_p0/ssb/multiple_ssb/multiple_ssb.groovy

@@ -154,6 +154,10 @@ suite ("multiple_ssb") {
 
     sql """analyze table lineorder_flat with sync;"""
     sql """alter table lineorder_flat modify column LO_ORDERDATE set stats ('row_count'='8');"""
+    sql """alter table lineorder_flat modify column a1 set stats ('row_count'='1');"""
+    sql """alter table lineorder_flat modify column a4 set stats ('row_count'='1');"""
+    sql """alter table lineorder_flat modify column a6 set stats ('row_count'='1');"""
+    sql """alter table lineorder_flat modify column x2 set stats ('row_count'='1');"""
     sql """set enable_stats=false;"""
 
     mv_rewrite_success("""SELECT SUM(LO_EXTENDEDPRICE * LO_DISCOUNT) AS revenue

regression-test/suites/mv_p0/ssb/multiple_ssb_between/multiple_ssb_between.groovy

@@ -153,7 +153,11 @@ suite ("multiple_ssb_between") {
     sql """set enable_stats=true;"""
 
     sql """alter table lineorder_flat modify column LO_ORDERDATE set stats ('row_count'='8');"""
-
+    sql """alter table lineorder_flat modify column a1 set stats ('row_count'='1');"""
+    sql """alter table lineorder_flat modify column a4 set stats ('row_count'='1');"""
+    sql """alter table lineorder_flat modify column a6 set stats ('row_count'='1');"""
+    sql """alter table lineorder_flat modify column x2 set stats ('row_count'='1');"""
+
     mv_rewrite_success("""SELECT SUM(LO_EXTENDEDPRICE * LO_DISCOUNT) AS revenue
                 FROM lineorder_flat
                 WHERE

regression-test/suites/mv_p0/ssb/q_1_1/q_1_1.groovy

@@ -102,6 +102,7 @@ suite ("mv_ssb_q_1_1") {
 
     sql "analyze table lineorder_flat with sync;"
     sql """alter table lineorder_flat modify column C_CITY set stats ('row_count'='6');"""
+    sql """alter table lineorder_flat modify column a1 set stats ('row_count'='1');"""
     mv_rewrite_success("""SELECT SUM(LO_EXTENDEDPRICE * LO_DISCOUNT) AS revenue
                 FROM lineorder_flat
                 WHERE

regression-test/suites/mv_p0/ssb/q_2_1/q_2_1.groovy

@@ -94,6 +94,7 @@ suite ("mv_ssb_q_2_1") {
     qt_select_star "select * from lineorder_flat order by 1,2,P_MFGR;"
 
   sql """alter table lineorder_flat modify column LO_ORDERDATE set stats ('row_count'='2');"""
+  sql """alter table lineorder_flat modify column a2 set stats ('row_count'='1');"""
 
     mv_rewrite_success("""SELECT
                 SUM(LO_REVENUE), (LO_ORDERDATE DIV 10000) AS YEAR,

regression-test/suites/mv_p0/ssb/q_3_1/q_3_1.groovy

@@ -99,6 +99,7 @@ suite ("mv_ssb_q_3_1") {
     sql """analyze table lineorder_flat with sync;"""
 
     sql """alter table lineorder_flat modify column LO_ORDERDATE set stats ('row_count'='2');"""
+    sql """alter table lineorder_flat modify column a1 set stats ('row_count'='1');"""
 
     mv_rewrite_success("""SELECT
                 C_NATION,

regression-test/suites/mv_p0/ssb/q_4_1/q_4_1.groovy

@@ -93,6 +93,7 @@ suite ("mv_ssb_q_4_1") {
     sql """analyze table lineorder_flat with sync;"""
 
     sql """alter table lineorder_flat modify column LO_ORDERDATE set stats ('row_count'='2');"""
+    sql """alter table lineorder_flat modify column a2 set stats ('row_count'='1');"""
 
     mv_rewrite_success("""SELECT (LO_ORDERDATE DIV 10000) AS YEAR,
                 C_NATION,

regression-test/suites/mv_p0/ssb/q_4_1_r1/q_4_1_r1.groovy

@@ -96,6 +96,7 @@ suite ("q_4_1_r1") {
 
     sql """analyze table lineorder_flat with sync;"""
     sql """alter table lineorder_flat modify column LO_ORDERDATE set stats ('row_count'='8');"""
+    sql """alter table lineorder_flat modify column a1 set stats ('row_count'='1');"""
     sql """set enable_stats=false;"""
 
     mv_rewrite_success("""SELECT (LO_ORDERDATE DIV 10000) AS YEAR,