[fix](mv) Fix sync mv could not be chosen by cbo stable because stats upload from be not in time (#58720)

This PR introduces two key modifications to improve the reliability of
the optimizer (CBO) and the testing pipeline concerning materialized
views:
1. Fixes unstable selection of synchronous materialized views in the
pipeline:​ The root cause was that the statistical information of the
base table was not reported promptly. This delay could lead the CBO to
estimate selectedPartitionsRowCountas zero for the materialized view,
causing it to be incorrectly bypassed during query planning. The fix
involves manually injecting the statistical information for the
synchronous materialized view​ when available, ensuring the CBO can make
a stable and accurate assessment of its cost .

2. Removes the fuzzy value setting for
preMaterializedViewRewriteStrategyin SessionVariable:​ The test cases
for the TRY_IN_RBO strategy have already been extended to cover
scenarios equivalent to both NOT_IN_RBO and FORCE_IN_RBO. Retaining the
fuzzy option can introduce unnecessary instability into the pipeline.
For instance, a PR might pass tests when the strategy is TRY_IN_RBO but
fail if the pipeline randomly selects NOT_IN_RBO, leading to
inconsistent results. Removing this fuzzy setting helps eliminate such
non-deterministic failures and enhances pipeline stability

Author: seawinde

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

@@ -32,7 +32,6 @@
 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;
@@ -3301,20 +3300,6 @@ 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,