开放ALTER SEQUENCE支持修改cache

src/gausskernel/optimizer/commands/sequence.cpp

@@ -1990,7 +1990,8 @@ static void check_value_min_max(int64 value, int64 min_value, int64 max_value)
             /* isInit is true for DefineSequence, false for AlterSequence, we use it
              * to differentiate them
              */
-            if (strcmp(defel->defname, "owned_by") != 0 && strcmp(defel->defname, "maxvalue") != 0) {
+            if (strcmp(defel->defname, "owned_by") != 0 && strcmp(defel->defname, "maxvalue") != 0 &&
+                strcmp(defel->defname, "cache") != 0) {
                 ereport(
                     ERROR, (errcode(ERRCODE_FEATURE_NOT_SUPPORTED), errmsg("ALTER SEQUENCE is not yet supported.")));
             }

src/test/regress/input/sequence_cache_test.source

@@ -0,0 +1,21 @@
+drop table if exists test_tab;
+drop sequence if exists test_seq;
+create sequence test_seq cache 2;
+create table test_tab(id int default nextVal('test_seq'), name varchar(20));
+create user test_user with password 'openGauss@123';
+grant all privileges to test_user;
+select last_value from test_seq;
+insert into test_tab(name) values('test1');
+select last_value from test_seq;
+insert into test_tab(name) values('test2'),('test3');
+select * from test_tab;
+select last_value from test_seq;
+\! @abs_bindir@/gsql -d regression -p @portstring@ -U test_user -W openGauss@123 -c "insert into test_tab(name) values('test5');"
+\! @abs_bindir@/gsql -d regression -p @portstring@ -U test_user -W openGauss@123 -c "select last_value from test_seq;"
+\! @abs_bindir@/gsql -d regression -p @portstring@ -U test_user -W openGauss@123 -c "select * from test_tab;"
+\! @abs_bindir@/gsql -d regression -p @portstring@ -U test_user -W openGauss@123 -c  "insert into test_tab(name) values('test7');"
+\! @abs_bindir@/gsql -d regression -p @portstring@ -U test_user -W openGauss@123 -c  "select last_value from test_seq;"
+\! @abs_bindir@/gsql -d regression -p @portstring@ -U test_user -W openGauss@123 -c  "select * from test_tab;"
+drop user test_user cascade;
+drop table if exists test_tab;
+drop sequence if exists test_seq;

src/test/regress/output/sequence_cache_test.source

@@ -0,0 +1,74 @@
+drop table if exists test_tab;
+NOTICE:  table "test_tab" does not exist, skipping
+drop sequence if exists test_seq;
+NOTICE:  sequence "test_seq" does not exist, skipping
+create sequence test_seq cache 2;
+create table test_tab(id int default nextVal('test_seq'), name varchar(20));
+create user test_user with password 'openGauss@123';
+grant all privileges to test_user;
+select last_value from test_seq;
+ last_value 
+------------
+          1
+(1 row)
+
+insert into test_tab(name) values('test1');
+select last_value from test_seq;
+ last_value 
+------------
+          2
+(1 row)
+
+insert into test_tab(name) values('test2'),('test3');
+select * from test_tab;
+ id | name  
+----+-------
+  1 | test1
+  2 | test2
+  3 | test3
+(3 rows)
+
+select last_value from test_seq;
+ last_value 
+------------
+          4
+(1 row)
+
+\! @abs_bindir@/gsql -d regression -p @portstring@ -U test_user -W openGauss@123 -c "insert into test_tab(name) values('test5');"
+INSERT 0 1
+\! @abs_bindir@/gsql -d regression -p @portstring@ -U test_user -W openGauss@123 -c "select last_value from test_seq;"
+ last_value 
+------------
+          6
+(1 row)
+
+\! @abs_bindir@/gsql -d regression -p @portstring@ -U test_user -W openGauss@123 -c "select * from test_tab;"
+ id | name  
+----+-------
+  1 | test1
+  2 | test2
+  3 | test3
+  5 | test5
+(4 rows)
+
+\! @abs_bindir@/gsql -d regression -p @portstring@ -U test_user -W openGauss@123 -c  "insert into test_tab(name) values('test7');"
+INSERT 0 1
+\! @abs_bindir@/gsql -d regression -p @portstring@ -U test_user -W openGauss@123 -c  "select last_value from test_seq;"
+ last_value 
+------------
+          8
+(1 row)
+
+\! @abs_bindir@/gsql -d regression -p @portstring@ -U test_user -W openGauss@123 -c  "select * from test_tab;"
+ id | name  
+----+-------
+  1 | test1
+  2 | test2
+  3 | test3
+  5 | test5
+  7 | test7
+(5 rows)
+
+drop user test_user cascade;
+drop table if exists test_tab;
+drop sequence if exists test_seq;

src/test/regress/parallel_schedule0

@@ -760,3 +760,4 @@ test: leaky_function_operator
 #test: gs_guc
 
 test: smp
+test: sequence_cache_test