fix no_unity build error for inc_build_test regression

src/sql/engine/cmd/ob_variable_set_executor.h

@@ -85,9 +85,9 @@ private:
       cur_special_count_(0)
     {}
     int init(uint64_t tenant_id);
-    int get_current_val(schema::ObSchemaGetterGuard &schema_guard,
+    int get_current_val(share::schema::ObSchemaGetterGuard &schema_guard,
                         uint64_t tenant_id,
-                        ObSysVarClassType var_id,
+                        share::ObSysVarClassType var_id,
                         uint64_t &val);
     int update_expect_length();
 

src/sql/engine/expr/ob_expr_convert.cpp

@@ -19,6 +19,7 @@
 #include "sql/session/ob_sql_session_info.h"
 #include "sql/engine/expr/ob_expr_result_type_util.h"
 #include "sql/engine/expr/ob_expr_lob_utils.h"
+#include "sql/engine/ob_exec_context.h"
 
 using namespace oceanbase::common;
 using namespace oceanbase::sql;

src/sql/engine/expr/ob_expr_xml_element.cpp

@@ -13,6 +13,7 @@
 
 #define USING_LOG_PREFIX SQL_ENG
 #include "ob_expr_xml_element.h"
+#include "sql/engine/ob_exec_context.h"
 #ifdef OB_BUILD_ORACLE_XML
 #include "lib/xml/ob_xml_util.h"
 #include "sql/engine/expr/ob_expr_xml_func_helper.h"

src/sql/engine/sequence/ob_sequence_op.cpp

@@ -16,6 +16,7 @@
 #include "sql/session/ob_sql_session_info.h"
 #include "sql/engine/ob_physical_plan.h"
 #include "sql/engine/ob_exec_context.h"
+#include "sql/engine/dml/ob_link_op.h"
 
 namespace oceanbase
 {

src/sql/engine/sequence/ob_sequence_op.h

@@ -15,6 +15,7 @@
 #include "sql/engine/ob_operator.h"
 #include "share/sequence/ob_sequence_cache.h"
 #include "share/schema/ob_schema_struct.h"
+#include "lib/mysqlclient/ob_isql_connection_pool.h"
 
 namespace oceanbase
 {