diff --git a/Makefile b/Makefile
index 2bc0117..7a6f0b7 100644
--- a/Makefile
+++ b/Makefile
@@ -10,6 +10,7 @@ PGFILEDESC = "pg_stat_monitor - execution statistics of SQL statements"
 
 LDFLAGS_SL += $(filter -lm, $(LIBS)) 
 
+TAP_TESTS = 1
 REGRESS_OPTS = --temp-config $(top_srcdir)/contrib/pg_stat_monitor/pg_stat_monitor.conf --inputdir=regression
 REGRESS = basic version guc counters relations database error_insert application_name application_name_unique top_query cmd_type error rows tags histogram
 
@@ -17,50 +18,11 @@ REGRESS = basic version guc counters relations database error_insert application
 # which typical installcheck users do not have (e.g. buildfarm clients).
 # NO_INSTALLCHECK = 1
 
-
 PG_CONFIG = pg_config
-PG_VERSION := $(shell pg_config --version | awk {'print $$1 $$2'})
-MAJOR := $(shell echo $(PG_VERSION) | sed -e 's/\.[^./]*$$//')
-
-ifneq (,$(findstring PostgreSQL14,$(MAJOR)))
-  ifneq (,$(wildcard ../pg_stat_monitor--1.0.14.sql.in))
-    CP := $(shell cp ../pg_stat_monitor--1.0.14.sql.in ../pg_stat_monitor--1.0.sql)
-  endif
-  ifneq (,$(wildcard pg_stat_monitor--1.0.14.sql.in))
-    CP := $(shell cp pg_stat_monitor--1.0.14.sql.in pg_stat_monitor--1.0.sql)
-  endif
-  TAP_TESTS = 1
-endif
-
-ifneq (,$(findstring PostgreSQL13,$(MAJOR)))
-  ifneq (,$(wildcard ../pg_stat_monitor--1.0.13.sql.in))
-    CP := $(shell cp ../pg_stat_monitor--1.0.13.sql.in ../pg_stat_monitor--1.0.sql)
-  endif
-  ifneq (,$(wildcard pg_stat_monitor--1.0.13.sql.in))
-    CP := $(shell cp pg_stat_monitor--1.0.13.sql.in pg_stat_monitor--1.0.sql)
-  endif
-  TAP_TESTS = 1
-endif
-
-ifneq (,$(findstring PostgreSQL12,$(MAJOR)))
-  ifneq (,$(wildcard ../pg_stat_monitor--1.0.sql.in))
-    CP := $(shell cp ../pg_stat_monitor--1.0.sql.in ../pg_stat_monitor--1.0.sql)
-  endif
-  ifneq (,$(wildcard pg_stat_monitor--1.0.sql.in))
-    CP := $(shell cp pg_stat_monitor--1.0.sql.in pg_stat_monitor--1.0.sql)
-  endif
-endif
-
-ifneq (,$(findstring PostgreSQL11,$(MAJOR)))
-  ifneq (,$(wildcard ../pg_stat_monitor--1.0.sql.in))
-    CP := $(shell cp ../pg_stat_monitor--1.0.sql.in ../pg_stat_monitor--1.0.sql)
-  endif
-  ifneq (,$(wildcard pg_stat_monitor--1.0.sql.in))
-    CP := $(shell cp pg_stat_monitor--1.0.sql.in pg_stat_monitor--1.0.sql)
-  endif
-endif
+PGSM_INPUT_SQL_VERSION := 1.0
 
 ifdef USE_PGXS
+MAJORVERSION := $(shell pg_config --version | awk {'print $$2'} | cut -f1 -d".")
 PGXS := $(shell $(PG_CONFIG) --pgxs)
 include $(PGXS)
 else
@@ -69,3 +31,20 @@ top_builddir = ../..
 include $(top_builddir)/src/Makefile.global
 include $(top_srcdir)/contrib/contrib-global.mk
 endif
+
+ifeq ($(shell test $(MAJORVERSION) -gt 12; echo $$?),0)
+PGSM_INPUT_SQL_VERSION := ${PGSM_INPUT_SQL_VERSION}.${MAJORVERSION}
+endif
+
+$(info Using pg_stat_monitor--${PGSM_INPUT_SQL_VERSION}.sql.in file to generate sql filea.)
+
+ifneq (,$(wildcard ../pg_stat_monitor--${PGSM_INPUT_SQL_VERSION}.sql.in))
+  CP := $(shell cp -v ../pg_stat_monitor--${PGSM_INPUT_SQL_VERSION}.sql.in ../pg_stat_monitor--1.0.sql)
+endif
+ifneq (,$(wildcard pg_stat_monitor--${PGSM_INPUT_SQL_VERSION}.sql.in))
+  CP := $(shell cp -v pg_stat_monitor--${PGSM_INPUT_SQL_VERSION}.sql.in pg_stat_monitor--1.0.sql)
+endif
+
+clean:
+	rm -rf ${DATA}
+	rm -rf t/results