!22 Fix compile error in mysql_fdw.

Merge pull request !22 from TotaJ/bug/mysql_fdw

contrib/mysql_fdw/Makefile

@@ -33,12 +33,11 @@ MYSQL_FDW_MEGRED_SOURCES_DIR=$(MYSQL_FDW_DIR)/code
 .PHONY: mysql_fdw_target
 mysql_fdw_target:
 	@$(call create_mysql_fdw_sources)
-	@make -C $(MYSQL_FDW_MEGRED_SOURCES_DIR)/$(MYSQL_FDW_PACKAGE) USE_PGXS=1
+	@make -C $(MYSQL_FDW_MEGRED_SOURCES_DIR)/$(MYSQL_FDW_PACKAGE)
 
 .PHONY: install-data
-install-data:
-	@$(call create_mysql_fdw_sources)
-	@make -C $(MYSQL_FDW_MEGRED_SOURCES_DIR)/$(MYSQL_FDW_PACKAGE) USE_PGXS=1 install
+install-data: mysql_fdw_target
+	@make -C $(MYSQL_FDW_MEGRED_SOURCES_DIR)/$(MYSQL_FDW_PACKAGE) install
 
 uninstall distclean clean:
 	@rm -rf $(MYSQL_FDW_MEGRED_SOURCES_DIR)

third_party/dependency/mysql_fdw/huawei_mysql_fdw-2.5.3_patch.patch

@@ -20,7 +20,7 @@ index d5e7b36..157a6cf 100644
  
  ifdef USE_PGXS
  PG_CONFIG = pg_config
-@@ -48,8 +50,8 @@ include $(PGXS)
+@@ -48,13 +50,12 @@ include $(PGXS)
  ifndef MAJORVERSION
  MAJORVERSION := $(basename $(VERSION))
  endif
@@ -31,6 +31,12 @@ index d5e7b36..157a6cf 100644
  endif
  
  else
+-subdir = contrib/mysql_fdw
+-top_builddir = ../..
++top_builddir = ../../../../../
+ include $(top_builddir)/src/Makefile.global
+ include $(top_srcdir)/contrib/contrib-global.mk
+ endif
 diff --git a/code/mysql_fdw-REL-2_5_3/connection.cpp b/code/mysql_fdw-REL-2_5_3/connection.cpp
 index 6b18027..0a9e40f 100644
 --- a/code/mysql_fdw-REL-2_5_3/connection.cpp