diff --git a/dest.c b/dest.c
index 4053c9b..afe8446 100644
--- a/dest.c
+++ b/dest.c
@@ -3,6 +3,7 @@
 
 enum PIPES {READ, WRITE};
 extern Task task;
+static emit_log_hook_type emit_log_hook_prev = NULL;
 static int stdout_fd;
 static int stdout_pipe[2];
 
@@ -95,7 +96,7 @@ DestReceiver myDestReceiver = {
     .mydest = DestDebug,
 };
 
-DestReceiver *CreateDestReceiverMy(CommandDest dest) {
+static DestReceiver *CreateDestReceiverMy(CommandDest dest) {
     elog(DEBUG1, "id = %li", task.shared->id);
     if ((stdout_fd = dup(STDOUT_FILENO)) < 0) ereport(ERROR, (errcode_for_socket_access(), errmsg("dup < 0"), errdetail("%m")));
     if (pipe(stdout_pipe) < 0) ereport(ERROR, (errcode_for_socket_access(), errmsg("pipe < 0"), errdetail("%m")));
@@ -109,20 +110,20 @@ DestReceiver *CreateDestReceiverMy(CommandDest dest) {
 #endif
 }
 
-void ReadyForQueryMy(CommandDest dest) {
+static void ReadyForQueryMy(CommandDest dest) {
     elog(DEBUG1, "id = %li", task.shared->id);
 }
 
-void NullCommandMy(CommandDest dest) {
+static void NullCommandMy(CommandDest dest) {
     elog(DEBUG1, "id = %li", task.shared->id);
 }
 
 #if PG_VERSION_NUM >= 130000
-void BeginCommandMy(CommandTag commandTag, CommandDest dest) {
+static void BeginCommandMy(CommandTag commandTag, CommandDest dest) {
     elog(DEBUG1, "id = %li, commandTag = %s", task.shared->id, GetCommandTagName(commandTag));
 }
 
-void EndCommandMy(const QueryCompletion *qc, CommandDest dest, bool force_undecorated_output) {
+static void EndCommandMy(const QueryCompletion *qc, CommandDest dest, bool force_undecorated_output) {
     char completionTag[COMPLETION_TAG_BUFSIZE];
     CommandTag tag = qc->commandTag;
     const char *tagname = GetCommandTagName(tag);
@@ -136,11 +137,11 @@ void EndCommandMy(const QueryCompletion *qc, CommandDest dest, bool force_undeco
     }
 }
 #else
-void BeginCommandMy(const char *commandTag, CommandDest dest) {
+static void BeginCommandMy(const char *commandTag, CommandDest dest) {
     elog(DEBUG1, "id = %li, commandTag = %s", task.shared->id, commandTag);
 }
 
-void EndCommandMy(const char *commandTag, CommandDest dest) {
+static void EndCommandMy(const char *commandTag, CommandDest dest) {
     elog(DEBUG1, "id = %li, commandTag = %s", task.shared->id, commandTag);
     if (task.skip) task.skip = 0; else {
         if (!task.output.data) initStringInfoMy(&task.output);
@@ -149,3 +150,46 @@ void EndCommandMy(const char *commandTag, CommandDest dest) {
     }
 }
 #endif
+
+#if PG_VERSION_NUM < 90500
+#define PQArgBlock undef
+#endif
+
+#include <postgres.c>
+
+void task_execute(void) {
+    MemoryContext oldMemoryContext = MemoryContextSwitchTo(MessageContext);
+    MemoryContextResetAndDeleteChildren(MessageContext);
+    InvalidateCatalogSnapshotConditionally();
+    MemoryContextSwitchTo(oldMemoryContext);
+    whereToSendOutput = DestDebug;
+    ReadyForQueryMy(whereToSendOutput);
+    SetCurrentStatementStartTimestamp();
+    exec_simple_query(task.input);
+    if (IsTransactionState()) exec_simple_query(SQL(COMMIT));
+    if (IsTransactionState()) ereport(ERROR, (errcode(ERRCODE_ACTIVE_SQL_TRANSACTION), errmsg("still active sql transaction")));
+}
+
+void task_catch(void) {
+    HOLD_INTERRUPTS();
+    disable_all_timeouts(false);
+    QueryCancelPending = false;
+    emit_log_hook_prev = emit_log_hook;
+    emit_log_hook = task_error;
+    EmitErrorReport();
+    debug_query_string = NULL;
+    AbortOutOfAnyTransaction();
+#if PG_VERSION_NUM >= 110000
+    PortalErrorCleanup();
+#endif
+    if (MyReplicationSlot) ReplicationSlotRelease();
+#if PG_VERSION_NUM >= 100000
+    ReplicationSlotCleanup();
+#endif
+#if PG_VERSION_NUM >= 110000
+    jit_reset_after_error();
+#endif
+    FlushErrorState();
+    xact_started = false;
+    RESUME_INTERRUPTS();
+}
diff --git a/dest.h b/dest.h
deleted file mode 100644
index c927599..0000000
--- a/dest.h
+++ /dev/null
@@ -1,22 +0,0 @@
-#ifndef _DEST_H
-#define _DEST_H
-
-#include <postgres.h>
-
-#include <tcop/dest.h>
-
-DestReceiver *CreateDestReceiverMy(CommandDest dest);
-#if PG_VERSION_NUM >= 130000
-void BeginCommandMy(CommandTag commandTag, CommandDest dest);
-#else
-void BeginCommandMy(const char *commandTag, CommandDest dest);
-#endif
-#if PG_VERSION_NUM >= 130000
-void EndCommandMy(const QueryCompletion *qc, CommandDest dest, bool force_undecorated_output);
-#else
-void EndCommandMy(const char *commandTag, CommandDest dest);
-#endif
-void NullCommandMy(CommandDest dest);
-void ReadyForQueryMy(CommandDest dest);
-
-#endif // _DEST_H
diff --git a/include.h b/include.h
index 6a760fa..ed85762 100644
--- a/include.h
+++ b/include.h
@@ -71,7 +71,7 @@ extern void SignalHandlerForShutdownRequest(SIGNAL_ARGS);
 #include <utils/timeout.h>
 #include <utils/timestamp.h>
 
-#include "dest.h"
+//#include "dest.h"
 
 #ifdef GP_VERSION_NUM
 #include "cdb/cdbvars.h"
@@ -240,7 +240,9 @@ void SPI_cursor_fetch_my(const char *src, Portal portal, bool forward, long coun
 void SPI_execute_plan_my(const char *src, SPIPlanPtr plan, Datum *values, const char *nulls, int res);
 void SPI_execute_with_args_my(const char *src, int nargs, Oid *argtypes, Datum *values, const char *nulls, int res);
 void SPI_finish_my(void);
+void task_catch(void);
 void task_error(ErrorData *edata);
+void task_execute(void);
 void task_free(Task *t);
 void taskshared_free(int slot);
 void workshared_free(int slot);
diff --git a/task.c b/task.c
index 964a957..4fd5dd5 100644
--- a/task.c
+++ b/task.c
@@ -1,11 +1,5 @@
 #include "include.h"
 
-#if PG_VERSION_NUM < 90500
-#define PQArgBlock undef
-#endif
-
-#include <postgres.c>
-
 extern char *task_null;
 extern int task_fetch;
 extern TaskShared *taskshared;
@@ -290,19 +284,6 @@ void task_error(ErrorData *edata) {
     }
 }
 
-static void task_execute(void) {
-    MemoryContext oldMemoryContext = MemoryContextSwitchTo(MessageContext);
-    MemoryContextResetAndDeleteChildren(MessageContext);
-    InvalidateCatalogSnapshotConditionally();
-    MemoryContextSwitchTo(oldMemoryContext);
-    whereToSendOutput = DestDebug;
-    ReadyForQueryMy(whereToSendOutput);
-    SetCurrentStatementStartTimestamp();
-    exec_simple_query(task.input);
-    if (IsTransactionState()) exec_simple_query(SQL(COMMIT));
-    if (IsTransactionState()) ereport(ERROR, (errcode(ERRCODE_ACTIVE_SQL_TRANSACTION), errmsg("still active sql transaction")));
-}
-
 void taskshared_free(int slot) {
     LWLockAcquire(BackgroundWorkerLock, LW_EXCLUSIVE);
     pg_read_barrier();
@@ -315,30 +296,6 @@ static void task_shmem_exit(int code, Datum arg) {
     taskshared_free(DatumGetInt32(arg));
 }
 
-static void task_catch(void) {
-    HOLD_INTERRUPTS();
-    disable_all_timeouts(false);
-    QueryCancelPending = false;
-    emit_log_hook_prev = emit_log_hook;
-    emit_log_hook = task_error;
-    EmitErrorReport();
-    debug_query_string = NULL;
-    AbortOutOfAnyTransaction();
-#if PG_VERSION_NUM >= 110000
-    PortalErrorCleanup();
-#endif
-    if (MyReplicationSlot) ReplicationSlotRelease();
-#if PG_VERSION_NUM >= 100000
-    ReplicationSlotCleanup();
-#endif
-#if PG_VERSION_NUM >= 110000
-    jit_reset_after_error();
-#endif
-    FlushErrorState();
-    xact_started = false;
-    RESUME_INTERRUPTS();
-}
-
 static void task_latch(void) {
     ResetLatch(MyLatch);
     CHECK_FOR_INTERRUPTS();