diff --git a/src/stick_table.c b/src/stick_table.c
index fcc6fe6..101a4e2 100644
--- a/src/stick_table.c
+++ b/src/stick_table.c
@@ -875,6 +875,7 @@
 	smp->data.type = SMP_T_BOOL;
 	smp->data.u.sint = !!ts;
 	smp->flags = SMP_F_VOL_TEST;
+	stktable_release(t, ts);
 	return 1;
 }
 
@@ -907,12 +908,12 @@
 		return 1;
 
 	ptr = stktable_data_ptr(t, ts, STKTABLE_DT_BYTES_IN_RATE);
-	if (!ptr)
-		return 0; /* parameter not stored */
+	if (ptr)
+		smp->data.u.sint = read_freq_ctr_period(&stktable_data_cast(ptr, bytes_in_rate),
+                                                       t->data_arg[STKTABLE_DT_BYTES_IN_RATE].u);
 
-	smp->data.u.sint = read_freq_ctr_period(&stktable_data_cast(ptr, bytes_in_rate),
-					       t->data_arg[STKTABLE_DT_BYTES_IN_RATE].u);
-	return 1;
+	stktable_release(t, ts);
+	return !!ptr;
 }
 
 /* Casts sample <smp> to the type of the table specified in arg(0), and looks
@@ -944,11 +945,11 @@
 		return 1;
 
 	ptr = stktable_data_ptr(t, ts, STKTABLE_DT_CONN_CNT);
-	if (!ptr)
-		return 0; /* parameter not stored */
+	if (ptr)
+		smp->data.u.sint = stktable_data_cast(ptr, conn_cnt);
 
-	smp->data.u.sint = stktable_data_cast(ptr, conn_cnt);
-	return 1;
+	stktable_release(t, ts);
+	return !!ptr;
 }
 
 /* Casts sample <smp> to the type of the table specified in arg(0), and looks
@@ -980,11 +981,11 @@
 		return 1;
 
 	ptr = stktable_data_ptr(t, ts, STKTABLE_DT_CONN_CUR);
-	if (!ptr)
-		return 0; /* parameter not stored */
+	if (ptr)
+		smp->data.u.sint = stktable_data_cast(ptr, conn_cur);
 
-	smp->data.u.sint = stktable_data_cast(ptr, conn_cur);
-	return 1;
+	stktable_release(t, ts);
+	return !!ptr;
 }
 
 /* Casts sample <smp> to the type of the table specified in arg(0), and looks
@@ -1016,12 +1017,12 @@
 		return 1;
 
 	ptr = stktable_data_ptr(t, ts, STKTABLE_DT_CONN_RATE);
-	if (!ptr)
-		return 0; /* parameter not stored */
+	if (ptr)
+		smp->data.u.sint = read_freq_ctr_period(&stktable_data_cast(ptr, conn_rate),
+                                                       t->data_arg[STKTABLE_DT_CONN_RATE].u);
 
-	smp->data.u.sint = read_freq_ctr_period(&stktable_data_cast(ptr, conn_rate),
-					       t->data_arg[STKTABLE_DT_CONN_RATE].u);
-	return 1;
+	stktable_release(t, ts);
+	return !!ptr;
 }
 
 /* Casts sample <smp> to the type of the table specified in arg(0), and looks
@@ -1053,12 +1054,12 @@
 		return 1;
 
 	ptr = stktable_data_ptr(t, ts, STKTABLE_DT_BYTES_OUT_RATE);
-	if (!ptr)
-		return 0; /* parameter not stored */
+	if (ptr)
+		smp->data.u.sint = read_freq_ctr_period(&stktable_data_cast(ptr, bytes_out_rate),
+                                                       t->data_arg[STKTABLE_DT_BYTES_OUT_RATE].u);
 
-	smp->data.u.sint = read_freq_ctr_period(&stktable_data_cast(ptr, bytes_out_rate),
-					       t->data_arg[STKTABLE_DT_BYTES_OUT_RATE].u);
-	return 1;
+	stktable_release(t, ts);
+	return !!ptr;
 }
 
 /* Casts sample <smp> to the type of the table specified in arg(0), and looks
@@ -1090,11 +1091,11 @@
 		return 1;
 
 	ptr = stktable_data_ptr(t, ts, STKTABLE_DT_GPT0);
-	if (!ptr)
-		return 0; /* parameter not stored */
+	if (ptr)
+		smp->data.u.sint = stktable_data_cast(ptr, gpt0);
 
-	smp->data.u.sint = stktable_data_cast(ptr, gpt0);
-	return 1;
+	stktable_release(t, ts);
+	return !!ptr;
 }
 
 /* Casts sample <smp> to the type of the table specified in arg(0), and looks
@@ -1126,11 +1127,11 @@
 		return 1;
 
 	ptr = stktable_data_ptr(t, ts, STKTABLE_DT_GPC0);
-	if (!ptr)
-		return 0; /* parameter not stored */
+	if (ptr)
+		smp->data.u.sint = stktable_data_cast(ptr, gpc0);
 
-	smp->data.u.sint = stktable_data_cast(ptr, gpc0);
-	return 1;
+	stktable_release(t, ts);
+	return !!ptr;
 }
 
 /* Casts sample <smp> to the type of the table specified in arg(0), and looks
@@ -1162,12 +1163,12 @@
 		return 1;
 
 	ptr = stktable_data_ptr(t, ts, STKTABLE_DT_GPC0_RATE);
-	if (!ptr)
-		return 0; /* parameter not stored */
+	if (ptr)
+		smp->data.u.sint = read_freq_ctr_period(&stktable_data_cast(ptr, gpc0_rate),
+                                                       t->data_arg[STKTABLE_DT_GPC0_RATE].u);
 
-	smp->data.u.sint = read_freq_ctr_period(&stktable_data_cast(ptr, gpc0_rate),
-	                                      t->data_arg[STKTABLE_DT_GPC0_RATE].u);
-	return 1;
+	stktable_release(t, ts);
+	return !!ptr;
 }
 
 /* Casts sample <smp> to the type of the table specified in arg(0), and looks
@@ -1199,11 +1200,11 @@
 		return 1;
 
 	ptr = stktable_data_ptr(t, ts, STKTABLE_DT_GPC1);
-	if (!ptr)
-		return 0; /* parameter not stored */
+	if (ptr)
+		smp->data.u.sint = stktable_data_cast(ptr, gpc1);
 
-	smp->data.u.sint = stktable_data_cast(ptr, gpc1);
-	return 1;
+	stktable_release(t, ts);
+	return !!ptr;
 }
 
 /* Casts sample <smp> to the type of the table specified in arg(0), and looks
@@ -1235,12 +1236,12 @@
 		return 1;
 
 	ptr = stktable_data_ptr(t, ts, STKTABLE_DT_GPC1_RATE);
-	if (!ptr)
-		return 0; /* parameter not stored */
+	if (ptr)
+		smp->data.u.sint = read_freq_ctr_period(&stktable_data_cast(ptr, gpc1_rate),
+                                                       t->data_arg[STKTABLE_DT_GPC1_RATE].u);
 
-	smp->data.u.sint = read_freq_ctr_period(&stktable_data_cast(ptr, gpc1_rate),
-	                                      t->data_arg[STKTABLE_DT_GPC1_RATE].u);
-	return 1;
+	stktable_release(t, ts);
+	return !!ptr;
 }
 
 /* Casts sample <smp> to the type of the table specified in arg(0), and looks
@@ -1272,11 +1273,11 @@
 		return 1;
 
 	ptr = stktable_data_ptr(t, ts, STKTABLE_DT_HTTP_ERR_CNT);
-	if (!ptr)
-		return 0; /* parameter not stored */
+	if (ptr)
+		smp->data.u.sint = stktable_data_cast(ptr, http_err_cnt);
 
-	smp->data.u.sint = stktable_data_cast(ptr, http_err_cnt);
-	return 1;
+	stktable_release(t, ts);
+	return !!ptr;
 }
 
 /* Casts sample <smp> to the type of the table specified in arg(0), and looks
@@ -1308,12 +1309,12 @@
 		return 1;
 
 	ptr = stktable_data_ptr(t, ts, STKTABLE_DT_HTTP_ERR_RATE);
-	if (!ptr)
-		return 0; /* parameter not stored */
+	if (ptr)
+		smp->data.u.sint = read_freq_ctr_period(&stktable_data_cast(ptr, http_err_rate),
+                                                       t->data_arg[STKTABLE_DT_HTTP_ERR_RATE].u);
 
-	smp->data.u.sint = read_freq_ctr_period(&stktable_data_cast(ptr, http_err_rate),
-					       t->data_arg[STKTABLE_DT_HTTP_ERR_RATE].u);
-	return 1;
+	stktable_release(t, ts);
+	return !!ptr;
 }
 
 /* Casts sample <smp> to the type of the table specified in arg(0), and looks
@@ -1345,11 +1346,11 @@
 		return 1;
 
 	ptr = stktable_data_ptr(t, ts, STKTABLE_DT_HTTP_REQ_CNT);
-	if (!ptr)
-		return 0; /* parameter not stored */
+	if (ptr)
+		smp->data.u.sint = stktable_data_cast(ptr, http_req_cnt);
 
-	smp->data.u.sint = stktable_data_cast(ptr, http_req_cnt);
-	return 1;
+	stktable_release(t, ts);
+	return !!ptr;
 }
 
 /* Casts sample <smp> to the type of the table specified in arg(0), and looks
@@ -1381,12 +1382,12 @@
 		return 1;
 
 	ptr = stktable_data_ptr(t, ts, STKTABLE_DT_HTTP_REQ_RATE);
-	if (!ptr)
-		return 0; /* parameter not stored */
+	if (ptr)
+		smp->data.u.sint = read_freq_ctr_period(&stktable_data_cast(ptr, http_req_rate),
+                                                       t->data_arg[STKTABLE_DT_HTTP_REQ_RATE].u);
 
-	smp->data.u.sint = read_freq_ctr_period(&stktable_data_cast(ptr, http_req_rate),
-					       t->data_arg[STKTABLE_DT_HTTP_REQ_RATE].u);
-	return 1;
+	stktable_release(t, ts);
+	return !!ptr;
 }
 
 /* Casts sample <smp> to the type of the table specified in arg(0), and looks
@@ -1418,11 +1419,11 @@
 		return 1;
 
 	ptr = stktable_data_ptr(t, ts, STKTABLE_DT_BYTES_IN_CNT);
-	if (!ptr)
-		return 0; /* parameter not stored */
+	if (ptr)
+		smp->data.u.sint = stktable_data_cast(ptr, bytes_in_cnt) >> 10;
 
-	smp->data.u.sint = stktable_data_cast(ptr, bytes_in_cnt) >> 10;
-	return 1;
+	stktable_release(t, ts);
+	return !!ptr;
 }
 
 /* Casts sample <smp> to the type of the table specified in arg(0), and looks
@@ -1454,11 +1455,11 @@
 		return 1;
 
 	ptr = stktable_data_ptr(t, ts, STKTABLE_DT_BYTES_OUT_CNT);
-	if (!ptr)
-		return 0; /* parameter not stored */
+	if (ptr)
+		smp->data.u.sint = stktable_data_cast(ptr, bytes_out_cnt) >> 10;
 
-	smp->data.u.sint = stktable_data_cast(ptr, bytes_out_cnt) >> 10;
-	return 1;
+	stktable_release(t, ts);
+	return !!ptr;
 }
 
 /* Casts sample <smp> to the type of the table specified in arg(0), and looks
@@ -1490,11 +1491,11 @@
 		return 1;
 
 	ptr = stktable_data_ptr(t, ts, STKTABLE_DT_SERVER_ID);
-	if (!ptr)
-		return 0; /* parameter not stored */
+	if (ptr)
+		smp->data.u.sint = stktable_data_cast(ptr, server_id);
 
-	smp->data.u.sint = stktable_data_cast(ptr, server_id);
-	return 1;
+	stktable_release(t, ts);
+	return !!ptr;
 }
 
 /* Casts sample <smp> to the type of the table specified in arg(0), and looks
@@ -1526,11 +1527,11 @@
 		return 1;
 
 	ptr = stktable_data_ptr(t, ts, STKTABLE_DT_SESS_CNT);
-	if (!ptr)
-		return 0; /* parameter not stored */
+	if (ptr)
+		smp->data.u.sint = stktable_data_cast(ptr, sess_cnt);
 
-	smp->data.u.sint = stktable_data_cast(ptr, sess_cnt);
-	return 1;
+	stktable_release(t, ts);
+	return !!ptr;
 }
 
 /* Casts sample <smp> to the type of the table specified in arg(0), and looks
@@ -1562,12 +1563,12 @@
 		return 1;
 
 	ptr = stktable_data_ptr(t, ts, STKTABLE_DT_SESS_RATE);
-	if (!ptr)
-		return 0; /* parameter not stored */
+	if (ptr)
+		smp->data.u.sint = read_freq_ctr_period(&stktable_data_cast(ptr, sess_rate),
+                                                       t->data_arg[STKTABLE_DT_SESS_RATE].u);
 
-	smp->data.u.sint = read_freq_ctr_period(&stktable_data_cast(ptr, sess_rate),
-					       t->data_arg[STKTABLE_DT_SESS_RATE].u);
-	return 1;
+	stktable_release(t, ts);
+	return !!ptr;
 }
 
 /* Casts sample <smp> to the type of the table specified in arg(0), and looks
@@ -1597,6 +1598,7 @@
 	if (ts)
 		smp->data.u.sint = ts->ref_cnt;
 
+	stktable_release(t, ts);
 	return 1;
 }