diff --git a/pglite-REL_17_4_WASM/interactive_one.c b/pglite-REL_17_4_WASM/interactive_one.c
index 8261c17c498c2..04aaee51228a3 100644
--- a/pglite-REL_17_4_WASM/interactive_one.c
+++ b/pglite-REL_17_4_WASM/interactive_one.c
@@ -524,14 +524,14 @@ PDEBUG("# 500: NO DATA:" PGS_IN );
     printf("\n# 500: fd=%d is_embed=%d is_repl=%d is_wire=%d fd %s,len=%d cma=%d peek=%d [%s]\n", MyProcPort->sock, is_embed, is_repl, is_wire, PGS_OLOCK, packetlen,cma_rsize, peek, IO);
 #endif
 
-    // buffer query TODO: direct access ?
-    // CMA wire mode. -> packetlen was set to cma_rsize
     resetStringInfo(inBuf);
-
-    for (int i=0; i<packetlen; i++) {
-        appendStringInfoChar(inBuf, IO[i]);
+    // when cma buffer is used to fake stdin, data is not read by socket/wire backend.
+    if (is_repl) {
+        for (int i=0; i<packetlen; i++) {
+            appendStringInfoChar(inBuf, IO[i]);
+        }
     }
-
+	
     if (packetlen<2) {
         puts("# 512: WARNING: empty packet");
         //cma_rsize= 0;