From 2a92cd0ba6f179fbdec991a65ae18106a1bb04b4 Mon Sep 17 00:00:00 2001
From: Bob den Os <bob.den.os@sap.com>
Date: Tue, 10 Feb 2026 11:37:01 +0100
Subject: [PATCH] Keep space for potential client info updates

---
 lib/protocol/ClientInfo.js |  8 ++++++++
 lib/protocol/Connection.js |  1 +
 test/lib.Connection.js     | 10 ++++++++++
 3 files changed, 19 insertions(+)

diff --git a/lib/protocol/ClientInfo.js b/lib/protocol/ClientInfo.js
index 22630a5..f6769ad 100644
--- a/lib/protocol/ClientInfo.js
+++ b/lib/protocol/ClientInfo.js
@@ -75,3 +75,11 @@ ClientInfo.prototype.getUpdatedProperties = function getUpdatedProperties() {
   return res;
 };
 
+ClientInfo.prototype.getUpdatedPropertiesSize = function getUpdatedProperties() {
+  var self = this;
+  var res = Object.keys(this._updatedProperties).reduce(function (p, c) {
+    p += c.length + self._properties[c].length
+    return p;
+  }, 0);
+  return res;
+};
diff --git a/lib/protocol/Connection.js b/lib/protocol/Connection.js
index 7191cb5..8982aeb 100644
--- a/lib/protocol/Connection.js
+++ b/lib/protocol/Connection.js
@@ -405,6 +405,7 @@ Connection.prototype.getAvailableSize = function getAvailableSize(forLobs = fals
   if (this._statementContext) {
     availableSize -= this._statementContext.size;
   }
+  availableSize -= this._clientInfo.getUpdatedPropertiesSize() + SEGMENT_HEADER_LENGTH
   return availableSize;
 };
 
diff --git a/test/lib.Connection.js b/test/lib.Connection.js
index 94ed6d7..7eeeb56 100644
--- a/test/lib.Connection.js
+++ b/test/lib.Connection.js
@@ -365,6 +365,16 @@ describe('Lib', function () {
       var c8 = createConnection({ packetSize: ps, packetSizeLimit: psl });
       c8.getAvailableSize(false).should.equal(packetSizeMax - totalHeaderLength);
       c8.getAvailableSize(true).should.equal(packetSizeMax - totalHeaderLength);
+
+      // client info property set
+      var c9 = createConnection();
+      c9._statementContext = {
+        size: 32,
+      };
+      c9.getClientInfo().setProperty('LOCALE', 'en_US');
+      var clientInfoSize = 11
+      c9.getAvailableSize().should.equal(packetSizeDefault - totalHeaderLength - 32 - clientInfoSize - 24);
+      c9.getAvailableSize(true).should.equal(packetSizeDefault - totalHeaderLength - 32 - clientInfoSize - 24);
     });
 
     it('should parse a reply', function () {