fix: enhance compile_udf.sh to locate MySQL/MariaDB server headers and update error messages for clarity

Author: sanikolaev

mysqlse/compile_udf.sh

@@ -7,21 +7,26 @@ set -e
 
 echo "Compiling snippets_udf.cc for MySQL/MariaDB..."
 
-# Find MySQL/MariaDB headers
+# Find MySQL/MariaDB server headers (needed for sql_class.h)
 MYSQL_INCLUDE=""
-for path in "/usr/include/mysql" "/usr/local/include/mysql" "/opt/homebrew/include/mysql" "/usr/local/mysql/include" "/usr/include/mariadb" "/usr/local/include/mariadb" "/opt/homebrew/include/mariadb"; do
+for path in "/usr/include/mysql/server" "/usr/include/mariadb/server" "/usr/include/mysql/server/private" "/usr/include/mariadb/server/private" "/usr/include/mysql" "/usr/include/mariadb" "/usr/local/include/mysql" "/opt/homebrew/include/mysql"; do
     if [ -d "$path" ]; then
-        MYSQL_INCLUDE="$path"
-        break
+        # Check if sql_class.h exists in this path
+        if [ -f "$path/sql_class.h" ] || [ -f "$path/private/sql_class.h" ]; then
+            MYSQL_INCLUDE="$path"
+            break
+        fi
     fi
 done
 
 if [ -z "$MYSQL_INCLUDE" ]; then
-    echo "❌ MySQL/MariaDB headers not found!"
-    echo "Install development package:"
-    echo "  macOS: brew install mysql (or mariadb)"
-    echo "  Ubuntu: sudo apt-get install libmysqlclient-dev (or libmariadb-dev)"
-    echo "  CentOS: sudo yum install mysql-devel (or mariadb-devel)"
+    echo "❌ MySQL/MariaDB server headers not found!"
+    echo "Install server development package:"
+    echo "  Ubuntu/Debian: sudo apt-get install mariadb-server-dev-10.6 (or similar version)"
+    echo "  CentOS/RHEL: sudo yum install mariadb-devel"
+    echo "  Fedora: sudo dnf install mariadb11.8-devel"
+    echo ""
+    echo "Note: You need server headers (not just client headers) for sql_class.h"
     exit 1
 fi