Method shrink

sql/sql_string.cc:1297–1307

Shrink the buffer, but only if it is allocated on the heap.

// Shrink the buffer, but only if it is allocated on the heap.
void Binary_string::shrink(size_t arg_length)
{
  if (is_alloced() && ALIGN_SIZE(arg_length + 1) < Alloced_length)
  {
    /* my_realloc() can't fail as new buffer is less than the original one */
    Ptr= (char*) my_realloc(STRING_PSI_MEMORY_KEY, Ptr, arg_length,
                            MYF(thread_specific ?
                                MY_THREAD_SPECIFIC : 0));
    Alloced_length= (uint32) arg_length;
  }
}