Mysql源码学习——词法分析MYSQLlex(3)

    ctype_latin1,

    to_lower_latin1,

    to_upper_latin1,

    sort_order_latin1,

    NULL,           /* contractions */

    NULL,           /* sort_order_big*/

    cs_to_uni,             /* tab_to_uni   */

    NULL,           /* tab_from_uni */

    my_unicase_default, /* caseinfo     */

    NULL,           /* state_map    */

    NULL,           /* ident_map    */

    1,                  /* strxfrm_multiply */

    1,                  /* caseup_multiply  */

    1,                  /* casedn_multiply  */

    1,                  /* mbminlen   */

    1,                  /* mbmaxlen  */

    0,                  /* min_sort_char */

    255,        /* max_sort_char */

    ' ',                /* pad char      */

    0,                  /* escape_with_backslash_is_dangerous */

    &my_charset_handler,

    &my_collation_8bit_simple_ci_handler

};

　　可以看出ctype = ctype_latin1；而ctype_latin1值为：

static uchar ctype_latin1[] = {

    0,

   32, 32, 32, 32, 32, 32, 32, 32, 32, 40, 40, 40, 40, 40, 32, 32,

   32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32,

   72, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,

  132,132,132,132,132,132,132,132,132,132, 16, 16, 16, 16, 16, 16,

   16,129,129,129,129,129,129,  1,  1,  1,  1,  1,  1,  1,  1,  1,