Function get_schema_column_record

sql/sql_show.cc:6541–6702

}

static
int get_schema_column_record(THD *thd, TABLE_LIST *tables,
                             TABLE *table, //!< @ref Show::columns_fields_info
                             bool res,
                             const LEX_CSTRING *db_name,
                             const LEX_CSTRING *table_name)
{
  LEX *lex= thd->lex;
  const char *wild= lex->wild ? lex->wild->ptr() : NullS;
  CHARSET_INFO *cs= system_charset_info;
  TABLE *show_table;
  Field **ptr, *field;
  int count;
  bool quoted_defaults= lex->sql_command != SQLCOM_SHOW_FIELDS;
  DBUG_ENTER("get_schema_column_record");

  show_table= tables->table;
  count= 0;
  ptr= show_table->field;
  show_table->use_all_columns();               // Required for default
  restore_record(show_table, s->default_values);

#ifndef NO_EMBEDDED_ACCESS_CHECKS
  check_access(thd, SELECT_ACL, db_name->str,
               &tables->grant.privilege, 0, 0, MY_TEST(tables->schema_table));
  if (is_temporary_table(tables))
  {
    tables->grant.privilege|= TMP_TABLE_ACLS;
  }
#endif

  for (; (field= *ptr) ; ptr++)
  {
    if(field->invisible > INVISIBLE_USER)
      continue;
    uchar *pos;
    char tmp[MAX_FIELD_WIDTH];
    String type(tmp,sizeof(tmp), system_charset_info);

    DEBUG_SYNC(thd, "get_schema_column");

    if (wild && wild[0] &&
        wild_case_compare(system_charset_info, field->field_name.str, wild))
      continue;

    count++;
    /* Get default row, with all NULL fields set to NULL */
    restore_record(table, s->default_values);

#ifndef NO_EMBEDDED_ACCESS_CHECKS
    ulonglong col_access=
      get_column_grant(thd, &tables->grant, db_name->str, table_name->str,
                       field->field_name) & COL_ACLS;

    if (!col_access && !tables->schema_table)
      continue;

    char *end= tmp;