Function open_and_process_table

sql/sql_base.cc:4085–4402

*/

static bool
open_and_process_table(THD *thd, TABLE_LIST *tables, uint *counter, uint flags,
                       Prelocking_strategy *prelocking_strategy,
                       bool has_prelocking_list, Open_table_context *ot_ctx)
{
  bool error= FALSE;
  bool safe_to_ignore_table= FALSE;
  LEX *lex= thd->lex;
  DBUG_ENTER("open_and_process_table");
  DEBUG_SYNC(thd, "open_and_process_table");

  /*
    Ignore placeholders for derived tables. After derived tables
    processing, link to created temporary table will be put here.
    If this is derived table for view then we still want to process
    routines used by this view.
  */
  if (tables->derived)
  {
    if (!tables->view)
    {
      if (!tables->is_derived())
        tables->set_derived();
      goto end;
    }
    /*
      We restore view's name and database wiped out by derived tables
      processing and fall back to standard open process in order to
      obtain proper metadata locks and do other necessary steps like
      stored routine processing.
    */
    tables->db= tables->view_db;
    tables->table_name= tables->view_name;
  }

  if (!tables->derived && is_infoschema_db(&tables->db))
  {
    /*
      Check whether the information schema contains a table
      whose name is tables->schema_table_name
    */
    ST_SCHEMA_TABLE *schema_table= tables->schema_table;
    if (!schema_table ||
        (schema_table->hidden &&
         ((sql_command_flags[lex->sql_command] & CF_STATUS_COMMAND) == 0 ||
          /*
            this check is used for show columns|keys from I_S hidden table
          */
          lex->sql_command == SQLCOM_SHOW_FIELDS ||
          lex->sql_command == SQLCOM_SHOW_KEYS)))
    {
      my_error(ER_UNKNOWN_TABLE, MYF(0),
               tables->table_name.str, INFORMATION_SCHEMA_NAME.str);
      DBUG_RETURN(1);
    }
  }
  /*
    If this TABLE_LIST object is a placeholder for an information_schema