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  • Committer: Padraig O'Sullivan
  • Date: 2009-06-17 19:39:27 UTC
  • mto: This revision was merged to the branch mainline in revision 1067.
  • Revision ID: osullivan.padraig@gmail.com-20090617193927-sdsgtvbw3mz8dgrq
Added some doxygen comments. Added a new boolean variable to the
InfoSchemaClass to indicate whether optimizations specific to the fillTable
method which used to be called get_open_tables can be performed or not.

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Lines of Context:
drizzled/show.cc
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      /*if (session->lex->describe &&
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          (table_list->schema_table->fill_table != get_all_tables))
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        continue;*/
 
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      if (session->lex->describe &&
 
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          (table_list->schema_table->isOptimizationPossible() != true))
 
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      {
 
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        continue;
 
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      }
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      /*
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        If schema table is already processed and
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static InfoSchemaTable char_set_table("CHARACTER_SETS",
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                                      charsets_fields_info,
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                                      -1, -1, 0, 0,
 
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                                      -1, -1, false, false, 0,
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                                      &char_set_methods);
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static InfoSchemaTable collations_table("COLLATIONS",
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                                        collation_fields_info,
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                                        -1, -1, 0, 0,
 
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                                        -1, -1, false, false, 0,
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                                        &collations_methods);
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static InfoSchemaTable
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  coll_char_set_table("COLLATION_CHARACTER_SET_APPLICABILITY",
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                      coll_charset_app_fields_info,
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                      -1, -1, 0, 0,
 
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                      -1, -1, false, false, 0,
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                      &coll_char_methods);
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static InfoSchemaTable columns_table("COLUMNS",
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                                     columns_fields_info,
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                                     1, 2, 0, OPTIMIZE_I_S_TABLE,
 
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                                     1, 2, false, true, OPTIMIZE_I_S_TABLE,
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                                     &columns_methods);
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static InfoSchemaTable global_stat_table("GLOBAL_STATUS",
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                                         variables_fields_info,
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                                         -1, -1, 0, 0,
 
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                                         -1, -1, false, false, 0,
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                                         &status_methods);
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static InfoSchemaTable global_var_table("GLOBAL_VARIABLES",
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                                        variables_fields_info,
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                                        -1, -1, 0, 0,
 
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                                        -1, -1, false, false, 0,
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                                        &variables_methods);
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static InfoSchemaTable key_col_usage_table("KEY_COLUMN_USAGE",
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                                           key_column_usage_fields_info,
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                                           4, 5, 0, OPEN_TABLE_ONLY,
 
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                                           4, 5, false, true, OPEN_TABLE_ONLY,
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                                           &key_col_usage_methods);
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static InfoSchemaTable open_tab_table("OPEN_TABLES",
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                                      open_tables_fields_info,
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                                      -1, -1, 1, 0,
 
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                                      -1, -1, true, false, 0,
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                                      &open_tables_methods);
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static InfoSchemaTable plugins_table("PLUGINS",
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                                     plugin_fields_info,
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                                     -1, -1, 0, 0,
 
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                                     -1, -1, false, false, 0,
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                                     &plugins_methods);
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static InfoSchemaTable process_list_table("PROCESSLIST",
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                                          processlist_fields_info,
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                                          -1, -1, 0, 0,
 
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                                          -1, -1, false, false, 0,
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                                          &processlist_methods);
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static InfoSchemaTable ref_constrain_table("REFERENTIAL_CONSTRAINTS",
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                                           referential_constraints_fields_info,
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                                           1, 9, 0, OPEN_TABLE_ONLY,
 
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                                           1, 9, false, true, OPEN_TABLE_ONLY,
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                                           &ref_constraints_methods);
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static InfoSchemaTable schemata_table("SCHEMATA",
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                                      schema_fields_info,
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                                      1, -1, 0, 0,
 
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                                      1, -1, false, false, 0,
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                                      &schemata_methods);
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static InfoSchemaTable sess_stat_table("SESSION_STATUS",
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                                       variables_fields_info,
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                                       -1, -1, 0, 0,
 
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                                       -1, -1, false, false, 0,
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                                       &status_methods);
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static InfoSchemaTable sess_var_table("SESSION_VARIABLES",
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                                      variables_fields_info,
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                                      -1, -1, 0, 0,
 
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                                      -1, -1, false, false, 0,
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                                      &variables_methods);
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static InfoSchemaTable stats_table("STATISTICS",
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                                   stat_fields_info,
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                                   1, 2, 0,
 
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                                   1, 2, false, true,
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                                   OPEN_TABLE_ONLY|OPTIMIZE_I_S_TABLE,
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                                   &stats_methods);
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static InfoSchemaTable status_table("STATUS",
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                                    variables_fields_info,
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                                    -1, -1, 1, 0,
 
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                                    -1, -1, true, false, 0,
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                                    &status_methods);
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static InfoSchemaTable tables_table("TABLES",
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                                    tables_fields_info,
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                                    1, 2, 0, OPTIMIZE_I_S_TABLE,
 
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                                    1, 2, false, true, OPTIMIZE_I_S_TABLE,
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                                    &tables_methods);
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static InfoSchemaTable tab_constrain_table("TABLE_CONSTRAINTS",
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                                           table_constraints_fields_info,
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                                           3, 4, 0, OPEN_TABLE_ONLY,
 
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                                           3, 4, false, true, OPEN_TABLE_ONLY,
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                                           &tab_constraints_methods);
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static InfoSchemaTable tab_names_table("TABLE_NAMES",
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                                       table_names_fields_info,
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                                       1, 2, 1, 0,
 
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                                       1, 2, true, true, 0,
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                                       &tab_names_methods);
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static InfoSchemaTable var_table("VARIABLES",
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                                 variables_fields_info,
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                                 -1, -1, 1, 0,
 
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                                 -1, -1, true, false, 0,
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                                 &variables_methods);
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/*