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/* Copyright (c) 2005, 2010, Oracle and/or its affiliates. Copyright (c) 2012, 2016, MariaDB This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */ #ifndef SQL_SHOW_H #define SQL_SHOW_H #include "sql_list.h" /* List */ #include "handler.h" /* enum_schema_tables */ #include "table.h" /* enum_schema_table_state */ #include "my_apc.h" /* Forward declarations */ class JOIN; class String; class THD; class sp_name; struct TABLE_LIST; typedef class st_select_lex SELECT_LEX; struct LEX; typedef struct st_mysql_show_var SHOW_VAR; typedef struct st_schema_table ST_SCHEMA_TABLE; struct TABLE; typedef struct system_status_var STATUS_VAR; /* Used by handlers to store things in schema tables */ #define IS_FILES_FILE_ID 0 #define IS_FILES_FILE_NAME 1 #define IS_FILES_FILE_TYPE 2 #define IS_FILES_TABLESPACE_NAME 3 #define IS_FILES_TABLE_CATALOG 4 #define IS_FILES_TABLE_SCHEMA 5 #define IS_FILES_TABLE_NAME 6 #define IS_FILES_LOGFILE_GROUP_NAME 7 #define IS_FILES_LOGFILE_GROUP_NUMBER 8 #define IS_FILES_ENGINE 9 #define IS_FILES_FULLTEXT_KEYS 10 #define IS_FILES_DELETED_ROWS 11 #define IS_FILES_UPDATE_COUNT 12 #define IS_FILES_FREE_EXTENTS 13 #define IS_FILES_TOTAL_EXTENTS 14 #define IS_FILES_EXTENT_SIZE 15 #define IS_FILES_INITIAL_SIZE 16 #define IS_FILES_MAXIMUM_SIZE 17 #define IS_FILES_AUTOEXTEND_SIZE 18 #define IS_FILES_CREATION_TIME 19 #define IS_FILES_LAST_UPDATE_TIME 20 #define IS_FILES_LAST_ACCESS_TIME 21 #define IS_FILES_RECOVER_TIME 22 #define IS_FILES_TRANSACTION_COUNTER 23 #define IS_FILES_VERSION 24 #define IS_FILES_ROW_FORMAT 25 #define IS_FILES_TABLE_ROWS 26 #define IS_FILES_AVG_ROW_LENGTH 27 #define IS_FILES_DATA_LENGTH 28 #define IS_FILES_MAX_DATA_LENGTH 29 #define IS_FILES_INDEX_LENGTH 30 #define IS_FILES_DATA_FREE 31 #define IS_FILES_CREATE_TIME 32 #define IS_FILES_UPDATE_TIME 33 #define IS_FILES_CHECK_TIME 34 #define IS_FILES_CHECKSUM 35 #define IS_FILES_STATUS 36 #define IS_FILES_EXTRA 37 typedef enum { WITHOUT_DB_NAME, WITH_DB_NAME } enum_with_db_name; int get_all_tables(THD *thd, TABLE_LIST *tables, COND *cond); int show_create_table(THD *thd, TABLE_LIST *table_list, String *packet, Table_specification_st *create_info_arg, enum_with_db_name with_db_name); int show_create_table_ex(THD *thd, TABLE_LIST *table_list, const char * forced_db, const char *forced_name, String *packet, Table_specification_st *create_info_arg, enum_with_db_name with_db_name); int copy_event_to_schema_table(THD *thd, TABLE *sch_table, TABLE *event_table); bool append_identifier(THD *thd, String *packet, const char *name, size_t length); static inline bool append_identifier(THD *thd, String *packet, const LEX_CSTRING *name) { return append_identifier(thd, packet, name->str, name->length); } void mysqld_list_fields(THD *thd,TABLE_LIST *table, const char *wild); int mysqld_dump_create_info(THD *thd, TABLE_LIST *table_list, int fd); bool mysqld_show_create_get_fields(THD *thd, TABLE_LIST *table_list, List<Item> *field_list, String *buffer); bool mysqld_show_create(THD *thd, TABLE_LIST *table_list); void mysqld_show_create_db_get_fields(THD *thd, List<Item> *field_list); bool mysqld_show_create_db(THD *thd, LEX_CSTRING *db_name, LEX_CSTRING *orig_db_name, const DDL_options_st &options); void mysqld_list_processes(THD *thd,const char *user,bool verbose); int mysqld_show_status(THD *thd); int mysqld_show_variables(THD *thd,const char *wild); bool mysqld_show_storage_engines(THD *thd); bool mysqld_show_authors(THD *thd); bool mysqld_show_contributors(THD *thd); bool mysqld_show_privileges(THD *thd); char *make_backup_log_name(char *buff, const char *name, const char* log_ext); uint calc_sum_of_all_status(STATUS_VAR *to); bool append_definer(THD *thd, String *buffer, const LEX_CSTRING *definer_user, const LEX_CSTRING *definer_host); int add_status_vars(SHOW_VAR *list); void remove_status_vars(SHOW_VAR *list); ulonglong get_status_vars_version(void); void init_status_vars(); void free_status_vars(); void reset_status_vars(); bool show_create_trigger(THD *thd, const sp_name *trg_name); void view_store_options(THD *thd, TABLE_LIST *table, String *buff); void init_fill_schema_files_row(TABLE* table); void initialize_information_schema_acl(); ST_SCHEMA_TABLE *find_schema_table(THD *thd, const LEX_CSTRING *table_name, bool *in_plugin); static inline ST_SCHEMA_TABLE *find_schema_table(THD *thd, const LEX_CSTRING *table_name) { bool unused; return find_schema_table(thd, table_name, &unused); } ST_SCHEMA_TABLE *get_schema_table(enum enum_schema_tables schema_table_idx); int make_schema_select(THD *thd, SELECT_LEX *sel, ST_SCHEMA_TABLE *schema_table); int mysql_schema_table(THD *thd, LEX *lex, TABLE_LIST *table_list); bool get_schema_tables_result(JOIN *join, enum enum_schema_table_state executed_place); enum enum_schema_tables get_schema_table_idx(ST_SCHEMA_TABLE *schema_table); TABLE *create_schema_table(THD *thd, TABLE_LIST *table_list); const char* get_one_variable(THD *thd, const SHOW_VAR *variable, enum_var_type value_type, SHOW_TYPE show_type, system_status_var *status_var, const CHARSET_INFO **charset, char *buff, size_t *length); /* These functions were under INNODB_COMPATIBILITY_HOOKS */ int get_quote_char_for_identifier(THD *thd, const char *name, size_t length); THD *find_thread_by_id(longlong id, bool query_id= false); class select_result_explain_buffer; /* SHOW EXPLAIN request object. */ class Show_explain_request : public Apc_target::Apc_call { public: THD *target_thd; /* thd that we're running SHOW EXPLAIN for */ THD *request_thd; /* thd that run SHOW EXPLAIN command */ /* If true, there was some error when producing EXPLAIN output. */ bool failed_to_produce; /* SHOW EXPLAIN will be stored here */ select_result_explain_buffer *explain_buf; /* Query that we've got SHOW EXPLAIN for */ String query_str; /* Overloaded virtual function */ void call_in_target_thread() override; }; /** Condition pushdown used for INFORMATION_SCHEMA / SHOW queries. This structure is to implement an optimization when accessing data dictionary data in the INFORMATION_SCHEMA or SHOW commands. When the query contain a TABLE_SCHEMA or TABLE_NAME clause, narrow the search for data based on the constraints given. */ typedef struct st_lookup_field_values { /** Value of a TABLE_SCHEMA clause. Note that this value length may exceed @c NAME_LEN. @sa wild_db_value */ LEX_CSTRING db_value; /** Value of a TABLE_NAME clause. Note that this value length may exceed @c NAME_LEN. @sa wild_table_value */ LEX_CSTRING table_value; /** True when @c db_value is a LIKE clause, false when @c db_value is an '=' clause. */ bool wild_db_value; /** True when @c table_value is a LIKE clause, false when @c table_value is an '=' clause. */ bool wild_table_value; } LOOKUP_FIELD_VALUES; /* INFORMATION_SCHEMA: Execution plan for get_all_tables() call */ class IS_table_read_plan : public Sql_alloc { public: IS_table_read_plan() : no_rows(false), trivial_show_command(FALSE) {} bool no_rows; /* For EXPLAIN only: For SHOW KEYS and SHOW COLUMNS, we know which db_name.table_name will be read, however for some reason we don't set the fields in this->lookup_field_vals. In order to not have JOIN::save_explain_data() walking over uninitialized data, we set trivial_show_command=true. */ bool trivial_show_command; LOOKUP_FIELD_VALUES lookup_field_vals; Item *partial_cond; bool has_db_lookup_value() { return (lookup_field_vals.db_value.length && !lookup_field_vals.wild_db_value); } bool has_table_lookup_value() { return (lookup_field_vals.table_value.length && !lookup_field_vals.wild_table_value); } }; bool optimize_schema_tables_reads(JOIN *join); bool optimize_schema_tables_memory_usage(List<TABLE_LIST> &tables); /* Handle the ignored database directories list for SHOW/I_S. */ bool ignore_db_dirs_init(); void ignore_db_dirs_free(); void ignore_db_dirs_reset(); bool ignore_db_dirs_process_additions(); bool push_ignored_db_dir(const char *path); extern char *opt_ignore_db_dirs; #endif /* SQL_SHOW_H */
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