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