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Diffstat (limited to 'sql/sql_i_s.h')
-rw-r--r-- | sql/sql_i_s.h | 327 |
1 files changed, 327 insertions, 0 deletions
diff --git a/sql/sql_i_s.h b/sql/sql_i_s.h new file mode 100644 index 00000000000..4ca669a5610 --- /dev/null +++ b/sql/sql_i_s.h @@ -0,0 +1,327 @@ +#ifndef SQL_I_S_INCLUDED +#define SQL_I_S_INCLUDED +/* Copyright (c) 2000, 2017, Oracle and/or its affiliates. + Copyright (c) 2009, 2019, 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 */ + +#include "sql_const.h" // MAX_FIELD_VARCHARLENGTH +#include "sql_basic_types.h" // enum_nullability +#include "sql_string.h" // strlen, MY_CS_NAME_SIZE +#include "lex_string.h" // LEX_CSTRING +#include "mysql_com.h" // enum_field_types +#include "my_time.h" // TIME_SECOND_PART_DIGITS +#include "sql_type.h" // Type_handler_xxx + +struct TABLE_LIST; +struct TABLE; +typedef class Item COND; + +#ifdef MYSQL_CLIENT +#error MYSQL_CLIENT must not be defined +#endif // MYSQL_CLIENT + + +bool schema_table_store_record(THD *thd, TABLE *table); +COND *make_cond_for_info_schema(THD *thd, COND *cond, TABLE_LIST *table); + + +enum enum_show_open_table +{ + SKIP_OPEN_TABLE= 0U, // do not open table + OPEN_FRM_ONLY= 1U, // open FRM file only + OPEN_FULL_TABLE= 2U // open FRM,MYD, MYI files +}; + + +namespace Show { +class Type +{ + /** + This denotes data type for the column. For the most part, there seems to + be one entry in the enum for each SQL data type, although there seem to + be a number of additional entries in the enum. + */ + const Type_handler *m_type_handler; + /** + For string-type columns, this is the maximum number of + characters. Otherwise, it is the 'display-length' for the column. + */ + uint m_char_length; + uint m_unsigned_flag; + const Typelib *m_typelib; +public: + Type(const Type_handler *th, uint length, uint unsigned_flag, + const Typelib *typelib= NULL) + :m_type_handler(th), m_char_length(length), m_unsigned_flag(unsigned_flag), + m_typelib(typelib) + { } + const Type_handler *type_handler() const { return m_type_handler; } + uint char_length() const { return m_char_length; } + uint decimal_precision() const { return (m_char_length / 100) % 100; } + uint decimal_scale() const { return m_char_length % 10; } + uint fsp() const + { + DBUG_ASSERT(m_char_length <= TIME_SECOND_PART_DIGITS); + return m_char_length; + } + uint unsigned_flag() const { return m_unsigned_flag; } + const Typelib *typelib() const { return m_typelib; } +}; +} // namespace Show + + + +class ST_FIELD_INFO: public Show::Type +{ +protected: + LEX_CSTRING m_name; // I_S column name + enum_nullability m_nullability; // NULLABLE or NOT NULL + LEX_CSTRING m_old_name; // SHOW column name + enum_show_open_table m_open_method; +public: + ST_FIELD_INFO(const LEX_CSTRING &name, const Type &type, + enum_nullability nullability, + LEX_CSTRING &old_name, + enum_show_open_table open_method) + :Type(type), m_name(name), m_nullability(nullability), m_old_name(old_name), + m_open_method(open_method) + { } + ST_FIELD_INFO(const char *name, const Type &type, + enum_nullability nullability, + const char *old_name, + enum_show_open_table open_method) + :Type(type), m_nullability(nullability), m_open_method(open_method) + { + m_name.str= name; + m_name.length= safe_strlen(name); + m_old_name.str= old_name; + m_old_name.length= safe_strlen(old_name); + } + const LEX_CSTRING &name() const { return m_name; } + bool nullable() const { return m_nullability == NULLABLE; } + const LEX_CSTRING &old_name() const { return m_old_name; } + enum_show_open_table open_method() const { return m_open_method; } + bool end_marker() const { return m_name.str == NULL; } +}; + + +namespace Show +{ + + +class Enum: public Type +{ +public: + Enum(const Typelib *typelib) :Type(&type_handler_enum, 0, false, typelib) { } +}; + + +class Blob: public Type +{ +public: + Blob(uint length) :Type(&type_handler_blob, length, false) { } +}; + + +class Varchar: public Type +{ +public: + Varchar(uint length) :Type(&type_handler_varchar, length, false) + { + DBUG_ASSERT(length * 3 <= MAX_FIELD_VARCHARLENGTH); + } +}; + + +class Longtext: public Type +{ +public: + Longtext(uint length) :Type(&type_handler_varchar, length, false) { } +}; + + +class Yesno: public Varchar +{ +public: + Yesno(): Varchar(3) { } +}; + + +class Catalog: public Varchar +{ +public: + Catalog(): Varchar(FN_REFLEN) { } +}; + + +class Name: public Varchar +{ +public: + Name(): Varchar(NAME_CHAR_LEN) { } +}; + + +class Definer: public Varchar +{ +public: + Definer(): Varchar(DEFINER_CHAR_LENGTH) { } +}; + + +class Userhost: public Varchar +{ +public: + Userhost(): Varchar(USERNAME_CHAR_LENGTH + HOSTNAME_LENGTH + 2) { } +}; + + +class CSName: public Varchar +{ +public: + CSName(): Varchar(MY_CS_NAME_SIZE) { } +}; + + +class SQLMode: public Varchar +{ +public: + SQLMode(): Varchar(32*256) { } +}; + + +class Datetime: public Type +{ +public: + Datetime(uint dec) :Type(&type_handler_datetime2, dec, false) { } +}; + + +class Decimal: public Type +{ +public: + Decimal(uint length) :Type(&type_handler_newdecimal, length, false) { } +}; + + +class ULonglong: public Type +{ +public: + ULonglong(uint length) :Type(&type_handler_ulonglong, length, true) { } + ULonglong() :ULonglong(MY_INT64_NUM_DECIMAL_DIGITS) { } +}; + + +class ULong: public Type +{ +public: + ULong(uint length) :Type(&type_handler_ulong, length, true) { } + ULong() :ULong(MY_INT32_NUM_DECIMAL_DIGITS) { } +}; + + +class SLonglong: public Type +{ +public: + SLonglong(uint length) :Type(&type_handler_slonglong, length, false) { } + SLonglong() :SLonglong(MY_INT64_NUM_DECIMAL_DIGITS) { } +}; + + +class SLong: public Type +{ +public: + SLong(uint length) :Type(&type_handler_slong, length, false) { } + SLong() :SLong(MY_INT32_NUM_DECIMAL_DIGITS) { } +}; + + +class SShort: public Type +{ +public: + SShort(uint length) :Type(&type_handler_sshort, length, false) { } +}; + + +class STiny: public Type +{ +public: + STiny(uint length) :Type(&type_handler_stiny, length, false) { } +}; + + +class Double: public Type +{ +public: + Double(uint length) :Type(&type_handler_double, length, false) { } +}; + + +class Float: public Type +{ +public: + Float(uint length) :Type(&type_handler_float, length, false) { } +}; + + + +class Column: public ST_FIELD_INFO +{ +public: + Column(const char *name, const Type &type, enum_nullability nullability, + const char *old_name, + enum_show_open_table open_method= SKIP_OPEN_TABLE) + :ST_FIELD_INFO(name, type, nullability, old_name, open_method) + { } + Column(const char *name, const Type &type, enum_nullability nullability, + enum_show_open_table open_method= SKIP_OPEN_TABLE) + :Column(name, type, nullability, NullS, open_method) + { } +}; + + +// End marker +class CEnd: public Column +{ +public: + CEnd() :Column(NullS, Varchar(0), NOT_NULL, NullS, SKIP_OPEN_TABLE) { } +}; + + +} // namespace Show + + +struct TABLE_LIST; +typedef class Item COND; + +typedef struct st_schema_table +{ + const char *table_name; + ST_FIELD_INFO *fields_info; + /* for FLUSH table_name */ + int (*reset_table) (); + /* Fill table with data */ + int (*fill_table) (THD *thd, TABLE_LIST *tables, COND *cond); + /* Handle fileds for old SHOW */ + int (*old_format) (THD *thd, struct st_schema_table *schema_table); + int (*process_table) (THD *thd, TABLE_LIST *tables, TABLE *table, + bool res, const LEX_CSTRING *db_name, + const LEX_CSTRING *table_name); + int idx_field1, idx_field2; + bool hidden; + uint i_s_requested_object; /* the object we need to open(TABLE | VIEW) */ +} ST_SCHEMA_TABLE; + + +#endif // SQL_I_S_INCLUDED |