1 files changed, 349 insertions, 0 deletions
diff --git a/sql/sql_i_s.h b/sql/sql_i_s.h
new file mode 100644
index 00000000..263031ae
--- /dev/null
+++ b/sql/sql_i_s.h
@@ -0,0 +1,349 @@
+#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_CHARACTER_SET_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; }
+  decimal_digits_t decimal_precision() const
+  { return (decimal_digits_t) ((m_char_length / 100) % 100); }
+  decimal_digits_t decimal_scale() const
+  { return (decimal_digits_t) (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 Yes_or_empty: public Varchar
+{
+public:
+  Yes_or_empty(): Varchar(3) { }
+  static LEX_CSTRING value(bool val)
+  {
+    return val ? Lex_cstring(STRING_WITH_LEN("Yes")) :
+                 Lex_cstring();
+  }
+};
+
+
+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_CHARACTER_SET_NAME_SIZE) { }
+};
+
+
+class CLName: public Varchar
+{
+public:
+  CLName(): Varchar(MY_CS_COLLATION_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)
+   :ST_FIELD_INFO(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