Adding upstream version 1:10.11.6.upstream/1%10.11.6upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 180 insertions, 0 deletions

diff --git a/storage/csv/ha_tina.h b/storage/csv/ha_tina.h
new file mode 100644
index 00000000..04318344
--- /dev/null
+++ b/storage/csv/ha_tina.h
@@ -0,0 +1,180 @@
+/* Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
+
+   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 <sys/types.h>
+#include <sys/stat.h>
+#include <my_dir.h>
+#include "transparent_file.h"
+
+#define DEFAULT_CHAIN_LENGTH 512
+/*
+  Version for file format.
+  1 - Initial Version. That is, the version when the metafile was introduced.
+*/
+
+#define TINA_VERSION 1
+
+typedef struct st_tina_share {
+  char *table_name;
+  char data_file_name[FN_REFLEN];
+  uint table_name_length, use_count;
+  /*
+    Below flag is needed to make log tables work with concurrent insert.
+    For more details see comment to ha_tina::update_status.
+  */
+  my_bool is_log_table;
+  /*
+    Here we save the length of the file for readers. This is updated by
+    inserts, updates and deletes. The var is initialized along with the
+    share initialization.
+  */
+  my_off_t saved_data_file_length;
+  mysql_mutex_t mutex;
+  THR_LOCK lock;
+  bool update_file_opened;
+  bool tina_write_opened;
+  File meta_file;           /* Meta file we use */
+  File tina_write_filedes;  /* File handler for readers */
+  bool crashed;             /* Meta file is crashed */
+  ha_rows rows_recorded;    /* Number of rows in tables */
+  uint data_file_version;   /* Version of the data file used */
+} TINA_SHARE;
+
+struct tina_set {
+  my_off_t begin;
+  my_off_t end;
+};
+
+class ha_tina final : public handler
+{
+  THR_LOCK_DATA lock;      /* MySQL lock */
+  TINA_SHARE *share;       /* Shared lock info */
+  my_off_t current_position;  /* Current position in the file during a file scan */
+  my_off_t next_position;     /* Next position in the file scan */
+  my_off_t local_saved_data_file_length; /* save position for reads */
+  my_off_t temp_file_length;
+  uchar byte_buffer[IO_SIZE];
+  Transparent_file *file_buff;
+  File data_file;                   /* File handler for readers */
+  File update_temp_file;
+  String buffer;
+  /*
+    The chain contains "holes" in the file, occurred because of
+    deletes/updates. It is used in rnd_end() to get rid of them
+    in the end of the query.
+  */
+  tina_set chain_buffer[DEFAULT_CHAIN_LENGTH];
+  tina_set *chain;
+  tina_set *chain_ptr;
+  uchar chain_alloced;
+  uint32 chain_size;
+  uint local_data_file_version;  /* Saved version of the data file used */
+  bool records_is_known, found_end_of_file;
+  MEM_ROOT blobroot;
+
+private:
+  int curr_lock_type;
+
+  bool get_write_pos(my_off_t *end_pos, tina_set *closest_hole);
+  int open_update_temp_file_if_needed();
+  int init_tina_writer();
+  int init_data_file();
+
+public:
+  ha_tina(handlerton *hton, TABLE_SHARE *table_arg);
+  ~ha_tina()
+  {
+    if (chain_alloced)
+      my_free(chain);
+    if (file_buff)
+      delete file_buff;
+    free_root(&blobroot, MYF(0));
+  }
+  const char *index_type(uint inx) { return "NONE"; }
+  ulonglong table_flags() const
+  {
+    return (HA_NO_TRANSACTIONS | HA_REC_NOT_IN_SEQ | HA_NO_AUTO_INCREMENT |
+            HA_BINLOG_ROW_CAPABLE | HA_BINLOG_STMT_CAPABLE | HA_CAN_EXPORT |
+            HA_CAN_REPAIR | HA_SLOW_RND_POS);
+  }
+  ulong index_flags(uint idx, uint part, bool all_parts) const
+  {
+    /*
+      We will never have indexes so this will never be called(AKA we return
+      zero)
+    */
+    return 0;
+  }
+  uint max_record_length() const { return HA_MAX_REC_LENGTH; }
+  uint max_keys()          const { return 0; }
+  uint max_key_parts()     const { return 0; }
+  uint max_key_length()    const { return 0; }
+  /*
+     Called in test_quick_select to determine if indexes should be used.
+   */
+  virtual double scan_time() { return (double) (stats.records+stats.deleted) / 20.0+10; }
+  /* The next method will never be called */
+  virtual bool fast_key_read() { return 1;}
+  /* 
+    TODO: return actual upper bound of number of records in the table.
+    (e.g. save number of records seen on full table scan and/or use file size
+    as upper bound)
+  */
+  ha_rows estimate_rows_upper_bound() { return HA_POS_ERROR; }
+
+  int open(const char *name, int mode, uint open_options);
+  int close(void);
+  int write_row(const uchar * buf);
+  int update_row(const uchar * old_data, const uchar * new_data);
+  int delete_row(const uchar * buf);
+  int rnd_init(bool scan=1);
+  int rnd_next(uchar *buf);
+  int rnd_pos(uchar * buf, uchar *pos);
+  bool check_and_repair(THD *thd);
+  int check(THD* thd, HA_CHECK_OPT* check_opt);
+  bool is_crashed() const;
+  int rnd_end();
+  int repair(THD* thd, HA_CHECK_OPT* check_opt);
+  /* This is required for SQL layer to know that we support autorepair */
+  bool auto_repair(int error) const
+  { return error == HA_ERR_CRASHED_ON_USAGE; }
+  bool auto_repair() const { return 1; }
+  void position(const uchar *record);
+  int info(uint);
+  int reset();
+  int extra(enum ha_extra_function operation);
+  int delete_all_rows(void);
+  int create(const char *name, TABLE *form, HA_CREATE_INFO *create_info);
+  bool check_if_incompatible_data(HA_CREATE_INFO *info,
+                                  uint table_changes);
+
+  int external_lock(THD *thd, int lock_type);
+
+  THR_LOCK_DATA **store_lock(THD *thd, THR_LOCK_DATA **to,
+      enum thr_lock_type lock_type);
+
+  /*
+    These functions used to get/update status of the handler.
+    Needed to enable concurrent inserts.
+  */
+  void get_status();
+  void update_status();
+
+  /* The following methods were added just for TINA */
+  int encode_quote(const uchar *buf);
+  int find_current_row(uchar *buf);
+  int chain_append();
+};
+