Adding upstream version 1:10.5.12.upstream/1%10.5.12upstream

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

1 files changed, 551 insertions, 0 deletions

diff --git a/sql/partition_info.h b/sql/partition_info.h
new file mode 100644
index 00000000..0656238e
--- /dev/null
+++ b/sql/partition_info.h
@@ -0,0 +1,551 @@
+#ifndef PARTITION_INFO_INCLUDED
+#define PARTITION_INFO_INCLUDED
+
+/* Copyright (c) 2006, 2010, 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 */
+
+#ifdef USE_PRAGMA_INTERFACE
+#pragma interface			/* gcc class implementation */
+#endif
+
+#include "sql_class.h"
+#include "partition_element.h"
+#include "sql_partition.h"
+
+class partition_info;
+struct TABLE_LIST;
+/* Some function typedefs */
+typedef int (*get_part_id_func)(partition_info *part_info, uint32 *part_id,
+                                 longlong *func_value);
+typedef int (*get_subpart_id_func)(partition_info *part_info, uint32 *part_id);
+typedef bool (*check_constants_func)(THD *thd, partition_info *part_info);
+ 
+struct st_ddl_log_memory_entry;
+
+#define MAX_PART_NAME_SIZE 8
+
+
+struct Vers_part_info : public Sql_alloc
+{
+  Vers_part_info() :
+    limit(0),
+    now_part(NULL),
+    hist_part(NULL)
+  {
+    interval.type= INTERVAL_LAST;
+  }
+  Vers_part_info(Vers_part_info &src) :
+    interval(src.interval),
+    limit(src.limit),
+    now_part(NULL),
+    hist_part(NULL)
+  {
+  }
+  bool initialized()
+  {
+    if (now_part)
+    {
+      DBUG_ASSERT(now_part->id != UINT_MAX32);
+      DBUG_ASSERT(now_part->type == partition_element::CURRENT);
+      if (hist_part)
+      {
+        DBUG_ASSERT(hist_part->id != UINT_MAX32);
+        DBUG_ASSERT(hist_part->type == partition_element::HISTORY);
+      }
+      return true;
+    }
+    return false;
+  }
+  struct {
+    my_time_t start;
+    INTERVAL step;
+    enum interval_type type;
+    bool is_set() { return type < INTERVAL_LAST; }
+  } interval;
+  ulonglong limit;
+  partition_element *now_part;
+  partition_element *hist_part;
+};
+
+class partition_info : public Sql_alloc
+{
+public:
+  /*
+   * Here comes a set of definitions needed for partitioned table handlers.
+   */
+  List<partition_element> partitions;
+  List<partition_element> temp_partitions;
+
+  List<const char> part_field_list;
+  List<const char> subpart_field_list;
+  
+  /* 
+    If there is no subpartitioning, use only this func to get partition ids.
+    If there is subpartitioning, use the this func to get partition id when
+    you have both partition and subpartition fields.
+  */
+  get_part_id_func get_partition_id;
+
+  /* Get partition id when we don't have subpartition fields */
+  get_part_id_func get_part_partition_id;
+
+  /* 
+    Get subpartition id when we have don't have partition fields by we do
+    have subpartition ids.
+    Mikael said that for given constant tuple 
+    {subpart_field1, ..., subpart_fieldN} the subpartition id will be the
+    same in all subpartitions
+  */
+  get_subpart_id_func get_subpartition_id;
+
+  /*
+    When we have various string fields we might need some preparation
+    before and clean-up after calling the get_part_id_func's. We need
+    one such method for get_part_partition_id and one for
+    get_subpartition_id.
+  */
+  get_part_id_func get_part_partition_id_charset;
+  get_subpart_id_func get_subpartition_id_charset;
+
+  check_constants_func check_constants;
+
+  /* NULL-terminated array of fields used in partitioned expression */
+  Field **part_field_array;
+  Field **subpart_field_array;
+  Field **part_charset_field_array;
+  Field **subpart_charset_field_array;
+  /* 
+    Array of all fields used in partition and subpartition expression,
+    without duplicates, NULL-terminated.
+  */
+  Field **full_part_field_array;
+  /*
+    Set of all fields used in partition and subpartition expression.
+    Required for testing of partition fields in write_set when
+    updating. We need to set all bits in read_set because the row may
+    need to be inserted in a different [sub]partition.
+  */
+  MY_BITMAP full_part_field_set;
+
+  /*
+    When we have a field that requires transformation before calling the
+    partition functions we must allocate field buffers for the field of
+    the fields in the partition function.
+  */
+  uchar **part_field_buffers;
+  uchar **subpart_field_buffers;
+  uchar **restore_part_field_ptrs;
+  uchar **restore_subpart_field_ptrs;
+
+  Item *part_expr;
+  Item *subpart_expr;
+
+  Item *item_free_list;
+
+  struct st_ddl_log_memory_entry *first_log_entry;
+  struct st_ddl_log_memory_entry *exec_log_entry;
+  struct st_ddl_log_memory_entry *frm_log_entry;
+
+  /* 
+    Bitmaps of partitions used by the current query. 
+    * read_partitions  - partitions to be used for reading.
+    * lock_partitions  - partitions that must be locked (read or write).
+    Usually read_partitions is the same set as lock_partitions, but
+    in case of UPDATE the WHERE clause can limit the read_partitions set,
+    but not neccesarily the lock_partitions set.
+    Usage pattern:
+    * Initialized in ha_partition::open().
+    * read+lock_partitions is set  according to explicit PARTITION,
+      WL#5217, in open_and_lock_tables().
+    * Bits in read_partitions can be cleared in prune_partitions()
+      in the optimizing step.
+      (WL#4443 is about allowing prune_partitions() to affect lock_partitions
+      and be done before locking too).
+    * When the partition enabled handler get an external_lock call it locks
+      all partitions in lock_partitions (and remembers which partitions it
+      locked, so that it can unlock them later). In case of LOCK TABLES it will
+      lock all partitions, and keep them locked while lock_partitions can
+      change for each statement under LOCK TABLES.
+    * Freed at the same time item_free_list is freed.
+  */
+  MY_BITMAP read_partitions;
+  MY_BITMAP lock_partitions;
+  bool bitmaps_are_initialized;
+
+  union {
+    longlong *range_int_array;
+    LIST_PART_ENTRY *list_array;
+    part_column_list_val *range_col_array;
+    part_column_list_val *list_col_array;
+  };
+
+  Vers_part_info *vers_info;
+  
+  /********************************************
+   * INTERVAL ANALYSIS
+   ********************************************/
+  /*
+    Partitioning interval analysis function for partitioning, or NULL if 
+    interval analysis is not supported for this kind of partitioning.
+  */
+  get_partitions_in_range_iter get_part_iter_for_interval;
+  /*
+    Partitioning interval analysis function for subpartitioning, or NULL if
+    interval analysis is not supported for this kind of partitioning.
+  */
+  get_partitions_in_range_iter get_subpart_iter_for_interval;
+  
+  /********************************************
+   * INTERVAL ANALYSIS ENDS 
+   ********************************************/
+
+  longlong err_value;
+  char* part_info_string;
+
+  partition_element *curr_part_elem;     // part or sub part
+  partition_element *current_partition;  // partition
+  part_elem_value *curr_list_val;
+  uint curr_list_object;
+  uint num_columns;
+
+  TABLE *table;
+  /*
+    These key_map's are used for Partitioning to enable quick decisions
+    on whether we can derive more information about which partition to
+    scan just by looking at what index is used.
+  */
+  key_map all_fields_in_PF, all_fields_in_PPF, all_fields_in_SPF;
+  key_map some_fields_in_PF;
+
+  handlerton *default_engine_type;
+  partition_type part_type;
+  partition_type subpart_type;
+
+  uint part_info_len;
+
+  uint num_parts;
+  uint num_subparts;
+  uint count_curr_subparts;                  // used during parsing
+
+  uint num_list_values;
+
+  uint num_part_fields;
+  uint num_subpart_fields;
+  uint num_full_part_fields;
+
+  uint has_null_part_id;
+  uint32 default_partition_id;
+  /*
+    This variable is used to calculate the partition id when using
+    LINEAR KEY/HASH. This functionality is kept in the MySQL Server
+    but mainly of use to handlers supporting partitioning.
+  */
+  uint16 linear_hash_mask;
+  /*
+    PARTITION BY KEY ALGORITHM=N
+    Which algorithm to use for hashing the fields.
+    N = 1 - Use 5.1 hashing (numeric fields are hashed as binary)
+    N = 2 - Use 5.5 hashing (numeric fields are hashed like latin1 bytes)
+  */
+  enum enum_key_algorithm
+    {
+      KEY_ALGORITHM_NONE= 0,
+      KEY_ALGORITHM_51= 1,
+      KEY_ALGORITHM_55= 2
+    };
+  enum_key_algorithm key_algorithm;
+
+  /* Only the number of partitions defined (uses default names and options). */
+  bool use_default_partitions;
+  bool use_default_num_partitions;
+  /* Only the number of subpartitions defined (uses default names etc.). */
+  bool use_default_subpartitions;
+  bool use_default_num_subpartitions;
+  bool default_partitions_setup;
+  bool defined_max_value;
+  inline bool has_default_partititon()
+  {
+    return (part_type == LIST_PARTITION && defined_max_value);
+  }
+  bool list_of_part_fields;                  // KEY or COLUMNS PARTITIONING
+  bool list_of_subpart_fields;               // KEY SUBPARTITIONING
+  bool linear_hash_ind;                      // LINEAR HASH/KEY
+  bool fixed;
+  bool is_auto_partitioned;
+  bool has_null_value;
+  bool column_list;                          // COLUMNS PARTITIONING, 5.5+
+
+  partition_info()
+  : get_partition_id(NULL), get_part_partition_id(NULL),
+    get_subpartition_id(NULL),
+    part_field_array(NULL), subpart_field_array(NULL),
+    part_charset_field_array(NULL),
+    subpart_charset_field_array(NULL),
+    full_part_field_array(NULL),
+    part_field_buffers(NULL), subpart_field_buffers(NULL),
+    restore_part_field_ptrs(NULL), restore_subpart_field_ptrs(NULL),
+    part_expr(NULL), subpart_expr(NULL), item_free_list(NULL),
+    first_log_entry(NULL), exec_log_entry(NULL), frm_log_entry(NULL),
+    bitmaps_are_initialized(FALSE),
+    list_array(NULL), vers_info(NULL), err_value(0),
+    part_info_string(NULL),
+    curr_part_elem(NULL), current_partition(NULL),
+    curr_list_object(0), num_columns(0), table(NULL),
+    default_engine_type(NULL),
+    part_type(NOT_A_PARTITION), subpart_type(NOT_A_PARTITION),
+    part_info_len(0),
+    num_parts(0), num_subparts(0),
+    count_curr_subparts(0),
+    num_list_values(0), num_part_fields(0), num_subpart_fields(0),
+    num_full_part_fields(0), has_null_part_id(0), linear_hash_mask(0),
+    key_algorithm(KEY_ALGORITHM_NONE),
+    use_default_partitions(TRUE), use_default_num_partitions(TRUE),
+    use_default_subpartitions(TRUE), use_default_num_subpartitions(TRUE),
+    default_partitions_setup(FALSE), defined_max_value(FALSE),
+    list_of_part_fields(FALSE), list_of_subpart_fields(FALSE),
+    linear_hash_ind(FALSE), fixed(FALSE),
+    is_auto_partitioned(FALSE),
+    has_null_value(FALSE), column_list(FALSE)
+  {
+    all_fields_in_PF.clear_all();
+    all_fields_in_PPF.clear_all();
+    all_fields_in_SPF.clear_all();
+    some_fields_in_PF.clear_all();
+    partitions.empty();
+    temp_partitions.empty();
+    part_field_list.empty();
+    subpart_field_list.empty();
+  }
+  ~partition_info() {}
+
+  partition_info *get_clone(THD *thd);
+  bool set_named_partition_bitmap(const char *part_name, size_t length);
+  bool set_partition_bitmaps(List<String> *partition_names);
+  bool set_partition_bitmaps_from_table(TABLE_LIST *table_list);
+  /* Answers the question if subpartitioning is used for a certain table */
+  bool is_sub_partitioned()
+  {
+    return (subpart_type == NOT_A_PARTITION ?  FALSE : TRUE);
+  }
+
+  /* Returns the total number of partitions on the leaf level */
+  uint get_tot_partitions()
+  {
+    return num_parts * (is_sub_partitioned() ? num_subparts : 1);
+  }
+
+  bool set_up_defaults_for_partitioning(THD *thd, handler *file,
+                                        HA_CREATE_INFO *info,
+                                        uint start_no);
+  const char *find_duplicate_field();
+  char *find_duplicate_name();
+  bool check_engine_mix(handlerton *engine_type, bool default_engine);
+  bool check_partition_info(THD *thd, handlerton **eng_type,
+                            handler *file, HA_CREATE_INFO *info,
+                            partition_info *add_or_reorg_part= NULL);
+  void print_no_partition_found(TABLE *table, myf errflag);
+  void print_debug(const char *str, uint*);
+  Item* get_column_item(Item *item, Field *field);
+  int fix_partition_values(THD *thd,
+                           part_elem_value *val,
+                           partition_element *part_elem);
+  bool fix_column_value_functions(THD *thd,
+                                  part_elem_value *val,
+                                  uint part_id);
+  bool fix_parser_data(THD *thd);
+  int add_max_value(THD *thd);
+  void init_col_val(part_column_list_val *col_val, Item *item);
+  int reorganize_into_single_field_col_val(THD *thd);
+  part_column_list_val *add_column_value(THD *thd);
+  bool set_part_expr(THD *thd, Item *item_ptr, bool is_subpart);
+  bool set_up_charset_field_preps(THD *thd);
+  bool check_partition_field_length();
+  bool init_column_part(THD *thd);
+  bool add_column_list_value(THD *thd, Item *item);
+  partition_element *get_part_elem(const char *partition_name, char *file_name,
+                                   size_t file_name_size, uint32 *part_id);
+  void report_part_expr_error(bool use_subpart_expr);
+  bool has_same_partitioning(partition_info *new_part_info);
+  bool error_if_requires_values() const;
+private:
+  bool set_up_default_partitions(THD *thd, handler *file, HA_CREATE_INFO *info,
+                                 uint start_no);
+  bool set_up_default_subpartitions(THD *thd, handler *file,
+                                    HA_CREATE_INFO *info);
+  char *create_default_partition_names(THD *thd, uint part_no, uint num_parts,
+                                       uint start_no);
+  char *create_default_subpartition_name(THD *thd, uint subpart_no,
+                                         const char *part_name);
+  bool prune_partition_bitmaps(List<String> *partition_names); // set_read_partitions() in 8.0
+  bool add_named_partition(const char *part_name, size_t length);
+public:
+  bool has_unique_name(partition_element *element);
+  bool field_in_partition_expr(Field *field) const;
+
+  bool vers_init_info(THD *thd);
+  bool vers_set_interval(THD *thd, Item *interval,
+                         interval_type int_type, Item *starts,
+                         const char *table_name);
+  bool vers_set_limit(ulonglong limit)
+  {
+    DBUG_ASSERT(part_type == VERSIONING_PARTITION);
+    vers_info->limit= limit;
+    return !limit;
+  }
+  void vers_set_hist_part(THD *thd);
+  bool vers_fix_field_list(THD *thd);
+  void vers_update_el_ids();
+  partition_element *get_partition(uint part_id)
+  {
+    List_iterator<partition_element> it(partitions);
+    partition_element *el;
+    while ((el= it++))
+    {
+      if (el->id == part_id)
+        return el;
+    }
+    return NULL;
+  }
+  uint next_part_no(uint new_parts) const;
+};
+
+uint32 get_next_partition_id_range(struct st_partition_iter* part_iter);
+bool check_partition_dirs(partition_info *part_info);
+
+/* Initialize the iterator to return a single partition with given part_id */
+
+static inline void init_single_partition_iterator(uint32 part_id,
+                                           PARTITION_ITERATOR *part_iter)
+{
+  part_iter->part_nums.start= part_iter->part_nums.cur= part_id;
+  part_iter->part_nums.end= part_id+1;
+  part_iter->ret_null_part= part_iter->ret_null_part_orig= FALSE;
+  part_iter->ret_default_part= part_iter->ret_default_part_orig= FALSE;
+  part_iter->get_next= get_next_partition_id_range;
+}
+
+/* Initialize the iterator to enumerate all partitions */
+static inline
+void init_all_partitions_iterator(partition_info *part_info,
+                                  PARTITION_ITERATOR *part_iter)
+{
+  part_iter->part_nums.start= part_iter->part_nums.cur= 0;
+  part_iter->part_nums.end= part_info->num_parts;
+  part_iter->ret_null_part= part_iter->ret_null_part_orig= FALSE;
+  part_iter->ret_default_part= part_iter->ret_default_part_orig= FALSE;
+  part_iter->get_next= get_next_partition_id_range;
+}
+
+
+/**
+  @brief Update part_field_list by row_end field name
+
+  @returns true on error; false on success
+*/
+inline
+bool partition_info::vers_fix_field_list(THD * thd)
+{
+  if (!table->versioned())
+  {
+    // frm must be corrupted, normally CREATE/ALTER TABLE checks for that
+    my_error(ER_FILE_CORRUPT, MYF(0), table->s->path.str);
+    return true;
+  }
+  DBUG_ASSERT(part_type == VERSIONING_PARTITION);
+  DBUG_ASSERT(table->versioned(VERS_TIMESTAMP));
+
+  Field *row_end= table->vers_end_field();
+  // needed in handle_list_of_fields()
+  row_end->flags|= GET_FIXED_FIELDS_FLAG;
+  Name_resolution_context *context= &thd->lex->current_select->context;
+  Item *row_end_item= new (thd->mem_root) Item_field(thd, context, row_end);
+  Item *row_end_ts= new (thd->mem_root) Item_func_unix_timestamp(thd, row_end_item);
+  set_part_expr(thd, row_end_ts, false);
+
+  return false;
+}
+
+
+/**
+  @brief Update partition_element's id
+
+  @returns true on error; false on success
+*/
+inline
+void partition_info::vers_update_el_ids()
+{
+  DBUG_ASSERT(part_type == VERSIONING_PARTITION);
+  DBUG_ASSERT(table->versioned(VERS_TIMESTAMP));
+
+  List_iterator<partition_element> it(partitions);
+  partition_element *el;
+  for(uint32 id= 0; ((el= it++)); id++)
+  {
+    DBUG_ASSERT(el->type != partition_element::CONVENTIONAL);
+    /* Newly added element is inserted before AS_OF_NOW. */
+    if (el->id == UINT_MAX32 || el->type == partition_element::CURRENT)
+    {
+      el->id= id;
+      if (el->type == partition_element::CURRENT)
+        break;
+    }
+  }
+}
+
+
+inline
+bool make_partition_name(char *move_ptr, uint i)
+{
+  int res= snprintf(move_ptr, MAX_PART_NAME_SIZE + 1, "p%u", i);
+  return res < 0 || res > MAX_PART_NAME_SIZE;
+}
+
+
+#ifdef WITH_PARTITION_STORAGE_ENGINE
+inline
+uint partition_info::next_part_no(uint new_parts) const
+{
+  if (part_type != VERSIONING_PARTITION)
+    return num_parts;
+  DBUG_ASSERT(new_parts > 0);
+  /* Choose first non-occupied name suffix */
+  uint32 suffix= num_parts - 1;
+  DBUG_ASSERT(suffix > 0);
+  char part_name[MAX_PART_NAME_SIZE + 1];
+  List_iterator_fast<partition_element> it(table->part_info->partitions);
+  for (uint cur_part= 0; cur_part < new_parts; ++cur_part, ++suffix)
+  {
+    uint32 cur_suffix= suffix;
+    if (make_partition_name(part_name, suffix))
+      return 0;
+    partition_element *el;
+    it.rewind();
+    while ((el= it++))
+    {
+      if (0 == my_strcasecmp(&my_charset_latin1, el->partition_name, part_name))
+      {
+        if (make_partition_name(part_name, ++suffix))
+          return 0;
+        it.rewind();
+      }
+    }
+    if (cur_part > 0 && suffix > cur_suffix)
+      cur_part= 0;
+  }
+  return suffix - new_parts;
+}
+#endif
+
+#endif /* PARTITION_INFO_INCLUDED */