parse_tree_partitions.h

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/* Copyright (c) 2016, 2023, Oracle and/or its affiliates.
 
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License, version 2.0,
   as published by the Free Software Foundation.
 
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   as designated in a particular file or component or in included license
   documentation.  The authors of MySQL hereby grant you an additional
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   separately licensed software that they have included with MySQL.
 
   This program is distributed in the hope that it will be useful,
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License, version 2.0, for more details.
 
   You should have received a copy of the GNU General Public License
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   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */
 
#ifndef PARSE_TREE_PARTITIONS_INCLUDED
#define PARSE_TREE_PARTITIONS_INCLUDED
 
#include <sys/types.h>  // TODO: replace with cstdint
 
#include "lex_string.h"
#include "my_base.h"
#include "my_inttypes.h"  // TODO: replace with cstdint
#include "sql/parse_location.h"
#include "sql/parse_tree_helpers.h"
#include "sql/parse_tree_node_base.h"
#include "sql/partition_element.h"
#include "sql/partition_info.h"
 
class Item;
class THD;
 
template <class T>
class List;
 
template <typename Element_type>
class Mem_root_array;
 
/**
  Parse context for partitioning-specific parse tree nodes.
 
  For internal use in the contextualization code.
 
  @ingroup ptn_partitioning
*/
struct Partition_parse_context : public Parse_context,
                                 public Parser_partition_info {
  Partition_parse_context(THD *const thd, partition_info *part_info,
                          partition_element *current_partition,
                          partition_element *curr_part_elem,
                          bool is_add_or_reorganize_partition);
 
  Partition_parse_context(THD *thd_arg, partition_info *part_info_arg,
                          bool is_add_or_reorganize_partition)
      : Partition_parse_context(thd_arg, part_info_arg, nullptr, nullptr,
                                is_add_or_reorganize_partition) {}
 
  /**
    True for "ALTER TABLE ADD PARTITION" and "ALTER TABLE REORGANIZE PARTITION"
    statements, otherwise false.
  */
  const bool is_add_or_reorganize_partition;
};
 
/**
  Base class for all Partition_parse_context-dependent nodes
 
  @ingroup ptn_partitioning
*/
typedef Parse_tree_node_tmpl<Partition_parse_context> Parse_tree_part_node;
 
/**
  Base class for all partition options
 
  @ingroup ptn_part_options
*/
class PT_partition_option : public Parse_tree_part_node {
 protected:
  explicit PT_partition_option(const POS &pos) : Parse_tree_part_node(pos) {}
};
 
/**
  Node for the @SQL{COMMENT [=] @<string@>} partition option
 
  @ingroup ptn_part_options
*/
class PT_partition_comment : public PT_partition_option {
  typedef PT_partition_option super;
 
  char *comment;
 
 public:
  explicit PT_partition_comment(const POS &pos, char *comment)
      : super(pos), comment(comment) {}
 
  bool do_contextualize(Partition_parse_context *pc) override {
    if (super::do_contextualize(pc)) return true;
 
    pc->curr_part_elem->part_comment = comment;
    return false;
  }
};
 
/**
  Node for the @SQL{INDEX DIRECTORY [=] @<string@>} partition option
 
  @ingroup ptn_part_options
*/
class PT_partition_index_directory : public PT_partition_option {
  typedef PT_partition_option super;
 
  const char *index_directory;
 
 public:
  explicit PT_partition_index_directory(const POS &pos,
                                        const char *index_directory)
      : super(pos), index_directory(index_directory) {}
 
  bool do_contextualize(Partition_parse_context *pc) override {
    if (super::do_contextualize(pc)) return true;
 
    pc->curr_part_elem->index_file_name = index_directory;
    return false;
  }
};
 
/**
  Node for the @SQL{DATA DIRECTORY [=] @<string@>} partition option
 
  @ingroup ptn_part_options
*/
class PT_partition_data_directory : public PT_partition_option {
  typedef PT_partition_option super;
 
  const char *data_directory;
 
 public:
  explicit PT_partition_data_directory(const POS &pos,
                                       const char *data_directory)
      : super(pos), data_directory(data_directory) {}
 
  bool do_contextualize(Partition_parse_context *pc) override {
    if (super::do_contextualize(pc)) return true;
 
    pc->curr_part_elem->data_file_name = data_directory;
    return false;
  }
};
 
/**
  Node for the @SQL{MIN_ROWS [=] @<integer@>} partition option
 
  @ingroup ptn_part_options
*/
class PT_partition_min_rows : public PT_partition_option {
  typedef PT_partition_option super;
 
  ha_rows min_rows;
 
 public:
  explicit PT_partition_min_rows(const POS &pos, ha_rows min_rows)
      : super(pos), min_rows(min_rows) {}
 
  bool do_contextualize(Partition_parse_context *pc) override {
    if (super::do_contextualize(pc)) return true;
 
    pc->curr_part_elem->part_min_rows = min_rows;
    return false;
  }
};
 
/**
  Node for the @SQL{MAX_ROWS [=] @<integer@>} partition option
 
  @ingroup ptn_part_options
*/
class PT_partition_max_rows : public PT_partition_option {
  typedef PT_partition_option super;
 
  ha_rows max_rows;
 
 public:
  explicit PT_partition_max_rows(const POS &pos, ha_rows max_rows)
      : super(pos), max_rows(max_rows) {}
 
  bool do_contextualize(Partition_parse_context *pc) override {
    if (super::do_contextualize(pc)) return true;
 
    pc->curr_part_elem->part_max_rows = max_rows;
    return false;
  }
};
 
/**
  Node for the @SQL{NODEGROUP [=] @<integer@>} partition option
 
  @ingroup ptn_part_options
*/
class PT_partition_nodegroup : public PT_partition_option {
  typedef PT_partition_option super;
 
  uint16 nodegroup;
 
 public:
  explicit PT_partition_nodegroup(const POS &pos, uint16 nodegroup)
      : super(pos), nodegroup(nodegroup) {}
 
  bool do_contextualize(Partition_parse_context *pc) override {
    if (super::do_contextualize(pc)) return true;
 
    pc->curr_part_elem->nodegroup_id = nodegroup;
    return false;
  }
};
 
/**
  Node for the @SQL{[STORAGE] ENGINE [=] @<identifier|string@>} partition option
 
  @ingroup ptn_part_options
*/
class PT_partition_engine : public PT_partition_option {
  typedef PT_partition_option super;
 
 public:
  const LEX_CSTRING name;
 
  explicit PT_partition_engine(const POS &pos, const LEX_CSTRING &name)
      : super(pos), name(name) {}
 
  bool do_contextualize(Partition_parse_context *pc) override {
    if (super::do_contextualize(pc)) return true;
 
    return resolve_engine(pc->thd, name, false,  // partition can't be temporary
                          false, &pc->curr_part_elem->engine_type);
  }
};
 
/**
  Node for the @SQL{TABLESPACE [=] @<identifier@>} partition option
 
  @ingroup ptn_part_options
*/
class PT_partition_tablespace : public PT_partition_option {
  typedef PT_partition_option super;
 
  const char *tablespace;
 
 public:
  explicit PT_partition_tablespace(const POS &pos, const char *tablespace)
      : super(pos), tablespace(tablespace) {}
 
  bool do_contextualize(Partition_parse_context *pc) override {
    if (super::do_contextualize(pc)) return true;
 
    pc->curr_part_elem->tablespace_name = tablespace;
    return false;
  }
};
 
/**
  Node for the @SQL{SUBRAPTITION} clause of @SQL{CREATE/ALTER TABLE}
 
  @ingroup ptn_partitioning
*/
class PT_subpartition : public Parse_tree_part_node {
  const POS m_errpos;
  const char *name;
  const Mem_root_array<PT_partition_option *> *options;
 
 public:
  PT_subpartition(const POS &pos, const POS &errpos, const char *name,
                  Mem_root_array<PT_partition_option *> *options)
      : Parse_tree_part_node(pos),
        m_errpos(errpos),
        name(name),
        options(options) {}
 
  bool do_contextualize(Partition_parse_context *pc) override;
};
 
/**
  Base class for partition value nodes: @SQL{MAX_VALUE} values or expressions
 
  @ingroup ptn_partitioning
*/
class PT_part_value_item : public Parse_tree_part_node {
 protected:
  explicit PT_part_value_item(const POS &pos) : Parse_tree_part_node(pos) {}
};
 
/**
  Node for the @SQL{MAX_VALUE} partition value in @SQL{CREATE/ALTER TABLE}
 
  @ingroup ptn_partitioning
*/
class PT_part_value_item_max : public PT_part_value_item {
  typedef PT_part_value_item super;
 
 public:
  explicit PT_part_value_item_max(const POS &pos) : super(pos) {}
 
  bool do_contextualize(Partition_parse_context *pc) override;
};
 
/**
  Node for the partitioning expression in @SQL{CREATE/ALTER TABLE}
 
  @ingroup ptn_partitioning
*/
class PT_part_value_item_expr : public PT_part_value_item {
  typedef PT_part_value_item super;
 
  Item *expr;
 
 public:
  explicit PT_part_value_item_expr(const POS &pos, Item *expr)
      : super(pos), expr(expr) {}
 
  bool do_contextualize(Partition_parse_context *pc) override;
};
 
/**
  Base class for @SQL{VALUES} partitioning clauses
 
  @ingroup ptn_partitioning
*/
class PT_part_values : public Parse_tree_part_node {
 protected:
  explicit PT_part_values(const POS &pos) : Parse_tree_part_node(pos) {}
};
 
/**
  Node for a list of partitioning values in @SQL{VALUES} clauses
 
  @ingroup ptn_partitioning
*/
class PT_part_value_item_list_paren : public PT_part_values {
  typedef PT_part_values super;
 
  Mem_root_array<PT_part_value_item *> *values;
  const POS paren_pos;
 
 public:
  explicit PT_part_value_item_list_paren(
      const POS &pos, Mem_root_array<PT_part_value_item *> *values,
      const POS &paren_pos)
      : super(pos), values(values), paren_pos(paren_pos) {}
 
  bool do_contextualize(Partition_parse_context *pc) override;
};
 
/**
  Node for a list of partitioning values in the @SQL{VALUES IN} clause
 
  @ingroup ptn_partitioning
*/
class PT_part_values_in_item : public PT_part_values {
  typedef PT_part_values super;
 
  const POS m_errpos;
  PT_part_value_item_list_paren *item;
 
 public:
  explicit PT_part_values_in_item(const POS &pos, const POS &errpos,
                                  PT_part_value_item_list_paren *item)
      : super(pos), m_errpos(errpos), item(item) {}
 
  bool do_contextualize(Partition_parse_context *pc) override;
};
 
/**
  Node for a list of partitioning values in the @SQL{VALUES IN} clause
 
  @ingroup ptn_partitioning
*/
class PT_part_values_in_list : public PT_part_values {
  typedef PT_part_values super;
 
  const POS m_errpos;
  Mem_root_array<PT_part_value_item_list_paren *> *list;
 
 public:
  explicit PT_part_values_in_list(
      const POS &pos, const POS &errpos,
      Mem_root_array<PT_part_value_item_list_paren *> *list)
      : super(pos), m_errpos(errpos), list(list) {}
 
  bool do_contextualize(Partition_parse_context *pc) override;
};
 
/**
  Node for the @SQL{PARTITION} clause of CREATE/ALTER TABLE
 
  @ingroup ptn_partitioning
*/
class PT_part_definition : public Parse_tree_part_node {
  typedef Parse_tree_part_node super;
 
  const POS m_errpos;
  const LEX_STRING name;
  partition_type type;
  PT_part_values *const opt_part_values;
  const POS values_pos;
  Mem_root_array<PT_partition_option *> *opt_part_options;
  Mem_root_array<PT_subpartition *> *opt_sub_partitions;
  const POS sub_partitions_pos;
 
 public:
  PT_part_definition(const POS &pos, const POS &errpos, const LEX_STRING &name,
                     partition_type type, PT_part_values *const opt_part_values,
                     const POS &values_pos,
                     Mem_root_array<PT_partition_option *> *opt_part_options,
                     Mem_root_array<PT_subpartition *> *opt_sub_partitions,
                     const POS &sub_partitions_pos)
      : super(pos),
        m_errpos(errpos),
        name(name),
        type(type),
        opt_part_values(opt_part_values),
        values_pos(values_pos),
        opt_part_options(opt_part_options),
        opt_sub_partitions(opt_sub_partitions),
        sub_partitions_pos(sub_partitions_pos) {}
 
  bool do_contextualize(Partition_parse_context *pc) override;
};
 
/**
  Base class for all subpartitioning clause nodes
 
  @ingroup ptn_partitioning
*/
class PT_sub_partition : public Parse_tree_part_node {
 protected:
  explicit PT_sub_partition(const POS &pos) : Parse_tree_part_node(pos) {}
};
 
/**
  Node for the @SQL{SUBRAPTITION BY HASH} definition clause
 
  @ingroup ptn_partitioning
*/
class PT_sub_partition_by_hash : public PT_sub_partition {
  typedef PT_sub_partition super;
 
  const bool is_linear;
  const POS hash_pos;
  Item *hash;
  const uint opt_num_subparts;
 
 public:
  PT_sub_partition_by_hash(const POS &pos, bool is_linear, const POS &hash_pos,
                           Item *hash, uint opt_num_subparts)
      : super(pos),
        is_linear(is_linear),
        hash_pos(hash_pos),
        hash(hash),
        opt_num_subparts(opt_num_subparts) {}
 
  bool do_contextualize(Partition_parse_context *pc) override;
};
 
/**
  Node for the @SQL{SUBRAPTITION BY KEY} definition clause
 
  @ingroup ptn_partitioning
*/
class PT_sub_partition_by_key : public PT_sub_partition {
  typedef PT_sub_partition super;
 
  const bool is_linear;
  enum_key_algorithm key_algo;
  List<char> *field_names;
  const uint opt_num_subparts;
 
 public:
  PT_sub_partition_by_key(const POS &pos, bool is_linear,
                          enum_key_algorithm key_algo, List<char> *field_names,
                          const uint opt_num_subparts)
      : super(pos),
        is_linear(is_linear),
        key_algo(key_algo),
        field_names(field_names),
        opt_num_subparts(opt_num_subparts) {}
 
  bool do_contextualize(Partition_parse_context *pc) override;
};
 
class PT_part_type_def : public Parse_tree_part_node {
 protected:
  explicit PT_part_type_def(const POS &pos) : Parse_tree_part_node(pos) {}
 
  bool set_part_field_list(Partition_parse_context *pc, List<char> *list);
 
  bool itemize_part_expr(Partition_parse_context *pc, const POS &pos,
                         Item **item);
};
 
/**
  Node for the @SQL{PARTITION BY [LINEAR] KEY} type clause
 
  @ingroup ptn_partitioning
*/
class PT_part_type_def_key : public PT_part_type_def {
  typedef PT_part_type_def super;
 
  const bool is_linear;
  const enum_key_algorithm key_algo;
  List<char> *const opt_columns;
 
 public:
  PT_part_type_def_key(const POS &pos, bool is_linear,
                       enum_key_algorithm key_algo, List<char> *opt_columns)
      : super(pos),
        is_linear(is_linear),
        key_algo(key_algo),
        opt_columns(opt_columns) {}
 
  bool do_contextualize(Partition_parse_context *pc) override;
};
 
/**
  Node for the @SQL{PARTITION BY [LINEAR] HASH} type clause
 
  @ingroup ptn_partitioning
*/
class PT_part_type_def_hash : public PT_part_type_def {
  typedef PT_part_type_def super;
 
  const bool is_linear;
  const POS expr_pos;
  Item *expr;
 
 public:
  PT_part_type_def_hash(const POS &pos, bool is_linear, const POS &expr_pos,
                        Item *expr)
      : super(pos), is_linear(is_linear), expr_pos(expr_pos), expr(expr) {}
 
  bool do_contextualize(Partition_parse_context *pc) override;
};
 
/**
  Node for the @SQL{PARTITION BY RANGE (@<expression@>) } type clause
 
  @ingroup ptn_partitioning
*/
class PT_part_type_def_range_expr : public PT_part_type_def {
  typedef PT_part_type_def super;
 
  const POS expr_pos;
  Item *expr;
 
 public:
  PT_part_type_def_range_expr(const POS &pos, const POS &expr_pos, Item *expr)
      : super(pos), expr_pos(expr_pos), expr(expr) {}
 
  bool do_contextualize(Partition_parse_context *pc) override;
};
 
/**
  Node for the @SQL{PARTITION BY RANGE COLUMNS (@<ident list@>) } type clause
 
  @ingroup ptn_partitioning
*/
class PT_part_type_def_range_columns : public PT_part_type_def {
  typedef PT_part_type_def super;
 
  List<char> *const columns;
 
 public:
  explicit PT_part_type_def_range_columns(const POS &pos, List<char> *columns)
      : super(pos), columns(columns) {}
 
  bool do_contextualize(Partition_parse_context *pc) override;
};
 
/**
  Node for the @SQL{PARTITION BY LIST (@<expression@>) } type clause
 
  @ingroup ptn_partitioning
*/
class PT_part_type_def_list_expr : public PT_part_type_def {
  typedef PT_part_type_def super;
 
  const POS expr_pos;
  Item *expr;
 
 public:
  PT_part_type_def_list_expr(const POS &pos, const POS &expr_pos, Item *expr)
      : super(pos), expr_pos(expr_pos), expr(expr) {}
 
  bool do_contextualize(Partition_parse_context *pc) override;
};
 
/**
  Node for the @SQL{PARTITION BY LIST COLUMNS (@<ident list@>) } type clause
 
  @ingroup ptn_partitioning
*/
class PT_part_type_def_list_columns : public PT_part_type_def {
  typedef PT_part_type_def super;
 
  List<char> *const columns;
 
 public:
  explicit PT_part_type_def_list_columns(const POS &pos, List<char> *columns)
      : super(pos), columns(columns) {}
 
  bool do_contextualize(Partition_parse_context *pc) override;
};
 
/**
  Node for the @SQL{PARTITION} definition clause
 
  @ingroup ptn_partitioning
*/
class PT_partition : public Parse_tree_node {
  typedef Parse_tree_node super;
 
  PT_part_type_def *const part_type_def;
  const uint opt_num_parts;
  PT_sub_partition *const opt_sub_part;
  const POS part_defs_pos;
  Mem_root_array<PT_part_definition *> *part_defs;
 
 public:
  partition_info part_info;
 
 public:
  PT_partition(const POS &pos, PT_part_type_def *part_type_def,
               uint opt_num_parts, PT_sub_partition *opt_sub_part,
               const POS &part_defs_pos,
               Mem_root_array<PT_part_definition *> *part_defs)
      : super(pos),
        part_type_def(part_type_def),
        opt_num_parts(opt_num_parts),
        opt_sub_part(opt_sub_part),
        part_defs_pos(part_defs_pos),
        part_defs(part_defs) {}
 
  bool do_contextualize(Parse_context *pc) override;
};
 
#endif /* PARSE_TREE_PARTITIONS_INCLUDED */