row0ins.h

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/** @file include/row0ins.h
 Insert into a table
 
 Created 4/20/1996 Heikki Tuuri
 *******************************************************/
 
#ifndef row0ins_h
#define row0ins_h
 
#include "data0data.h"
#include "dict0types.h"
#include "que0types.h"
#include "row0types.h"
#include "trx0types.h"
#include "univ.i"
 
/** Checks if foreign key constraint fails for an index entry. Sets shared locks
 which lock either the success or the failure of the constraint. NOTE that
 the caller must have a shared latch on dict_foreign_key_check_lock.
 @return DB_SUCCESS, DB_LOCK_WAIT, DB_NO_REFERENCED_ROW, or
 DB_ROW_IS_REFERENCED */
[[nodiscard]] dberr_t row_ins_check_foreign_constraint(
    bool check_ref,          /*!< in: true If we want to check that
                            the referenced table is ok, false if we
                            want to check the foreign key table */
    dict_foreign_t *foreign, /*!< in: foreign constraint; NOTE that the
                             tables mentioned in it must be in the
                             dictionary cache if they exist at all */
    dict_table_t *table,     /*!< in: if check_ref is true, then the foreign
                             table, else the referenced table */
    dtuple_t *entry,         /*!< in: index entry for index */
    que_thr_t *thr);         /*!< in: query thread */
/** Creates an insert node struct.
 @return own: insert node struct */
ins_node_t *ins_node_create(
    ulint ins_type,      /*!< in: INS_VALUES, ... */
    dict_table_t *table, /*!< in: table where to insert */
    mem_heap_t *heap);   /*!< in: mem heap where created */
/** Sets a new row to insert for an INS_DIRECT node. This function is only used
 if we have constructed the row separately, which is a rare case; this
 function is quite slow. */
void ins_node_set_new_row(
    ins_node_t *node, /*!< in: insert node */
    dtuple_t *row);   /*!< in: new row (or first row) for the node */
/** Tries to insert an entry into a clustered index, ignoring foreign key
constraints. If a record with the same unique key is found, the other
record is necessarily marked deleted by a committed transaction, or a
unique key violation error occurs. The delete marked record is then
updated to an existing record, and we must write an undo log record on
the delete marked record.
@param[in] flags Undo logging and locking flags.
@param[in] mode BTR_MODIFY_LEAF or BTR_MODIFY_TREE, depending on whether we wish
optimistic or pessimistic descent down the index tree.
@param[in] index Clustered index.
@param[in] n_uniq 0 or index->n_uniq.
@param[in] entry Index entry to insert.
@param[in] thr Query thread, or nullptr if flags & (BTR_NO_LOCKING_FLAG |
BTR_NO_UNDO_LOG_FLAG) and a duplicate can't occur.
@param[in] dup_chk_only If true, just do duplicate check and return. don't
execute actual insert.
@retval DB_SUCCESS on success
@retval DB_LOCK_WAIT on lock wait when !(flags & BTR_NO_LOCKING_FLAG)
@retval DB_FAIL if retry with BTR_MODIFY_TREE is needed
@return error code */
[[nodiscard]] dberr_t row_ins_clust_index_entry_low(
    uint32_t flags, ulint mode, dict_index_t *index, ulint n_uniq,
    dtuple_t *entry, que_thr_t *thr, bool dup_chk_only);
 
/** Tries to insert an entry into a secondary index. If a record with exactly
the same fields is found, the other record is necessarily marked deleted.
It is then unmarked. Otherwise, the entry is just inserted to the index.
@param[in]      flags           undo logging and locking flags
@param[in]      mode            BTR_MODIFY_LEAF or BTR_MODIFY_TREE,
                                depending on whether we wish optimistic or
                                pessimistic descent down the index tree
@param[in]      index           secondary index
@param[in,out]  offsets_heap    memory heap that can be emptied
@param[in,out]  heap            memory heap
@param[in,out]  entry           index entry to insert
@param[in]      trx_id          PAGE_MAX_TRX_ID during row_log_table_apply(),
                                or trx_id when undo log is disabled during
                                alter copy operation or 0
@param[in]      thr             query thread
@param[in]      dup_chk_only    true, just do duplicate check and return.
                                don't execute actual insert
@retval DB_SUCCESS on success
@retval DB_LOCK_WAIT on lock wait when !(flags & BTR_NO_LOCKING_FLAG)
@retval DB_FAIL if retry with BTR_MODIFY_TREE is needed
@return error code */
[[nodiscard]] dberr_t row_ins_sec_index_entry_low(
    uint32_t flags, ulint mode, dict_index_t *index, mem_heap_t *offsets_heap,
    mem_heap_t *heap, dtuple_t *entry, trx_id_t trx_id, que_thr_t *thr,
    bool dup_chk_only);
 
/** Sets the values of the dtuple fields in entry from the values of appropriate
columns in row.
@param[in]      index   index handler
@param[out]     entry   index entry to make
@param[in]      row     row
@return DB_SUCCESS if the set is successful */
dberr_t row_ins_index_entry_set_vals(const dict_index_t *index, dtuple_t *entry,
                                     const dtuple_t *row);
 
/** Inserts an entry into a clustered index. Tries first optimistic,
 then pessimistic descent down the tree. If the entry matches enough
 to a delete marked record, performs the insert by updating or delete
 unmarking the delete marked record.
 @return DB_SUCCESS, DB_LOCK_WAIT, DB_DUPLICATE_KEY, or some other error code */
[[nodiscard]] dberr_t row_ins_clust_index_entry(
    dict_index_t *index, /*!< in: clustered index */
    dtuple_t *entry,     /*!< in/out: index entry to insert */
    que_thr_t *thr,      /*!< in: query thread */
    bool dup_chk_only);
/*!< in: if true, just do duplicate check
and return. don't execute actual insert. */
/** Inserts an entry into a secondary index. Tries first optimistic,
 then pessimistic descent down the tree. If the entry matches enough
 to a delete marked record, performs the insert by updating or delete
 unmarking the delete marked record.
 @return DB_SUCCESS, DB_LOCK_WAIT, DB_DUPLICATE_KEY, or some other error code */
[[nodiscard]] dberr_t row_ins_sec_index_entry(
    dict_index_t *index, /*!< in: secondary index */
    dtuple_t *entry,     /*!< in/out: index entry to insert */
    que_thr_t *thr,      /*!< in: query thread */
    bool dup_chk_only);
/*!< in: if true, just do duplicate check
and return. don't execute actual insert. */
/** Inserts a row to a table. This is a high-level function used in
 SQL execution graphs.
 @return query thread to run next or NULL */
que_thr_t *row_ins_step(que_thr_t *thr); /*!< in: query thread */
 
/* Insert node structure */
 
struct ins_node_t {
  que_common_t common;     /*!< node type: QUE_NODE_INSERT */
  ulint ins_type;          /* INS_VALUES, INS_SEARCHED, or INS_DIRECT */
  dtuple_t *row;           /*!< row to insert */
  dict_table_t *table;     /*!< table where to insert */
  sel_node_t *select;      /*!< select in searched insert */
  que_node_t *values_list; /* list of expressions to evaluate and
                       insert in an INS_VALUES insert */
  ulint state;             /*!< node execution state */
  dict_index_t *index;     /*!< NULL, or the next index where the index
                           entry should be inserted */
  dtuple_t *entry;         /*!< NULL, or entry to insert in the index;
                           after a successful insert of the entry,
                           this should be reset to NULL */
  UT_LIST_BASE_NODE_T(dtuple_t, tuple_list)
  entry_list;       /* list of entries, one for each index */
  byte *row_id_buf; /* buffer for the row id sys field in row */
  trx_id_t trx_id;  /*!< trx id or the last trx which executed the
                    node */
  byte *trx_id_buf; /* buffer for the trx id sys field in row */
  mem_heap_t *entry_sys_heap;
  /* memory heap used as auxiliary storage;
  entry_list and sys fields are stored here;
  if this is NULL, entry list should be created
  and buffers for sys fields in row allocated */
 
  /** When there is a lock wait error, this remembers current position of
  the multi-value field, before which the values have been inserted */
  uint32_t ins_multi_val_pos;
 
  ulint magic_n;
};
 
constexpr uint32_t INS_NODE_MAGIC_N = 15849075;
 
/* Insert node types */
/** INSERT INTO ... SELECT ... */
constexpr uint32_t INS_SEARCHED = 0;
/** INSERT INTO ... VALUES ... */
constexpr uint32_t INS_VALUES = 1;
/** this is for internal use in dict0crea: insert the row directly */
constexpr uint32_t INS_DIRECT = 2;
 
/* Node execution states */
/** we should set an IX lock on table */
constexpr uint32_t INS_NODE_SET_IX_LOCK = 1;
/** row id should be allocated */
constexpr uint32_t INS_NODE_ALLOC_ROW_ID = 2;
/** index entries should be built and inserted */
constexpr uint32_t INS_NODE_INSERT_ENTRIES = 3;
 
#endif