Exemplo n.º 1
0
void
row_upd_clust_index_replace_new_col_vals(
/*=====================================*/
	dtuple_t*	entry,	/* in/out: index entry where replaced */
	upd_t*		update)	/* in: update vector */
{
	upd_field_t*	upd_field;
	dfield_t*	dfield;
	dfield_t*	new_val;
	ulint		field_no;
	ulint		i;

	dtuple_set_info_bits(entry, update->info_bits);

	for (i = 0; i < upd_get_n_fields(update); i++) {

		upd_field = upd_get_nth_field(update, i);

		field_no = upd_field->field_no;

		dfield = dtuple_get_nth_field(entry, field_no);

		new_val = &(upd_field->new_val);

		dfield_set_data(dfield, new_val->data, new_val->len);
	}
}
Exemplo n.º 2
0
dtuple_t*
row_rec_to_index_entry(
/*===================*/
				/* out, own: index entry built; see the
				NOTE below! */
	ulint		type,	/* in: ROW_COPY_DATA, or ROW_COPY_POINTERS:
				the former copies also the data fields to
				heap as the latter only places pointers to
				data fields on the index page */
	dict_index_t*	index,	/* in: index */
	rec_t*		rec,	/* in: record in the index;
				NOTE: in the case ROW_COPY_POINTERS
				the data fields in the row will point
				directly into this record, therefore,
				the buffer page of this record must be
				at least s-latched and the latch held
				as long as the dtuple is used! */
	mem_heap_t*	heap)	/* in: memory heap from which the memory
				needed is allocated */
{
	dtuple_t*	entry;
	dfield_t*	dfield;
	ulint		i;
	byte*		field;
	ulint		len;
	ulint		rec_len;
	byte*		buf;
	
	ut_ad(rec && heap && index);
	
	if (type == ROW_COPY_DATA) {
		/* Take a copy of rec to heap */
		buf = mem_heap_alloc(heap, rec_get_size(rec));
		rec = rec_copy(buf, rec);
	}

	rec_len = rec_get_n_fields(rec);
	
	entry = dtuple_create(heap, rec_len);

	dtuple_set_n_fields_cmp(entry,
				dict_index_get_n_unique_in_tree(index));
	ut_ad(rec_len == dict_index_get_n_fields(index));

	dict_index_copy_types(entry, index, rec_len);

	dtuple_set_info_bits(entry, rec_get_info_bits(rec));

	for (i = 0; i < rec_len; i++) {

		dfield = dtuple_get_nth_field(entry, i);
		field = rec_get_nth_field(rec, i, &len);

		dfield_set_data(dfield, field, len);
	}

	ut_ad(dtuple_check_typed(entry));

	return(entry);
}
Exemplo n.º 3
0
void
rec_copy_prefix_to_dtuple(
/*======================*/
	dtuple_t*	tuple,		/* in: data tuple */
	rec_t*		rec,		/* in: physical record */
	ulint		n_fields,	/* in: number of fields to copy */
	mem_heap_t*	heap)		/* in: memory heap */
{
	dfield_t*	field;
	byte*		data;
	ulint		len;
	byte*		buf = NULL;
	ulint		i;
	
	ut_ad(rec_validate(rec));	
	ut_ad(dtuple_check_typed(tuple));

	dtuple_set_info_bits(tuple, rec_get_info_bits(rec));

	for (i = 0; i < n_fields; i++) {

		field = dtuple_get_nth_field(tuple, i);
		data = rec_get_nth_field(rec, i, &len);

		if (len != UNIV_SQL_NULL) {
			buf = mem_heap_alloc(heap, len);

			ut_memcpy(buf, data, len);
		}

		dfield_set_data(field, buf, len);
	}
}
Exemplo n.º 4
0
/*******************************************************************//**
Converts an index record to a typed data tuple. NOTE that externally
stored (often big) fields are NOT copied to heap.
@return	own: index entry built; see the NOTE below! */
UNIV_INTERN
dtuple_t*
row_rec_to_index_entry(
/*===================*/
	ulint			type,	/*!< in: ROW_COPY_DATA, or
					ROW_COPY_POINTERS: the former
					copies also the data fields to
					heap as the latter only places
					pointers to data fields on the
					index page */
	const rec_t*		rec,	/*!< in: record in the index;
					NOTE: in the case
					ROW_COPY_POINTERS the data
					fields in the row will point
					directly into this record,
					therefore, the buffer page of
					this record must be at least
					s-latched and the latch held
					as long as the dtuple is used! */
	const dict_index_t*	index,	/*!< in: index */
	ulint*			offsets,/*!< in/out: rec_get_offsets(rec) */
	ulint*			n_ext,	/*!< out: number of externally
					stored columns */
	mem_heap_t*		heap)	/*!< in: memory heap from which
					the memory needed is allocated */
{
	dtuple_t*	entry;
	byte*		buf;

	ut_ad(rec && heap && index);
	ut_ad(rec_offs_validate(rec, index, offsets));

	if (type == ROW_COPY_DATA) {
		/* Take a copy of rec to heap */
		buf = mem_heap_alloc(heap, rec_offs_size(offsets));
		rec = rec_copy(buf, rec, offsets);
		/* Avoid a debug assertion in rec_offs_validate(). */
		rec_offs_make_valid(rec, index, offsets);
#if defined UNIV_DEBUG || defined UNIV_BLOB_LIGHT_DEBUG
	} else {
		ut_a(!rec_offs_any_null_extern(rec, offsets));
#endif /* UNIV_DEBUG || UNIV_BLOB_LIGHT_DEBUG */
	}

	entry = row_rec_to_index_entry_low(rec, index, offsets, n_ext, heap);

	dtuple_set_info_bits(entry,
			     rec_get_info_bits(rec, rec_offs_comp(offsets)));

	return(entry);
}
Exemplo n.º 5
0
void
row_build_to_tuple(
/*===============*/
	dtuple_t*	row,	/* in/out: row built; see the NOTE below! */
	dict_index_t*	index,	/* in: clustered index */
	rec_t*		rec)	/* in: record in the clustered index;
				NOTE: the data fields in the row will point
				directly into this record, therefore,
				the buffer page of this record must be
				at least s-latched and the latch held
				as long as the row dtuple is used!
				NOTE 2: does not work with externally
				stored fields! */
{
	dict_table_t*	table;
	ulint		n_fields;
	ulint		i;
	dfield_t*	dfield;
	byte*		field;
	ulint		len;
	ulint		row_len;
	dict_col_t*	col;
	
	ut_ad(index && rec);
	ut_ad(index->type & DICT_CLUSTERED);

	table = index->table;
	row_len = dict_table_get_n_cols(table);

	dtuple_set_info_bits(row, rec_get_info_bits(rec));
	
	n_fields = dict_index_get_n_fields(index);

	ut_ad(n_fields == rec_get_n_fields(rec));

	dict_table_copy_types(row, table);

	for (i = 0; i < n_fields; i++) {

		col = dict_field_get_col(dict_index_get_nth_field(index, i));
		dfield = dtuple_get_nth_field(row, dict_col_get_no(col));
		field = rec_get_nth_field(rec, i, &len);

		dfield_set_data(dfield, field, len);
	}

	ut_ad(dtuple_check_typed(row));
}
Exemplo n.º 6
0
void
row_upd_index_replace_new_col_vals(
/*===============================*/
	dtuple_t*	entry,	/* in/out: index entry where replaced */
	dict_index_t*	index,	/* in: index; NOTE that may also be a
				non-clustered index */
	upd_t*		update)	/* in: update vector */
{
	upd_field_t*	upd_field;
	dfield_t*	dfield;
	dfield_t*	new_val;
	ulint		field_no;
	dict_index_t*	clust_index;
	ulint		i;

	ut_ad(index);

	clust_index = dict_table_get_first_index(index->table);

	dtuple_set_info_bits(entry, update->info_bits);

	for (i = 0; i < upd_get_n_fields(update); i++) {

		upd_field = upd_get_nth_field(update, i);

		field_no = dict_index_get_nth_col_pos(index,
				dict_index_get_nth_col_no(clust_index,
							upd_field->field_no));
		if (field_no != ULINT_UNDEFINED) {
			dfield = dtuple_get_nth_field(entry, field_no);

			new_val = &(upd_field->new_val);

			dfield_set_data(dfield, new_val->data, new_val->len);
		}
	}
}
Exemplo n.º 7
0
/*******************************************************************//**
An inverse function to row_build_index_entry. Builds a row from a
record in a clustered index.
@return	own: row built; see the NOTE below! */
UNIV_INTERN
dtuple_t*
row_build(
/*======*/
	ulint			type,	/*!< in: ROW_COPY_POINTERS or
					ROW_COPY_DATA; the latter
					copies also the data fields to
					heap while the first only
					places pointers to data fields
					on the index page, and thus is
					more efficient */
	const dict_index_t*	index,	/*!< in: clustered index */
	const rec_t*		rec,	/*!< in: record in the clustered
					index; NOTE: in the case
					ROW_COPY_POINTERS the data
					fields in the row will point
					directly into this record,
					therefore, the buffer page of
					this record must be at least
					s-latched and the latch held
					as long as the row dtuple is used! */
	const ulint*		offsets,/*!< in: rec_get_offsets(rec,index)
					or NULL, in which case this function
					will invoke rec_get_offsets() */
	const dict_table_t*	col_table,
					/*!< in: table, to check which
					externally stored columns
					occur in the ordering columns
					of an index, or NULL if
					index->table should be
					consulted instead */
	row_ext_t**		ext,	/*!< out, own: cache of
					externally stored column
					prefixes, or NULL */
	mem_heap_t*		heap)	/*!< in: memory heap from which
					the memory needed is allocated */
{
	dtuple_t*		row;
	const dict_table_t*	table;
	ulint			n_fields;
	ulint			n_ext_cols;
	ulint*			ext_cols	= NULL; /* remove warning */
	ulint			len;
	ulint			row_len;
	byte*			buf;
	ulint			i;
	ulint			j;
	mem_heap_t*		tmp_heap	= NULL;
	ulint			offsets_[REC_OFFS_NORMAL_SIZE];
	rec_offs_init(offsets_);

	ut_ad(index && rec && heap);
	ut_ad(dict_index_is_clust(index));
	ut_ad(!mutex_own(&kernel_mutex));

	if (!offsets) {
		offsets = rec_get_offsets(rec, index, offsets_,
					  ULINT_UNDEFINED, &tmp_heap);
	} else {
		ut_ad(rec_offs_validate(rec, index, offsets));
	}

#if defined UNIV_DEBUG || defined UNIV_BLOB_LIGHT_DEBUG
	if (rec_offs_any_null_extern(rec, offsets)) {
		/* This condition can occur during crash recovery
		before trx_rollback_active() has completed execution,
		or when a concurrently executing
		row_ins_index_entry_low() has committed the B-tree
		mini-transaction but has not yet managed to restore
		the cursor position for writing the big_rec. */
		ut_a(trx_undo_roll_ptr_is_insert(
			     row_get_rec_roll_ptr(rec, index, offsets)));
	}
#endif /* UNIV_DEBUG || UNIV_BLOB_LIGHT_DEBUG */

	if (type != ROW_COPY_POINTERS) {
		/* Take a copy of rec to heap */
		buf = mem_heap_alloc(heap, rec_offs_size(offsets));
		rec = rec_copy(buf, rec, offsets);
		/* Avoid a debug assertion in rec_offs_validate(). */
		rec_offs_make_valid(rec, index, (ulint*) offsets);
	}

	table = index->table;
	row_len = dict_table_get_n_cols(table);

	row = dtuple_create(heap, row_len);

	dict_table_copy_types(row, table);

	dtuple_set_info_bits(row, rec_get_info_bits(
				     rec, dict_table_is_comp(table)));

	n_fields = rec_offs_n_fields(offsets);
	n_ext_cols = rec_offs_n_extern(offsets);
	if (n_ext_cols) {
		ext_cols = mem_heap_alloc(heap, n_ext_cols * sizeof *ext_cols);
	}

	for (i = j = 0; i < n_fields; i++) {
		dict_field_t*		ind_field
			= dict_index_get_nth_field(index, i);
		const dict_col_t*	col
			= dict_field_get_col(ind_field);
		ulint			col_no
			= dict_col_get_no(col);
		dfield_t*		dfield
			= dtuple_get_nth_field(row, col_no);

		if (ind_field->prefix_len == 0) {

			const byte*	field = rec_get_nth_field(
				rec, offsets, i, &len);

			dfield_set_data(dfield, field, len);
		}

		if (rec_offs_nth_extern(offsets, i)) {
			dfield_set_ext(dfield);

			if (UNIV_LIKELY_NULL(col_table)) {
				ut_a(col_no
				     < dict_table_get_n_cols(col_table));
				col = dict_table_get_nth_col(
					col_table, col_no);
			}

			if (col->ord_part) {
				/* We will have to fetch prefixes of
				externally stored columns that are
				referenced by column prefixes. */
				ext_cols[j++] = col_no;
			}
		}
	}

	ut_ad(dtuple_check_typed(row));

	if (!ext) {
		/* REDUNDANT and COMPACT formats store a local
		768-byte prefix of each externally stored
		column. No cache is needed. */
		ut_ad(dict_table_get_format(index->table)
		      < DICT_TF_FORMAT_ZIP);
	} else if (j) {
		*ext = row_ext_create(j, ext_cols, row,
				      dict_table_zip_size(index->table),
				      heap);
	} else {
		*ext = NULL;
	}

	if (tmp_heap) {
		mem_heap_free(tmp_heap);
	}

	return(row);
}
Exemplo n.º 8
0
dtuple_t*
row_build(
/*======*/
				/* out, own: row built; see the NOTE below! */
	ulint		type,	/* in: ROW_COPY_POINTERS, ROW_COPY_DATA, or
				ROW_COPY_ALSO_EXTERNALS, 
				the two last copy also the data fields to
				heap as the first only places pointers to
				data fields on the index page, and thus is
				more efficient */
	dict_index_t*	index,	/* in: clustered index */
	rec_t*		rec,	/* in: record in the clustered index;
				NOTE: in the case ROW_COPY_POINTERS
				the data fields in the row will point
				directly into this record, therefore,
				the buffer page of this record must be
				at least s-latched and the latch held
				as long as the row dtuple is used! */
	mem_heap_t*	heap)	/* in: memory heap from which the memory
				needed is allocated */
{
	dtuple_t*	row;
	dict_table_t*	table;
	dict_field_t*	ind_field;
	dict_col_t*	col;
	dfield_t*	dfield;
	ulint		n_fields;
	byte*		field;
	ulint		len;
	ulint		row_len;
	byte*		buf; 
	ulint		i;
	
	ut_ad(index && rec && heap);
	ut_ad(index->type & DICT_CLUSTERED);

	if (type != ROW_COPY_POINTERS) {
		/* Take a copy of rec to heap */
		buf = mem_heap_alloc(heap, rec_get_size(rec));
		rec = rec_copy(buf, rec);
	}

	table = index->table;
	row_len = dict_table_get_n_cols(table);

	row = dtuple_create(heap, row_len);

	dtuple_set_info_bits(row, rec_get_info_bits(rec));
	
	n_fields = dict_index_get_n_fields(index);

	ut_ad(n_fields == rec_get_n_fields(rec));

	dict_table_copy_types(row, table);

	for (i = 0; i < n_fields; i++) {
	        ind_field = dict_index_get_nth_field(index, i);

		if (ind_field->prefix_len == 0) {

		        col = dict_field_get_col(ind_field);
			dfield = dtuple_get_nth_field(row,
						dict_col_get_no(col));
			field = rec_get_nth_field(rec, i, &len);

			if (type == ROW_COPY_ALSO_EXTERNALS
			    && rec_get_nth_field_extern_bit(rec, i)) {

			        field = btr_rec_copy_externally_stored_field(
							rec, i, &len, heap);
			}

			dfield_set_data(dfield, field, len);
		}
	}

	ut_ad(dtuple_check_typed(row));

	return(row);
}