dict0dict.ic

这是linux下运行的mysql软件包,可用于linux 下安装 php + mysql + apach 的网络配置

/**********************************************************************
Data dictionary system

(c) 1996 Innobase Oy

Created 1/8/1996 Heikki Tuuri
***********************************************************************/

#include "dict0load.h"
#include "trx0undo.h"
#include "trx0sys.h"

/*************************************************************************
Gets the column data type. */
UNIV_INLINE
dtype_t*
dict_col_get_type(
/*==============*/
	dict_col_t*	col)
{
	ut_ad(col);

	return(&col->type);
}

/*************************************************************************
Gets the column number. */
UNIV_INLINE
ulint
dict_col_get_no(
/*============*/
	dict_col_t*	col)
{
	ut_ad(col);

	return(col->ind);
}

/*************************************************************************
Gets the column position in the clustered index. */
UNIV_INLINE
ulint
dict_col_get_clust_pos(
/*===================*/
	dict_col_t*	col)
{
	ut_ad(col);

	return(col->clust_pos);
}

/************************************************************************
Gets the first index on the table (the clustered index). */
UNIV_INLINE
dict_index_t*
dict_table_get_first_index(
/*=======================*/
				/* out: index, NULL if none exists */
	dict_table_t*	table)	/* in: table */
{
	ut_ad(table);
	ut_ad(table->magic_n == DICT_TABLE_MAGIC_N);

	return(UT_LIST_GET_FIRST(table->indexes));
}

/************************************************************************
Gets the next index on the table. */
UNIV_INLINE
dict_index_t*
dict_table_get_next_index(
/*======================*/
				/* out: index, NULL if none left */
	dict_index_t*	index)	/* in: index */
{
	ut_ad(index);
	ut_ad(index->magic_n == DICT_INDEX_MAGIC_N);

	return(UT_LIST_GET_NEXT(indexes, index));
}

/************************************************************************
Gets the number of user-defined columns in a table in the dictionary
cache. */
UNIV_INLINE
ulint
dict_table_get_n_user_cols(
/*=======================*/
				/* out: number of user-defined (e.g., not
				ROW_ID) columns of a table */
	dict_table_t*	table)	/* in: table */
{
	ut_ad(table);
	ut_ad(table->magic_n == DICT_TABLE_MAGIC_N);
	ut_ad(table->cached);
	
	return(table->n_cols - DATA_N_SYS_COLS);
}

/************************************************************************
Gets the number of system columns in a table in the dictionary cache. */
UNIV_INLINE
ulint
dict_table_get_n_sys_cols(
/*======================*/
				/* out: number of system (e.g.,
				ROW_ID) columns of a table */
	dict_table_t*	table __attribute__((unused)))	/* in: table */
{
	ut_ad(table);
	ut_ad(table->magic_n == DICT_TABLE_MAGIC_N);
	ut_ad(table->cached);

	return(DATA_N_SYS_COLS);
}

/************************************************************************
Gets the number of all columns (also system) in a table in the dictionary
cache. */
UNIV_INLINE
ulint
dict_table_get_n_cols(
/*==================*/
				/* out: number of columns of a table */
	dict_table_t*	table)	/* in: table */
{
	ut_ad(table);
	ut_ad(table->magic_n == DICT_TABLE_MAGIC_N);
	ut_ad(table->cached);
	
	return(table->n_cols);
}

/************************************************************************
Gets the nth column of a table. */
UNIV_INLINE
dict_col_t*
dict_table_get_nth_col(
/*===================*/
				/* out: pointer to column object */
	dict_table_t*	table,	/* in: table */
	ulint		pos)	/* in: position of column */
{
	ut_ad(table);
	ut_ad(pos < table->n_def);
	ut_ad(table->magic_n == DICT_TABLE_MAGIC_N);

	return((table->cols) + pos);
}

/************************************************************************
Gets the given system column of a table. */
UNIV_INLINE
dict_col_t*
dict_table_get_sys_col(
/*===================*/
				/* out: pointer to column object */
	dict_table_t*	table,	/* in: table */
	ulint		sys)	/* in: DATA_ROW_ID, ... */
{
	dict_col_t*	col;

	ut_ad(table);
	ut_ad(sys < DATA_N_SYS_COLS);
	ut_ad(table->magic_n == DICT_TABLE_MAGIC_N);

	col = dict_table_get_nth_col(table, table->n_cols 
					   - DATA_N_SYS_COLS + sys);
	ut_ad(col->type.mtype == DATA_SYS);
	ut_ad(col->type.prtype == (sys | DATA_NOT_NULL));

	return(col);
}

/************************************************************************
Gets the given system column number of a table. */
UNIV_INLINE
ulint
dict_table_get_sys_col_no(
/*======================*/
				/* out: column number */
	dict_table_t*	table,	/* in: table */
	ulint		sys)	/* in: DATA_ROW_ID, ... */
{
	ut_ad(table);
	ut_ad(sys < DATA_N_SYS_COLS);
	ut_ad(table->magic_n == DICT_TABLE_MAGIC_N);

	return(table->n_cols - DATA_N_SYS_COLS + sys);
}

/************************************************************************
Gets the number of fields in the internal representation of an index,
including fields added by the dictionary system. */
UNIV_INLINE
ulint
dict_index_get_n_fields(
/*====================*/
				/* out: number of fields */
	dict_index_t*	index)	/* in: an internal representation of index
				(in the dictionary cache) */
{
	ut_ad(index);
	ut_ad(index->magic_n == DICT_INDEX_MAGIC_N);
	
	return(index->n_fields);
}

/************************************************************************
Gets the number of fields in the internal representation of an index
that uniquely determine the position of an index entry in the index, if
we do not take multiversioning into account: in the B-tree use the value
returned by dict_index_get_n_unique_in_tree. */
UNIV_INLINE
ulint
dict_index_get_n_unique(
/*====================*/
				/* out: number of fields */
	dict_index_t*	index)	/* in: an internal representation of index
				(in the dictionary cache) */
{
	ut_ad(index);
	ut_ad(index->magic_n == DICT_INDEX_MAGIC_N);
	ut_ad(index->cached);
	
	return(index->n_uniq);
}

/************************************************************************
Gets the number of fields in the internal representation of an index
which uniquely determine the position of an index entry in the index, if
we also take multiversioning into account. */
UNIV_INLINE
ulint
dict_index_get_n_unique_in_tree(
/*============================*/
				/* out: number of fields */
	dict_index_t*	index)	/* in: an internal representation of index
				(in the dictionary cache) */
{
	ut_ad(index);
	ut_ad(index->magic_n == DICT_INDEX_MAGIC_N);
	ut_ad(index->cached);
	
	if (index->type & DICT_CLUSTERED) {

		return(dict_index_get_n_unique(index));
	}

	return(dict_index_get_n_fields(index));
}

/************************************************************************
Gets the number of user-defined ordering fields in the index. In the internal
representation of clustered indexes we add the row id to the ordering fields
to make a clustered index unique, but this function returns the number of
fields the user defined in the index as ordering fields. */
UNIV_INLINE
ulint
dict_index_get_n_ordering_defined_by_user(
/*======================================*/
				/* out: number of fields */
	dict_index_t*	index)	/* in: an internal representation of index
				(in the dictionary cache) */
{
	return(index->n_user_defined_cols);
}

/************************************************************************
Gets the nth field of an index. */
UNIV_INLINE
dict_field_t*
dict_index_get_nth_field(
/*=====================*/
				/* out: pointer to field object */
	dict_index_t*	index,	/* in: index */
	ulint		pos)	/* in: position of field */
{
	ut_ad(index);
	ut_ad(pos < index->n_def);
	ut_ad(index->magic_n == DICT_INDEX_MAGIC_N);

	return((index->fields) + pos);
}

/************************************************************************
Returns the position of a system column in an index. */
UNIV_INLINE
ulint
dict_index_get_sys_col_pos(
/*=======================*/
				/* out: position, ULINT_UNDEFINED if not
				contained */
	dict_index_t*	index,	/* in: index */
	ulint		type)	/* in: DATA_ROW_ID, ... */
{
	dict_col_t*	col;

	ut_ad(index);
	ut_ad(index->magic_n == DICT_INDEX_MAGIC_N);
	ut_ad(!(index->type & DICT_UNIVERSAL));

	col = dict_table_get_sys_col(index->table, type);

	if (index->type & DICT_CLUSTERED) {

		return(col->clust_pos);
	}

	return(dict_index_get_nth_col_pos(index,
		dict_table_get_sys_col_no(index->table, type)));