Definition of functions for UDFs and plugins. More...

#include <mysql.h>
#include <plugin.h>
#include <malloc.h>
#include <math.h>
#include <string.h>

Include dependency graph for sqlstat.h:

This graph shows which files directly or indirectly include this file:

Macros
#define	MYSQL_DYNAMIC_PLUGIN 1

#define	NOT_FIXED_DEC 31
	Maximum number of digits in double As defined in mysql/sql_string.h.

Functions
int	sqlstat_plugin_init (void *p)
	Initializes plugin.

int	sqlstat_plugin_deinit (void *p)
	Deinitializes plugin.

int	sqlstat_plugin_isloaded ()
	Check if plugin loaded. More...

my_bool	avgw_init (UDF_INIT initid, UDF_ARGS args, char *message)
	Called before first usage of function. More...

void	avgw_reset (UDF_INIT initid, UDF_ARGS args, char is_null, char error)
	Reset function and add first group member Calls clear and add. More...

void	avgw_clear (UDF_INIT initid, char is_null, char *error)
	Called at start of group. More...

void	avgw_add (UDF_INIT initid, UDF_ARGS args, char is_null, char error)
	Add a member of the group. More...

double	avgw (UDF_INIT initid, UDF_ARGS args, char is_null, char error)
	Retrieve weighted average. Called at end of group. More...

void	avgw_deinit (UDF_INIT *initid)
	Called after last access to function. More...

my_bool	corr_init (UDF_INIT initid, UDF_ARGS args, char *message)
	Called before first usage of function. More...

void	corr_reset (UDF_INIT initid, UDF_ARGS args, char is_null, char error)
	Reset function and add first group member Calls clear and add. More...

void	corr_clear (UDF_INIT initid, char is_null, char *error)
	Called at start of group. More...

void	corr_add (UDF_INIT initid, UDF_ARGS args, char is_null, char error)
	Add a member of the group. More...

double	corr (UDF_INIT initid, UDF_ARGS args, char is_null, char error)
	Retrieve correlation coefficient. Called at end of group. More...

void	corr_deinit (UDF_INIT *initid)
	Called after last access to function. More...

my_bool	gini_init (UDF_INIT initid, UDF_ARGS args, char *message)
	Called before first usage of function. More...

void	gini_reset (UDF_INIT initid, UDF_ARGS args, char is_null, char error)
	Reset function and add first group member Calls clear and add. More...

void	gini_clear (UDF_INIT initid, char is_null, char *error)
	Called at start of group. More...

void	gini_add (UDF_INIT initid, UDF_ARGS args, char is_null, char error)
	Add a member of the group. More...

double	gini (UDF_INIT initid, UDF_ARGS args, char is_null, char error)
	Retrieve gini. Called at end of group. More...

void	gini_deinit (UDF_INIT *initid)
	Called after last access to function. More...

my_bool	median_init (UDF_INIT initid, UDF_ARGS args, char *message)
	Called before first usage of function. More...

void	median_reset (UDF_INIT initid, UDF_ARGS args, char is_null, char error)
	Reset function and add first group member Calls clear and add. More...

void	median_clear (UDF_INIT initid, char is_null, char *error)
	Called at start of group. More...

void	median_add (UDF_INIT initid, UDF_ARGS args, char is_null, char error)
	Add a member of the group. More...

double	median (UDF_INIT initid, UDF_ARGS args, char is_null, char error)
	Retrieve median. Called at end of group. More...

void	median_deinit (UDF_INIT *initid)
	Called after last access to function. More...

my_bool	rand_mt_init (UDF_INIT initid, UDF_ARGS args, char *message)
	Called before first usage of function. More...

double	rand_mt (UDF_INIT initid, UDF_ARGS args, char is_null, char error)
	Retrieve Mersenne Twister random number. More...

void	rand_mt_deinit (UDF_INIT *initid)
	Called after last access to function. More...

my_bool	rand_norm_init (UDF_INIT initid, UDF_ARGS args, char *message)
	Called before first usage of function. More...

double	rand_norm (UDF_INIT initid, UDF_ARGS args, char is_null, char error)
	Retrieve a variate of the normal distribution. More...

void	rand_norm_deinit (UDF_INIT *initid)
	Called after last access to function. More...

my_bool	rownumber_init (UDF_INIT initid, UDF_ARGS args, char *message)
	Called before first usage of function. More...

long long	rownumber (UDF_INIT initid, UDF_ARGS args, char is_null, char error)
	Retrieve row number. More...

void	rownumber_deinit (UDF_INIT *initid)
	Called after last access to function. More...

my_bool	skewness_pop_init (UDF_INIT initid, UDF_ARGS args, char *message)
	Called before first usage of function. More...

void	skewness_pop_reset (UDF_INIT initid, UDF_ARGS args, char is_null, char error)
	Reset function and add first group member Calls clear and add. More...

void	skewness_pop_clear (UDF_INIT initid, char is_null, char *error)
	Called at start of group. More...

void	skewness_pop_add (UDF_INIT initid, UDF_ARGS args, char is_null, char error)
	Add a member of the group. More...

double	skewness_pop (UDF_INIT initid, UDF_ARGS args, char is_null, char error)
	Retrieve population moment coefficient of skewness. Called at end of group. More...

void	skewness_pop_deinit (UDF_INIT *initid)
	Called after last access to function. More...

my_bool	skewness_samp_init (UDF_INIT initid, UDF_ARGS args, char *message)
	Called before first usage of function. More...

void	skewness_samp_reset (UDF_INIT initid, UDF_ARGS args, char is_null, char error)
	Reset function and add first group member Calls clear and add. More...

void	skewness_samp_clear (UDF_INIT initid, char is_null, char *error)
	Called at start of group. More...

void	skewness_samp_add (UDF_INIT initid, UDF_ARGS args, char is_null, char error)
	Add a member of the group. More...

double	skewness_samp (UDF_INIT initid, UDF_ARGS args, char is_null, char error)
	Retrieve sample moment coefficient of skewness. Called at end of group. More...

void	skewness_samp_deinit (UDF_INIT *initid)
	Called after last access to function. More...

my_bool	stddevw_pop_init (UDF_INIT initid, UDF_ARGS args, char *message)
	Called before first usage of function. More...

void	stddevw_pop_reset (UDF_INIT initid, UDF_ARGS args, char is_null, char error)
	Reset function and add first group member Calls clear and add. More...

void	stddevw_pop_clear (UDF_INIT initid, char is_null, char *error)
	Called at start of group. More...

void	stddevw_pop_add (UDF_INIT initid, UDF_ARGS args, char is_null, char error)
	Add a member of the group. More...

double	stddevw_pop (UDF_INIT initid, UDF_ARGS args, char is_null, char error)
	Retrieve weighted standard deviation of population. Called at end of group. More...

void	stddevw_pop_deinit (UDF_INIT *initid)
	Called after last access to function. More...

my_bool	stddevw_samp_init (UDF_INIT initid, UDF_ARGS args, char *message)
	Called before first usage of function. More...

void	stddevw_samp_reset (UDF_INIT initid, UDF_ARGS args, char is_null, char error)
	Reset function and add first group member Calls clear and add. More...

void	stddevw_samp_clear (UDF_INIT initid, char is_null, char *error)
	Called at start of group. More...

void	stddevw_samp_add (UDF_INIT initid, UDF_ARGS args, char is_null, char error)
	Add a member of the group. More...

double	stddevw_samp (UDF_INIT initid, UDF_ARGS args, char is_null, char error)
	Retrieve weighted standard deviation of sample. Called at end of group. More...

void	stddevw_samp_deinit (UDF_INIT *initid)
	Called after last access to function. More...

Detailed Description

Definition of functions for UDFs and plugins.

Definition in file sqlstat.h.

Function Documentation

double avgw	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	is_null,
		char *	error
	)

Retrieve weighted average. Called at end of group.

Parameters

initid	function description
args	argument values
is_null	result is NULL
error	error message

Returns: weighted average

Definition at line 157 of file avgw.c.

void avgw_add	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	is_null,
		char *	error
	)

Add a member of the group.

The sums are updated

Parameters

initid	function description
args	argument values
is_null
error	error message

Definition at line 125 of file avgw.c.

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void avgw_clear	(	UDF_INIT *	initid,
		char *	is_null,
		char *	error
	)

Called at start of group.

void avgw_clear(UDF_INIT *initid, char *is_null, char *error) The sums are cleared.

Parameters

initid	function description
is_null
error	error message

Definition at line 108 of file avgw.c.

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void avgw_deinit ( UDF_INIT * initid )

Called after last access to function.

Deallocate memory for counter and sums.

Parameters

initid

Definition at line 177 of file avgw.c.

my_bool avgw_init	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	message
	)

Called before first usage of function.

Check parameters.
Indicate type of return value.
Allocate memory for sums.

Parameters

initid	function description
args	parameters
message	error message

Returns: success = 0

Definition at line 55 of file avgw.c.

void avgw_reset	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	is_null,
		char *	error
	)

Reset function and add first group member Calls clear and add.

Parameters

initid	function description
args	argument values
is_null
error	error message

Deprecated:: Reset is only called by MySQL 4.0 and below. It is implemented for backwards compatibility.

Definition at line 94 of file avgw.c.

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double corr	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	is_null,
		char *	error
	)

Retrieve correlation coefficient. Called at end of group.

Parameters

initid	function description
args	argument values
is_null	result is NULL
error	error message

Returns: correlation coefficient

Definition at line 172 of file corr.c.

void corr_add	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	is_null,
		char *	error
	)

Add a member of the group.

The counter and sums are updated

Parameters

initid	function description
args	argument values
is_null
error	error message

Definition at line 134 of file corr.c.

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void corr_clear	(	UDF_INIT *	initid,
		char *	is_null,
		char *	error
	)

Called at start of group.

The counter and sums are cleared.

Parameters

initid	function description
is_null
error	error message

Definition at line 113 of file corr.c.

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void corr_deinit ( UDF_INIT * initid )

Called after last access to function.

Deallocate memory for counter and sums.

Parameters

initid

Definition at line 201 of file corr.c.

my_bool corr_init	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	message
	)

Called before first usage of function.

Check parameters.
Indicate type of return value.
Allocate memory for counter and sums.

Parameters

initid	function description
args	parameters
message	error message

Returns: success = 0

Definition at line 59 of file corr.c.

void corr_reset	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	is_null,
		char *	error
	)

Reset function and add first group member Calls clear and add.

Parameters

initid	function description
args	argument values
is_null
error	error message

Deprecated:: Reset is only called by MySQL 4.0 and below. It is implemented for backwards compatibility.

Definition at line 99 of file corr.c.

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double gini	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	is_null,
		char *	error
	)

Retrieve gini. Called at end of group.

Parameters

initid	function description
args	argument values
is_null	result is NULL
error	error occured

Returns: gini

Definition at line 176 of file gini.cc.

void gini_add	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	is_null,
		char *	error
	)

Add a member of the group.

The counter and sums are updated

Parameters

initid	function description
args	argument values
is_null
error	error occured

Definition at line 146 of file gini.cc.

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void gini_clear	(	UDF_INIT *	initid,
		char *	is_null,
		char *	error
	)

Called at start of group.

The counter and sums are cleared.

Parameters

initid	function description
is_null
error	error message

Definition at line 129 of file gini.cc.

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void gini_deinit ( UDF_INIT * initid )

Called after last access to function.

Deallocate memory for counter and sums.

Parameters

initid

Definition at line 209 of file gini.cc.

my_bool gini_init	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	message
	)

Called before first usage of function.

Check parameters.
Indicate type of return value.
Allocate memory for counter and sums.

Parameters

initid	function description
args	parameters
message	error message

Returns: success = 0

Definition at line 76 of file gini.cc.

void gini_reset	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	is_null,
		char *	error
	)

Reset function and add first group member Calls clear and add.

Parameters

initid	function description
args	argument values
is_null
error	error message

Deprecated:: Reset is only called by MySQL 4.0 and below. It is implemented for backwards compatibility.

Definition at line 115 of file gini.cc.

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double median	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	is_null,
		char *	error
	)

Retrieve median. Called at end of group.

Parameters

initid	function description
args	argument values
is_null	result is NULL
error	error occured

Returns: median

Definition at line 145 of file median.cc.

void median_add	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	is_null,
		char *	error
	)

Add a member of the group.

The counter and sums are updated

Parameters

initid	function description
args	argument values
is_null
error	error occured

Definition at line 119 of file median.cc.

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void median_clear	(	UDF_INIT *	initid,
		char *	is_null,
		char *	error
	)

Called at start of group.

The counter and sums are cleared.

Parameters

initid	function description
is_null
error	error message

Definition at line 102 of file median.cc.

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void median_deinit ( UDF_INIT * initid )

Called after last access to function.

Deallocate memory for counter and sums.

Parameters

initid

Definition at line 183 of file median.cc.

my_bool median_init	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	message
	)

Called before first usage of function.

Check parameters.
Indicate type of return value.
Allocate memory for counter and sums.

Parameters

initid	function description
args	parameters
message	error message

Returns: success = 0

Definition at line 53 of file median.cc.

void median_reset	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	is_null,
		char *	error
	)

Reset function and add first group member Calls clear and add.

Parameters

initid	function description
args	argument values
is_null
error	error message

Deprecated:: Reset is only called by MySQL 4.0 and below. It is implemented for backwards compatibility.

Definition at line 88 of file median.cc.

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double rand_mt	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	is_null,
		char *	error
	)

Retrieve Mersenne Twister random number.

A double random number in the range [0,1[ is generated. It has 53 random bits.

Parameters

initid	function description
args	argument values
is_null	result is NULL
error	error message

Returns: random number

Definition at line 81 of file rand_mt.cc.

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void rand_mt_deinit ( UDF_INIT * initid )

Called after last access to function.

Deallocate memory for counter and sums.

Parameters

initid

Definition at line 92 of file rand_mt.cc.

my_bool rand_mt_init	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	message
	)

Called before first usage of function.

Checksparameters.
Indicate type of return value.

Parameters

initid	function description
args	parameters
message	error message

Returns: success = 0

Definition at line 48 of file rand_mt.cc.

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double rand_norm	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	is_null,
		char *	error
	)

Retrieve a variate of the normal distribution.

The default value for the mean $\mu$ is 0, the default value of the standard deviation $\sigma$ is 1.

Parameters

initid	function description
args	argument values
is_null	result is NULL
error	error message

Returns: random number

Definition at line 84 of file rand_norm.cc.

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void rand_norm_deinit ( UDF_INIT * initid )

Called after last access to function.

Parameters

initid

Definition at line 111 of file rand_norm.cc.

my_bool rand_norm_init	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	message
	)

Called before first usage of function.

Checksparameters.
Indicate type of return value.

Parameters

initid	function description
args	parameters
message	error message

Returns: success = 0

Definition at line 46 of file rand_norm.cc.

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long long rownumber	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	is_null,
		char *	error
	)

Retrieve row number.

Parameters

initid	function description
args	argument values
is_null	result is NULL
error	error message

Returns: row number

Definition at line 84 of file rownumber.c.

void rownumber_deinit ( UDF_INIT * initid )

Called after last access to function.

Deallocate memory for counter.

Parameters

initid

Definition at line 104 of file rownumber.c.

my_bool rownumber_init	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	message
	)

Called before first usage of function.

Checksparameters.
Indicate type of return value.

Parameters

initid	function description
args	parameters
message	error message

Returns: success = 0

Definition at line 51 of file rownumber.c.

double skewness_pop	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	is_null,
		char *	error
	)

Retrieve population moment coefficient of skewness. Called at end of group.

Parameters

initid	function description
args	argument values
is_null	result is NULL
error	error message

Returns: population moment coefficient of skewness

Definition at line 163 of file skewness_pop.c.

void skewness_pop_add	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	is_null,
		char *	error
	)

Add a member of the group.

The counter and sums are updated

Parameters

initid	function description
args	argument values
is_null
error	error message

Definition at line 129 of file skewness_pop.c.

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void skewness_pop_clear	(	UDF_INIT *	initid,
		char *	is_null,
		char *	error
	)

Called at start of group.

void skewness_pop_clear(UDF_INIT *initid, char *is_null, char *error) The counter and sums are cleared.

Parameters

initid	function description
is_null
error	error message

Definition at line 110 of file skewness_pop.c.

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void skewness_pop_deinit ( UDF_INIT * initid )

Called after last access to function.

Deallocate memory for counter and sums.

Parameters

initid

Definition at line 200 of file skewness_pop.c.

my_bool skewness_pop_init	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	message
	)

Called before first usage of function.

Check parameters.
Indicate type of return value.
Allocate memory for counter and sums.

Parameters

initid	function description
args	parameters
message	error message

Returns: success = 0

Definition at line 57 of file skewness_pop.c.

void skewness_pop_reset	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	is_null,
		char *	error
	)

Reset function and add first group member Calls clear and add.

Parameters

initid	function description
args	argument values
is_null
error	error message

Deprecated:: Reset is only called by MySQL 4.0 and below. It is implemented for backwards compatibility.

Definition at line 96 of file skewness_pop.c.

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double skewness_samp	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	is_null,
		char *	error
	)

Retrieve sample moment coefficient of skewness. Called at end of group.

Parameters

initid	function description
args	argument values
is_null	result is NULL
error	error message

Returns: sample moment coefficient of skewness

Definition at line 164 of file skewness_samp.c.

void skewness_samp_add	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	is_null,
		char *	error
	)

Add a member of the group.

The counter and sums are updated

Parameters

initid	function description
args	argument values
is_null
error	error message

Definition at line 130 of file skewness_samp.c.

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void skewness_samp_clear	(	UDF_INIT *	initid,
		char *	is_null,
		char *	error
	)

Called at start of group.

void skewness_samp_clear(UDF_INIT *initid, char *is_null, char *error) The counter and sums are cleared.

Parameters

initid	function description
is_null
error	error message

Definition at line 111 of file skewness_samp.c.

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void skewness_samp_deinit ( UDF_INIT * initid )

Called after last access to function.

Deallocate memory for counter and sums.

Parameters

initid

Definition at line 201 of file skewness_samp.c.

my_bool skewness_samp_init	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	message
	)

Called before first usage of function.

Check parameters.
Indicate type of return value.
Allocate memory for counter and sums.

Parameters

initid	function description
args	parameters
message	error message

Returns: success = 0

Definition at line 58 of file skewness_samp.c.

void skewness_samp_reset	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	is_null,
		char *	error
	)

Reset function and add first group member Calls clear and add.

Parameters

initid	function description
args	argument values
is_null
error	error message

Deprecated:: Reset is only called by MySQL 4.0 and below. It is implemented for backwards compatibility.

Definition at line 97 of file skewness_samp.c.

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int sqlstat_plugin_isloaded ( )

Check if plugin loaded.

Returns: plugin loaded = 1, plugin not loaded = 0

Definition at line 70 of file sqlplugin.cc.

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double stddevw_pop	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	is_null,
		char *	error
	)

Retrieve weighted standard deviation of population. Called at end of group.

Parameters

initid	function description
args	argument values
is_null	result is NULL
error	error message

Returns: weighted standard deviation of population

Definition at line 160 of file stddevw_pop.c.

void stddevw_pop_add	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	is_null,
		char *	error
	)

Add a member of the group.

The counter and sums are updated

Parameters

initid	function description
args	argument values
is_null
error	error message

Definition at line 127 of file stddevw_pop.c.

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void stddevw_pop_clear	(	UDF_INIT *	initid,
		char *	is_null,
		char *	error
	)

Called at start of group.

void stddevw_pop_clear(UDF_INIT *initid, char *is_null, char *error) The counter and sums are cleared.

Parameters

initid	function description
is_null
error	error message

Definition at line 109 of file stddevw_pop.c.

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void stddevw_pop_deinit ( UDF_INIT * initid )

Called after last access to function.

Deallocate memory for counter and sums.

Parameters

initid

Definition at line 190 of file stddevw_pop.c.

my_bool stddevw_pop_init	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	message
	)

Called before first usage of function.

Check parameters.
Indicate type of return value.
Allocate memory for counter and sums.

Parameters

initid	function description
args	parameters
message	error message

Returns: success = 0

Definition at line 56 of file stddevw_pop.c.

void stddevw_pop_reset	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	is_null,
		char *	error
	)

Reset function and add first group member Calls clear and add.

Parameters

initid	function description
args	argument values
is_null
error	error message

Deprecated:: Reset is only called by MySQL 4.0 and below. It is implemented for backwards compatibility.

Definition at line 95 of file stddevw_pop.c.

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double stddevw_samp	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	is_null,
		char *	error
	)

Retrieve weighted standard deviation of sample. Called at end of group.

Parameters

initid	function description
args	argument values
is_null	result is NULL
error	error message

Returns: weighted standard deviation of sample

Definition at line 161 of file stddevw_samp.c.

void stddevw_samp_add	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	is_null,
		char *	error
	)

Add a member of the group.

The counter and sums are updated

Parameters

initid	function description
args	argument values
is_null
error	error message

Definition at line 128 of file stddevw_samp.c.

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void stddevw_samp_clear	(	UDF_INIT *	initid,
		char *	is_null,
		char *	error
	)

Called at start of group.

void stddevw_samp_clear(UDF_INIT *initid, char *is_null, char *error) The counter and sums are cleared.

Parameters

initid	function description
is_null
error	error message

Definition at line 110 of file stddevw_samp.c.

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void stddevw_samp_deinit ( UDF_INIT * initid )

Called after last access to function.

Deallocate memory for counter and sums.

Parameters

initid

Definition at line 191 of file stddevw_samp.c.

my_bool stddevw_samp_init	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	message
	)

Called before first usage of function.

Check parameters.
Indicate type of return value.
Allocate memory for counter and sums.

Parameters

initid	function description
args	parameters
message	error message

Returns: success = 0

Definition at line 57 of file stddevw_samp.c.

void stddevw_samp_reset	(	UDF_INIT *	initid,
		UDF_ARGS *	args,
		char *	is_null,
		char *	error
	)

Reset function and add first group member Calls clear and add.

Parameters

initid	function description
args	argument values
is_null
error	error message

Deprecated:: Reset is only called by MySQL 4.0 and below. It is implemented for backwards compatibility.

Definition at line 96 of file stddevw_samp.c.

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