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/* Copyright (c) 2017, 2024, Oracle and/or its affiliates.
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Without limiting anything contained in the foregoing, this file,
which is part of C Driver for MySQL (Connector/C), is also subject to the
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This program is distributed in the hope that it will be useful,
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#ifndef UDF_REGISTRATION_TYPES_H
#define UDF_REGISTRATION_TYPES_H
#ifndef MYSQL_ABI_CHECK
#include <stdbool.h>
#endif
/**
Type of the user defined function return slot and arguments
*/
enum Item_result {
INVALID_RESULT = -1, /** not valid for UDFs */
STRING_RESULT = 0, /** char * */
REAL_RESULT, /** double */
INT_RESULT, /** long long */
ROW_RESULT, /** not valid for UDFs */
DECIMAL_RESULT /** char *, to be converted to/from a decimal */
};
typedef struct UDF_ARGS {
unsigned int arg_count; /**< Number of arguments */
enum Item_result *arg_type; /**< Pointer to item_results */
char **args; /**< Pointer to argument */
unsigned long *lengths; /**< Length of string arguments */
char *maybe_null; /**< Set to 1 for all maybe_null args */
char **attributes; /**< Pointer to attribute name */
unsigned long *attribute_lengths; /**< Length of attribute arguments */
void *extension;
} UDF_ARGS;
/**
Information about the result of a user defined function
@todo add a notion for determinism of the UDF.
@sa Item_udf_func::update_used_tables()
*/
typedef struct UDF_INIT {
bool maybe_null; /** 1 if function can return NULL */
unsigned int decimals; /** for real functions */
unsigned long max_length; /** For string functions */
char *ptr; /** free pointer for function data */
bool const_item; /** 1 if function always returns the same value */
void *extension;
} UDF_INIT;
enum Item_udftype { UDFTYPE_FUNCTION = 1, UDFTYPE_AGGREGATE };
typedef void (*Udf_func_clear)(UDF_INIT *, unsigned char *, unsigned char *);
typedef void (*Udf_func_add)(UDF_INIT *, UDF_ARGS *, unsigned char *,
unsigned char *);
typedef void (*Udf_func_deinit)(UDF_INIT *);
typedef bool (*Udf_func_init)(UDF_INIT *, UDF_ARGS *, char *);
typedef void (*Udf_func_any)(void);
typedef double (*Udf_func_double)(UDF_INIT *, UDF_ARGS *, unsigned char *,
unsigned char *);
typedef long long (*Udf_func_longlong)(UDF_INIT *, UDF_ARGS *, unsigned char *,
unsigned char *);
typedef char *(*Udf_func_string)(UDF_INIT *, UDF_ARGS *, char *,
unsigned long *, unsigned char *,
unsigned char *);
#endif /* UDF_REGISTRATION_TYPES_H */
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