pars0pars.h

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

/******************************************************
SQL parser

(c) 1996 Innobase Oy

Created 11/19/1996 Heikki Tuuri
*******************************************************/

#ifndef pars0pars_h
#define pars0pars_h

#include "univ.i"
#include "que0types.h"
#include "usr0types.h"
#include "pars0types.h"
#include "row0types.h"
#include "trx0types.h"

extern int	yydebug;

/* If the following is set TRUE, the lexer will print the SQL string
as it tokenizes it */

#ifdef UNIV_SQL_DEBUG
extern ibool	pars_print_lexed;
#endif /* UNIV_SQL_DEBUG */

/* Global variable used while parsing a single procedure or query : the code is
NOT re-entrant */
extern sym_tab_t*	pars_sym_tab_global;

extern pars_res_word_t	pars_to_char_token;
extern pars_res_word_t	pars_to_number_token;
extern pars_res_word_t	pars_to_binary_token;
extern pars_res_word_t	pars_binary_to_number_token;
extern pars_res_word_t	pars_substr_token;
extern pars_res_word_t	pars_replstr_token;
extern pars_res_word_t	pars_concat_token;
extern pars_res_word_t	pars_length_token;
extern pars_res_word_t	pars_instr_token;
extern pars_res_word_t	pars_sysdate_token;
extern pars_res_word_t	pars_printf_token;
extern pars_res_word_t	pars_assert_token;
extern pars_res_word_t	pars_rnd_token;
extern pars_res_word_t	pars_rnd_str_token;
extern pars_res_word_t	pars_count_token;
extern pars_res_word_t	pars_sum_token;
extern pars_res_word_t	pars_distinct_token;
extern pars_res_word_t	pars_int_token;
extern pars_res_word_t	pars_char_token;
extern pars_res_word_t	pars_float_token;
extern pars_res_word_t	pars_update_token;
extern pars_res_word_t	pars_asc_token;
extern pars_res_word_t	pars_desc_token;
extern pars_res_word_t	pars_open_token;
extern pars_res_word_t	pars_close_token;
extern pars_res_word_t	pars_consistent_token;
extern pars_res_word_t	pars_unique_token;
extern pars_res_word_t	pars_clustered_token;

extern ulint		pars_star_denoter;
	
/* Procedure parameter types */
#define PARS_INPUT	0
#define PARS_OUTPUT	1
#define PARS_NOT_PARAM	2

int
yyparse(void);

/*****************************************************************
Parses an SQL string returning the query graph. */

que_t*
pars_sql(
/*=====*/
				/* out, own: the query graph */
	const char*	str);	/* in: SQL string */
/*****************************************************************
Retrieves characters to the lexical analyzer. */

void
pars_get_lex_chars(
/*===============*/
	char*	buf,		/* in/out: buffer where to copy */
	int*	result,		/* out: number of characters copied or EOF */
	int	max_size);	/* in: maximum number of characters which fit
				in the buffer */
/*****************************************************************
Called by yyparse on error. */

void
yyerror(
/*====*/
	const char*	s);	/* in: error message string */
/*************************************************************************
Parses a variable declaration. */

sym_node_t*
pars_variable_declaration(
/*======================*/
				/* out, own: symbol table node of type
				SYM_VAR */
	sym_node_t*	node,	/* in: symbol table node allocated for the
				id of the variable */
	pars_res_word_t* type);	/* in: pointer to a type token */
/*************************************************************************
Parses a function expression. */

func_node_t*
pars_func(
/*======*/
				/* out, own: function node in a query tree */
	que_node_t* 	res_word,/* in: function name reserved word */
	que_node_t*	arg);	/* in: first argument in the argument list */
/*************************************************************************
Parses an operator expression. */

func_node_t*
pars_op(
/*====*/
				/* out, own: function node in a query tree */
	int		func,	/* in: operator token code */
	que_node_t*	arg1,	/* in: first argument */
	que_node_t*	arg2);	/* in: second argument or NULL for an unary
				operator */
/*************************************************************************
Parses an ORDER BY clause. Order by a single column only is supported. */

order_node_t*
pars_order_by(
/*==========*/
				/* out, own: order-by node in a query tree */
	sym_node_t*	column,	/* in: column name */
	pars_res_word_t* asc);	/* in: &pars_asc_token or pars_desc_token */
/*************************************************************************
Parses a select list; creates a query graph node for the whole SELECT
statement. */

sel_node_t*
pars_select_list(
/*=============*/
					/* out, own: select node in a query
					tree */
	que_node_t*	select_list,	/* in: select list */
	sym_node_t*	into_list);	/* in: variables list or NULL */
/*************************************************************************
Parses a cursor declaration. */

que_node_t*
pars_cursor_declaration(
/*====================*/
					/* out: sym_node */
	sym_node_t*	sym_node,	/* in: cursor id node in the symbol
					table */
	sel_node_t*	select_node);	/* in: select node */
/*************************************************************************
Parses a select statement. */

sel_node_t*
pars_select_statement(
/*==================*/
					/* out, own: select node in a query
					tree */
	sel_node_t*	select_node,	/* in: select node already containing
					the select list */
	sym_node_t*	table_list,	/* in: table list */
	que_node_t*	search_cond,	/* in: search condition or NULL */
	pars_res_word_t* for_update,	/* in: NULL or &pars_update_token */
	pars_res_word_t* consistent_read,/* in: NULL or
						&pars_consistent_token */
	order_node_t*	order_by);	/* in: NULL or an order-by node */
/*************************************************************************
Parses a column assignment in an update. */

col_assign_node_t*
pars_column_assignment(
/*===================*/
				/* out: column assignment node */
	sym_node_t*	column,	/* in: column to assign */
	que_node_t*	exp);	/* in: value to assign */
/*************************************************************************
Parses a delete or update statement start. */

upd_node_t*
pars_update_statement_start(
/*========================*/
					/* out, own: update node in a query
					tree */
	ibool		is_delete,	/* in: TRUE if delete */
	sym_node_t*	table_sym,	/* in: table name node */
	col_assign_node_t* col_assign_list);/* in: column assignment list, NULL
					if delete */	
/*************************************************************************
Parses an update or delete statement. */

upd_node_t*
pars_update_statement(
/*==================*/
					/* out, own: update node in a query
					tree */
	upd_node_t*	node,		/* in: update node */
	sym_node_t*	cursor_sym,	/* in: pointer to a cursor entry in
					the symbol table or NULL */
	que_node_t*	search_cond);	/* in: search condition or NULL */
/*************************************************************************
Parses an insert statement. */

ins_node_t*
pars_insert_statement(
/*==================*/
					/* out, own: update node in a query
					tree */
	sym_node_t*	table_sym,	/* in: table name node */
	que_node_t* 	values_list,	/* in: value expression list or NULL */
	sel_node_t*	select);	/* in: select condition or NULL */
/*************************************************************************
Parses a procedure parameter declaration. */

sym_node_t*
pars_parameter_declaration(
/*=======================*/
				/* out, own: symbol table node of type
				SYM_VAR */
	sym_node_t*	node,	/* in: symbol table node allocated for the
				id of the parameter */
	ulint		param_type,
				/* in: PARS_INPUT or PARS_OUTPUT */
	pars_res_word_t* type);	/* in: pointer to a type token */
/*************************************************************************
Parses an elsif element. */

elsif_node_t*
pars_elsif_element(
/*===============*/
					/* out: elsif node */
	que_node_t*	cond,		/* in: if-condition */
	que_node_t*	stat_list);	/* in: statement list */
/*************************************************************************
Parses an if-statement. */

if_node_t*
pars_if_statement(
/*==============*/
					/* out: if-statement node */
	que_node_t*	cond,		/* in: if-condition */
	que_node_t*	stat_list,	/* in: statement list */
	que_node_t*	else_part);	/* in: else-part statement list */
/*************************************************************************
Parses a for-loop-statement. */

for_node_t*
pars_for_statement(
/*===============*/
					/* out: for-statement node */
	sym_node_t*	loop_var,	/* in: loop variable */
	que_node_t*	loop_start_limit,/* in: loop start expression */
	que_node_t*	loop_end_limit,	/* in: loop end expression */
	que_node_t*	stat_list);	/* in: statement list */
/*************************************************************************
Parses a while-statement. */

while_node_t*
pars_while_statement(