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149 lines
3.0 KiB
Plaintext
149 lines
3.0 KiB
Plaintext
%{
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/* MDB Tools - A library for reading MS Access database files
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* Copyright (C) 2000 Brian Bruns
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include "mdbsql.h"
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MdbSQL *_mdb_sql(MdbSQL *sql)
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{
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static MdbSQL *g_sql;
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if (sql) {
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g_sql = sql;
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}
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return g_sql;
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}
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%}
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%union {
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char *name;
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double dval;
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int ival;
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}
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%token <name> IDENT NAME PATH STRING NUMBER
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%token SELECT FROM WHERE CONNECT DISCONNECT TO LIST TABLES WHERE AND OR NOT
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%token DESCRIBE TABLE
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%token LTEQ GTEQ LIKE IS NULL
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%type <name> database
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%type <name> constant
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%type <ival> operator
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%type <ival> nulloperator
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%%
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stmt:
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query
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| error { yyclearin; mdb_sql_reset(_mdb_sql(NULL)); }
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;
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query:
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SELECT column_list FROM table where_clause {
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mdb_sql_select(_mdb_sql(NULL));
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}
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| CONNECT TO database {
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mdb_sql_open(_mdb_sql(NULL), $3); free($3);
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}
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| DISCONNECT {
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mdb_sql_close(_mdb_sql(NULL));
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}
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| DESCRIBE TABLE table {
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mdb_sql_describe_table(_mdb_sql(NULL));
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}
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| LIST TABLES {
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mdb_sql_listtables(_mdb_sql(NULL));
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}
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;
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where_clause:
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/* empty */
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| WHERE sarg_list
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;
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sarg_list:
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sarg
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| '(' sarg_list ')'
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| NOT sarg_list { mdb_sql_add_not(_mdb_sql(NULL)); }
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| sarg_list OR sarg_list { mdb_sql_add_or(_mdb_sql(NULL)); }
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| sarg_list AND sarg_list { mdb_sql_add_and(_mdb_sql(NULL)); }
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;
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sarg:
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NAME operator constant {
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mdb_sql_add_sarg(_mdb_sql(NULL), $1, $2, $3);
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free($1);
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free($3);
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}
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| constant operator NAME {
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mdb_sql_add_sarg(_mdb_sql(NULL), $3, $2, $1);
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free($1);
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free($3);
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}
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| NAME nulloperator {
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mdb_sql_add_sarg(_mdb_sql(NULL), $1, $2, NULL);
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free($1);
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}
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;
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operator:
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'=' { $$ = MDB_EQUAL; }
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| '>' { $$ = MDB_GT; }
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| '<' { $$ = MDB_LT; }
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| LTEQ { $$ = MDB_LTEQ; }
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| GTEQ { $$ = MDB_GTEQ; }
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| LIKE { $$ = MDB_LIKE; }
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;
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nulloperator:
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IS NULL { $$ = MDB_ISNULL; }
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| IS NOT NULL { $$ = MDB_NOTNULL; }
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;
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constant:
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NUMBER { $$ = $1; }
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| STRING { $$ = $1; }
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;
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database:
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PATH
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| NAME
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;
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table:
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NAME { mdb_sql_add_table(_mdb_sql(NULL), $1); free($1); }
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| IDENT { mdb_sql_add_table(_mdb_sql(NULL), $1); free($1); }
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;
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column_list:
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'*' { mdb_sql_all_columns(_mdb_sql(NULL)); }
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| column
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| column ',' column_list
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;
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column:
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NAME { mdb_sql_add_column(_mdb_sql(NULL), $1); free($1); }
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| IDENT { mdb_sql_add_column(_mdb_sql(NULL), $1); free($1); }
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;
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%%
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