/[libdata]/branches/pear-db/include/xx_pgsql.php
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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Contents of /branches/pear-db/include/xx_pgsql.php

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Revision 60 - (show annotations)
Sat Mar 6 18:55:27 2004 UTC (17 years, 7 months ago) by dpavlin
File size: 3816 byte(s)
created global include directory and modified httpd configuration file
accordingly

1 <?php
2
3 # convert calls to xx_ SQL to PostgreSQL
4
5 # this is ugly cludge. Since MySQL calls xx_connect and expects to
6 # see database connection and after that calls xx_select_db to select
7 # which database to use, we ignore that alltogether. Insted, we are using
8 # well-known global variables to make correct connection to database, and
9 # ignore xx_select_db.
10
11 function XXX_debug ($string = "XXX_debug called with empty string") {
12 error_log($string, 0);
13 }
14
15 function xx_connect ( $db_srv, $db_usr, $db_pwd ) {
16 #$info = "host=$db_srv dbname=$db_nam user=$db_usr password=$db_pwd";
17 $info = "dbname=libdata user=dpavlin";
18 $GLOBALS['pg_dbh'] = pg_connect($info);
19 return $GLOBALS['pg_dbh'];
20 }
21
22 function xx_select_db ( $db_nam, $con ) {
23 return 1;
24 }
25
26
27 function xx_errno() {
28 # return 0 on success
29 $status = pg_result_status($GLOBALS['pg_dbh']);
30 if (
31 $status == PGSQL_EMPTY_QUERY ||
32 $status == PGSQL_COMMAND_OK ||
33 $status == PGSQL_TUPLES_OK ||
34 $status == PGSQL_COPY_TO ||
35 $status == PGSQL_COPY_FROM ||
36 $status == PGSQL_NONFATAL_ERROR
37 ) {
38 return 0;
39 } else {
40 return $status;
41 }
42 }
43
44 function xx_fetch_array ($rs) {
45 if ($GLOBALS["xx_element_nr $rs"] > pg_num_rows($rs)) {
46 return;
47 }
48 XXX_debug("xx_fetch_array ($rs) row: ".$GLOBALS["xx_element_nr $rs"]);
49 $arr = @pg_fetch_array($rs, $GLOBALS["xx_element_nr $rs"]);
50 $GLOBALS["xx_element_nr $rs"]++;
51 return $arr;
52 }
53
54
55 function xx_insert_id($con = 0) {
56 if ($con == 0) {
57 $con = $GLOBALS['pg_dbh'];
58 }
59 # this depends on premise that autoincrement field in tables
60 # is always first one. If would be better to search for field
61 # with sequence and return that, but it's too much work, and
62 # this seem to work most of the time
63 $oid = $GLOBALS["pg_last_oid"];
64 preg_match('/\s*insert\s+into\s+(\S+)\s+/is', $GLOBALS["pg_last_sql"], $table);
65 if ($table) {
66 $result = pg_query($con, "SELECT * FROM $table[1] where oid=$oid");
67 $arr = pg_fetch_array($result, 0, PGSQL_NUM);
68 XXX_debug("xx_insert_id (table: $table, oid: $oid): ".$arr[0]);
69 return $arr[0];
70 } else {
71 print "WARNING: xx_insert_id emulation failed! Last SQL query was '".$GLOBALS["pg_last_sql"]."' and I can't extract table name from that query. If I could, I would try to find tuple with oid $oid in it!";
72 exit;
73 }
74 }
75
76 function xx_num_rows($rs) {
77 $num = pg_num_rows($rs);
78 if (!isset($num)) {
79 $num = pg_affected_rows($rs);
80 }
81 if (!isset($num)) {
82 $num = 0;
83 }
84 XXX_debug("xx_num_rows: $num");
85 return $num;
86 }
87
88 function xx_query($sql, $con = 0) {
89
90 if ($con == 0) {
91 $con = $GLOBALS['pg_dbh'];
92 XXX_debug("xx_query (fixed conn): $sql");
93 } else {
94 XXX_debug("xx_query (conn: $con): $sql");
95 }
96
97 # PostgreSQL MVC obsoletes usage of lock/unlock in mysql terms
98 if (preg_match('/^\s*lock/is', $sql) || preg_match('/^\s*unlock/is', $sql)) {
99 return 1;
100 }
101
102 # fix Mysql contact function into something SQL92 compliant
103 $sql = preg_replace('/concat\(([^\,]+)\s*,\s*([^\)]+)\)/is', '\\1 || \\2', $sql);
104
105 # convert Mysql password function to md5
106 $sql = preg_replace('/password\(([^\)]+)\)/is', 'md5(\\1)', $sql);
107
108 # fix update statements to remove table name (which would be understood as
109 # schama in PostgreSQL
110 preg_match('/^\s*update\s+(\S+)\s+set/is', $sql, $table);
111 if ($table) {
112 $sql = preg_replace('/\s+'.$table[1].'\.(\w+)/is', ' \\1', $sql);
113 }
114
115 $sql = preg_replace('/password\(([^\)]+)\)/is', 'md5(\\1)', $sql);
116
117 $GLOBALS["pg_last_sql"] = $sql;
118
119 XXX_debug("xx_query [transformed]: $sql");
120
121 $ret = pg_query($con, $sql);
122
123 $GLOBALS["xx_element_nr $ret"] = 0;
124
125 $GLOBALS["pg_last_oid"] = pg_last_oid($ret);
126 if ($ret) {
127 return $ret;
128 } else {
129 print "WARNING: error executing SQL query '$sql'.";
130 }
131 }
132
133 function xx_data_seek($rs, $element_nr) {
134 $GLOBALS["xx_element_nr"] = $element_nr;
135 }
136
137 function xx_error() {
138 return pg_result_error($GLOBALS['pg_dbh']);
139 }
140
141 ?>

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