-
Notifications
You must be signed in to change notification settings - Fork 0
/
sql_util.php
172 lines (161 loc) · 4.79 KB
/
sql_util.php
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
<?php
#Funciones util para generar el sql
function aliased ( $table, $alias )
{
$fields = array();
foreach ( $table[ 'fields' ] as $val )
{
$fields[] = $alias . '.' . $val;
}
return 'select ' . implode(', ', $fields ) . ' from ' . $table[ 'name' ] . ' as ' . $alias;
}
function getFNames( $fields, $bindings )
{
$res = array();
foreach ( $fields as $fn )
{
if ( array_key_exists( $fn, $bindings ) )
{
$res[] = $bindings[$fn];
}
else
{
$res[] = $fn;
}
}
return $res;
}
function getSelect( $table, $whereFields = array(), $alias = '', $extra = '', $join = '' )
{
if ( strlen( $alias ) != 0 )
{
$aliased = array();
foreach ($table['fields'] as $key) {
$aliased[] = $alias . '.' . $key;
}
$fs = implode( ', ', $aliased );
}
else
{
$fs = implode( ', ', $table['fields'] );
}
if ( strlen( $extra ) != 0 )
{
$fs .= ', ' . $extra;
}
# Where
$where = '';
if ( count( $whereFields ) != 0 )
{
$where .= ' where ';
for ( $i = 0, $size = count( $whereFields ), $last = $size - 1; $i < $size; $i++ )
{
$wf = $whereFields[$i];
if ( is_array( $wf ) )
{ # %field% %cmp% :%field% [and]
$where .= ( strlen( $alias ) == 0 ? '' : $alias . '.' ) . $wf[0] . $wf[1] . ' :' . $wf[0];
$where .= ( $i == $last ? '' : ' and ');
}
else
{ # %field% = :%field% [and]
$where .= ( strlen( $alias ) == 0 ? '' : $alias . '.' ) . $wf . ' = :' . $wf . ( $i == $last ? '' : ' and ' );
}
}
}
# Order by
if ( isset( $table['order'] ) )
{
$obs = array();
foreach ( $table['order'] as $pos )
{
$obs[] = $table['fields'][$pos];
}
$ob = ' order by ' . implode( ", ", $obs );
}
else
{
$ob = "";
}
return "select " . $fs . " from " . $table['name'] . ( strlen( $alias ) == 0 ? '' : ' as ' . $alias ) . ' ' . $join . ' ' . $where . ' ' . $ob;
}
function getSelectByIds( $table ) {
$where = array();
foreach ( $table['ids'] as $f )
{
$where[] = $table['fields'][$f];
}
return getSelect( $table, $where );
}
function getInsert( $table )
{
$fs = implode( ', ', $table['fields'] );
$qm = array();
foreach ( $table['fields'] as $com )
{
if ( array_key_exists( $com, $table['form'] ) )
{
$com = $table['form'][$com];
}
$qm[] = ':' . $com;
}
$qm = implode( ',' , $qm );
return 'insert into ' . $table['name'] . ' (' . $fs . ') values (' . $qm . ')';
}
function getUpdate( $table )
{
# Construyendo los sets: campo = :campo
$us = '';
for ( $i = 0, $size = count ( $table['fields'] ), $last = $size - 1 ; $i < $size; $i++ )
{
if ( array_key_exists( $i, $table['ids'] ) )
{
# No hacer nada
}
else
{
$fn = $table['fields'][$i];
$us .= $fn . ' = '; # Concatenar el nombre del campo
if ( array_key_exists( $fn, $table['form'] ) )
{
$fn = $table['form'][$fn];
}
$us .= ':' . $fn . ( $i == $last ? '' : ', ') ;
}
}
# Construir los where campo = :campo
$where = ' where ';
for ( $i = 0, $size = count( $table['ids'] ), $last = $size - 1; $i < $size; $i++ )
{
$pid = $table['ids'][$i]; # Obtener posicion del campo que es Identificador
$fw = $table['fields'][$pid]; # Obtener el nombre del campo Identificador
$where .= $fw . ' = ';
if ( array_key_exists( $fw, $table['form'] ) )
{
$fw = $table['form'][$fw];
}
# Agregar el comodin y concatenar un and si sigue otro parametro
$where .= ':' . $fw . ( $i == $last ? '' : ' and ');
}
return 'update ' . $table['name'] . ' set ' . $us . $where;
}
function getDelete( $table ) {
# Lanzar una exception si la tabla no cuenta con identificadores.
# De otro modo se estaría eliminando todo el contenido de la tabla.
$ds = '';
for ( $i = 0, $size = count( $table['ids'] ), $last = $size - 1; $i < $size; $i++ )
{
# El nombre al que apunta el identificador
$fn = $table['fields'][ $table['ids'][$i] ];
if ( array_key_exists( $fn, $table['form'] ) )
{
$nn = $table['form'][$fn]; # El campo se llama de otro modo en el formulario
}
else
{
$nn = $fn; # El campo se llama igual
}
$ds .= $fn . ' = :' . $nn . ( $i == $last ? '' : ' and ' );
}
return 'delete from ' . $table['name'] . ' where ' . $ds;
}
?>