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|
<?php
/**
* PHPPgAdmin v6.0.0-RC2
*/
namespace PHPPgAdmin\Database;
/**
* A Class that implements the DB Interface for Postgres
* Note: This Class uses ADODB and returns RecordSets.
*
* Id: Postgres.php,v 1.320 2008/02/20 20:43:09 ioguix Exp $
*
* @package PHPPgAdmin
*/
class Postgres extends ADOdbBase
{
use \PHPPgAdmin\Traits\HelperTrait;
use \PHPPgAdmin\Database\Traits\AggregateTrait;
use \PHPPgAdmin\Database\Traits\DatabaseTrait;
use \PHPPgAdmin\Database\Traits\DomainTrait;
use \PHPPgAdmin\Database\Traits\FtsTrait;
use \PHPPgAdmin\Database\Traits\FunctionTrait;
use \PHPPgAdmin\Database\Traits\IndexTrait;
use \PHPPgAdmin\Database\Traits\OperatorTrait;
use \PHPPgAdmin\Database\Traits\RoleTrait;
use \PHPPgAdmin\Database\Traits\SchemaTrait;
use \PHPPgAdmin\Database\Traits\SequenceTrait;
use \PHPPgAdmin\Database\Traits\TablespaceTrait;
use \PHPPgAdmin\Database\Traits\TableTrait;
use \PHPPgAdmin\Database\Traits\TypeTrait;
use \PHPPgAdmin\Database\Traits\ViewTrait;
use \PHPPgAdmin\Database\Traits\StatsTrait;
use \PHPPgAdmin\Database\Traits\PrivilegesTrait;
public $lang;
public $conf;
protected $container;
protected $server_info;
public function __construct(&$conn, $container, $server_info)
{
//$this->prtrace('major_version :' . $this->major_version);
$this->conn = $conn;
$this->container = $container;
$this->lang = $container->get('lang');
$this->conf = $container->get('conf');
$this->server_info = $server_info;
}
/**
* Fetch a URL (or array of URLs) for a given help page.
*
* @param string $help
*
* @return null|array|string the help page or pages related to the $help topic, or null if none exists
*/
public function getHelp($help)
{
$this->getHelpPages();
if (isset($this->help_page[$help])) {
if (is_array($this->help_page[$help])) {
$urls = [];
foreach ($this->help_page[$help] as $link) {
$urls[] = $this->help_base.$link;
}
return $urls;
}
return $this->help_base.$this->help_page[$help];
}
return null;
}
/**
* Gets the help pages.
* get help page by instancing the corresponding help class
* if $this->help_page and $this->help_base are set, this function is a noop.
*/
public function getHelpPages()
{
if ($this->help_page === null || $this->help_base === null) {
$help_classname = '\PHPPgAdmin\Help\PostgresDoc'.str_replace('.', '', $this->major_version);
$help_class = new $help_classname($this->conf, $this->major_version);
$this->help_base = $help_class->getHelpBase();
}
}
// Formatting functions
/**
* Outputs the HTML code for a particular field.
*
* @param string $name The name to give the field
* @param mixed $value The value of the field. Note this could be 'numeric(7,2)' sort of thing...
* @param string $type The database type of the field
* @param array $extras An array of attributes name as key and attributes' values as value
*/
public function printField($name, $value, $type, $extras = [])
{
$lang = $this->lang;
// Determine actions string
$extra_str = '';
foreach ($extras as $k => $v) {
$extra_str .= " {$k}=\"".htmlspecialchars($v).'"';
}
switch (substr($type, 0, 9)) {
case 'bool':
case 'boolean':
if ($value !== null && $value == '') {
$value = null;
} elseif ($value == 'true') {
$value = 't';
} elseif ($value == 'false') {
$value = 'f';
}
// If value is null, 't' or 'f'...
if ($value === null || $value == 't' || $value == 'f') {
echo '<select name="', htmlspecialchars($name), "\"{$extra_str}>\n";
echo '<option value=""', ($value === null) ? ' selected="selected"' : '', "></option>\n";
echo '<option value="t"', ($value == 't') ? ' selected="selected"' : '', ">{$lang['strtrue']}</option>\n";
echo '<option value="f"', ($value == 'f') ? ' selected="selected"' : '', ">{$lang['strfalse']}</option>\n";
echo "</select>\n";
} else {
echo '<input name="', htmlspecialchars($name), '" value="', htmlspecialchars($value), "\" size=\"35\"{$extra_str} />\n";
}
break;
case 'bytea':
case 'bytea[]':
if (!is_null($value)) {
$value = $this->escapeBytea($value);
}
// no break
case 'text':
case 'text[]':
case 'json':
case 'jsonb':
case 'xml':
case 'xml[]':
$n = substr_count($value, "\n");
$n = $n < 5 ? max(2, $n) : $n;
$n = $n > 20 ? 20 : $n;
echo '<textarea name="', htmlspecialchars($name), "\" rows=\"{$n}\" cols=\"85\"{$extra_str}>\n";
echo htmlspecialchars($value);
echo "</textarea>\n";
break;
case 'character':
case 'character[]':
$n = substr_count($value, "\n");
$n = $n < 5 ? 5 : $n;
$n = $n > 20 ? 20 : $n;
echo '<textarea name="', htmlspecialchars($name), "\" rows=\"{$n}\" cols=\"35\"{$extra_str}>\n";
echo htmlspecialchars($value);
echo "</textarea>\n";
break;
default:
echo '<input name="', htmlspecialchars($name), '" value="', htmlspecialchars($value), "\" size=\"35\"{$extra_str} />\n";
break;
}
}
/**
* Searches all system catalogs to find objects that match a certain name.
*
* @param string $term The search term
* @param string $filter The object type to restrict to ('' means no restriction)
*
* @return \PHPPgAdmin\ADORecordSet A recordset
*/
public function findObject($term, $filter)
{
$conf = $this->conf;
/*about escaping:
* SET standard_conforming_string is not available before 8.2
* So we must use PostgreSQL specific notation :/
* E'' notation is not available before 8.1
* $$ is available since 8.0
* Nothing specific from 7.4
*/
// Escape search term for ILIKE match
$this->clean($term);
$this->clean($filter);
$term = str_replace('_', '\_', $term);
$term = str_replace('%', '\%', $term);
// Exclude system relations if necessary
if (!$conf['show_system']) {
// XXX: The mention of information_schema here is in the wrong place, but
// it's the quickest fix to exclude the info schema from 7.4
$where = " AND pn.nspname NOT LIKE \$_PATERN_\$pg\\_%\$_PATERN_\$ AND pn.nspname != 'information_schema'";
$lan_where = 'AND pl.lanispl';
} else {
$where = '';
$lan_where = '';
}
// Apply outer filter
$sql = '';
if ($filter != '') {
$sql = 'SELECT * FROM (';
}
$term = "\$_PATERN_\$%{$term}%\$_PATERN_\$";
$sql .= "
SELECT 'SCHEMA' AS type, oid, NULL AS schemaname, NULL AS relname, nspname AS name
FROM pg_catalog.pg_namespace pn WHERE nspname ILIKE {$term} {$where}
UNION ALL
SELECT CASE WHEN relkind='r' THEN 'TABLE' WHEN relkind='v' THEN 'VIEW' WHEN relkind='S' THEN 'SEQUENCE' END, pc.oid,
pn.nspname, NULL, pc.relname FROM pg_catalog.pg_class pc, pg_catalog.pg_namespace pn
WHERE pc.relnamespace=pn.oid AND relkind IN ('r', 'v', 'S') AND relname ILIKE {$term} {$where}
UNION ALL
SELECT CASE WHEN pc.relkind='r' THEN 'COLUMNTABLE' ELSE 'COLUMNVIEW' END, NULL, pn.nspname, pc.relname, pa.attname FROM pg_catalog.pg_class pc, pg_catalog.pg_namespace pn,
pg_catalog.pg_attribute pa WHERE pc.relnamespace=pn.oid AND pc.oid=pa.attrelid
AND pa.attname ILIKE {$term} AND pa.attnum > 0 AND NOT pa.attisdropped AND pc.relkind IN ('r', 'v') {$where}
UNION ALL
SELECT 'FUNCTION', pp.oid, pn.nspname, NULL, pp.proname || '(' || pg_catalog.oidvectortypes(pp.proargtypes) || ')' FROM pg_catalog.pg_proc pp, pg_catalog.pg_namespace pn
WHERE pp.pronamespace=pn.oid AND NOT pp.proisagg AND pp.proname ILIKE {$term} {$where}
UNION ALL
SELECT 'INDEX', NULL, pn.nspname, pc.relname, pc2.relname FROM pg_catalog.pg_class pc, pg_catalog.pg_namespace pn,
pg_catalog.pg_index pi, pg_catalog.pg_class pc2 WHERE pc.relnamespace=pn.oid AND pc.oid=pi.indrelid
AND pi.indexrelid=pc2.oid
AND NOT EXISTS (
SELECT 1 FROM pg_catalog.pg_depend d JOIN pg_catalog.pg_constraint c
ON (d.refclassid = c.tableoid AND d.refobjid = c.oid)
WHERE d.classid = pc2.tableoid AND d.objid = pc2.oid AND d.deptype = 'i' AND c.contype IN ('u', 'p')
)
AND pc2.relname ILIKE {$term} {$where}
UNION ALL
SELECT 'CONSTRAINTTABLE', NULL, pn.nspname, pc.relname, pc2.conname FROM pg_catalog.pg_class pc, pg_catalog.pg_namespace pn,
pg_catalog.pg_constraint pc2 WHERE pc.relnamespace=pn.oid AND pc.oid=pc2.conrelid AND pc2.conrelid != 0
AND CASE WHEN pc2.contype IN ('f', 'c') THEN TRUE ELSE NOT EXISTS (
SELECT 1 FROM pg_catalog.pg_depend d JOIN pg_catalog.pg_constraint c
ON (d.refclassid = c.tableoid AND d.refobjid = c.oid)
WHERE d.classid = pc2.tableoid AND d.objid = pc2.oid AND d.deptype = 'i' AND c.contype IN ('u', 'p')
) END
AND pc2.conname ILIKE {$term} {$where}
UNION ALL
SELECT 'CONSTRAINTDOMAIN', pt.oid, pn.nspname, pt.typname, pc.conname FROM pg_catalog.pg_type pt, pg_catalog.pg_namespace pn,
pg_catalog.pg_constraint pc WHERE pt.typnamespace=pn.oid AND pt.oid=pc.contypid AND pc.contypid != 0
AND pc.conname ILIKE {$term} {$where}
UNION ALL
SELECT 'TRIGGER', NULL, pn.nspname, pc.relname, pt.tgname FROM pg_catalog.pg_class pc, pg_catalog.pg_namespace pn,
pg_catalog.pg_trigger pt WHERE pc.relnamespace=pn.oid AND pc.oid=pt.tgrelid
AND ( pt.tgconstraint = 0 OR NOT EXISTS
(SELECT 1 FROM pg_catalog.pg_depend d JOIN pg_catalog.pg_constraint c
ON (d.refclassid = c.tableoid AND d.refobjid = c.oid)
WHERE d.classid = pt.tableoid AND d.objid = pt.oid AND d.deptype = 'i' AND c.contype = 'f'))
AND pt.tgname ILIKE {$term} {$where}
UNION ALL
SELECT 'RULETABLE', NULL, pn.nspname AS schemaname, c.relname AS tablename, r.rulename FROM pg_catalog.pg_rewrite r
JOIN pg_catalog.pg_class c ON c.oid = r.ev_class
LEFT JOIN pg_catalog.pg_namespace pn ON pn.oid = c.relnamespace
WHERE c.relkind='r' AND r.rulename != '_RETURN' AND r.rulename ILIKE {$term} {$where}
UNION ALL
SELECT 'RULEVIEW', NULL, pn.nspname AS schemaname, c.relname AS tablename, r.rulename FROM pg_catalog.pg_rewrite r
JOIN pg_catalog.pg_class c ON c.oid = r.ev_class
LEFT JOIN pg_catalog.pg_namespace pn ON pn.oid = c.relnamespace
WHERE c.relkind='v' AND r.rulename != '_RETURN' AND r.rulename ILIKE {$term} {$where}
";
//\Kint::dump($sql);
// Add advanced objects if show_advanced is set
if ($conf['show_advanced']) {
$sql .= "
UNION ALL
SELECT CASE WHEN pt.typtype='d' THEN 'DOMAIN' ELSE 'TYPE' END, pt.oid, pn.nspname, NULL,
pt.typname FROM pg_catalog.pg_type pt, pg_catalog.pg_namespace pn
WHERE pt.typnamespace=pn.oid AND typname ILIKE {$term}
AND (pt.typrelid = 0 OR (SELECT c.relkind = 'c' FROM pg_catalog.pg_class c WHERE c.oid = pt.typrelid))
{$where}
UNION ALL
SELECT 'OPERATOR', po.oid, pn.nspname, NULL, po.oprname FROM pg_catalog.pg_operator po, pg_catalog.pg_namespace pn
WHERE po.oprnamespace=pn.oid AND oprname ILIKE {$term} {$where}
UNION ALL
SELECT 'CONVERSION', pc.oid, pn.nspname, NULL, pc.conname FROM pg_catalog.pg_conversion pc,
pg_catalog.pg_namespace pn WHERE pc.connamespace=pn.oid AND conname ILIKE {$term} {$where}
UNION ALL
SELECT 'LANGUAGE', pl.oid, NULL, NULL, pl.lanname FROM pg_catalog.pg_language pl
WHERE lanname ILIKE {$term} {$lan_where}
UNION ALL
SELECT DISTINCT ON (p.proname) 'AGGREGATE', p.oid, pn.nspname, NULL, p.proname FROM pg_catalog.pg_proc p
LEFT JOIN pg_catalog.pg_namespace pn ON p.pronamespace=pn.oid
WHERE p.proisagg AND p.proname ILIKE {$term} {$where}
UNION ALL
SELECT DISTINCT ON (po.opcname) 'OPCLASS', po.oid, pn.nspname, NULL, po.opcname FROM pg_catalog.pg_opclass po,
pg_catalog.pg_namespace pn WHERE po.opcnamespace=pn.oid
AND po.opcname ILIKE {$term} {$where}
";
} else {
// Otherwise just add domains
$sql .= "
UNION ALL
SELECT 'DOMAIN', pt.oid, pn.nspname, NULL,
pt.typname FROM pg_catalog.pg_type pt, pg_catalog.pg_namespace pn
WHERE pt.typnamespace=pn.oid AND pt.typtype='d' AND typname ILIKE {$term}
AND (pt.typrelid = 0 OR (SELECT c.relkind = 'c' FROM pg_catalog.pg_class c WHERE c.oid = pt.typrelid))
{$where}
";
}
if ($filter != '') {
// We use like to make RULE, CONSTRAINT and COLUMN searches work
$sql .= ") AS sub WHERE type LIKE '{$filter}%' ";
}
$sql .= 'ORDER BY type, schemaname, relname, name';
return $this->selectSet($sql);
}
/**
* Given an array of attnums and a relation, returns an array mapping
* attribute number to attribute name.
*
* @param string $table The table to get attributes for
* @param array $atts An array of attribute numbers
*
* @return array|int An array mapping attnum to attname or error code
* - -1 $atts must be an array
* - -2 wrong number of attributes found
*/
public function getAttributeNames($table, $atts)
{
$c_schema = $this->_schema;
$this->clean($c_schema);
$this->clean($table);
$this->arrayClean($atts);
if (!is_array($atts)) {
return -1;
}
if (sizeof($atts) == 0) {
return [];
}
$sql = "SELECT attnum, attname FROM pg_catalog.pg_attribute WHERE
attrelid=(SELECT oid FROM pg_catalog.pg_class WHERE relname='{$table}' AND
relnamespace=(SELECT oid FROM pg_catalog.pg_namespace WHERE nspname='{$c_schema}'))
AND attnum IN ('".join("','", $atts)."')";
$rs = $this->selectSet($sql);
if ($rs->recordCount() != sizeof($atts)) {
return -2;
}
$temp = [];
while (!$rs->EOF) {
$temp[$rs->fields['attnum']] = $rs->fields['attname'];
$rs->moveNext();
}
return $temp;
}
/**
* Gets all languages.
*
* @param bool $all True to get all languages, regardless of show_system
*
* @return \PHPPgAdmin\ADORecordSet A recordset
*/
public function getLanguages($all = false)
{
$conf = $this->conf;
if ($conf['show_system'] || $all) {
$where = '';
} else {
$where = 'WHERE lanispl';
}
$sql = "
SELECT
lanname, lanpltrusted,
lanplcallfoid::pg_catalog.regproc AS lanplcallf
FROM
pg_catalog.pg_language
{$where}
ORDER BY lanname
";
return $this->selectSet($sql);
}
/**
* Executes an SQL script as a series of SQL statements. Returns
* the result of the final step. This is a very complicated lexer
* based on the REL7_4_STABLE src/bin/psql/mainloop.c lexer in
* the PostgreSQL source code.
* XXX: It does not handle multibyte languages properly.
*
* @param string $name Entry in $_FILES to use
* @param null|callable $callback (optional) Callback function to call with each query, its result and line number
*
* @return bool|mixed true for general success, false on any failure, or resultset
*/
public function executeScript($name, $callback = null)
{
// This whole function isn't very encapsulated, but hey...
$conn = $this->conn->_connectionID;
if (!is_uploaded_file($_FILES[$name]['tmp_name'])) {
return false;
}
$fd = fopen($_FILES[$name]['tmp_name'], 'rb');
if ($fd === false) {
return false;
}
// Build up each SQL statement, they can be multiline
$query_buf = null;
$query_start = 0;
$in_quote = 0;
$in_xcomment = 0;
$bslash_count = 0;
$dol_quote = '';
$paren_level = 0;
$len = 0;
$i = 0;
$prevlen = 0;
$thislen = 0;
$lineno = 0;
// Loop over each line in the file
while (!feof($fd)) {
$line = fgets($fd);
++$lineno;
// Nothing left on line? Then ignore...
if (trim($line) == '') {
continue;
}
$len = strlen($line);
$query_start = 0;
/**
* Parse line, looking for command separators.
*
* The current character is at line[i], the prior character at line[i
* - prevlen], the next character at line[i + thislen].
*/
$prevlen = 0;
$thislen = ($len > 0) ? 1 : 0;
for ($i = 0; $i < $len; $this->advance_1($i, $prevlen, $thislen)) {
/* was the previous character a backslash? */
if ($i > 0 && substr($line, $i - $prevlen, 1) == '\\') {
$this->prtrace('bslash_count', $bslash_count, $line);
++$bslash_count;
} else {
$bslash_count = 0;
}
/*
* It is important to place the in_* test routines before the
* in_* detection routines. i.e. we have to test if we are in
* a quote before testing for comments.
*/
/* in quote? */
if ($in_quote !== 0) {
//$this->prtrace('in_quote', $in_quote, $line);
/*
* end of quote if matching non-backslashed character.
* backslashes don't count for double quotes, though.
*/
if (substr($line, $i, 1) == $in_quote &&
($bslash_count % 2 == 0 || $in_quote == '"')
) {
$in_quote = 0;
}
} elseif ($dol_quote) {
$this->prtrace('dol_quote', $dol_quote, $line);
if (strncmp(substr($line, $i), $dol_quote, strlen($dol_quote)) == 0) {
$this->advance_1($i, $prevlen, $thislen);
while (substr($line, $i, 1) != '$') {
$this->advance_1($i, $prevlen, $thislen);
}
$dol_quote = '';
}
} elseif (substr($line, $i, 2) == '/*') {
$this->prtrace('open_xcomment', $in_xcomment, $line, $i, $prevlen, $thislen);
if ($in_xcomment == 0) {
++$in_xcomment;
$finishpos = strpos(substr($line, $i, $len), '*/');
if ($finishpos === false) {
$line = substr($line, 0, $i); /* remove comment */
break;
}
$pre = substr($line, 0, $i);
$post = substr($line, $i + 2 + $finishpos, $len);
$line = $pre.' '.$post;
$in_xcomment = 0;
$i = 0;
}
} elseif ($in_xcomment) {
$position = strpos(substr($line, $i, $len), '*/');
if ($position === false) {
$line = '';
break;
}
$substr = substr($line, $i, 2);
if ($substr == '*/' && !--$in_xcomment) {
$line = substr($line, $i + 2, $len);
$i += 2;
$this->advance_1($i, $prevlen, $thislen);
}
// old logic
// } else if (substr($line, $i, 2) == '/*') {
// if ($in_xcomment == 0) {
// ++$in_xcomment;
// $this->advance_1($i, $prevlen, $thislen);
// }
// } else if ($in_xcomment) {
// $substr = substr($line, $i, 2);
// if ($substr == '*/' && !--$in_xcomment) {
// $this->advance_1($i, $prevlen, $thislen);
// }
} elseif (substr($line, $i, 1) == '\'' || substr($line, $i, 1) == '"') {
$in_quote = substr($line, $i, 1);
} elseif (!$dol_quote && $this->valid_dolquote(substr($line, $i))) {
$dol_end = strpos(substr($line, $i + 1), '$');
$dol_quote = substr($line, $i, $dol_end + 1);
$this->advance_1($i, $prevlen, $thislen);
while (substr($line, $i, 1) != '$') {
$this->advance_1($i, $prevlen, $thislen);
}
} else {
if (substr($line, $i, 2) == '--') {
$line = substr($line, 0, $i); /* remove comment */
break;
} /* count nested parentheses */
if (substr($line, $i, 1) == '(') {
++$paren_level;
} elseif (substr($line, $i, 1) == ')' && $paren_level > 0) {
--$paren_level;
} elseif (substr($line, $i, 1) == ';' && !$bslash_count && !$paren_level) {
$subline = substr(substr($line, 0, $i), $query_start);
/*
* insert a cosmetic newline, if this is not the first
* line in the buffer
*/
if (strlen($query_buf) > 0) {
$query_buf .= "\n";
}
/* append the line to the query buffer */
$query_buf .= $subline;
/* is there anything in the query_buf? */
if (trim($query_buf)) {
$query_buf .= ';';
// Execute the query. PHP cannot execute
// empty queries, unlike libpq
$res = @pg_query($conn, $query_buf);
// Call the callback function for display
if ($callback !== null) {
$callback($query_buf, $res, $lineno);
}
// Check for COPY request
if (pg_result_status($res) == 4) {
// 4 == PGSQL_COPY_FROM
while (!feof($fd)) {
$copy = fgets($fd, 32768);
++$lineno;
pg_put_line($conn, $copy);
if ($copy == "\\.\n" || $copy == "\\.\r\n") {
pg_end_copy($conn);
break;
}
}
}
}
$query_buf = null;
$query_start = $i + $thislen;
} elseif (preg_match('/^[_[:alpha:]]$/', substr($line, $i, 1))) {
$sub = substr($line, $i, $thislen);
while (preg_match('/^[\$_A-Za-z0-9]$/', $sub)) {
/* keep going while we still have identifier chars */
$this->advance_1($i, $prevlen, $thislen);
$sub = substr($line, $i, $thislen);
}
// Since we're now over the next character to be examined, it is necessary
// to move back one space.
$i -= $prevlen;
}
}
} // end for
/* Put the rest of the line in the query buffer. */
$subline = substr($line, $query_start);
if ($in_quote || $dol_quote || strspn($subline, " \t\n\r") != strlen($subline)) {
if (strlen($query_buf) > 0) {
$query_buf .= "\n";
}
$query_buf .= $subline;
}
$line = null;
} // end while
$res = true;
/*
* Process query at the end of file without a semicolon, so long as
* it's non-empty.
*/
if (strlen($query_buf) > 0 && strspn($query_buf, " \t\n\r") != strlen($query_buf)) {
// Execute the query
$res = @pg_query($conn, $query_buf);
// Call the callback function for display
if ($callback !== null) {
$callback($query_buf, $res, $lineno);
}
// Check for COPY request
if (pg_result_status($res) == 4) {
// 4 == PGSQL_COPY_FROM
while (!feof($fd)) {
$copy = fgets($fd, 32768);
++$lineno;
pg_put_line($conn, $copy);
if ($copy == "\\.\n" || $copy == "\\.\r\n") {
pg_end_copy($conn);
break;
}
}
}
}
fclose($fd);
return $res;
}
/**
* A private helper method for executeScript that advances the
* character by 1. In psql this is careful to take into account
* multibyte languages, but we don't at the moment, so this function
* is someone redundant, since it will always advance by 1.
*
* @param int $i The current character position in the line
* @param int $prevlen Length of previous character (ie. 1)
* @param int $thislen Length of current character (ie. 1)
*/
protected function advance_1(&$i, &$prevlen, &$thislen)
{
$prevlen = $thislen;
$i += $thislen;
$thislen = 1;
}
/**
* Private helper method to detect a valid $foo$ quote delimiter at
* the start of the parameter dquote.
*
* @param string $dquote
*
* @return bool true if valid, false otherwise
*/
protected function valid_dolquote($dquote)
{
// XXX: support multibyte
return preg_match('/^[$][$]/', $dquote) || preg_match('/^[$][_[:alpha:]][_[:alnum:]]*[$]/', $dquote);
}
// Capabilities
/**
* Returns a recordset of all columns in a query. Supports paging.
*
* @param string $type Either 'QUERY' if it is an SQL query, or 'TABLE' if it is a table identifier,
* or 'SELECT" if it's a select query
* @param string $table The base table of the query. NULL for no table.
* @param string $query The query that is being executed. NULL for no query.
* @param string $sortkey The column number to sort by, or '' or null for no sorting
* @param string $sortdir The direction in which to sort the specified column ('asc' or 'desc')
* @param null|int $page The page of the relation to retrieve
* @param null|int $page_size The number of rows per page
* @param int $max_pages (return-by-ref) The max number of pages in the relation
*
* @return int|\PHPPgAdmin\ADORecordSet A recordset on success or an int with error code
* - -1 transaction error
* - -2 counting error
* - -3 page or page_size invalid
* - -4 unknown type
* - -5 failed setting transaction read only
*/
public function browseQuery($type, $table, $query, $sortkey, $sortdir, $page, $page_size, &$max_pages)
{
// Check that we're not going to divide by zero
if (!is_numeric($page_size) || $page_size != (int) $page_size || $page_size <= 0) {
return -3;
}
// If $type is TABLE, then generate the query
switch ($type) {
case 'TABLE':
if (preg_match('/^[0-9]+$/', $sortkey) && $sortkey > 0) {
$orderby = [$sortkey => $sortdir];
} else {
$orderby = [];
}
$query = $this->getSelectSQL($table, [], [], [], $orderby);
break;
case 'QUERY':
case 'SELECT':
// Trim query
$query = trim($query);
// Trim off trailing semi-colon if there is one
if (substr($query, strlen($query) - 1, 1) == ';') {
$query = substr($query, 0, strlen($query) - 1);
}
break;
default:
return -4;
}
// Generate count query
$count = "SELECT COUNT(*) AS total FROM (${query}) AS sub";
// Open a transaction
$status = $this->beginTransaction();
if ($status != 0) {
return -1;
}
// If backend supports read only queries, then specify read only mode
// to avoid side effects from repeating queries that do writes.
if ($this->hasReadOnlyQueries()) {
$status = $this->execute('SET TRANSACTION READ ONLY');
if ($status != 0) {
$this->rollbackTransaction();
return -5;
}
}
// Count the number of rows
$total = $this->browseQueryCount($count);
if ($total < 0) {
$this->rollbackTransaction();
return -2;
}
// Calculate max pages
$max_pages = ceil($total / $page_size);
// Check that page is less than or equal to max pages
if (!is_numeric($page) || $page != (int) $page || $page > $max_pages || $page < 1) {
$this->rollbackTransaction();
return -3;
}
// Set fetch mode to NUM so that duplicate field names are properly returned
// for non-table queries. Since the SELECT feature only allows selecting one
// table, duplicate fields shouldn't appear.
if ($type == 'QUERY') {
$this->conn->setFetchMode(ADODB_FETCH_NUM);
}
// Figure out ORDER BY. Sort key is always the column number (based from one)
// of the column to order by. Only need to do this for non-TABLE queries
if ($type != 'TABLE' && preg_match('/^[0-9]+$/', $sortkey) && $sortkey > 0) {
$orderby = " ORDER BY {$sortkey}";
// Add sort order
if ($sortdir == 'desc') {
$orderby .= ' DESC';
} else {
$orderby .= ' ASC';
}
} else {
$orderby = '';
}
// Actually retrieve the rows, with offset and limit
$rs = $this->selectSet("SELECT * FROM ({$query}) AS sub {$orderby} LIMIT {$page_size} OFFSET ".($page - 1) * $page_size);
$status = $this->endTransaction();
if ($status != 0) {
$this->rollbackTransaction();
return -1;
}
return $rs;
}
/**
* Generates the SQL for the 'select' function.
*
* @param string $table The table from which to select
* @param array $show An array of columns to show. Empty array means all columns.
* @param array $values An array mapping columns to values
* @param array $ops An array of the operators to use
* @param array $orderby (optional) An array of column numbers or names (one based)
* mapped to sort direction (asc or desc or '' or null) to order by
*
* @return string The SQL query
*/
public function getSelectSQL($table, $show, $values = [], $ops = [], $orderby = [])
{
$this->fieldArrayClean($show);
// If an empty array is passed in, then show all columns
if (sizeof($show) == 0) {
if ($this->hasObjectID($table)) {
$sql = "SELECT \"{$this->id}\", * FROM ";
} else {
$sql = 'SELECT * FROM ';
}
} else {
// Add oid column automatically to results for editing purposes
if (!in_array($this->id, $show, true) && $this->hasObjectID($table)) {
$sql = "SELECT \"{$this->id}\", \"";
} else {
$sql = 'SELECT "';
}
$sql .= join('","', $show).'" FROM ';
}
$this->fieldClean($table);
if (isset($_REQUEST['schema'])) {
$f_schema = $_REQUEST['schema'];
$this->fieldClean($f_schema);
$sql .= "\"{$f_schema}\".";
}
$sql .= "\"{$table}\"";
// If we have values specified, add them to the WHERE clause
$first = true;
if (is_array($values) && sizeof($values) > 0) {
foreach ($values as $k => $v) {
if ($v != '' || $this->selectOps[$ops[$k]] == 'p') {
$this->fieldClean($k);
if ($first) {
$sql .= ' WHERE ';
$first = false;
} else {
$sql .= ' AND ';
}
// Different query format depending on operator type
switch ($this->selectOps[$ops[$k]]) {
case 'i':
// Only clean the field for the inline case
// this is because (x), subqueries need to
// to allow 'a','b' as input.
$this->clean($v);
$sql .= "\"{$k}\" {$ops[$k]} '{$v}'";
break;
case 'p':
$sql .= "\"{$k}\" {$ops[$k]}";
break;
case 'x':
$sql .= "\"{$k}\" {$ops[$k]} ({$v})";
break;
case 't':
$sql .= "\"{$k}\" {$ops[$k]}('{$v}')";
break;
default:
// Shouldn't happen
}
}
}
}
// ORDER BY
if (is_array($orderby) && sizeof($orderby) > 0) {
$sql .= ' ORDER BY ';
$first = true;
foreach ($orderby as $k => $v) {
if ($first) {
$first = false;
} else {
$sql .= ', ';
}
if (preg_match('/^[0-9]+$/', $k)) {
$sql .= $k;
} else {
$this->fieldClean($k);
$sql .= '"'.$k.'"';
}
if (strtoupper($v) == 'DESC') {
$sql .= ' DESC';
}
}
}
return $sql;
}
/**
* Finds the number of rows that would be returned by a
* query.
*
* @param string $count The count query
*
* @return int|string The count of rows or -1 of no rows are found
*/
public function browseQueryCount($count)
{
return $this->selectField($count, 'total');
}
}
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