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views instead of temp. tables can be used

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This commit is contained in:
Uwe Steinmann 2017-11-21 11:28:49 +01:00
parent b29f7b1e9c
commit 8af798fe86
1 changed files with 221 additions and 4 deletions
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219
SeedDMS_Core/Core/inc.DBAccessPDO.php
View File

@ -102,6 +102,11 @@ class SeedDMS_Core_DatabaseAccess {
*/
private $_logfp;
/**
* @var boolean set to true if views instead of temp. tables shall be used
*/
private $_useviews;
/**
* Return list of all database tables
*
@ -130,6 +135,34 @@ class SeedDMS_Core_DatabaseAccess {
return $res;
} /* }}} */
/**
* Return list of all database views
*
* This function is used to retrieve a list of database views
*
* @return array list of view names
*/
public function ViewList() { /* {{{ */
switch($this->_driver) {
case 'mysql':
$sql = "select TABLE_NAME as name from information_schema.views where TABLE_SCHEMA='".$this->_database."'";
break;
case 'sqlite':
$sql = "select tbl_name as name from sqlite_master where type='view'";
break;
case 'pgsql':
$sql = "select viewname as name from pg_catalog.pg_views where schemaname='public'";
break;
default:
return false;
}
$arr = $this->getResultArray($sql);
$res = array();
foreach($arr as $tmp)
$res[] = $tmp['name'];
return $res;
} /* }}} */
/**
* Constructor of SeedDMS_Core_DatabaseAccess
*
@ -171,6 +204,7 @@ class SeedDMS_Core_DatabaseAccess {
$this->_ttapproveid = false;
$this->_ttstatid = false;
$this->_ttcontentid = false;
$this->_useviews = true;
$this->_debug = false;
} /* }}} */
@ -221,11 +255,22 @@ class SeedDMS_Core_DatabaseAccess {
$this->_conn->exec('SET NAMES utf8');
/* Turn this on if you want strict checking of default values, etc. */
// $this->_conn->exec("SET SESSION sql_mode = 'STRICT_TRANS_TABLES'");
/* The following is the default on Ubuntu 16.04 */
// $this->_conn->exec("SET SESSION sql_mode = 'ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION'");
break;
case 'sqlite':
$this->_conn->exec('PRAGMA foreign_keys = ON');
break;
}
if($this->_useviews) {
$tmp = $this->ViewList();
foreach(array('ttreviewid', 'ttapproveid', 'ttstatid', 'ttcontentid') as $viewname) {
if(in_array($viewname, $tmp)) {
$this->{"_".$viewname} = true;
}
}
}
$this->_connected = true;
return true;
} /* }}} */
@ -365,7 +410,7 @@ class SeedDMS_Core_DatabaseAccess {
/**
* Create various temporary tables to speed up and simplify sql queries
*/
function createTemporaryTable($tableName, $override=false) { /* {{{ */
private function __createTemporaryTable($tableName, $override=false) { /* {{{ */
if (!strcasecmp($tableName, "ttreviewid")) {
switch($this->_driver) {
case 'sqlite':
@ -533,6 +578,178 @@ class SeedDMS_Core_DatabaseAccess {
return false;
} /* }}} */
/**
* Create various temporary tables to speed up and simplify sql queries
*/
private function __createView($tableName, $override=false) { /* {{{ */
if (!strcasecmp($tableName, "ttreviewid")) {
switch($this->_driver) {
case 'sqlite':
$queryStr = "CREATE VIEW `ttreviewid` AS ".
"SELECT `tblDocumentReviewLog`.`reviewID` AS `reviewID`, ".
"MAX(`tblDocumentReviewLog`.`reviewLogID`) AS `maxLogID` ".
"FROM `tblDocumentReviewLog` ".
"GROUP BY `tblDocumentReviewLog`.`reviewID` "; //.
break;
case 'pgsql':
$queryStr = "CREATE VIEW `ttreviewid` AS ".
"SELECT `tblDocumentReviewLog`.`reviewID` AS `reviewID`, ".
"MAX(`tblDocumentReviewLog`.`reviewLogID`) AS `maxLogID` ".
"FROM `tblDocumentReviewLog` ".
"GROUP BY `tblDocumentReviewLog`.`reviewID` ";
break;
default:
$queryStr = "CREATE".($override ? " OR REPLACE" : "")." VIEW `ttreviewid` AS ".
"SELECT `tblDocumentReviewLog`.`reviewID` AS `reviewID`, ".
"MAX(`tblDocumentReviewLog`.`reviewLogID`) AS `maxLogID` ".
"FROM `tblDocumentReviewLog` ".
"GROUP BY `tblDocumentReviewLog`.`reviewID` ";
}
if (!$this->_ttreviewid) {
if (!$this->getResult($queryStr))
return false;
$this->_ttreviewid=true;
}
else {
if (is_bool($override) && $override) {
if (!$this->getResult("DROP VIEW `ttreviewid`"))
return false;
if (!$this->getResult($queryStr))
return false;
}
}
return $this->_ttreviewid;
}
elseif (!strcasecmp($tableName, "ttapproveid")) {
switch($this->_driver) {
case 'sqlite':
$queryStr = "CREATE VIEW `ttapproveid` AS ".
"SELECT `tblDocumentApproveLog`.`approveID` AS `approveID`, ".
"MAX(`tblDocumentApproveLog`.`approveLogID`) AS `maxLogID` ".
"FROM `tblDocumentApproveLog` ".
"GROUP BY `tblDocumentApproveLog`.`approveID` "; //.
break;
case 'pgsql':
$queryStr = "CREATE VIEW `ttapproveid` AS ".
"SELECT `tblDocumentApproveLog`.`approveID` AS `approveID`, ".
"MAX(`tblDocumentApproveLog`.`approveLogID`) AS `maxLogID` ".
"FROM `tblDocumentApproveLog` ".
"GROUP BY `tblDocumentApproveLog`.`approveID` ";
break;
default:
$queryStr = "CREATE".($override ? " OR REPLACE" : "")." VIEW `ttapproveid` AS ".
"SELECT `tblDocumentApproveLog`.`approveID`, ".
"MAX(`tblDocumentApproveLog`.`approveLogID`) AS `maxLogID` ".
"FROM `tblDocumentApproveLog` ".
"GROUP BY `tblDocumentApproveLog`.`approveID` ";
}
if (!$this->_ttapproveid) {
if (!$this->getResult($queryStr))
return false;
$this->_ttapproveid=true;
}
else {
if (is_bool($override) && $override) {
if (!$this->getResult("DROP VIEW `ttapproveid`"))
return false;
if (!$this->getResult($queryStr))
return false;
}
}
return $this->_ttapproveid;
}
elseif (!strcasecmp($tableName, "ttstatid")) {
switch($this->_driver) {
case 'sqlite':
$queryStr = "CREATE VIEW `ttstatid` AS ".
"SELECT `tblDocumentStatusLog`.`statusID` AS `statusID`, ".
"MAX(`tblDocumentStatusLog`.`statusLogID`) AS `maxLogID` ".
"FROM `tblDocumentStatusLog` ".
"GROUP BY `tblDocumentStatusLog`.`statusID` ";
break;
case 'pgsql':
$queryStr = "CREATE VIEW `ttstatid` AS ".
"SELECT `tblDocumentStatusLog`.`statusID` AS `statusID`, ".
"MAX(`tblDocumentStatusLog`.`statusLogID`) AS `maxLogID` ".
"FROM `tblDocumentStatusLog` ".
"GROUP BY `tblDocumentStatusLog`.`statusID` ";
break;
default:
$queryStr = "CREATE".($override ? " OR REPLACE" : "")." VIEW `ttstatid` AS ".
"SELECT `tblDocumentStatusLog`.`statusID`, ".
"MAX(`tblDocumentStatusLog`.`statusLogID`) AS `maxLogID` ".
"FROM `tblDocumentStatusLog` ".
"GROUP BY `tblDocumentStatusLog`.`statusID` ";
}
if (!$this->_ttstatid) {
if (!$this->getResult($queryStr))
return false;
$this->_ttstatid=true;
}
else {
if (is_bool($override) && $override) {
if (!$this->getResult("DROP VIEW `ttstatid`"))
return false;
if (!$this->getResult($queryStr))
return false;
}
}
return $this->_ttstatid;
}
elseif (!strcasecmp($tableName, "ttcontentid")) {
switch($this->_driver) {
case 'sqlite':
$queryStr = "CREATE VIEW `ttcontentid` AS ".
"SELECT `tblDocumentContent`.`document` AS `document`, ".
"MAX(`tblDocumentContent`.`version`) AS `maxVersion` ".
"FROM `tblDocumentContent` ".
"GROUP BY `tblDocumentContent`.`document` ".
"ORDER BY `tblDocumentContent`.`document`";
break;
case 'pgsql':
$queryStr = "CREATE VIEW `ttcontentid` AS ".
"SELECT `tblDocumentContent`.`document` AS `document`, ".
"MAX(`tblDocumentContent`.`version`) AS `maxVersion` ".
"FROM `tblDocumentContent` ".
"GROUP BY `tblDocumentContent`.`document` ".
"ORDER BY `tblDocumentContent`.`document`";
break;
default:
$queryStr = "CREATE".($override ? " OR REPLACE" : "")." VIEW `ttcontentid` AS ".
"SELECT `tblDocumentContent`.`document`, ".
"MAX(`tblDocumentContent`.`version`) AS `maxVersion` ".
"FROM `tblDocumentContent` ".
"GROUP BY `tblDocumentContent`.`document` ".
"ORDER BY `tblDocumentContent`.`document`";
}
if (!$this->_ttcontentid) {
if (!$this->getResult($queryStr))
return false;
$this->_ttcontentid=true;
}
else {
if (is_bool($override) && $override) {
if (!$this->getResult("DROP VIEW `ttcontentid`"))
return false;
if (!$this->getResult($queryStr))
return false;
}
}
return $this->_ttcontentid;
}
return false;
} /* }}} */
/**
* Create various temporary tables to speed up and simplify sql queries
*/
public function createTemporaryTable($tableName, $override=false) { /* {{{ */
if($this->_useviews)
return $this->__createView($tableName, $override);
else
return $this->__createTemporaryTable($tableName, $override);
} /* }}} */
/**
* Return sql statement for extracting the date part from a field
* containing a unix timestamp