Database Access Object wrapper for PHP and PDO in a single class

PdoOne. It's a simple wrapper for PHP's PDO library.

This library is as fast as possible. Most of the operations are simple string/array managements.

[]() []() []() []() []()

Turn this

$stmt->bind_param("s", $_POST['name']);
$stmt->execute();
$result = $stmt->get_result();
if($result->num_rows === 0) exit('No rows');
while($row = $result->fetch_assoc()) {
  $ids[] = $row['id'];
  $names[] = $row['name'];
  $ages[] = $row['age'];
}
var_export($ages);
$stmt->close();

into this

$products=$dao
    ->select("*")
    ->from("myTable")
    ->where("name = ?",[$_POST['name']])
    ->toList();

Table of Content

• Database Access Object wrapper for PHP and PDO in a single class * Install (using composer) * Install (manually) * Usage + Start a connection + Run an unprepared query + Run a prepared query + Run a prepared query with parameters. + Return data (first method) + Return data (second method) + Running a transaction - startTransaction() - commit($throw=true) - rollback($throw=true) + Fields + throwOnError=true + isOpen=true * Custom Queries + tableExist($tableName) + statValue($tableName,$columnName) + columnTable($tablename) + foreignKeyTable($tableName) + createTable($tableName,$definition,$primaryKey=null,$extra='') * Query Builder (DQL) + select($columns) + count($sql,$arg='*') + min($sql,$arg='*') + max($sql,$arg='*') + sum($sql,$arg='*') + avg($sql,$arg='*') + distinct($distinct='distinct') + from($tables) + [where($where,[$arrayParameters=array()])](#where--where---arrayparameters-array----) + order($order) + group($group) + [having($having,[$arrayParameters])](#having--having---arrayparameters--) + runGen($returnArray=true) + toList($pdoMode) + toMeta() + toListSimple() + toResult() + firstScalar($colName=null) + first() + last() + sqlGen() * Query Builder (DML), i.e. insert, update,delete + [insert($table,$schema,[$values])](#insert--table--schema---values--) + [insertObject($table,[$declarativeArray],$excludeColumn=[])](#insertobject--table---declarativearray---excludecolumn----) + [update($$table,$schema,$values,[$schemaWhere],[$valuesWhere])](#update---table--schema--values---schemawhere----valueswhere--) + [delete([$table],[$schemaWhere],[$valuesWhere])](#delete---table----schemawhere----valueswhere--) * Sequence + Creating a sequence + Using the sequence + Creating a sequence without a table. + Benchmark (mysql, estimated) * Changelist

Install (using composer)

>

Add to composer.json the next requirement, then update composer.

  {
      "require": {
        "eftec/PdoOne": "^1.6"
      }
  }

or install it via cli using

> composer require eftec/PdoOne

Install (manually)

Just download the file lib/PdoOne.php and save it in a folder.

Usage

Start a connection

$dao=new PdoOne("mysql","127.0.0.1","root","abc.123","sakila","");
$dao->connect();

where * "mysql" is the mysql database. It also allows sqlsrv (for sql server) * 127.0.0.1 is the server where is the database. * root is the user * abc.123 is the password of the user root. * sakila is the database used. * "" (optional) it could be a log file, such as c:\temp\log.txt

Run an unprepared query

$sql="CREATE TABLE `product` (
    `idproduct` INT NOT NULL AUTO_INCREMENT,
    `name` VARCHAR(45) NULL,
    PRIMARY KEY (`idproduct`));";
$dao->runRawQuery($sql);  

Run a prepared query

$sql="insert into `product`(name) values(?)";
$stmt=$dao->prepare($sql);
$productName="Cocacola";
$stmt->bind_param("s",$productName); // s stand for string. Also i =integer, d = double and b=blob
$dao->runQuery($stmt);

> note: you could also insert using a procedural chain [insert($table,$schema,[$values])](#insert--table--schema---values--)

Run a prepared query with parameters.

$dao->runRawQuery('insert into `product` (name) values(?)'
    ,array('s','cocacola'));

Return data (first method)

It returns a mysqli_statement.

    $sql="select * from `product` order by name";
    $stmt=$dao->prepare($sql);
    $dao->runQuery($stmt);
    $rows = $stmt->get_result();
    while ($row = $rows->fetch_assoc()) {
        var_dump($row);
    }
    

> This statement must be processed manually.

Return data (second method)

It returns an associative array.

    $sql="select * from `product` order by name";
    $stmt=$dao->prepare($sql);
    $dao->runQuery($stmt);
    $rows = $stmt->get_result();
    $allRows=$rows->fetch_all(PDO::FETCH_ASSOC);
    var_dump($allRows);

Running a transaction

try {
    $sql="insert into `product`(name) values(?)";
    $dao->startTransaction();
    $stmt=$dao->prepare($sql);
    $productName="Fanta";
    $stmt->bind_param("s",$productName); 
    $dao->runQuery($stmt);
    $dao->commit(); // transaction ok
} catch (Exception $e) {
    $dao->rollback(false); // error, transaction cancelled.
}

startTransaction()

It starts a transaction

commit($throw=true)

It commits a transaction. * If $throw is true then it throws an exception if the transaction fails to commit. Otherwise, it does not.

rollback($throw=true)

It rollbacks a transaction. * If $throw is true then it throws an exception if the transaction fails to rollback. If false, then it ignores if the rollback fail or if the transaction is not open.

Fields

throwOnError=true

If true (default), then it throws an error if happens an error. If false, then the execution continues

isOpen=true

It is true if the database is connected otherwise,it's false.

Custom Queries

tableExist($tableName)

Returns true if the table exists (current database/schema)

statValue($tableName,$columnName)

Returns the stastictic (as an array) of a column of a table.

$stats=$dao->statValue('actor','actor_id');

| min | max | avg | sum | count | |-----|-----|----------|-------|-------| | 1 | 205 | 103.0000 | 21115 | 205 |

columnTable($tablename)

Returns all columns of a table

$result=$dao->columnTable('actor');

| colname | coltype | colsize | colpres | colscale | iskey | isidentity | |-------------|-----------|---------|---------|----------|-------|------------| | actor_id | smallint | | 5 | 0 | 1 | 1 | | first_name | varchar | 45 | | | 0 | 0 | | last_name | varchar | 45 | | | 0 | 0 | | last_update | timestamp | | | | 0 | 0 |

foreignKeyTable($tableName)

Returns all foreign keys of a table (source table)

createTable($tableName,$definition,$primaryKey=null,$extra='')

Creates a table using a definition and primary key.

$result=$dao->foreignKeyTable('actor');

| collocal | tablerem | colrem | |-------------|----------|-------------| | customer_id | customer | customer_id | | rental_id | rental | rental_id | | staff_id | staff | staff_id |

Query Builder (DQL)

You could also build a procedural query.

Example:

$results = $dao->select("*")->from("producttype")
    ->where('name=?', ['s', 'Cocacola'])
    ->where('idproducttype=?', ['i', 1])
    ->toList();   

select($columns)

Generates a select command.

$results = $dao->select("col1,col2"); //...

> Generates the query: select col1,col2 ....

$results = $dao->select("select * from table"); //->...

> Generates the query: select * from table ....

count($sql,$arg='*')

Generates a query that returns a count of values. It is a macro of the method select()

$result = $dao->count('from table where condition=1')->firstScalar(); // select count(*) from table where c..
$result = $dao->count('from table','col1')->firstScalar(); // select count(col1) from table

min($sql,$arg='*')

Generates a query that returns the minimum value of a column. If $arg is empty then it uses $sql for the name of the column It is a macro of the method select()

$result = $dao->min('from table where condition=1','col')->firstScalar(); // select min(col) from table where c..
$result = $dao->min('from table','col1')->firstScalar(); // select min(col1) from table
$result = $dao->min('','col1')->from('table')->firstScalar(); // select min(col1) from table
$result = $dao->min('col1')->from('table')->firstScalar(); // select min(col1) from table

max($sql,$arg='*')

Generates a query that returns the maximum value of a column. If $arg is empty then it uses $sql for the name of the column It is a macro of the method select()

$result = $dao->max('from table where condition=1','col')->firstScalar(); // select max(col) from table where c..
$result = $dao->max('from table','col1')->firstScalar(); // select max(col1) from table

sum($sql,$arg='*')

Generates a query that returns the sum value of a column. If $arg is empty then it uses $sql for the name of the column It is a macro of the method select()

$result = $dao->sum('from table where condition=1','col')->firstScalar(); // select sum(col) from table where c..
$result = $dao->sum('from table','col1')->firstScalar(); // select sum(col1) from table

avg($sql,$arg='*')

Generates a query that returns the average value of a column. If $arg is empty then it uses $sql for the name of the column It is a macro of the method select()

$result = $dao->avg('from table where condition=1','col')->firstScalar(); // select avg(col) from table where c..
$result = $dao->avg('from table','col1')->firstScalar(); // select avg(col1) from table

distinct($distinct='distinct')

Generates a select command.

$results = $dao->select("col1,col2")->distinct(); //...

> Generates the query: select distinct col1,col2 ....

>Note: ->distinct('unique') returns select unique ..

from($tables)

Generates a from command.

$results = $dao->select("*")->from('table'); //...

> Generates the query: select from table*

$tables could be a single table or a sql construction. For examp, the next command is valid:

$results = $dao->select("*")->from('table t1 inner join t2 on t1.c1=t2.c2'); //...

where($where,[$arrayParameters=array()])

Generates a where command.

• $where is an array or a string. If it's a string, then it's evaluated by using the parameters. if any

$results = $dao->select("*")
->from('table')
->where('p1=1'); //...

> Generates the query: select from table* where p1=1

> Note: ArrayParameters is an array as follow: type,value. > Where type is i=integer, d=double, s=string or b=blob. In case of doubt, use "s" > Example of arrayParameters: > ['i',1 ,'s','hello' ,'d',20.3 ,'s','world']

$results = $dao->select("*")
->from('table')
->where('p1=?',['i',1]); //...

> Generates the query: select from tablewhere p1=?(1)*

$results = $dao->select("*")
->from('table')
->where('p1=? and p2=?',['i',1,'s','hello']); //...

> Generates the query: select from tablewhere p1=?(1) and p2=?('hello')*

> Note. where could be nested.

$results = $dao->select("*")
->from('table')
->where('p1=?',['i',1])
->where('p2=?',['s','hello']); //...

> Generates the query: select from tablewhere p1=?(1) and p2=?('hello')*

You could also use:

$results = $dao->select("*")->from("table")
    ->where(['p1'=>'Coca-Cola','p2'=>1])
    ->toList();

> Generates the query: select from tablewhere p1=?(Coca-Cola) and p2=?(1)*

You could also use an associative array as argument and named parameters in the query

$results = $dao->select("*")->from("table")
    ->where('condition=:p1 and condition2=:p2',['p1'=>'Coca-Cola','p2'=>1])
    ->toList();

> Generates the query: select from tablewhere condition=?(Coca-Cola) and condition2=?(1)*

order($order)

Generates a order command.

$results = $dao->select("*")
->from('table')
->order('p1 desc'); //...

> Generates the query: select from tableorder by p1 desc*

group($group)

Generates a group command.

$results = $dao->select("*")
->from('table')
->group('p1'); //...

> Generates the query: select from tablegroup by p1*

having($having,[$arrayParameters])

Generates a group command.

$results = $dao->select("*")
->from('table')
->group('p1')
->having('p1>?',array('i',1)); //...

> Generates the query: select * from table group by p1 having p1>?(1)

> Note: Having could be nested having()->having() > Note: Having could be without parameters having('col>10')

runGen($returnArray=true)

Run the query generate.

>Note if returnArray is true then it returns an associative array. > if returnArray is false then it returns a mysqli_result >Note: It resets the current parameters (such as current select, from, where,etc.)

toList($pdoMode)

It's a macro of runGen. It returns an associative array or null.

$results = $dao->select("*")
->from('table')
->toList(); 

toMeta()

It returns a metacode of each columns of the query.

$results = $dao->select("*")
->from('table')
->toMeta(); 

result:

array(3) {
  [0]=>
  array(7) {
    ["native_type"]=>
    string(4) "LONG"
    ["pdo_type"]=>
    int(2)
    ["flags"]=>
    array(2) {
      [0]=>
      string(8) "not_null"
      [1]=>
      string(11) "primary_key"
    }
    ["table"]=>
    string(11) "producttype"
    ["name"]=>
    string(13) "idproducttype"
    ["len"]=>
    int(11)
    ["precision"]=>
    int(0)
  }
  [1]=>
  array(7) {
    ["native_type"]=>
    string(10) "VAR_STRING"
    ["pdo_type"]=>
    int(2)
    ["flags"]=>
    array(0) {
    }
    ["table"]=>
    string(11) "producttype"
    ["name"]=>
    string(4) "name"
    ["len"]=>
    int(135)
    ["precision"]=>
    int(0)
  }
}

toListSimple()

It's a macro of runGen. It returns an indexed array from the first column

$results = $dao->select("*")
->from('table')
->toListSimple(); // ['1','2','3','4']

toListKeyValue()

It returns an associative array where the first value is the key and the second is the value. If the second value does not exist then it uses the index as value (first value).

$results = $dao->select("cod,name")
->from('table')
->toListKeyValue(); // ['cod1'=>'name1','cod2'=>'name2']

toResult()

It's a macro of runGen. It returns a mysqli_result or null.

$results = $dao->select("*")
->from('table')
->toResult(); //

firstScalar($colName=null)

It returns the first scalar (one value) of a query. If $colName is null then it uses the first column.

$count=$this->pdoOne->count('from product_category')->firstScalar();

first()

It's a macro of runGen. It returns the first row if any, if not then it returns false, as an associative array.

$results = $dao->select("*")
->from('table')
->first(); 

last()

It's a macro of runGen. It returns the last row (if any, if not, it returns false) as an associative array.

$results = $dao->select("*")
->from('table')
->last(); 

> Sometimes is more efficient to run order() and first() because last() reads all values.

sqlGen()

It returns the sql command.

$sql = $dao->select("*")
->from('table')
->sqlGen();
echo $sql; // returns select * from table
$results=$dao->toList(); // executes the query

> Note: it doesn't reset the query.

Query Builder (DML), i.e. insert, update,delete

There are four ways to execute each command.

Let's say that we want to add an integer in the column col1 with the value 20

__Schema and values using a list of values__: Where the first value is the column, the second is the type of value (i=integer,d=double,s=string,b=blob) and second array contains the values.

$dao->insert("table"
    ,['col1','i']
    ,[20]);

__Schema and values in the same list__: Where the first value is the column, the second is the type of value (i=integer,d=double,s=string,b=blob) and the third is the value.

$dao->insert("table"
    ,['col1','i',20]);

__Schema and values using two associative arrays__:

$dao->insert("table"
    ,['col1'=>'i']
    ,['col1'=>20]);

__Schema and values using a single associative array__: The type is calculated automatically.

$dao->insert("table"
    ,['col1'=>20]);

insert($table,$schema,[$values])

Generates a insert command.

$dao->insert("producttype"
    ,['idproducttype','i','name','s','type','i']
    ,[1,'cocacola',1]);

Using nested chain (single array)

    $dao->from("producttype")
        ->set(['idproducttype','i',0 ,'name','s','Pepsi' ,'type','i',1])
        ->insert();

Using nested chain multiple set

    $dao->from("producttype")
        ->set("idproducttype=?",['i',101])
        ->set('name=?',['s','Pepsi'])
        ->set('type=?',['i',1])
        ->insert();

or (the type is defined, in the possible, automatically by MySql)

    $dao->from("producttype")
        ->set("idproducttype=?",['i',101])
        ->set('name=?','Pepsi')
        ->set('type=?',1)
        ->insert();

insertObject($table,[$declarativeArray],$excludeColumn=[])

    $dao->insertObject('table',['Id'=>1,'Name'=>'CocaCola']);

Using nested chain declarative set

    $dao->from("producttype")
        ->set('(idproducttype,name,type) values (?,?,?)',['i',100,'s','Pepsi','i',1])
        ->insert();

> Generates the query: insert into productype(idproducttype,name,type) values(?,?,?) ....

update($$table,$schema,$values,[$schemaWhere],[$valuesWhere])

Generates a insert command.

$dao->update("producttype"
    ,['name','s','type','i'] //set
    ,[6,'Captain-Crunch',2] //set
    ,['idproducttype','i'] // where
    ,[6]); // where

$dao->update("producttype"
    ,['name'=>'Captain-Crunch','type'=>2] // set
    ,['idproducttype'=>6]); // where

$dao->from("producttype")
    ->set("name=?",['s','Captain-Crunch']) //set
    ->set("type=?",['i',6]) //set
    ->where('idproducttype=?',['i',6]) // where
    ->update(); // update

or

$dao->from("producttype")
    ->set("name=?",'Captain-Crunch') //set
    ->set("type=?",6) //set
    ->where('idproducttype=?',['i',6]) // where
    ->update(); // update

> Generates the query: update producttype set name=?,type=? where idproducttype=? ....

delete([$table],[$schemaWhere],[$valuesWhere])

Generates a delete command.

$dao->delete("producttype"
    ,['idproducttype','i'] // where
    ,[7]); // where

$dao->delete("producttype"
    ,['idproducttype'=>7]); // where

> Generates the query: delete from producttype where idproducttype=? ....

You could also delete via a DQL builder chain.

$dao->from("producttype")
    ->where('idproducttype=?',['i',7]) // where
    ->delete(); 

$dao->from("producttype")
    ->where(['idproducttype'=>7]) // where
    ->delete(); 

> Generates the query: delete from producttype where idproducttype=? ....

Cache

It is possible to optionally cache the result of the queries. The duration of the query is also defined in the query. If the result of the query is not cached, then it is calculated normally (executing the query in the database. For identify a query as unique, the system generates an unique id (uid) based in sha256 created with the query, parameters, methods and the type of operation.

The library does not do any cache operation directly, instead it allows to cache the results using an external library.

• Cache works with the next methods. * toList() * toListSimple() * first() * firstScalar() * last()

How it works

(1) We need to define a class that implements \eftec\IPdoOneCache

class CacheService implements \eftec\IPdoOneCache {
    public $cacheData=[];
    public $cacheCounter=0; // for debug
    public  function getCache($uid,$family='') {
        if(isset($this->cacheData[$uid])) {
            $this->cacheCounter++;
            echo "using cache\n";
            return $this->cacheData[$uid];
        }
        return false;
    }
    public function setCache($uid,$family='',$data=null,$ttl=null) {
        
        $this->cacheData[$uid]=$data;
    }
    public function invalidateCache($uid = '', $family = '') {
        unset($this->cacheData[$uid]);
    }
}
$cache=new CacheService();

(2) Sets the cache service

    $pdoOne=new PdoOne("mysql","127.0.0.1","travis","","travisdb");
    $cache=new CacheService();
    $$pdoOne->setCacheService($cache);

(3) Use the cache as as follow, we must add the method useCache() in any part of the query.

    $pdoOne->select('select * from table')
        ->useCache()->toList(); // cache that never expires
    $pdoOne->select('select * from table')
        ->useCache(1000)->toList(); // cache that lasts 1000ms.

Example using apcu

class CacheService implements \eftec\IPdoOneCache {
    public  function getCache($uid,$family='') {
        return apcu_fetch($uid);
    }
    public function setCache($uid,$family='',$data=null,$ttl=null) {
        apcu_store($uid,$data,$ttl);
    }
    public function invalidateCache($uid = '', $family = '') {
        // invalidate cache
        apcu_delete($uid);
    }
}
$cache=new CacheService();

Sequence

Sequence is an alternative to AUTO_NUMERIC field. It uses a table to generate an unique ID. The sequence used is based on Twitter's Snowflake and it is generated based on time (with microseconds), Node Id and a sequence. This generates a LONG (int 64) value that it's unique

Creating a sequence

• $dao->nodeId set the node value (default is 1). If we want unique values amongst different clusters, then we could set the value of the node as unique. The limit is up to 1024 nodes.
• $dao->tableSequence it sets the table (and function), the default value is snowflake.

$dao->nodeId=1; // optional
$dao->tableSequence='snowflake'; // optional
$dao->createSequence(); // it creates a table called snowflake and a function called next_snowflake()

Using the sequence

• $dao->getSequence([unpredictable=false]) returns the last sequence. If the sequence fails to generate, then it returns -1. The function could fails if the function is called more than 4096 times every 1/1000th second.

$dao->getSequence() // string(19) "3639032938181434317" 

$dao->getSequence(true) // returns a sequence by flipping some values.

Creating a sequence without a table.

• $dao->getSequencePHP([unpredictable=false]) Returns a sequence without using a table. This sequence is more efficient than $dao->getSequence but it uses a random value to deals with collisions.
• If upredictable is true then it returns an unpredictable number (it flips some digits)

$dao->getSequencePHP() // string(19) "3639032938181434317" 

$dao->getSequencePHP(true) // string(19) "1739032938181434311" 

Benchmark (mysql, estimated)

| Library | Insert | findPk | hydrate | with | time | |-------------------------|--------|--------|---------|------|--------| | PDO | 671 | 60 | 278 | 887 | 3,74 | | PdoOne | 774 | 63 | 292 | 903 | 4,73 | | LessQL | 1413 | 133 | 539 | 825 | 5,984 | | YiiM | 2260 | 127 | 446 | 1516 | 8,415 | | YiiMWithCache | 1925 | 122 | 421 | 1547 | 7,854 | | Yii2M | 4344 | 208 | 632 | 1165 | 11,968 | | Yii2MArrayHydrate | 4114 | 213 | 531 | 1073 | 11,22 | | Yii2MScalarHydrate | 4150 | 198 | 421 | 516 | 9,537 | | Propel20 | 2507 | 123 | 1373 | 1960 | 11,781 | | Propel20WithCache | 1519 | 68 | 1045 | 1454 | 8,228 | | Propel20FormatOnDemand | 1501 | 72 | 994 | 1423 | 8,228 | | DoctrineM | 2119 | 250 | 1592 | 1258 | 18,139 | | DoctrineMWithCache | 2084 | 243 | 1634 | 1155 | 17,952 | | DoctrineMArrayHydrate | 2137 | 240 | 1230 | 877 | 16,83 | | DoctrineMScalarHydrate | 2084 | 392 | 1542 | 939 | 18,887 | | DoctrineMWithoutProxies | 2119 | 252 | 1432 | 1960 | 19,822 | | Eloquent | 3691 | 228 | 708 | 1413 | 12,155 |

PdoOne adds a bit of ovehead over PDO, however it is simple a wrapper to pdo.

Changelist

• 1.24 2020-03-26 * builderReset() is now public
• 1.23.1 2020-03-10 * Fixed a problem with the cache
• 1.23 2020-03-10 * method toMeta()
• 1.22 2020-02-08 * method invalidateCache() * changed the interface IPdoOneCache
• 1.21 2020-02-07 * method setCacheService() and getCacheService() * method useCache()
• 1.20 2020-jan-25 * Many cleanups. * update() and delete() now allows to set the query. * new method addDelimiter() to add delimiters to the query (i.e. 'table' for mysql and [table] for sql server)
• 1.19 2020-jan-15 * getSequence() now has a new argument (name of the sequence, optional) * createSequence() has a new argument (type of sequence) and it allows to create a sequential sequence. * objectexist() now is public and it allows to works with functions * Bug fixed: objectExist() now works correctly (used by tableExist()) * new DDL methods drop(), dropTable() and truncate()
• 1.16 2020-jan-14 * new method toListKeyValue()
• 1.15 2019-dec-29 * Fix small bug if the argument of isAssoc() is not an array.
• 1.14 2019-dec-26 * method where() works with associative array
• 1.13 2019-dec-26 * new method count() * new method sum() * new method min() * new method max() * new method avg() * method select now allows null definition. * obtainSqlFields() discontinued
• 1.12 2019-oct-20 Added argument (optional) ->toList($pdomodel) Added method ->toListSimple()
• 1.11 2019-oct-01 1.11 It is still compatible with php 5.6.Added to composer.json
• 1.10 2019-oct-01 1.10 Added method dateConvert(). Added trace to the throw.
• 1.9 2019-aug-10 1.8 republished
• 1.8 2019-aug-10 Added a date format. Methods dateSql2Text() and dateText2Sql()
• 1.7 2019-jun-23 Added some benchmark. It also solves a problem with the tags. Now: table.field=? is converted to table.field=?
• 1.6 2019-jun-22 affected_rows() returns a correct value.
• 1.5 2019-may-31 some cleanups. columnTable() returns if the column is nullable or not.
• 1.4 2019-may-30 insertobject()
• 1.3 2019-may-23 New changes
• 1.2 2019-may-22 New fixed.
• 1.1 2019-may-21 Some maintenance
• 1.0 2019-may-21 First version