PostgreSQL layer for DBO.
$_baseConfig
protected array
$_sequenceMap
protected array
Contains mappings of custom auto-increment sequences, if a table uses a sequence name other than what is dictated by convention.
$_sqlOps
protected array
$columns
public array
$description
public string
$endQuote
public string
$startQuote
public string
_connection
, _methodCacheChange
, _queriesCnt
, _queriesLog
, _queriesLogMax
, _queriesTime
, _queryCache
, _queryDefaults
, _result
, _sqlBoolOps
, _transactionNesting
, affected
, alias
, cacheMethods
, configKeyName
, fieldParameters
, fullDebug
, index
, methodCache
, numRows
, tableParameters
, took
, useNestedTransactions
, virtualFieldSeparator
_descriptions
, _sources
, _transactionStarted
, cacheSources
, config
, connected
Auxiliary function to quote matched (Model.fields)
from a preg_replace_callback call Quotes the fields in a function call.
Reset a sequence based on the MAX() value of $column. Useful for resetting sequences after using insertMulti().
_alterIndexes( string $table , array $indexes )
Generate PostgreSQL index alteration statements for a table.
$table
$indexes
_quoteFunctionField( string $match )
Auxiliary function to quote matched (Model.fields)
from a preg_replace_callback call Quotes the fields in a function call.
$match
alterSchema( array $compare , string $table null )
Alter the Schema of a table.
$compare
$table
optional null DboSource::alterSchema()
boolean( mixed $data , boolean $quote false )
Translates between PHP boolean values and PostgreSQL boolean values
$data
$quote
optional false DboSource::boolean()
buildColumn( array $column )
Generate a Postgres-native column schema string
$column
An array structured like the following: array('name'=>'value', 'type'=>'value'[, options]), where options can be 'default', 'length', or 'key'.
DboSource::buildColumn()
buildIndex( array $indexes , string $table null )
Format indexes for create table
$indexes
$table
optional null DboSource::buildIndex()
column( string $real )
Converts database-layer column types to basic types
$real
DataSource::column()
connect( )
Connects to the database using options in the given configuration array.
MissingConnectionException
describe( Model|string $model )
Returns an array of the fields in given table name.
Model
|string $model
DataSource::describe()
enabled( )
Check if PostgreSQL is enabled/loaded
DataSource::enabled()
fetchResult( )
Fetches the next row from the current result set
DboSource::fetchResult()
fields( Model $model , string $alias null , mixed $fields array() , boolean $quote true )
Generates the fields list of an SQL query.
Model
$model
$alias
optional null $fields
optional array() $quote
optional true DboSource::fields()
getEncoding( )
Gets the database encoding
getSchemaName( )
Gets the schema name
DataSource::getSchemaName()
getSequence( string|Model $table , string $field 'id' )
Gets the associated sequence for the given table/field
Model
$table
$field
optional 'id' index( string $model )
Returns an array of the indexes in given datasource name.
$model
DboSource::index()
lastInsertId( string $source null , string $field 'id' )
Returns the ID generated from the previous INSERT operation.
$source
optional null $field
optional 'id' DboSource::lastInsertId()
length( string $real )
Gets the length of a database-native column description, or null if no length
$real
DboSource::length()
limit( integer $limit , integer $offset null )
Returns a limit statement in the correct format for the particular database.
$limit
$offset
optional null DboSource::limit()
listSources( mixed $data null )
Returns an array of tables in the database. If there are no tables, an error is raised and the application exits.
$data
optional null DataSource::listSources()
name( string $data )
Prepares field names to be quoted by parent
$data
DboSource::name()
nestedTransactionSupported( )
Check if the server support nested transactions
DboSource::nestedTransactionSupported()
renderStatement( string $type , array $data )
Overrides DboSource::renderStatement to handle schema generation with Postgres-style indexes
$type
$data
DboSource::renderStatement()
resetSequence( string $table , string $column )
Reset a sequence based on the MAX() value of $column. Useful for resetting sequences after using insertMulti().
$table
$column
The column to use when resetting the sequence value, the sequence name will be fetched using Postgres::getSequence();
DboSource::resetSequence()
resultSet( array $results )
resultSet method
$results
setEncoding( mixed $enc )
Sets the database encoding
$enc
truncate( string|Model $table , boolean $reset false )
Deletes all the records in a table and drops all associated auto-increment sequences
Model
$table
$reset
optional false true for resetting the sequence, false to leave it as is. and if 1, sequences are not modified
DboSource::truncate()
value( string $data , string $column null , boolean $null true )
Returns a quoted and escaped string of $data for use in an SQL statement.
$data
$column
optional null $null
optional true DboSource::value()
__construct( array $config null , boolean $autoConnect true )
Constructor
$config
optional null $autoConnect
optional true MissingConnectionException
DataSource::__construct()
__destruct( )
Used for storing in cache the results of the in-memory methodCache
DataSource::__destruct()
_buildFieldParameters( string $columnString , array $columnData , string $position )
Build the field parameters, in a position
$columnString
$columnData
$position
_constructVirtualFields( Model $Model , string $alias , array $fields )
Converts model virtual fields into sql expressions to be fetched later
Model
$Model
$alias
$fields
_dropTable( type $table )
Generate a "drop table" statement for a single table
$table
_execute( string $sql , array $params array() , array $prepareOptions array() )
Executes given SQL statement.
$sql
$params
optional array() $prepareOptions
optional array() PDOStatement if query executes with no problem, true as the result of a successful, false on error query returning no rows, such as a CREATE statement, false otherwise
_fetchHasAndBelongsToMany( Model $Model , string $query , array $ids , string $association )
Fetch 'hasAndBelongsToMany' associations.
Model
$Model
$query
$ids
$association
_fetchHasMany( Model $Model , string $query , array $ids )
Fetch 'hasMany' associations.
Model
$Model
$query
$ids
_filterResults( array $resultSet , Model $Model , array $filtered array() )
Passes association results through afterFind filters of the corresponding model.
The primary model is always excluded, because the filtering is later done by Model::_filterResults().
$resultSet
Model
$Model
$filtered
optional array() _filterResultsInclusive( array $resultSet , Model $Model , array $toBeFiltered array() )
Passes association results through afterFind filters of the corresponding model.
Similar to DboSource::_filterResults(), but this filters only specified models. The primary model can not be specified, because this call DboSource::_filterResults() internally.
$resultSet
Model
$Model
$toBeFiltered
optional array() _getJoins( Model $Model )
Returns an array of SQL JOIN conditions from a model's associations.
Model
$Model
_matchRecords( Model $Model , mixed $conditions null )
Gets a list of record IDs for the given conditions. Used for multi-record updates and deletes in databases that do not support aliases in UPDATE/DELETE queries.
Model
$Model
$conditions
optional null _mergeAssociation( array $data , array $merge , string $association , string $type , boolean $selfJoin false )
Merge association of merge into data
$data
$merge
$association
$type
$selfJoin
optional false _mergeConditions( mixed $query , mixed $assoc )
Merges a mixed set of string/array conditions.
$query
$assoc
_mergeHasMany( array $resultSet , array $assocResultSet , string $association , Model $Model )
Merge the results of 'hasMany' associations.
Note: this function also deals with the formatting of the data.
$resultSet
$assocResultSet
$association
Model
$Model
_parseKey( string $key , mixed $value , Model $Model null )
Extracts a Model.field identifier and an SQL condition operator from a string, formats and inserts values, and composes them into an SQL snippet.
$key
$value
Model
$Model
optional null _prepareUpdateFields( Model $Model , array $fields , boolean $quoteValues true , boolean $alias false )
Quotes and prepares fields and values for an SQL UPDATE statement
Model
$Model
$fields
$quoteValues
optional true $alias
optional false _quoteFields( string $conditions )
Quotes Model.fields
$conditions
_quoteMatchedField( string $match )
Auxiliary function to quote matches Model.fields
from a preg_replace_callback call
$match
_scrubQueryData( array $data )
Private helper method to remove query metadata in given data array.
$data
_writeQueryCache( string $sql , mixed $data , array $params array() )
Writes a new key for the in memory sql query cache
$sql
$data
$params
optional array() begin( )
Begin a transaction
True on success, false on fail (i.e. if the database/model does not support transactions, or a transaction has not started).
DataSource::begin()
buildAssociationQuery( Model $Model , array $queryData )
Builds an SQL statement.
This is merely a convenient wrapper to DboSource::buildStatement().
Model
$Model
$queryData
buildJoinStatement( array $join )
Builds and generates a JOIN condition from an array. Handles final clean-up before conversion.
$join
buildStatement( array $query , Model $Model )
Builds and generates an SQL statement from an array. Handles final clean-up before conversion.
$query
Model
$Model
buildTableParameters( array $parameters , string $table null )
Format parameters for create table
$parameters
$table
optional null cacheMethod( string $method , string $key , mixed $value null )
Cache a value into the methodCaches. Will respect the value of DboSource::$cacheMethods. Will retrieve a value from the cache if $value is null.
If caching is disabled and a write is attempted, the $value will be returned. A read will either return the value or null.
$method
$key
$value
optional null calculate( Model $Model , string $func , array $params array() )
Returns an SQL calculation, i.e. COUNT() or MAX()
Model
$Model
$func
$params
optional array() close( )
Disconnects database, kills the connection and says the connection is closed.
DataSource::close()
commit( )
Commit a transaction
True on success, false on fail (i.e. if the database/model does not support transactions, or a transaction has not started).
DataSource::commit()
conditionKeysToString( array $conditions , boolean $quoteValues true , Model $Model null )
Creates a WHERE clause by parsing given conditions array. Used by DboSource::conditions().
$conditions
$quoteValues
optional true Model
$Model
optional null conditions( mixed $conditions , boolean $quoteValues true , boolean $where true , Model $Model null )
Creates a WHERE clause by parsing given conditions data. If an array or string conditions are provided those conditions will be parsed and quoted. If a boolean is given it will be integer cast as condition. Null will return 1 = 1.
Results of this method are stored in a memory cache. This improves performance, but because the method uses a hashing algorithm it can have collisions. Setting DboSource::$cacheMethods to false will disable the memory cache.
$conditions
$quoteValues
optional true $where
optional true Model
$Model
optional null create( Model $Model , array $fields null , array $values null )
The "C" in CRUD
Creates new records in the database.
Model
$Model
$fields
optional null An array of field names to insert. If null, $Model->data will be used to generate field names.
$values
optional null An array of values with keys matching the fields. If null, $Model->data will be used to generate values.
DataSource::create()
createSchema( CakeSchema $schema , string $tableName null )
Generate a database-native schema for the given Schema object
CakeSchema
$schema
$tableName
optional null Optional. If specified only the table name given will be generated. Otherwise, all tables defined in the schema are generated.
defaultConditions( Model $Model , string|array|boolean $conditions , boolean $useAlias true )
Creates a default set of conditions from the model if $conditions is null/empty. If conditions are supplied then they will be returned. If a model doesn't exist and no conditions were provided either null or false will be returned based on what was input.
Model
$Model
$conditions
Array of conditions, conditions string, null or false. If an array of conditions, or string conditions those conditions will be returned. With other values the model's existence will be checked. If the model doesn't exist a null or false will be returned depending on the input value.
$useAlias
optional true delete( Model $Model , mixed $conditions null )
Generates and executes an SQL DELETE statement. For databases that do not support aliases in UPDATE queries.
Model
$Model
$conditions
optional null DataSource::delete()
dropSchema( CakeSchema $schema , string $table null )
Generate a "drop table" statement for the given Schema object
CakeSchema
$schema
$table
optional null Optional. If specified only the table name given will be generated. Otherwise, all tables defined in the schema are generated.
execute( string $sql , array $options array() , array $params array() )
Queries the database with given SQL statement, and obtains some metadata about the result (rows affected, timing, any errors, number of rows in resultset). The query is also logged. If Configure::read('debug') is set, the log is shown all the time, else it is only shown on errors.
$sql
$options
optional array() $params
optional array() expression( string $expression )
Returns an object to represent a database expression in a query. Expression objects are not sanitized or escaped.
$expression
fetchAll( string $sql , array|boolean $params array() , array $options array() )
Returns an array of all result rows for a given SQL query.
Returns false if no rows matched.
cache
- Returns the cached version of the query, if exists and stores the result in cache. This is a non-persistent cache, and only lasts for a single request. This option defaults to true. If you are directly calling this method, you can disable caching by setting $options to false
$sql
$params
optional array() Either parameters to be bound as values for the SQL statement, or a boolean to control query caching.
$options
optional array() fetchAssociated( Model $Model , string $query , array $ids )
Fetch 'hasMany' associations.
This is just a proxy to maintain BC.
Model
$Model
$query
$ids
fetchRow( string $sql null )
Returns a row from current resultset as an array
$sql
optional null fetchVirtualField( array $result )
Modifies $result array to place virtual fields in model entry where they belongs to
$result
field( string $name , string $sql )
Returns a single field of the first of query results for a given SQL query, or false if empty.
$name
$sql
flushMethodCache( )
Empties the method caches. These caches are used by DboSource::name() and DboSource::conditions()
fullTableName( Model|string $model , boolean $quote true , boolean $schema true )
Gets full table name including prefix
Model
|string $model
$quote
optional true $schema
optional true generateAssociationQuery( Model $Model , Model|null $LinkModel , string $type , string $association , array $assocData , array $queryData , boolean $external )
Generates a query or part of a query from a single model or two associated models.
Builds a string containing an SQL statement template.
Model
$Model
Model
|null $LinkModel
$type
$association
$assocData
$queryData
$external
String representing a query. True, when $external is false and association $type is 'hasOne' or 'belongsTo'.
getConstraint( string $type , Model $Model , Model $LinkModel , string $association , array $assocData , string $association2 null )
Returns a conditions array for the constraint between two models.
$type
Model
$Model
Model
$LinkModel
$association
$assocData
$association2
optional null getLog( boolean $sorted false , boolean $clear true )
Get the query log as an array.
$sorted
optional false $clear
optional true getQueryCache( string $sql , array $params array() )
Returns the result for a sql query if it is already cached
$sql
$params
optional array() getVersion( )
Gets the version string of the database server
group( string|array $fields , Model $Model null )
Create a GROUP BY SQL clause.
$fields
Model
$Model
optional null hasAny( Model $Model , string $sql )
Checks if the specified table contains any record matching specified SQL
Model
$Model
$sql
hasResult( )
Checks if the result is valid
identifier( string $identifier )
Returns an object to represent a database identifier in a query. Expression objects are not sanitized or escaped.
$identifier
insertMulti( string $table , array $fields , array $values )
Inserts multiple values into a table
$table
$fields
$values
The array of values to insert. The values should be an array of rows. Each row should have values keyed by the column name. Each row must have the values in the same order as $fields.
introspectType( string $value )
Guesses the data type of an array
$value
isConnected( )
Checks if the source is connected to the database.
lastAffected( mixed $source null )
Returns number of affected rows in previous database operation. If no previous operation exists, this returns false.
$source
optional null DataSource::lastAffected()
lastError( PDOStatement $query null )
Returns a formatted error message from previous database operation.
$query
optional null lastNumRows( mixed $source null )
Returns number of rows in previous resultset. If no previous resultset exists, this returns false.
$source
optional null DataSource::lastNumRows()
logQuery( string $sql , array $params array() )
Log given SQL query.
$sql
$params
optional array() order( array|string $keys , string $direction 'ASC' , Model $Model null )
Returns an ORDER BY clause as a string.
$keys
$direction
optional 'ASC' Model
$Model
optional null prepareFields( Model $Model , array $queryData )
Prepares fields required by an SQL statement.
When no fields are set, all the $Model fields are returned.
Model
$Model
$queryData
query( )
DataSource Query abstraction
queryAssociation( Model $Model , Model $LinkModel , string $type , string $association , array $assocData , array $queryData , boolean $external , array $resultSet , integer $recursive , array $stack )
Queries associations.
Used to fetch results on recursive models.
'hasMany' associations with no limit set: Fetch, filter and merge is done recursively for every level.
'hasAndBelongsToMany' associations: Fetch and filter is done unaffected by the (recursive) level set.
Model
$Model
Model
$LinkModel
$type
$association
$assocData
$queryData
$external
$resultSet
$recursive
$stack
CakeException
rawQuery( string $sql , array $params array() )
Executes given SQL statement.
$sql
$params
optional array() read( Model $Model , array $queryData array() , integer $recursive null )
The "R" in CRUD
Reads record(s) from the database.
Model
$Model
$queryData
optional array() $recursive
optional null DataSource::read()
readTableParameters( string $name )
Read additional table parameters
$name
reconnect( array $config array() )
Reconnects to database server with optional new settings
$config
optional array() renderJoinStatement( array $data )
Renders a final SQL JOIN statement
$data
resolveKey( Model $Model , string $key , string $assoc null )
Returns a key formatted like a string Model.fieldname(i.e. Post.title, or Country.name)
Model
$Model
$key
$assoc
optional null DataSource::resolveKey()
rollback( )
Rollback a transaction
True on success, false on fail (i.e. if the database/model does not support transactions, or a transaction has not started).
DataSource::rollback()
showLog( boolean $sorted false )
Outputs the contents of the queries log. If in a non-CLI environment the sql_log element will be rendered and output. If in a CLI environment, a plain text log is generated.
$sorted
optional false update( Model $Model , array $fields array() , array $values null , mixed $conditions null )
Generates and executes an SQL UPDATE statement for given model, fields, and values. For databases that do not support aliases in UPDATE queries.
Model
$Model
$fields
optional array() $values
optional null $conditions
optional null DataSource::update()
_cacheDescription( string $object , mixed $data null )
Cache the DataSource description
$object
$data
optional null insertQueryData( string $query , array $data , string $association , Model $Model , array $stack )
Replaces {$__cakeID__$}
and {$__cakeForeignKey__$}
placeholders in query data.
$query
$data
$association
Model
$Model
$stack
setConfig( array $config array() )
Sets the configuration for the DataSource. Merges the $config information with the _baseConfig and the existing $config property.
$config
optional array() _mergeVars( array $properties , string $class , boolean $normalize true )
Merges this objects $property with the property in $class' definition. This classes value for the property will be merged on top of $class'
This provides some of the DRY magic CakePHP provides. If you want to shut it off, redefine this method as an empty function.
$properties
$class
$normalize
optional true _set( array $properties array() )
Allows setting of multiple properties of the object in a single line of code. Will only set properties that are part of a class declaration.
$properties
optional array() _stop( integer|string $status 0 )
Stop execution of the current script. Wraps exit() making testing easier.
$status
optional 0 dispatchMethod( string $method , array $params array() )
Calls a method on this object with the given parameters. Provides an OO wrapper for call_user_func_array
$method
$params
optional array() log( string $msg , integer $type LOG_ERR , null|string|array $scope null )
Convenience method to write a message to CakeLog. See CakeLog::write() for more information on writing to logs.
$msg
$type
optional LOG_ERR $scope
optional null The scope(s) a log message is being created in. See CakeLog::config() for more information on logging scopes.
requestAction( string|array $url , array $extra array() )
Calls a controller's method from any location. Can be used to connect controllers together or tie plugins into a main application. requestAction can be used to return rendered views or fetch the return value from controller actions.
Under the hood this method uses Router::reverse() to convert the $url parameter into a string URL. You should use URL formats that are compatible with Router::reverse()
POST and GET data can be simulated in requestAction. Use $extra['url']
for GET data. The $extra['data']
parameter allows POST data simulation.
$url
String or array-based URL. Unlike other URL arrays in CakePHP, this URL will not automatically handle passed and named arguments in the $url parameter.
$extra
optional array() if array includes the key "return" it sets the AutoRender to true. Can also be used to submit GET/POST data, and named/passed arguments.
Boolean true or false on success/failure, or contents of rendered action if 'return' is set in $extra.
toString( )
Object-to-string conversion. Each class can override this method as necessary.
protected array
Base driver configuration settings. Merged with user settings.
array( 'persistent' => true, 'host' => 'localhost', 'login' => 'root', 'password' => '', 'database' => 'cake', 'schema' => 'public', 'port' => 5432, 'encoding' => '', 'sslmode' => 'allow', 'flags' => array() )
protected array
Contains mappings of custom auto-increment sequences, if a table uses a sequence name other than what is dictated by convention.
array()
protected array
The set of valid SQL operations usable in a WHERE statement
array('like', 'ilike', 'or', 'not', 'in', 'between', '~', '~\*', '\!~', '\!~\*', 'similar to')
public array
Columns
array( 'primary_key' => array('name' => 'serial NOT NULL'), 'string' => array('name' => 'varchar', 'limit' => '255'), 'text' => array('name' => 'text'), 'integer' => array('name' => 'integer', 'formatter' => 'intval'), 'biginteger' => array('name' => 'bigint', 'limit' => '20'), 'float' => array('name' => 'float', 'formatter' => 'floatval'), 'decimal' => array('name' => 'decimal', 'formatter' => 'floatval'), 'datetime' => array('name' => 'timestamp', 'format' => 'Y-m-d H:i:s', 'formatter' => 'date'), 'timestamp' => array('name' => 'timestamp', 'format' => 'Y-m-d H:i:s', 'formatter' => 'date'), 'time' => array('name' => 'time', 'format' => 'H:i:s', 'formatter' => 'date'), 'date' => array('name' => 'date', 'format' => 'Y-m-d', 'formatter' => 'date'), 'binary' => array('name' => 'bytea'), 'boolean' => array('name' => 'boolean'), 'number' => array('name' => 'numeric'), 'inet' => array('name' => 'inet'), 'uuid' => array('name' => 'uuid') )
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http://api.cakephp.org/2.8/class-Postgres.html