Oracle specific implementation of ezcQuery.
This class reimplements methods where Oracle differs from the standard implementation in ezcQuery.Most notably LIMIT which is not supported directly in oracle.
Source for this file: /Database/src/sqlabstraction/implementations/query_select_oracle.php
ezcQuery | --ezcQuerySelect | --ezcQuerySelectOracle
Version: | //autogentag// |
From ezcQuerySelect: | |
---|---|
ezcQuerySelect::ASC
|
Sort the result ascending. |
ezcQuerySelect::DESC
|
Sort the result descending. |
From ezcQuerySelect | |
---|---|
protected |
ezcQuerySelect::$fromString
|
protected |
ezcQuerySelect::$groupString
|
protected |
ezcQuerySelect::$havingString
|
protected |
ezcQuerySelect::$lastInvokedMethod
|
protected |
ezcQuerySelect::$limitString
|
protected |
ezcQuerySelect::$orderString
|
protected |
ezcQuerySelect::$selectString
|
protected |
ezcQuerySelect::$whereString
|
From ezcQuery | |
protected |
ezcQuery::$db
|
public |
ezcQuery::$expr
|
public static string |
getDummyTableName(
)
Returns dummy table name 'dual'. |
public ezcQuerySelectOracle |
__construct(
$db
)
Constructs a new ezcQueryOracle object working on the database $db. |
public string |
alias(
$name
, $alias
)
Returns SQL to create an alias. |
public void |
getQuery(
)
Transforms the query from the parent to provide LIMIT functionality. |
public ezcQuerySelect |
limit(
$limit
, [ $offset
= 0] )
Returns SQL that limits the result set. |
public PDOStatement |
prepare(
)
Handles preparing query. |
public void |
reset(
)
Resets the query object for reuse. |
From ezcQuerySelect | |
---|---|
public ezcQuerySelect |
ezcQuerySelect::__construct()
Constructs a new ezcQuery object. |
public string |
ezcQuerySelect::alias()
Returns SQL to create an alias |
protected ezcQuery |
ezcQuerySelect::doJoin()
Returns the SQL for a join or prepares $fromString for a join. |
public ezcQuery |
ezcQuerySelect::from()
Select which tables you want to select from. |
public static bool|string |
ezcQuerySelect::getDummyTableName()
Returns dummy table name. |
public string |
ezcQuerySelect::getQuery()
Returns the complete select query string. |
public ezcQuery |
ezcQuerySelect::groupBy()
Returns SQL that groups the result set by a given column. |
public ezcQuery |
ezcQuerySelect::having()
Returns SQL that set having by a given expression. |
public ezcQuery |
ezcQuerySelect::innerJoin()
Returns the SQL for an inner join or prepares $fromString for an inner join. |
public ezcQuery |
ezcQuerySelect::leftJoin()
Returns the SQL for a left join or prepares $fromString for a left join. |
public ezcQuerySelect |
ezcQuerySelect::limit()
Returns SQL that limits the result set. |
public ezcQuery |
ezcQuerySelect::orderBy()
Returns SQL that orders the result set by a given column. |
public void |
ezcQuerySelect::reset()
Resets the query object for reuse. |
public ezcQuery |
ezcQuerySelect::rightJoin()
Returns the SQL for a right join or prepares $fromString for a right join. |
public ezcQuery |
ezcQuerySelect::select()
Opens the query and selects which columns you want to return with the query. |
public ezcQuery |
ezcQuerySelect::selectDistinct()
Opens the query and uses a distinct select on the columns you want to return with the query. |
public ezcQuerySelect |
ezcQuerySelect::where()
Adds a where clause with logical expressions to the query. |
From ezcQuery | |
public ezcQuery |
ezcQuery::__construct()
Constructs a new ezcQuery that works on the database $db and with the aliases $aliases. |
public static array |
ezcQuery::arrayFlatten()
Returns all the elements in $array as one large single dimensional array. |
public string |
ezcQuery::bindParam()
Binds the parameter $param to the specified variable name $placeHolder.. |
public string |
ezcQuery::bindValue()
Binds the value $value to the specified variable name $placeHolder. |
public void |
ezcQuery::doBind()
Performs binding of variables bound with bindValue and bindParam on the statement $stmt. |
protected string |
ezcQuery::getIdentifier()
Returns the correct identifier for the alias $alias. |
protected array(string) |
ezcQuery::getIdentifiers()
Returns the correct identifiers for the aliases found in $aliases. |
public abstract string |
ezcQuery::getQuery()
Returns the query string for this query object. |
public bool |
ezcQuery::hasAliases()
Returns true if this object has aliases. |
public PDOStatement |
ezcQuery::prepare()
Returns a prepared statement from this query which can be used for execution. |
protected void |
ezcQuery::resetBinds()
Resets the bound values and parameters to empty. |
public void |
ezcQuery::setAliases()
Sets the aliases $aliases for this object. |
public ezcQuerySubSelect |
ezcQuery::subSelect()
Returns the ezcQuerySubSelect query object. |
public string |
ezcQuery::__toString()
Return SQL string for query. |
Returns dummy table name 'dual'.
Method | Description |
---|---|
ezcQuerySelect::getDummyTableName() |
Returns dummy table name. |
Constructs a new ezcQueryOracle object working on the database $db.
Name | Type | Description |
---|---|---|
$db |
PDO |
Method | Description |
---|---|
ezcQuerySelect::__construct() |
Constructs a new ezcQuery object. |
Returns SQL to create an alias.
This method can be used to create an alias for either a table or a column. Example:
Name | Type | Description |
---|---|---|
$name |
string | Old name |
$alias |
string | Alias |
Method | Description |
---|---|
ezcQuerySelect::alias() |
Returns SQL to create an alias |
Transforms the query from the parent to provide LIMIT functionality.
Method | Description |
---|---|
ezcQuerySelect::getQuery() |
Returns the complete select query string. |
Returns SQL that limits the result set.
$limit controls the maximum number of rows that will be returned. $offset controls which row that will be the first in the result set from the total amount of matching rows.
Example:
Oracle does not support the LIMIT keyword. A complete rewrite of the query is neccessary. Queries will be rewritten like this:
Note that you will not get a result if you call buildLimit() when using the oracle database.
Name | Type | Description |
---|---|---|
$limit |
string | integer expression |
$offset |
string | integer expression |
Method | Description |
---|---|
ezcQuerySelect::limit() |
Returns SQL that limits the result set. |
Handles preparing query.
Overrides ezcQuery->prepare()
Adds "FROM dual" to the select if no FROM clause specified i.e. fixes queries like "SELECT 1+1" to work in Oracle.
Method | Description |
---|---|
ezcQuery::prepare() |
Returns a prepared statement from this query which can be used for execution. |
Resets the query object for reuse.
Method | Description |
---|---|
ezcQuerySelect::reset() |
Resets the query object for reuse. |