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Database: ezcQueryExpressionSqlite

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Class: ezcQueryExpressionSqlite

The ezcQueryExpressionSqlite class is used to create SQL expression for SQLite. [source]

This class reimplements the methods that have a different syntax in SQLite (substr) and contains PHP implementations of functions that are registered with SQLite with it's PDO::sqliteRegisterFunction() method.

Parents

ezcQueryExpression
   |
   --ezcQueryExpressionSqlite

Member Variables

protected array(string=>string)

$intervalMap
         = array(
        'SECOND' => 'seconds',
        'MINUTE' => 'minutes',
        'HOUR' => 'hours',
        'DAY' => 'days',
        'MONTH' => 'months',
        'YEAR' => 'years',
    )

Contains an interval map from generic intervals to SQLite native intervals.

Inherited Member Variables

From ezcQueryExpression:

protected	`ezcQueryExpression::$db`
protected	`ezcQueryExpression::$quoteValues`

Method Summary

public string	`bitXor( $value1, $value2 )` Returns the SQL that performs the bitwise XOR on two values.
public string	`dateAdd( $column, $expr, $type )` Returns the SQL that adds an interval to a timestamp value.
public string	`dateExtract( $column, $type )` Returns the SQL that extracts parts from a timestamp value.
public string	`dateSub( $column, $expr, $type )` Returns the SQL that subtracts an interval from a timestamp value.
public string	`in( $column, $... )` Returns the SQL to check if a value is one in a set of given values..
public string	`now( )` Returns the current system date and time.
public string	`subString( $value, $from, [$len = null] )` Returns part of a string.
public string	`unixTimestamp( $column )` Returns the SQL that converts a timestamp value to a unix timestamp.

Inherited Methods

From ezcQueryExpression :

public ezcQueryExpression	`ezcQueryExpression::__construct()` Constructs an empty ezcQueryExpression
public string	`ezcQueryExpression::add()` Returns the SQL to add values or expressions together.
public string	`ezcQueryExpression::avg()` Returns the average value of a column
public string	`ezcQueryExpression::between()` Returns SQL that checks if an expression evaluates to a value between two values.
public string	`ezcQueryExpression::bitAnd()` Returns the SQL that performs the bitwise AND on two values.
public string	`ezcQueryExpression::bitOr()` Returns the SQL that performs the bitwise OR on two values.
public string	`ezcQueryExpression::bitXor()` Returns the SQL that performs the bitwise XOR on two values.
public string	`ezcQueryExpression::ceil()` Returns the SQL to calculate the next highest integer value from the number.
public void	`ezcQueryExpression::concat()` Returns a series of strings concatinated
public string	`ezcQueryExpression::count()` Returns the number of rows (without a NULL value) of a column
public string	`ezcQueryExpression::dateAdd()` Returns the SQL that adds an interval to a timestamp value.
public string	`ezcQueryExpression::dateExtract()` Returns the SQL that extracts parts from a timestamp value.
public string	`ezcQueryExpression::dateSub()` Returns the SQL that subtracts an interval from a timestamp value.
public string	`ezcQueryExpression::div()` Returns the SQL to divide values or expressions by eachother.
public string	`ezcQueryExpression::eq()` Returns the SQL to check if two values are equal.
public string	`ezcQueryExpression::floor()` Returns the SQL to calculate the next lowest integer value from the number.
protected string	`ezcQueryExpression::getIdentifier()` Returns the correct identifier for the alias $alias.
protected array(string)	`ezcQueryExpression::getIdentifiers()` Returns the correct identifiers for the aliases found in $aliases.
public string	`ezcQueryExpression::gt()` Returns the SQL to check if one value is greater than another value.
public string	`ezcQueryExpression::gte()` Returns the SQL to check if one value is greater than or equal to another value.
public bool	`ezcQueryExpression::hasAliases()` Returns true if this object has aliases.
public string	`ezcQueryExpression::in()` Returns the SQL to check if a value is one in a set of given values..
public string	`ezcQueryExpression::isNull()` Returns SQL that checks if a expression is null.
public string	`ezcQueryExpression::lAnd()` Returns the SQL to bind logical expressions together using a logical and.
public string	`ezcQueryExpression::length()` Returns the length of text field $column
public void	`ezcQueryExpression::like()` Match a partial string in a column.
public string	`ezcQueryExpression::lOr()` Returns the SQL to bind logical expressions together using a logical or.
public string	`ezcQueryExpression::lower()` Returns the SQL to change all characters to lowercase
public string	`ezcQueryExpression::lt()` Returns the SQL to check if one value is less than another value.
public string	`ezcQueryExpression::lte()` Returns the SQL to check if one value is less than or equal to another value.
public string	`ezcQueryExpression::max()` Returns the highest value of a column
public string	`ezcQueryExpression::md5()` Returns the md5 sum of $column.
public string	`ezcQueryExpression::min()` Returns the lowest value of a column
public string	`ezcQueryExpression::mod()` Returns the remainder of the division operation $expression1 / $expression2.
public string	`ezcQueryExpression::mul()` Returns the SQL to multiply values or expressions by eachother.
public string	`ezcQueryExpression::neq()` Returns the SQL to check if two values are unequal.
public string	`ezcQueryExpression::not()` Returns the SQL for a logical not, negating the $expression.
public string	`ezcQueryExpression::now()` Returns the current system date and time.
public string	`ezcQueryExpression::position()` Returns the SQL to locate the position of the first occurrence of a substring
public string	`ezcQueryExpression::round()` Rounds a numeric field to the number of decimals specified.
public string	`ezcQueryExpression::searchedCase()` Returns a searched CASE statement.
public void	`ezcQueryExpression::setAliases()` Sets the aliases $aliases for this object.
public void	`ezcQueryExpression::setValuesQuoting()` Sets the mode of quoting for parameters passed to SQL functions and operators.
public string	`ezcQueryExpression::sub()` Returns the SQL to subtract values or expressions from eachother.
public string	`ezcQueryExpression::subString()` Returns part of a string.
public string	`ezcQueryExpression::sum()` Returns the total sum of a column
public string	`ezcQueryExpression::unixTimestamp()` Returns the SQL that converts a timestamp value to a unix timestamp.
public string	`ezcQueryExpression::upper()` Returns the SQL to change all characters to uppercase

Methods

bitXor

string bitXor( string $value1, string $value2 )

Returns the SQL that performs the bitwise XOR on two values.

Parameters

Name	Type	Description
`$value1`	string
`$value2`	string

Redefinition of

Method	Description
`ezcQueryExpression::bitXor()`	Returns the SQL that performs the bitwise XOR on two values.

dateAdd

string dateAdd( string $column, numeric $expr, string $type )

Returns the SQL that adds an interval to a timestamp value.

Parameters

Name	Type	Description
`$column`	string
`$expr`	numeric
`$type`	string	one of SECOND, MINUTE, HOUR, DAY, MONTH, or YEAR

Redefinition of

Method	Description
`ezcQueryExpression::dateAdd()`	Returns the SQL that adds an interval to a timestamp value.

dateExtract

string dateExtract( string $column, string $type )

Returns the SQL that extracts parts from a timestamp value.

Parameters

Name	Type	Description
`$column`	string
`$type`	string	one of SECOND, MINUTE, HOUR, DAY, MONTH, or YEAR

Redefinition of

Method	Description
`ezcQueryExpression::dateExtract()`	Returns the SQL that extracts parts from a timestamp value.

dateSub

string dateSub( string $column, numeric $expr, string $type )

Returns the SQL that subtracts an interval from a timestamp value.

Parameters

Name	Type	Description
`$column`	string
`$expr`	numeric
`$type`	string	one of SECOND, MINUTE, HOUR, DAY, MONTH, or YEAR

Redefinition of

Method	Description
`ezcQueryExpression::dateSub()`	Returns the SQL that subtracts an interval from a timestamp value.

in

string in( string $column, string|array(string) $... )

Returns the SQL to check if a value is one in a set of given values..

in() accepts an arbitrary number of parameters. The first parameter must always specify the value that should be matched against. Successive parameters must contain a logical expression or an array with logical expressions. These expressions will be matched against the first parameter.

Example:

1.  $q->select( '*' )->from( 'table' )
2.                   ->where( $q->expr->in( 'id', 1, 2, 3 ) );

Optimization note: Call setQuotingValues( false ) before using in() with big lists of numeric parameters. This avoid redundant quoting of numbers in resulting SQL query and saves time of converting strings to numbers inside RDBMS.

Parameters

Name	Type	Description
`$column`	string	the value that should be matched against
`$...`	string\|array(string)	values that will be matched against $column

Throws

Class	Description
`ezcQueryVariableParameterException`	if called with less than two parameters.
`ezcQueryInvalidParameterException`	if the 2nd parameter is an empty array.

Redefinition of

Method	Description
`ezcQueryExpression::in()`	Returns the SQL to check if a value is one in a set of given values..

now

string now( )

Returns the current system date and time.

Redefinition of

Method	Description
`ezcQueryExpression::now()`	Returns the current system date and time.

subString

string subString( string $value, int $from, [int $len = null] )

Returns part of a string.

Note: Not SQL92, but common functionality. SQLite only supports the 3 parameter variant of this function, so we are using 2^30-1 as artificial length in that case.

Parameters

Name	Type	Description
`$value`	string	the target $value the string or the string column.
`$from`	int	extract from this characeter.
`$len`	int	extract this amount of characters.

Redefinition of

Method	Description
`ezcQueryExpression::subString()`	Returns part of a string.

unixTimestamp

string unixTimestamp( string $column )

Returns the SQL that converts a timestamp value to a unix timestamp.

Parameters

Name	Type	Description
`$column`	string

Redefinition of

Method	Description
`ezcQueryExpression::unixTimestamp()`	Returns the SQL that converts a timestamp value to a unix timestamp.

Last updated: Mon, 10 Nov 2008

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Getting Started

Components

Database: ezcQueryExpressionSqlite

Class: ezcQueryExpressionSqlite

Parents

Member Variables

Inherited Member Variables

Method Summary

Inherited Methods

Methods

bitXor

Parameters

Redefinition of

dateAdd

Parameters

Redefinition of

dateExtract

Parameters

Redefinition of

dateSub

Parameters

Redefinition of

in

Parameters

Throws

Redefinition of

now

Redefinition of

subString

Parameters

Redefinition of

unixTimestamp

Parameters

Redefinition of