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Make sure Oracle always casts everything in the best way 

Signed-off-by: Joas Schilling <coding@schilljs.com>
This commit is contained in:
Joas Schilling 2020-11-06 08:52:09 +01:00 committed by backportbot[bot]
parent c71cc6824e
commit 2e3cffc53b
1 changed files with 43 additions and 0 deletions
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43
lib/private/DB/QueryBuilder/FunctionBuilder/OCIFunctionBuilder.php
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@ -24,9 +24,52 @@
namespace OC\DB\QueryBuilder\FunctionBuilder;
use OC\DB\QueryBuilder\QueryFunction;
use OCP\DB\QueryBuilder\ILiteral;
use OCP\DB\QueryBuilder\IParameter;
use OCP\DB\QueryBuilder\IQueryFunction;
class OCIFunctionBuilder extends FunctionBuilder {
public function md5($input) {
return new QueryFunction('LOWER(DBMS_OBFUSCATION_TOOLKIT.md5 (input => UTL_RAW.cast_to_raw(' . $this->helper->quoteColumnName($input) .')))');
}
/**
* As per https://docs.oracle.com/cd/B19306_01/server.102/b14200/functions060.htm
* Oracle uses the first value to cast the rest or the values. So when the
* first value is a literal, plain value or column, instead of doing the
* math, it will cast the expression to int and continue with a "0". So when
* the second parameter is a function or column, we have to put that as
* first parameter.
*
* @param string|ILiteral|IParameter|IQueryFunction $x
* @param string|ILiteral|IParameter|IQueryFunction $y
* @return QueryFunction
*/
public function greatest($x, $y) {
if (is_string($y) || $y instanceof IQueryFunction) {
return parent::greatest($y, $x);
}
return parent::greatest($x, $y);
}
/**
* As per https://docs.oracle.com/cd/B19306_01/server.102/b14200/functions060.htm
* Oracle uses the first value to cast the rest or the values. So when the
* first value is a literal, plain value or column, instead of doing the
* math, it will cast the expression to int and continue with a "0". So when
* the second parameter is a function or column, we have to put that as
* first parameter.
*
* @param string|ILiteral|IParameter|IQueryFunction $x
* @param string|ILiteral|IParameter|IQueryFunction $y
* @return QueryFunction
*/
public function least($x, $y) {
if (is_string($y) || $y instanceof IQueryFunction) {
return parent::least($y, $x);
}
return parent::least($x, $y);
}
}