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[ticket/10942] Add a comment why we cast to sql_case()

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PHPBB3-10942
This commit is contained in:
Joas Schilling 2012-06-20 23:30:31 +02:00
parent 089e5f5c79
commit c71f604327
5 changed files with 5 additions and 0 deletions
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1
phpBB/includes/db/mssql.php
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@ -96,6 +96,7 @@ class dbal_mssql extends dbal
*/
function sql_case($condition, $action_true, $action_false = false)
{
// To ensure, that both expressions have the same type, we cast them to varchar manually
$sql_case = 'CASE WHEN ' . $condition;
$sql_case .= ' THEN CAST(' . $action_true . ' AS VARCHAR)';
$sql_case .= ($action_false !== false) ? ' ELSE CAST(' . $action_false . ' AS VARCHAR)' : '';

1
phpBB/includes/db/mssql_odbc.php
View file

@ -114,6 +114,7 @@ class dbal_mssql_odbc extends dbal
*/
function sql_case($condition, $action_true, $action_false = false)
{
// To ensure, that both expressions have the same type, we cast them to varchar manually
$sql_case = 'CASE WHEN ' . $condition;
$sql_case .= ' THEN CAST(' . $action_true . ' AS VARCHAR)';
$sql_case .= ($action_false !== false) ? ' ELSE CAST(' . $action_false . ' AS VARCHAR)' : '';

1
phpBB/includes/db/mssqlnative.php
View file

@ -262,6 +262,7 @@ class dbal_mssqlnative extends dbal
*/
function sql_case($condition, $action_true, $action_false = false)
{
// To ensure, that both expressions have the same type, we cast them to varchar manually
$sql_case = 'CASE WHEN ' . $condition;
$sql_case .= ' THEN CAST(' . $action_true . ' AS VARCHAR)';
$sql_case .= ($action_false !== false) ? ' ELSE CAST(' . $action_false . ' AS VARCHAR)' : '';

1
phpBB/includes/db/oracle.php
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@ -94,6 +94,7 @@ class dbal_oracle extends dbal
*/
function sql_case($condition, $action_true, $action_false = false)
{
// To ensure, that both expressions have the same type, we cast them to clob manually
$sql_case = 'CASE WHEN ' . $condition;
$sql_case .= ' THEN CAST(' . $action_true . ' AS clob)';
$sql_case .= ($action_false !== false) ? ' ELSE CAST(' . $action_false . ' AS clob)' : '';

1
phpBB/includes/db/postgres.php
View file

@ -159,6 +159,7 @@ class dbal_postgres extends dbal
*/
function sql_case($condition, $action_true, $action_false = false)
{
// To ensure, that both expressions have the same type, we cast them to text manually
$sql_case = 'CASE WHEN ' . $condition;
$sql_case .= ' THEN CAST(' . $action_true . ' AS TEXT)';
$sql_case .= ($action_false !== false) ? ' ELSE CAST(' . $action_false . ' AS TEXT)' : '';