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Questions: Create Unique Index Without MariaDB-Only Syntax #12334

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Questions: Create Unique Index Without MariaDB-Only Syntax #12334

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12 changes: 8 additions & 4 deletions components/ILIAS/Questions/src/Setup/OverarchingQuestionTables.php
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Original file line number Diff line number Diff line change
Expand Up @@ -363,10 +363,14 @@ public function step_7(): void
);
}

$this->db->manipulate(
"CREATE UNIQUE INDEX IF NOT EXISTS apc_idx ON {$table_name}" . PHP_EOL
. '(`answer_form_id`, `parent_id`, `condition`)'
);
$unique_fields = ['answer_form_id', 'parent_id', 'condition'];
$unique_constraint_exists = array_filter(
(new \ilDBAnalyzer($this->db))->getConstraintsInformation($table_name),
static fn(array $constraint): bool => array_keys($constraint['fields']) === $unique_fields
) !== [];
if (!$unique_constraint_exists) {
$this->db->addUniqueConstraint($table_name, $unique_fields, 'apc');
}
}

public function step_8(): void
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