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Added comment about nested query

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Rsl1122 2019-03-26 20:41:04 +02:00
parent 961b8caae8
commit 29e9f0483b
1 changed files with 3 additions and 0 deletions
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Plan/common/src/main/java/com/djrapitops/plan/extension/implementation/storage/transactions/results/RemoveUnsatisfiedConditionalResultsTransaction.java
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@ -91,6 +91,9 @@ public class RemoveUnsatisfiedConditionalResultsTransaction extends Transaction
WHERE + "q1." + ExtensionProviderTable.PROVIDED_CONDITION + " IS NULL" + // Conditions that were not in the satisfied condition query
AND + ExtensionProviderTable.CONDITION + " IS NOT NULL"; // Ignore values that don't need condition
// Nested query here is required because MySQL limits update statements with nested queries:
// The nested query creates a temporary table that bypasses the same table query-update limit.
// Note: MySQL versions 5.6.7+ might optimize this nested query away leading to an exception.
String sql = "DELETE FROM " + playerValueTable +
WHERE + ExtensionPlayerValueTable.ID + " IN (" + SELECT + ExtensionPlayerValueTable.ID + FROM + '(' + selectUnsatisfiedValueIDs + ") as ids)";