From 539a498bb804ebe6293f1fd4fce708615096edb2 Mon Sep 17 00:00:00 2001
From: Gaofei Zhao <15748980+dippindots@users.noreply.github.com>
Date: Tue, 31 Oct 2023 10:15:15 -0400
Subject: [PATCH] Limit index to a certain length to avoid key exceeding length

---
 db-scripts/src/main/resources/cgds.sql      | 2 +-
 db-scripts/src/main/resources/migration.sql | 4 +++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/db-scripts/src/main/resources/cgds.sql b/db-scripts/src/main/resources/cgds.sql
index 44d88960b4d..3189f121377 100644
--- a/db-scripts/src/main/resources/cgds.sql
+++ b/db-scripts/src/main/resources/cgds.sql
@@ -669,7 +669,7 @@ CREATE TABLE `clinical_event_data` (
   `VALUE` varchar(5000) NOT NULL,
   FOREIGN KEY (`CLINICAL_EVENT_ID`) REFERENCES `clinical_event` (`CLINICAL_EVENT_ID`) ON DELETE CASCADE,
   INDEX `idx_clinical_event_key` (`KEY`),
-  INDEX `idx_clinical_event_value` (`VALUE`)
+  INDEX `idx_clinical_event_value` (`VALUE`(768)) -- max key length is 3072 bytes, for MySQL 8 default character set utf8mb4, max characters length are 768
 );
 
 -- --------------------------------------------------------
diff --git a/db-scripts/src/main/resources/migration.sql b/db-scripts/src/main/resources/migration.sql
index 3983cb589cf..9e7e07d2f20 100644
--- a/db-scripts/src/main/resources/migration.sql
+++ b/db-scripts/src/main/resources/migration.sql
@@ -1030,5 +1030,7 @@ CREATE INDEX idx_sample_stable_id ON sample (`STABLE_ID`);
 UPDATE `info` SET `DB_SCHEMA_VERSION`="2.13.1";
 
 ##version: 2.13.2
+ALTER TABLE clinical_event_data DROP INDEX idx_clinical_event_value;
 CREATE INDEX idx_patient_stable_id ON patient (`STABLE_ID`);
-UPDATE `info` SET `DB_SCHEMA_VERSION`="2.13.2";
\ No newline at end of file
+CREATE INDEX idx_clinical_event_value ON clinical_event_data (`VALUE`(768)) -- max key length is 3072 bytes, for MySQL 8 default character set utf8mb4, max characters length are 768
+UPDATE `info` SET `DB_SCHEMA_VERSION`="2.13.2";