create a procedure

Author: Pearl1594

engine/schema/src/main/resources/META-INF/db/procedures/cloud.idempotent_drop_unique_key.sql

@@ -0,0 +1,26 @@
+-- Licensed to the Apache Software Foundation (ASF) under one
+-- or more contributor license agreements.  See the NOTICE file
+-- distributed with this work for additional information
+-- regarding copyright ownership.  The ASF licenses this file
+-- to you under the Apache License, Version 2.0 (the
+-- "License"); you may not use this file except in compliance
+-- with the License.  You may obtain a copy of the License at
+--
+--   http://www.apache.org/licenses/LICENSE-2.0
+--
+-- Unless required by applicable law or agreed to in writing,
+-- software distributed under the License is distributed on an
+-- "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+-- KIND, either express or implied.  See the License for the
+-- specific language governing permissions and limitations
+-- under the License.
+
+-- in cloud
+DROP PROCEDURE IF EXISTS `cloud`.`IDEMPOTENT_DROP_UNIQUE_KEY`;
+
+CREATE PROCEDURE `cloud`.`IDEMPOTENT_DROP_UNIQUE_KEY` (
+    IN in_table_name VARCHAR(200),
+    IN in_index_name VARCHAR(200)
+)
+BEGIN
+    DECLARE CONTINUE HANDLER FOR 1091, 1025 BEGIN END; SET @ddl = CONCAT('ALTER TABLE ', in_table_name, ' DROP KEY ', in_index_name); PREPARE stmt FROM @ddl; EXECUTE stmt; DEALLOCATE PREPARE stmt; END;

engine/schema/src/main/resources/META-INF/db/schema-41910to41920.sql

@@ -22,20 +22,5 @@
 -- Add last_id to the volumes table
 CALL `cloud`.`IDEMPOTENT_ADD_COLUMN`('cloud.volumes', 'last_id', 'bigint(20) unsigned DEFAULT NULL');
 
-SELECT
-    COUNT(*)
-INTO @exists
-FROM information_schema.STATISTICS
-WHERE TABLE_SCHEMA = 'cloud'
-  AND TABLE_NAME = 'counter'
-  AND INDEX_NAME = 'uc_counter__provider__source__value';
-
--- Drop the key if it exists
-SET @sql = IF(@exists > 0, 'ALTER TABLE counter DROP KEY uc_counter__provider__source__value', NULL);
-
--- Execute the drop statement if the index exists
-PREPARE stmt FROM @sql;
-EXECUTE stmt;
-DEALLOCATE PREPARE stmt;
-
+CALL `cloud`.`IDEMPOTENT_DROP_UNIQUE_KEY`('counter', 'uc_counter__provider__source__value');
 CALL `cloud`.`IDEMPOTENT_ADD_UNIQUE_KEY`('cloud.counter', 'uc_counter__provider__source__value__removed', '(provider, source, value, removed)');