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Migration with procedures (#1451)
DB Migration with helper stored procedures (for MySql and SQL Server)
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Roland Praml authored and Rob Bygrave committed
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<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
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<extra-ddl xmlns="http://ebean-orm.github.io/xml/ns/extraddl">
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<ddl-script name="create procs" platforms="sqlserver" init="true">-- Initial script to create stored procedures etc for sqlserver platform
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-- create table-value-parameters
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if not exists (select name from sys.types where name = 'ebean_bigint_tvp') create type ebean_bigint_tvp as table (c1 bigint);
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if not exists (select name from sys.types where name = 'ebean_float_tvp') create type ebean_float_tvp as table (c1 float);
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if not exists (select name from sys.types where name = 'ebean_bit_tvp') create type ebean_bit_tvp as table (c1 bit);
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if not exists (select name from sys.types where name = 'ebean_date_tvp') create type ebean_date_tvp as table (c1 date);
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if not exists (select name from sys.types where name = 'ebean_time_tvp') create type ebean_time_tvp as table (c1 time);
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if not exists (select name from sys.types where name = 'ebean_uniqueidentifier_tvp') create type ebean_uniqueidentifier_tvp as table (c1 uniqueidentifier);
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if not exists (select name from sys.types where name = 'ebean_nvarchar_tvp') create type ebean_nvarchar_tvp as table (c1 nvarchar(max));
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delimiter $$
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-----------------------------------------------------------
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-- PROCEDURE: usp_ebean_drop_indices TABLE, COLUMN
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-- deletes all indices referring to TABLE.COLUMN
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-----------------------------------------------------------
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CREATE OR ALTER PROCEDURE usp_ebean_drop_indices @tableName nvarchar(255), @columnName nvarchar(255)
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AS SET NOCOUNT ON
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declare @sql nvarchar(1000)
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declare @indexName nvarchar(255)
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BEGIN
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DECLARE index_cursor CURSOR FOR SELECT i.name from sys.indexes i
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join sys.index_columns ic on ic.object_id = i.object_id and ic.index_id = i.index_id
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join sys.columns c on c.object_id = ic.object_id and c.column_id = ic.column_id
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where i.object_id = OBJECT_ID(@tableName) AND c.name = @columnName;
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OPEN index_cursor
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FETCH NEXT FROM index_cursor INTO @indexName
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WHILE @@FETCH_STATUS = 0
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BEGIN
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set @sql = 'drop index ' + @indexName + ' on ' + @tableName;
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EXECUTE(@sql);
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FETCH NEXT FROM index_cursor INTO @indexName
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END;
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CLOSE index_cursor;
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DEALLOCATE index_cursor;
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END
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$$
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delimiter $$
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--------------------------------------------------------------------
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-- PROCEDURE: usp_ebean_drop_default_constraint TABLE, COLUMN
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-- deletes the default constraint, which has a random name
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--------------------------------------------------------------------
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CREATE OR ALTER PROCEDURE usp_ebean_drop_default_constraint @tableName nvarchar(255), @columnName nvarchar(255)
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AS SET NOCOUNT ON
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declare @tmp nvarchar(1000)
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BEGIN
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select @Tmp = t1.name from sys.default_constraints t1
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join sys.columns t2 on t1.object_id = t2.default_object_id
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where t1.parent_object_id = OBJECT_ID(@tableName) and t2.name = @columnName;
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if @Tmp is not null EXEC('alter table ' + @tableName +' drop constraint ' + @tmp);
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END
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$$
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delimiter $$
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--------------------------------------------------------------------
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-- PROCEDURE: usp_ebean_drop_constraints TABLE, COLUMN
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-- deletes constraints and foreign keys refering to TABLE.COLUMN
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--------------------------------------------------------------------
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CREATE OR ALTER PROCEDURE usp_ebean_drop_constraints @tableName nvarchar(255), @columnName nvarchar(255)
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AS SET NOCOUNT ON
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declare @sql nvarchar(1000)
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declare @constraintName nvarchar(255)
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BEGIN
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DECLARE name_cursor CURSOR FOR
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SELECT cc.name from sys.check_constraints cc
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join sys.columns c on c.object_id = cc.parent_object_id and c.column_id = cc.parent_column_id
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where parent_object_id = OBJECT_ID(@tableName) AND c.name = @columnName
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UNION SELECT fk.name from sys.foreign_keys fk
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join sys.foreign_key_columns fkc on fkc.constraint_object_id = fk.object_id
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and fkc.parent_object_id = fk.parent_object_id
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join sys.columns c on c.object_id = fkc.parent_object_id and c.column_id = fkc.parent_column_id
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where fkc.parent_object_id = OBJECT_ID(@tableName) AND c.name = @columnName;
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OPEN name_cursor
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FETCH NEXT FROM name_cursor INTO @constraintName
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WHILE @@FETCH_STATUS = 0
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BEGIN
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set @sql = 'alter table ' + @tableName + ' drop constraint ' + @constraintName;
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EXECUTE(@sql);
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FETCH NEXT FROM name_cursor INTO @constraintName
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END;
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CLOSE name_cursor;
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DEALLOCATE name_cursor;
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END
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$$
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delimiter $$
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-------------------------------------------------------------------------------------
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-- PROCEDURE: usp_ebean_drop_column TABLE, COLUMN
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-- deletes the column annd ensures that all indices and constraints are dropped first
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-------------------------------------------------------------------------------------
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CREATE OR ALTER PROCEDURE usp_ebean_drop_column @tableName nvarchar(255), @columnName nvarchar(255)
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AS SET NOCOUNT ON
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declare @sql nvarchar(1000)
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BEGIN
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EXEC usp_ebean_drop_indices @tableName, @columnName;
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EXEC usp_ebean_drop_default_constraint @tableName, @columnName;
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EXEC usp_ebean_drop_constraints @tableName, @columnName;
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set @sql = 'alter table ' + @tableName + ' drop column ' + @columnName;
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EXECUTE(@sql);
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END
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$$
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</ddl-script>
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<ddl-script name="create procs" platforms="mysql" init="true">-- Inital script to create stored procedures etc for mysql platform
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DROP PROCEDURE IF EXISTS usp_ebean_drop_foreign_keys;
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delimiter $$
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------------------------------------------------------------------------------
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-- PROCEDURE: usp_ebean_drop_foreign_keys TABLE, COLUMN
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-- deletes all constraints and foreign keys referring to TABLE.COLUMN
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------------------------------------------------------------------------------
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CREATE PROCEDURE usp_ebean_drop_foreign_keys(IN p_table_name VARCHAR(255), IN p_column_name VARCHAR(255))
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BEGIN
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DECLARE done INT DEFAULT FALSE;
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DECLARE c_fk_name CHAR(255);
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DECLARE curs CURSOR FOR SELECT CONSTRAINT_NAME from information_schema.KEY_COLUMN_USAGE
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WHERE TABLE_SCHEMA = DATABASE() and TABLE_NAME = p_table_name and COLUMN_NAME = p_column_name
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AND REFERENCED_TABLE_NAME IS NOT NULL;
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DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
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OPEN curs;
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read_loop: LOOP
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FETCH curs INTO c_fk_name;
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IF done THEN
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LEAVE read_loop;
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END IF;
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SET @sql = CONCAT('ALTER TABLE ', p_table_name, ' DROP FOREIGN KEY ', c_fk_name);
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PREPARE stmt FROM @sql;
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EXECUTE stmt;
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END LOOP;
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CLOSE curs;
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END
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$$
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DROP PROCEDURE IF EXISTS usp_ebean_drop_column;
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delimiter $$
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-------------------------------------------------------------------------------------
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-- PROCEDURE: usp_ebean_drop_column TABLE, COLUMN
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-- deletes the column and ensures that all indices and constraints are dropped first
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-------------------------------------------------------------------------------------
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CREATE PROCEDURE usp_ebean_drop_column(IN p_table_name VARCHAR(255), IN p_column_name VARCHAR(255))
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BEGIN
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CALL usp_ebean_drop_foreign_keys(p_table_name, p_column_name);
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SET @sql = CONCAT('ALTER TABLE ', p_table_name, ' DROP COLUMN ', p_column_name);
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PREPARE stmt FROM @sql;
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EXECUTE stmt;
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END
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$$
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</ddl-script>
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</extra-ddl>
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