Fix: HANA always requires stored procedures (similar to SqlServer), Fix: default value on intermediate alters

ebean-test/src/test/resources/migrationtest/dbmigration/hana/1.3.sql

@@ -32,7 +32,7 @@ declare exit handler for sql_error_code 397 begin end;
 exec 'alter table migtest_e_basic drop constraint ck_migtest_e_basic_status2';
 end;
 $$;
-alter table migtest_e_basic alter ( status2 nclob  default 'N' not null);
+alter table migtest_e_basic alter ( status2 nclob not null);
 alter table migtest_e_basic alter ( status2 nvarchar(1) default 'N' not null);
 alter table migtest_e_basic add constraint ck_migtest_e_basic_status2 check ( status2 in ('N','A','I'));
 delimiter $$

ebean-test/src/test/resources/migrationtest/dbmigration/hana/I__create_procs.sql

@@ -0,0 +1,33 @@
+-- Inital script to create stored procedures etc for the hana platform
+delimiter $$
+--
+-- PROCEDURE: usp_ebean_drop_foreign_keys TABLE, COLUMN
+-- deletes all constraints and foreign keys referring to TABLE.COLUMN
+--
+CREATE OR REPLACE PROCEDURE usp_ebean_drop_foreign_keys(IN table_name NVARCHAR(256), IN column_name NVARCHAR(256))
+AS
+BEGIN
+DECLARE foreign_key_names TABLE(CONSTRAINT_NAME NVARCHAR(256), TABLE_NAME NVARCHAR(256));
+DECLARE i INT;
+
+foreign_key_names = SELECT CONSTRAINT_NAME, TABLE_NAME FROM SYS.REFERENTIAL_CONSTRAINTS WHERE SCHEMA_NAME=CURRENT_SCHEMA AND TABLE_NAME=UPPER(:table_name) AND COLUMN_NAME=UPPER(:column_name);
+
+FOR I IN 1 .. RECORD_COUNT(:foreign_key_names) DO
+EXEC 'ALTER TABLE "' || ESCAPE_DOUBLE_QUOTES(:foreign_key_names.TABLE_NAME[i]) || '" DROP CONSTRAINT "' || ESCAPE_DOUBLE_QUOTES(:foreign_key_names.CONSTRAINT_NAME[i]) || '"';
+END FOR;
+
+END;
+$$
+
+delimiter $$
+--
+-- PROCEDURE: usp_ebean_drop_column TABLE, COLUMN
+-- deletes the column and ensures that all indices and constraints are dropped first
+--
+CREATE OR REPLACE PROCEDURE usp_ebean_drop_column(IN table_name NVARCHAR(256), IN column_name NVARCHAR(256))
+AS
+BEGIN
+CALL usp_ebean_drop_foreign_keys(table_name, column_name);
+EXEC 'ALTER TABLE "' || UPPER(ESCAPE_DOUBLE_QUOTES(table_name)) || '" DROP ("' || UPPER(ESCAPE_DOUBLE_QUOTES(column_name)) || '")';
+END;
+$$

ebean-test/src/test/resources/migrationtest/dbmigration/hana/idx_hana.migrations

@@ -1,7 +1,8 @@
+-745347271,     I__create_procs.sql
 513351138,      1.0__initial.sql
 -1152055114,    1.1.sql
 1830946249,     1.2__dropsFor_1.1.sql
-1073423108,     1.3.sql
+744723875,      1.3.sql
 201970227,      1.4__dropsFor_1.3.sql
 1906063401,     R__order_views_hana.sql