ALTER VIEW .. AS

alterView("v").as(select(one().as("a")))

-- AURORA_POSTGRES, POSTGRES, YUGABYTEDB
DO $$
BEGIN
  DROP VIEW v;
  CREATE VIEW v
  AS
  SELECT 1 a;
END;
$$

-- DB2
BEGIN
  EXECUTE IMMEDIATE 'DROP VIEW v';
  EXECUTE IMMEDIATE 'CREATE VIEW v
  AS
  SELECT 1 a
  FROM SYSIBM.DUAL';
END

-- FIREBIRD
EXECUTE BLOCK AS
BEGIN
  EXECUTE STATEMENT 'DROP VIEW v';
  EXECUTE STATEMENT 'CREATE VIEW v
  AS
  SELECT 1 a
  FROM RDB$DATABASE';
END

-- H2
CREATE ALIAS block_1695310503590_7109533 AS $$
  void x(Connection c) throws SQLException {
    try (PreparedStatement s = c.prepareStatement(
      "DROP VIEW v"
    )) {
      s.execute();
    }
    try (PreparedStatement s = c.prepareStatement(
      "CREATE VIEW v\n" +
      "AS\n" +
      "SELECT 1 a"
    )) {
      s.execute();
    }
  }
$$;
CALL block_1695310503590_7109533();
DROP ALIAS block_1695310503590_7109533;

-- HANA
DO BEGIN
  EXECUTE IMMEDIATE 'DROP VIEW v';
  EXECUTE IMMEDIATE 'CREATE VIEW v
  AS
  SELECT 1 a
  FROM SYS.DUMMY';
END;

-- MARIADB
BEGIN NOT ATOMIC
  DROP VIEW v;
  CREATE VIEW v
  AS
  SELECT 1 a;
END;

-- MYSQL

CREATE PROCEDURE block_1695310512057_3588642()
MODIFIES SQL DATA
BEGIN
  DROP VIEW v;
  CREATE VIEW v
  AS
  SELECT 1 a;
END;
CALL block_1695310512057_3588642();
DROP PROCEDURE block_1695310512057_3588642;

-- ORACLE
BEGIN
  EXECUTE IMMEDIATE 'DROP VIEW v';
  EXECUTE IMMEDIATE 'CREATE VIEW v
  AS
  SELECT 1 a';
END;

-- SQLDATAWAREHOUSE, VERTICA
BEGIN
  DROP VIEW v;
  CREATE VIEW v
  AS
  SELECT 1 a;
END;

-- SQLSERVER
ALTER VIEW v
AS
SELECT 1 a

-- ACCESS, ASE, AURORA_MYSQL, BIGQUERY, COCKROACHDB, DERBY, DUCKDB, EXASOL, HSQLDB, INFORMIX, MEMSQL, REDSHIFT, SNOWFLAKE, 
-- SQLITE, SYBASE, TERADATA, TRINO
/* UNSUPPORTED */