snowflake-cloud-data-platform - 大写 SQL 语句在 Snowflake 存储过程中不起作用

Question

在下面的示例中，working_one存储过程有效，而存储过程broken_one无效。两者的唯一区别是 SQL 语句的字母大小写。

create table tmp (
  raw_json variant
);

-- 2019-01-01 = 1546347600000
-- 2018-01-01 = 1514811600000
insert into tmp select parse_json('{ "timestamp":1514811600000}');

create or replace procedure working_one(TIME_VALUE varchar)
returns varchar
language javascript
as
$$
var stmtString = "delete from tmp where to_timestamp(raw_json:timestamp::string) < to_timestamp(:1);"
var stmt = snowflake.createStatement({sqlText: stmtString, binds: [TIME_VALUE]})
var rs = stmt.execute()
rs.next()
return rs.getColumnValue(1)
$$;

create or replace procedure broken_one(TIME_VALUE varchar)
returns varchar
language javascript
as
$$
var stmtString = "DELETE FROM TMP WHERE TO_TIMESTAMP(RAW_JSON:TIMESTAMP::STRING) < TO_TIMESTAMP(:1);"
var stmt = snowflake.createStatement({sqlText: stmtString, binds: [TIME_VALUE]})
var rs = stmt.execute()
rs.next()
return rs.getColumnValue(1)
$$;

call broken_one('1546347600000');
call working_one('1546347600000');

标签： snowflake-cloud-data-platform

Answer 1

我不认为问题出在 SQL 的大小写敏感性上，甚至不在于它是存储过程。问题是 JSON 中的属性区分大小写。试试这个，告诉我这是否更适合你。

create or replace procedure fixed_one(TIME_VALUE varchar)
returns varchar
language javascript
as
$$
var stmtString = "DELETE FROM TMP WHERE TO_TIMESTAMP(RAW_JSON:timestamp::STRING) < TO_TIMESTAMP(:1);"
var stmt = snowflake.createStatement({sqlText: stmtString, binds: [TIME_VALUE]})
var rs = stmt.execute()
rs.next()
return rs.getColumnValue(1)
$$;