Google bigquery BigQuery如何使用合并加载数组列

我有一个测试表，我正试图从GCS存储中加载该表：

CREATE OR REPLACE TABLE ta_producer_conformed.test
(
  id NUMERIC,
  array_string ARRAY<STRING>,
  array_struct_string_string ARRAY<STRUCT<key STRING,  value STRING>>,
  array_struct_string_numeric ARRAY<STRUCT<key STRING,  value NUMERIC>>,
  array_struct_string_int64 ARRAY<STRUCT<key STRING,  value INT64>>
)

在其中，我使用JSON保存数组类型：

"id"    "array_string"  "struct_string_string"  "struct_string_numberic"    "struct_string_int64"
1   ["one", "two", "three"] [{"key":"one", "value":"1"},{"key":"two", "value":"2"},{"key":"three", "value":"3"}]    [{"key":"one", "value":1.1},{"key":"two", "value":2.2}] [{"key":"one", "value":11},{"key":"two", "value":22}]
2   ["four", "five", "six"] [{"key":"four", "value":"4"},{"key":"five", "value":"5"},{"key":"six", "value":"6"}]    [{"key":"three", "value":3.3},{"key":"four", "value":4.4}]  [{"key":"three", "value":33},{"key":"four", "value":44}]

然后，我想使用合并在目标表中向上插入数据。当我运行此命令时：

CREATE TEMPORARY FUNCTION ARRAY_OF(json STRING)
RETURNS ARRAY<STRING>
LANGUAGE js AS """
  let parsed = JSON.parse(json);
  return parsed;
""";
CREATE TEMPORARY FUNCTION ARRAY_STRUCT_STRING_STRING_OF(json STRING)
RETURNS ARRAY<STRUCT<key STRING, value STRING>>
LANGUAGE js AS """
  let parsed = JSON.parse(json);
  return parsed;
""";
CREATE TEMPORARY FUNCTION ARRAY_STRUCT_STRING_NUMERIC_OF(json STRING)
RETURNS ARRAY<STRUCT<key STRING, value NUMERIC>>
LANGUAGE js AS """
  let parsed = JSON.parse(json);
  return parsed;
""";
CREATE TEMPORARY FUNCTION ARRAY_STRUCT_STRING_INT64_OF(json STRING)
RETURNS ARRAY<STRUCT<key STRING, value INT64>>
LANGUAGE js AS """
  let parsed = JSON.parse(json);
  return parsed;
""";
MERGE ta_producer_conformed.test T
USING ta_producer_raw.test_raw S
ON
    S.id = T.id
WHEN NOT MATCHED THEN
    INSERT (id, array_string, array_struct_string_string, array_struct_string_numeric, array_struct_string_int64)
    VALUES (
        id, 
        ARRAY_OF(array_string), 
        ARRAY_STRUCT_STRING_STRING_OF(struct_string_string),
        ARRAY_STRUCT_STRING_NUMERIC_OF(struct_string_numberic),
        ARRAY_STRUCT_STRING_INT64_OF(struct_string_int64)
    )
WHEN MATCHED THEN UPDATE SET
        T.id = S.id, 
        T.array_string = ARRAY_OF(S.array_string), 
        T.struct_string_string = ARRAY_STRUCT_STRING_STRING_OF(S.struct_string_string),
        T.ARRAY_STRUCT_STRING_NUMERIC_OF(S.struct_string_numberic),
        T.ARRAY_STRUCT_STRING_INT64_OF(S.struct_string_int64)

如果我删除了WHEN MATCHED的最后一个部分，这样只插入临时函数就可以了。所以问题似乎是，在final-THEN-updateset部分中，我不能使用临时函数

在理想情况下，如何使用单个MERGE语句从外部bucket加载数据类型（如ARRAY和ARRAY）

更新：我尝试使用公共表表达式来预处理数据，方法是：

WITH cteConvertJason AS (
  SELECT 
        id, 
        ARRAY_OF(array_string) AS array_string, 
        ARRAY_STRUCT_STRING_STRING_OF(struct_string_string) AS struct_string_string,
        ARRAY_STRUCT_STRING_NUMERIC_OF(struct_string_numberic) AS struct_string_numberic,
        ARRAY_STRUCT_STRING_INT64_OF(struct_string_int64) AS struct_string_int64
  FROM
    ta_producer_raw.test_raw
)
MERGE ta_producer_conformed.test T
USING cteConvertJason S
...

这产生了一个错误，因此看起来您与合并

更新：出于遗留原因，我们尝试了TSV。最好使用换行符分隔的JSON作为格式，这样就不需要显式解析嵌套的或重复的列。

事实证明，使用源的合并目标可以使用查询作为源。该查询可以运行临时函数来预处理源数据。然后，MERGE语句的其余部分可以正常工作：

CREATE TEMPORARY FUNCTION ARRAY_OF(json STRING)
RETURNS ARRAY<STRING>
LANGUAGE js AS """
  let parsed = JSON.parse(json);
  return parsed;
""";
CREATE TEMPORARY FUNCTION ARRAY_STRUCT_STRING_STRING_OF(json STRING)
RETURNS ARRAY<STRUCT<key STRING, value STRING>>
LANGUAGE js AS """
  let parsed = JSON.parse(json);
  return parsed;
""";
CREATE TEMPORARY FUNCTION ARRAY_STRUCT_STRING_NUMERIC_OF(json STRING)
RETURNS ARRAY<STRUCT<key STRING, value NUMERIC>>
LANGUAGE js AS """
  let parsed = JSON.parse(json);
  return parsed;
""";
CREATE TEMPORARY FUNCTION ARRAY_STRUCT_STRING_INT64_OF(json STRING)
RETURNS ARRAY<STRUCT<key STRING, value INT64>>
LANGUAGE js AS """
  let parsed = JSON.parse(json);
  return parsed;
""";
MERGE ta_producer_conformed.test T
USING 
 (
  SELECT 
        id, 
        ARRAY_OF(array_string) AS array_string, 
        ARRAY_STRUCT_STRING_STRING_OF(struct_string_string) AS struct_string_string,
        ARRAY_STRUCT_STRING_NUMERIC_OF(struct_string_numberic) AS struct_string_numberic,
        ARRAY_STRUCT_STRING_INT64_OF(struct_string_int64) AS struct_string_int64
  FROM
    ta_producer_raw.test_raw
)
 S
ON
    S.id = T.id
WHEN NOT MATCHED THEN
    INSERT (id, array_string, array_struct_string_string, array_struct_string_numeric, array_struct_string_int64)
    VALUES (
        id, 
        array_string, 
        struct_string_string,
        struct_string_numberic,
        struct_string_int64
    )
WHEN MATCHED THEN UPDATE SET
        T.array_string = S.array_string, 
        T.array_struct_string_string = S.struct_string_string,
        T.array_struct_string_numeric = S.struct_string_numberic,
        T.array_struct_string_int64 = S.struct_string_int64

WITH cteConvertJason AS (
  SELECT 
        id, 
        ARRAY_OF(array_string) AS array_string, 
        ARRAY_STRUCT_STRING_STRING_OF(struct_string_string) AS struct_string_string,
        ARRAY_STRUCT_STRING_NUMERIC_OF(struct_string_numberic) AS struct_string_numberic,
        ARRAY_STRUCT_STRING_INT64_OF(struct_string_int64) AS struct_string_int64
  FROM
    ta_producer_raw.test_raw
)
MERGE ta_producer_conformed.test T
USING cteConvertJason S
...

CREATE TEMPORARY FUNCTION ARRAY_OF(json STRING)
RETURNS ARRAY<STRING>
LANGUAGE js AS """
  let parsed = JSON.parse(json);
  return parsed;
""";
CREATE TEMPORARY FUNCTION ARRAY_STRUCT_STRING_STRING_OF(json STRING)
RETURNS ARRAY<STRUCT<key STRING, value STRING>>
LANGUAGE js AS """
  let parsed = JSON.parse(json);
  return parsed;
""";
CREATE TEMPORARY FUNCTION ARRAY_STRUCT_STRING_NUMERIC_OF(json STRING)
RETURNS ARRAY<STRUCT<key STRING, value NUMERIC>>
LANGUAGE js AS """
  let parsed = JSON.parse(json);
  return parsed;
""";
CREATE TEMPORARY FUNCTION ARRAY_STRUCT_STRING_INT64_OF(json STRING)
RETURNS ARRAY<STRUCT<key STRING, value INT64>>
LANGUAGE js AS """
  let parsed = JSON.parse(json);
  return parsed;
""";
MERGE ta_producer_conformed.test T
USING 
 (
  SELECT 
        id, 
        ARRAY_OF(array_string) AS array_string, 
        ARRAY_STRUCT_STRING_STRING_OF(struct_string_string) AS struct_string_string,
        ARRAY_STRUCT_STRING_NUMERIC_OF(struct_string_numberic) AS struct_string_numberic,
        ARRAY_STRUCT_STRING_INT64_OF(struct_string_int64) AS struct_string_int64
  FROM
    ta_producer_raw.test_raw
)
 S
ON
    S.id = T.id
WHEN NOT MATCHED THEN
    INSERT (id, array_string, array_struct_string_string, array_struct_string_numeric, array_struct_string_int64)
    VALUES (
        id, 
        array_string, 
        struct_string_string,
        struct_string_numberic,
        struct_string_int64
    )
WHEN MATCHED THEN UPDATE SET
        T.array_string = S.array_string, 
        T.array_struct_string_string = S.struct_string_string,
        T.array_struct_string_numeric = S.struct_string_numberic,
        T.array_struct_string_int64 = S.struct_string_int64