SSC-FDM-0034

Struct converted to VARIANT. Some of its usages might have functional differences.

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Description

Snowflake does not natively support the STRUCT data type. SnowConvert automatically converts STRUCT to VARIANT. When used in INSERT statements, STRUCT data will be handled using OBJECT_CONSTRUCT. Be aware that this conversion may introduce functional differences in some use cases.

Code Example

Input Code:

BigQuery

IN -> BigQuery_01.sql

CREATE OR REPLACE TABLE test.structTypes
(
  COL1 STRUCT<sc1 INT64>,
  COL2 STRUCT<sc2 STRING(10)>,
  COL3 STRUCT<sc3 STRUCT<sc31 INT64, sc32 INT64>>,
  COL4 STRUCT<sc4 ARRAY<INT64>>,
  COL5 STRUCT<sc5 INT64, sc51 INT64>,
  COL7 STRUCT<sc7 INT64 OPTIONS(description = "A repeated STRING field"), sc71 BOOL>,
  COL8 STRUCT<sc8 INT64 NOT NULL, sc81 BOOL NOT NULL OPTIONS(description = "A repeated STRING field")>
);

Output Code:

Snowflake

OUT -> BigQuery_01.sql

CREATE OR REPLACE TABLE test.structTypes
(
  COL1 VARIANT /*** SSC-FDM-0034 - STRUCT<INT64> CONVERTED TO VARIANT. SOME OF ITS USAGES MIGHT HAVE FUNCTIONAL DIFFERENCES. ***/,
    COL2 VARIANT /*** SSC-FDM-0034 - STRUCT<STRING(10)> CONVERTED TO VARIANT. SOME OF ITS USAGES MIGHT HAVE FUNCTIONAL DIFFERENCES. ***/,
    COL3 VARIANT /*** SSC-FDM-0034 - STRUCT<STRUCT<INT64, INT64>> CONVERTED TO VARIANT. SOME OF ITS USAGES MIGHT HAVE FUNCTIONAL DIFFERENCES. ***/,
    COL4 VARIANT /*** SSC-FDM-0034 - STRUCT<ARRAY<INT64>> CONVERTED TO VARIANT. SOME OF ITS USAGES MIGHT HAVE FUNCTIONAL DIFFERENCES. ***/,
    COL5 VARIANT /*** SSC-FDM-0034 - STRUCT<INT64, INT64> CONVERTED TO VARIANT. SOME OF ITS USAGES MIGHT HAVE FUNCTIONAL DIFFERENCES. ***/,
    COL7 VARIANT /*** SSC-FDM-0034 - STRUCT<INT, BOOL> CONVERTED TO VARIANT. SOME OF ITS USAGES MIGHT HAVE FUNCTIONAL DIFFERENCES. ***/,
    COL8 VARIANT /*** SSC-FDM-0034 - STRUCT<INT64, BOOLEAN> CONVERTED TO VARIANT. SOME OF ITS USAGES MIGHT HAVE FUNCTIONAL DIFFERENCES. ***/
  )
COMMENT = '{ "origin": "sf_sc", "name": "snowconvert", "version": {  "major": 0,  "minor": 0,  "patch": "0" }, "attributes": {  "component": "bigquery",  "convertedOn": "05/30/2025",  "domain": "no-domain-provided" }}';

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