SSC-FDM-TS0005

TRY_CONVERT/TRY_CAST could not be converted to TRY_CAST

Description

This FMD is added when a TRY_CONVERT or TRY_CAST cannot be converted to a TRY_CAST in Snowflake.

Snowflake's TRY_CAST function has a limitation as it only allows the conversion of string expressions. However, Transact's TRY_CONVERT and TRY_CAST functions allow any data type expression.

Currently, the transformation from TRY_CONVERT or TRY_CAST to Snowflake's TRY_CAST is only performed for string expressions or expressions that the tool can identify as strings in its context.

Code Example

Input Code:

IN -> SqlServer_01.sql

SELECT TRY_CAST(14.85 AS INT);
SELECT TRY_CONVERT(VARCHAR, 1234);
SELECT TRY_CONVERT(CHAR, 1);
SELECT TRY_CONVERT(SQL_VARIANT, '2017-01-01 12:00:00');
SELECT TRY_CONVERT(GEOGRAPHY, 'LINESTRING(-122.360 47.656, -122.343 47.656 )');

Output Code:

OUT -> SqlServer_01.sql

SELECT
CAST(14.85 AS INT) /*** SSC-FDM-TS0005 - TRY_CONVERT/TRY_CAST COULD NOT BE CONVERTED TO TRY_CAST ***/;
SELECT
TO_VARCHAR(1234);
SELECT
TO_CHAR(1);
SELECT
TO_VARIANT('2017-01-01 12:00:00');
SELECT
TO_GEOGRAPHY('LINESTRING(-122.360 47.656, -122.343 47.656 )');

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