Issues and Troubleshooting
In this section, you will find information about Errors, Warnings, and Issues on the SnowConvert.
Before we get too far down the troubleshooting road, recall that we highly recommend that you go through our training labs in order to get the most out of SnowConvert.
Conversions of any large quantity of code will likely have a few errors and warnings. Mobilize.Net has been the leading authority on code conversion for 25 years, and trust us, we understand this. When using any of our products, you can count on us to be your partner in resolving any errors you may encounter.
Below is a list of specific conversion issues for Oracle that you may see when you perform a conversion with SnowConvert along with a severity level for each. Some suggested solution paths based on the severity level will follow the list of codes.
Take a minute to read through the list and the troubleshooting tips to help diagnose some of the error codes you have encountered. If you have a question that cannot be answered here, please reach out! You can post in the SnowConvert forums or drop us an email at [email protected]. This is a living list, so it will grow and change as SnowConvert evolves. Updates to issue and error handling will appear on this page, and will also appear in the release notes.

Issues Code

Parsing errors, conversion exceptions caused by SnowConvert. The user should contact to Mobilize Team to fix the issue
Code
Description
Severity
The create sequence 'start with' statement value can not be LIMIT VALUE
Medium
Foreign key mismatch
Medium
OUTER JOIN syntax changed
Low
Syntax not supported
High
The format may be needed
Low
Timestamp output format
Low
Different output
Low
Unknown format
Medium
JSON_TABLE not supported
High
XMLTABLE not supported
High
Format parameter not supported
Medium
Call specification not supported
Medium
NLS Parameter not supported
Medium
NLSSORT not supported
Medium
NLSSORT transformed
Low
Xml not supported
Medium
DBTIMEZONE removed
Low
Snowflake does not support occurrence parameter
Low
USING NCHAR_CS not supported
Low
Negative values not supported for function
Medium
SQL implicit cursor values may differ
Low
Siblings not supported
Low
RANK AGGREGATE function not supported
High
Table properties not required
Low
Synonyms not supported
Low
Rowid not supported
Medium
Rownum not supported
Medium
Multiset operator not supported
Medium
The default value on conversion error, not supported
Medium
Keep statement used to indicate that only the first or last values of the aggregate function will be returned is not supported
Medium
Not suitable function found to replace the input parameter for SYSCONTEXT
Medium
The specified parameter for the function is not supported
Medium
PLDeclaration in WITH statement not supported
Medium
Package Procedure/Function declaration heading not necessary
Low
The table collection expression is not supported
High
Arithmetic types not supported
Medium
Using index constraint state removed
Low
Search clause removed
Low
Cycle clause removed
Low
Statements and keywords removed from the column definition
Low
Enable or disable constraint state removed
Low
Model clause removed
Low
Create table statements removed
Low
Sequence option removed
Low
Missing dependencies objects
Low
Alter Table syntax is not applicable in Snowflake
Medium
TO_NCHAR transformed to TO_VARCHAR
Low
Function language not supported.
High
Package member not supported
Medium
Call to User Defined function not supported inside queries
High
PRAGMA EXCEPTION_INIT Not Supported
Low
Exception declaration is handled by the raise function
Low
User defined function was transformed to Snowflake procedure
Low
Package constant declaration
Low
Wrapped element not supported
Medium
Object versioning is not supported
Low
Nested Procedure or Function not supported
Medium
Date format session parameter
Low
Alter session configuration is not supported
Medium
Default value for SYSDATE is CURRENT_TIMESTAMP
Low
Column was transformed from DATE to TIMESTAMP
Low
NLS_NUMERIC_CHARACTERS session parameter not supported
Medium
Query using WITH TIES clause is missing ORDER BY
Low
Snowflake default calendar is Gregorian. It is not necessary to specify as a parameter
Low
NOCYCLE property is not supported
Medium
Add to stack of errors is not supported, boolean argument was removed
Low
Multiple Constraint Definition in a single statement is not supported in Snowflake
Medium
The create sequence 'start with' statement value exceeds the max value allowed by Snowflake.
Medium
CURRVAL property is not supported in Snowflake
Medium
Binary Operation Not Supported
Medium
Set Quantifier Not Supported
Low
Procedural Member not supported
Medium
Create Database Link Not Supported
High
Create Index Not Supported
High
Labels in statements not supported
Medium
Built In Package Not Supported
Medium
Semantic information missing for ROWTYPE attribute
Low
Unable to parse dynamic SQL statement inside Execute Immediate
Medium
INSTR function converted to REGEXP_INSTR
Low
Create Type Not Supported
High
Snowflake Non-Ansi Outer Join has some functional differences compared to Oracle
Low
Cannot Convert Nested Type Attribute Expression
Medium
Unsupported format used for Trunc function
Low

Issues Severity

In this section, you could find an explanation of the severities.

Low

Warnings for source code that there was no direct conversion to Snowflake. The code has been converted to a functionally equivalent output but should still be reviewed.

Medium

Warnings for source code that there was no direct conversion to Snowflake. The code has been converted to a functionally equivalent output but should still be reviewed.

High

Errors that produce a functional or runtime difference. The user may have to invest a high amount of manual effort to complete the conversion.v

Critical

Parsing errors or errors that cause significant conversion exceptions in SnowConvert. If the source code is correct, a significant intervention will be required.

Need more support?

As has been mentioned previously in this article, please reach out to us if you need more support. Mobilize.Net wants to be your partner in the conversion process, so let us know how we can help. You can email us at [email protected] or post a message to our forums. If you have a contract for support with Mobilize.Net, reach out to your sales engineer and they can direct your support needs.
Last modified 19h ago