SET Volatility of helper functions used to convert string to date and time types to IMMUTABLE

[rohit01010]

Description

Currently, helper functions used by convert function for converting string to date and time related types, are marked STABLE, due to this creation of indexes and computed columns on this functions throws error as follows.

functions in index predicate must be marked IMMUTABLE 

This PR fixes this issue by updating volatility of all these helper functions used by convert function to convert from string to date and time related types, to IMMUTABLE. These functions are marked IMMUTABLE as they qualify the criteria to be a IMMUTABLE function.

Authored-by: Rohit Bhagat rohitbgt@amazon.com Signed-off-by: Rohit Bhagat rohitbgt@amazon.com

Issues Resolved

BABEL-5031

Test Scenarios Covered

• Use case based -

• Boundary conditions -

• Arbitrary inputs -

• Negative test cases -

• Minor version upgrade tests -

• Major version upgrade tests -

• Performance tests -

• Tooling impact -

• Client tests -

Check List

• [x] Commits are signed per the DCO using --signoff

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[coveralls]

Pull Request Test Coverage Report for Build 9477062128

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 73.356%

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Totals
Change from base Build 9451353483:	0.0%
Covered Lines:	42085
Relevant Lines:	57371

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💛 - Coveralls