Postgres Function support added

[sanjeev23oct]

Postgres Function support added

Why make this change?

• Reference associated issue using # syntax. e.g. Closes #XX
  • Include summary (1-2 sentences) of linked issue to avoid redirecting reviewers to different pages.
  • Include links to any additional discussion threads related to this change.

What is this change?

• Summary of how your changes work to give reviewers context of your intent.
  • Links to relevant documentation / StackOverflow, if applicable.

How was this tested?

• [ ] Integration Tests
• [ ] Unit Tests

Sample Request(s)

• Example REST and/or GraphQL request to demonstrate modifications
• Example of CLI usage to demonstrate modifications

[sanjeev23oct]

@microsoft-github-policy-service agree

[seantleonard]

Thank you for your contribution , @sanjeev23oct. Can you fill out the PR description template with contextual info? Please also add tests for validating your changes, which will help us review.

[vs-dsva]

What is the status of this? Can it be merged?

[JerryNixon]

Resurrecting this with the PG team for review.