Refine postgres data connector get_schema method #3

	---
	name: pr

	on:
	pull_request:
	branches:
	- main

	jobs:
	lint:
	name: Clippy
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v4

	- uses: dtolnay/rust-toolchain@stable

	- name: Install Protoc
	uses: arduino/setup-protoc@v3
	with:
	repo-token: ${{ secrets.GITHUB_TOKEN }}

	- run: cargo clippy --all-features -- -D warnings

	build:
	name: Build
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v4

	- uses: dtolnay/rust-toolchain@stable

	# Putting this into a GitHub Actions matrix will run a separate job per matrix item, whereas in theory
	# this can re-use the existing build cache to go faster.
	- name: Build without default features
	run: cargo check --no-default-features

	- name: Build with only duckdb
	run: cargo check --no-default-features --features duckdb

	- name: Build with only postgres
	run: cargo check --no-default-features --features postgres

	- name: Build with only sqlite
	run: cargo check --no-default-features --features sqlite

	- name: Build with only mysql
	run: cargo check --no-default-features --features mysql

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