Refactor PSQLRowStream to make async/await easier

This patch was authored and released by @fabianfett.

Motivation

PSQLRowStream's current implementation is interesting. It should be better tested and easier to follow for async/await support later.

Changes

• Make PSQLRowStream's implementation more sensible
• Add unit tests for PSQLRowStream

Result

Adding async/await support becomes easier.

Faster decoding, thanks to fewer bound checks.

This patch was authored by @fabianfett and released by @gwynne.

Motivation

We like faster code. This removes a ton of unnecessary bounds checks.

Result

Faster code

In draft since it requires a new NIO release.

Add proper support for `Decimal`

This patch was authored by @madsodgaard and released by @gwynne.

Fixes an issue when trying to decode/encode numeric columns as Decimal, that would result in an error such as: server: column "balance" is of type numeric but expression is of type text (transformAssignedExpr).

ByteBuffer extension, prevent naming conflicts

This patch was authored and released by @fabianfett.

Motivation

We currently extend ByteBuffer with non prefixed utility methods. This may lead to breaking code, if NIO introduces those utilities itself. As potentially planned here: apple/swift-nio#1990

Changes

Prefix all ByteBuffer utility methods

Result

Chances reduced of breaking code.

DataRow without allocation; DataRow as Collection; RowDescription top level

This patch was authored and released by @fabianfett.

This is a cherry pick of #188.

Modifications

• DataRow and RowDescription have been moved out of the PSQLBackendMessage namespace. This allows us to mark them as @inlinable or @usableFromInline at a later point, without marking everything in PSQLBackendMessage as @inlinable
• DataRow does not use an internal array for its columns anymore. Instead all read operations are directly done on its ByteBuffer slice.
• DataRow implements the Collection protocol now.

Result

One allocation fewer per queried row.

Make password hashing fast

This patch was authored by @fabianfett and released by @gwynne.

This is just a really quick patch to reduce the 320 allocations we have for hashing the password to something sensible (less than 10).

Result

In allocation analysis, password hashing doesn't appear as a biggy anymore.

PostgresNIO 1.6.2

Semver Patch

• PSQLBackendMessageDecoder is a SingleStepDecoder (#174)
• Add conveniences to PSQLFrontendMessage (#173)
• Add RowStreamStateMachine (#176)
• Extract PSQLRow (#177)
• Add BufferedMessageEncoder, fix PSQLFrontendMessageEncoder (#179)
• Batch rows for consumption (#180)
• Depend on Swift Crypto "1.0.0" ..< "3.0.0" (#183)
• Move Decoding into PSQLChannelHandler (#182)
• Move message encoding into PSQLChannelHandler (#181)
• Bump SwiftNIO dependency to 2.33.0 (#184)

Other changes

• Add PSQLBackendMessageEncoder (#175)
• Add PSQLFrontendMessageDecoder (#178)

PostgresNIO 1.6.1

SemVer Patch

• Fix NIOSSL deprecation warnings (#168) (patch credit to @jareyesda)
• Fix NIO imports (#171)

Other Changes

• Splits CI Jobs Into Unit And Integration Tests On Linux (#169) (patch credit to @dnadoba)

1.6.0

• Add platform requirements for iOS, watchOS and tvOS (#154)
• Update api-docs.yml (#156) Thanks @JaapWijnen
• Split out IntegrationTests into separate testTarget (#157)
• Use sync pipeline operations, update NIO dependencies (#152)
• Add one Auth and one SSL test case (#159)
• Fix API docs link. Resolves (#163)
• Add link to our SECURITY.md (#164)
• Use PSQLFormat when encoding and decoding (#158)
• Support AWS Redshift queries - SELECT Metadata without row number (#167) Thanks @grennis

Ignore errors when closing the connection

This patch was authored by @fabianfett and released by @0xTim.

Resolves an issue where errors thrown by some database servers during closing a connection would cause an error in PostgresNIO. Resolves #150

Modifications

• We ignore errors when the connection is already closing
• Updated logging to only issue debug and trace logs.
• Don't print password in trace logging mode.