DBAL-522 - SQLParserUtils always throws exceptions on null bound params

Demonstrates that NULL parameters are handled incorrectly by the sql parser utils as of 2.3.4

Fixed generated sql for postgres substring function

Remove unnecessary code from Connection::insert

Shard description requires an 'id' not 'name'

Update lib/Doctrine/DBAL/Types/BlobType.php

Postgres fix for a possible unavailable dbname

Added query micro-optimization

Fixed a PHP warning in DBALException::driverExceptionDuringQuery()

added index flags to schema table

fixed bug on schema comparator, prevent multiple rename candidates for a single original field

[DBAL-264] Support for UIDs in PostgreSQL

Add getGuidExpression() to PostgreSqlPlatform so that UUID support
works properly

fix function name in exception text

This reverts commit 0b6a6aef.