For PostgreSQL 10+ jOOQ will now render identity columns using the
standard `GENERATED BY DEFAULT AS IDENTITY` clause. For PostgreSQL 9 the
implementation continues to use the `SERIAL4` and `SERIAL8` types.
In addition to runtime schema and table mapping,
`Settings#renderMapping` now also supports mapping of catalogs. This is
represented by the new `RenderMapping#catalogs`, which in turn can
contain mapping definitions for schemata and tables.
For backwards compatibility and for applications where no catalog
mapping is required, the old `RenderMapping#schemata` remains. Users are
expected to use _either_ of 'RenderMapping#catalogs` or
`RenderMapping#schemata`, but not both.
Instead of running a separate query to check if the table has any
identity column this is now being done with a `COUNT(*) FILTER (WHERE
is_identity = 'YES') OVER ()` expression.
The code generator will now generate a call to the new
`Internal#createQueue()` factory method instead of directly calling the
`QueueImpl` constructor.
The jOOQ code generator will now only map `COLUMNS.IS_IDENTITY` to
`ColumnDefinition#isIdentity()` if the table has a column for which
`COLUMNS.IS_IDENTITY` is `YES`. Otherwise it will continue to check if
the default value starts with `nextval`.
While `CURRENT_TIME` doesn't work in the CockroachDB release we
currently use in our integration testing, the necessary changes have
apparently already been integrated. This commit adjusts `CurrentTime`
accordingly so that it will work properly against releases which have
this built-in implemented.
By default (`Settings#renderParenthesisAroundSetOperationQueries =
false`) jOOQ will attempt to avoid rendering parenthesis pairs around
the queries combined with set operators (e.g. `UNION` or `UNION ALL`).
In situations where this causes problems, i.e. when the parenthesis pair
is required, the setting can be set to `true` in which case the
parenthesis pair will always be rendered around each of the combined
queries.
As of PostgreSQL 10.0 the column
`INFORMATION_SCHEMA.COLUMNS.IS_IDENTITY` can be used to determine
whether a column represents a table's identity column or not. This is
now used by jOOQ's code generator and for older releases it will
continue to check wheter the default value (i.e. using
`INFORMATION_SCHEMA.COLUMNS.COLUMN_DEFAULT`) starts with `NEXTVAL`.
