Module partition_compat 

Rejects an ALTER TABLE whose column type changes would break the persisted partition expressions of a region, before any region is altered.

Bounds keep the type they were written with. Row routing compares them with row values as Values, which only stays valid across a timestamp unit widening; scans coerce the bound to the common comparison type, which can overflow (a millisecond bound in year 3000 cast to nanoseconds).

partition depends on this crate, so the Persisted* types mirror the JSON of partition::partition::PartitionBound and partition::expr::PartitionExpr. A test in partition runs real serialized expressions through this validator.

Structs

PersistedPartitionExpr 🔒

Enums

PersistedOp 🔒

PersistedOperand 🔒

PersistedPartitionBound 🔒

Functions

changed_column_types 🔒

Returns the columns present in both schemas whose type differs, as (old, new).

incompatible 🔒

validate_comparison 🔒

validate_expr 🔒

validate_operand 🔒

validate_region_partition_bounds

Returns an error naming the first region whose partition expression can’t take the type changes in changed_columns.

value_to_scalar_value 🔒

Converts a bound the same way as partition::expr::Operand::try_as_logical_expr. Returns None for values that can’t be partition bounds.