Module relational 

Parameterized SQL lowering shared by the three relational backend adapters. Connection, isolation, error mapping, and migration execution remain with the SQLite, PostgreSQL, and MySQL adapter crates.

Structs

Builder 🔒

ReservationStatements

Prepared statements for one reservation decision under a backend transaction.

Statement

One safely parameterized statement; values never enter its SQL text.

Enums

Dialect

The physical placeholder and identifier convention selected by an adapter.

Functions

adoption_cursor

Extracts the next stable identity cursor from a bounded adoption page.

column

Produces one physical column declaration without accepting raw SQL.

compile_aggregate

Compiles one count, sum, minimum, or maximum over declared fields.

compile_claim_select

Compiles an ordered, one-record claim selection with backend row locking.

compile_delete_effects

Keeps JSON relationship values synchronized when native constraints null their keys. The caller executes these bounded statements in the same transaction as deletion.

compile_detached_delete_effects

Lowers referential delete actions when an adapter temporarily detaches native constraints. Descendants are removed before their parents; the adapter verifies restrictive references before committing. Every predicate retains the ordinary typed parameter bindings.

compile_ensured_identity_query

Looks up the identity of an inserted or pre-existing unique record inside the same transaction. The caller must hold its transaction until this read.

compile_mutation

Compiles one validated transaction step against previous generated IDs.

compile_query

Compiles one bounded logical query to parameterized SQL.

compile_reservation

compile_schema_change

Compiles one additive logical migration step into SQL statements. The executing adapter must guard these statements with its migration ledger.

conditional_index 🔒

Compiles one declared conditional or case-folded index.

current_timestamp_sql

Keeps generated timestamps consistent in inserts, schema defaults and backfills.

ddl_field_literal 🔒

ddl_filter 🔒

Encodes a schema-owned partial-index condition without request interpolation.

ddl_literal 🔒

Encodes a schema-owned literal in DDL; request values never use this path.

derived_adoption_query

Builds an ordered, bounded migration page for expression-key adoption.

derived_adoption_statements

Repairs expression keys from a locked migration page without changing original values.

derived_column

Declares a nullable physical key whose Unicode mapping is owned by Rust.

derived_field

Describes a protected comparison column for creation and interrupted-DDL verification.

expression_index 🔒

Lowers an index with an explicit physical encoding; runtime writes use protected keys.

field_copy_query

Selects one bounded page for a typed field-copy migration.

field_copy_statements

Uses ordinary typed mutation lowering for historical copy values and derived keys.

field_default_sql

Lowers one declared default for schema creation and physical storage adoption.

foreign_key_clause 🔒

Emits a MySQL table constraint because inline REFERENCES does not enforce it.

previous_expression_index

Describes the retired native-lowercase encoding solely for validated storage adoption.

record_values

Resolves logical record fields to safe SQL bind values before import.

resolve_value 🔒

Resolves a transaction-local value from a previous insert result.

sql_type

Maps a logical field to one backend-specific physical scalar type. Returns the physical field declaration used by schema creation and catalog verification.