Module legacy_patterns 

Restore predecessor compiler pattern markers only at retained-definition boundaries.

Structs

SchemaPatternMigration

Functions

restore_expression

Stored syntax traversal visits parents first, retaining outer negation before its child changes.

restore_expression_plan

Keep analyzed rule constants and subquery identities while upgrading their pattern nodes.

restore_query

The scalar walker visits children first. Identify legacy negative calls before replacing positive markers.

restore_schema

The retained-resource adapter uses these flags to rebind and publish in its existing initial-open transaction.

restore_statement

Restore retained statement syntax before binding copies, so new escape children have matching syntax sites.