scope

type CTEDefinition struct {
	Name    string
	Columns []string
	// Lineage edges within the CTE
	Lineage []model.ColumnRelation
}

type ColumnLookup func() []string

type ColumnRef struct {
	Schema string
	Table  string
	Column string
	// Resolved marks a reference that was already resolved against the scope it
	// originated in, so a later lookup does not bind it to a different relation
	// that happens to share the name. Every analyzer sets it where the resolved
	// table lives in a scope a later lookup cannot see: a set-operation arm, a
	// flattened expression subquery, an expanded wildcard.
	Resolved bool
}

type ColumnSource struct {
	Ref       ColumnRef
	Transform []model.Transformation
}

type OutputColumn struct {
	Alias string // The alias given to this column (AS clause)
	// Sources are the columns this output depends on, each carrying the
	// transformation that produced it.
	Sources []ColumnSource
	// Whether this is a derived/transformed column
	IsDerived bool
}

type RelationKey struct {
	Qualifier string
	Name      string
}

type ResolvedColumn struct {
	Ref      ColumnRef
	Relation *TableRef
}

type Scope struct {
	// contains filtered or unexported fields
}

type TableRef struct {
	Schema string
	Table  string
	Alias  string
	// For subqueries and CTEs
	IsSubquery bool
	IsCTE      bool
	// Lineage edges for subqueries (how output columns relate to source tables)
	Lineage []model.ColumnRelation
	// contains filtered or unexported fields
}