Struct VarRef

query/expr/ast.go:182–205

VarRef represents a reference to a variable.

// VarRef represents a reference to a variable.
type VarRef struct {
	Val      string
	ExprType Type

	// The following fields are populated for convenience after the query is
	// validated against the schema.

	// ID of the table in the query scope (0 for the main table, 1+ for foreign
	// tables).
	TableID int
	// ID of the column in the schema.
	ColumnID int
	// Enum dictionary for enum typed column. Can only be accessed while holding
	// the schema lock.
	EnumDict map[string]int `json:"-"`
	// Setting enum reverse dict requires holding the schema lock,
	// while reading from it does not require holding the schema lock.
	EnumReverseDict []string `json:"-"`

	DataType memCom.DataType

	// Whether this column is hll column (can run hll directly)
	IsHLLColumn bool
}

// Type returns the type.
func (r *VarRef) Type() Type {