DatumAsBool transforms a tree.TypedExpr containing a Datum into a bool.

DatumAsDuration transforms a tree.TypedExpr containing a Datum into a time.Duration.

DatumAsFloat transforms a tree.TypedExpr containing a Datum into a float.

DatumAsInt transforms a tree.TypedExpr containing a Datum into an int.

DatumAsString transforms a tree.TypedExpr containing a Datum into a string.

GetSingleBool returns the boolean if the input Datum is a DBool, and returns a detailed error message if not.

ParseBoolVar parses a bool, allowing other settings such as "yes"/"no"/"on"/"off".

UnresolvedNameToStrVal converts an unresolved name to a string value.

ValidateUniqueConstraintParams checks if there is any storage parameters invalid as a param for Unique Constraint.

UniqueConstraintParamContext is used as a validation context for ValidateUniqueConstraintParams function.