validateSchemaLiteral(exp: Expression): StructTypeJsonToStructs Unary Expression
JsonToStructs is a unary expression with timezone support and CodegenFallback that represents from_json function.
Parsing Table Schema for String Literals — validateSchemaLiteral Method
validateSchemaLiteral requests CatalystSqlParser to parseTableSchema for Literal of StringType.
For any other non-StringType types, validateSchemaLiteral reports a AnalysisException:
Expected a string literal instead of [expression]