public interface QueryErrorsBase
The trait exposes util methods for preparing error messages such as quoting of error elements.
All classes that extent QueryErrorsBase
shall follow the rules:
1. Any values shall be outputted in the SQL standard style by using toSQLValue()
.
For example: 'a string value', 1, NULL.
2. SQL types shall be double quoted and outputted in the upper case using toSQLType()
.
For example: "INT", "DECIMAL(10,0)".
3. Elements of identifiers shall be wrapped by backticks by using toSQLId()
.
For example: namespaceA
.funcB
, tableC
.
4. SQL statements shall be in the upper case prepared by using toSQLStmt
.
For example: DESC PARTITION, DROP TEMPORARY FUNCTION.
5. SQL configs and datasource options shall be wrapped by double quotes by using
toSQLConf()
/toDSOption()
.
For example: "spark.sql.ansi.enabled".
6. Any values of datasource options or SQL configs shall be double quoted.
For example: "true", "CORRECTED".
7. SQL expressions shall be wrapped by double quotes.
For example: "earnings + 1".