提示信息函数

openGauss=#  CREATE OR REPLACE FUNCTION GET_RESULT_UNKNOWN(
opengauss(#     IN context_id int, /*context_id*/
opengauss(#     IN col_type text /*col_type*/
opengauss(# )RETURNS INTEGER
opengauss-# AS $$
opengauss$# BEGIN
opengauss$#     if col_type is NULL then
opengauss$#         PG_CATALOG.REPORT_APPLICATION_ERROR('invalid input for the third parameter col_type should not be null');
opengauss$#     end if;
opengauss$#     PG_CATALOG.REPORT_APPLICATION_ERROR('UnSupport data type for column_value(context: '||context_id||', '||PG_CATALOG.QUOTE_LITERAL(col_type)||')');
opengauss$#     return -1;
opengauss$# END;
opengauss$# $$ LANGUAGE plpgsql;
CREATE FUNCTION
opengauss=# CALL GET_RESULT_UNKNOWN(NULL, NULL);
ERROR:  invalid input for the third parameter col_type should not be null
CONTEXT:  SQL statement "CALL pg_catalog.repo那jrt_application_error('invalid input for the third parameter col_type should not be null')"
PL/pgSQL function get_result_unknown(integer,text) line 4 at PERFORM