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Add description for test hints

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This commit is contained in:
Azat Khuzhin 2021-06-01 08:54:28 +03:00
parent 69cf881947
commit ffacb7dcdf
1 changed files with 29 additions and 3 deletions
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32
programs/client/TestHint.h
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@ -11,9 +11,35 @@
namespace DB
{
/// Checks expected server and client error codes in testmode.
/// To enable it add special comment after the query: "-- { serverError 60 }" or "-- { clientError 20 }".
/// Also you can enable echoing all queries by writing "-- { echo }".
/// Checks expected server and client error codes in --testmode.
///
/// The following comment hints are supported:
///
/// - "-- { serverError 60 }" -- in case of you are expecting server error.
///
/// - "-- { clientError 20 }" -- in case of you are expecting client error.
///
/// Remember that the client parse the query first (not the server), so for
/// example if you are expecting syntax error, then you should use
/// clientError not serverError.
///
/// Examples:
///
/// - echo 'select / -- { clientError 62 }' | clickhouse-client --testmode -nm
///
// Here the client parses the query but it is incorrect, so it expects
/// SYNTAX_ERROR (62).
///
/// - echo 'select foo -- { serverError 47 }' | clickhouse-client --testmode -nm
///
/// But here the query is correct, but there is no such column "foo", so it
/// is UNKNOWN_IDENTIFIER server error.
///
/// The following hints will control the query echo mode (i.e print each query):
///
/// - "-- { echo }"
/// - "-- { echoOn }"
/// - "-- { echoOff }"
class TestHint
{
public: