postgres SQLSTATE : PQresultErrorField returns NULL - c

I am not able to get error details using the PQresultErrorField API after a query execution fails. Using PQerrorMessage on the connection gives the correct error (constraint violation xxx_pk etc etc) and PQresultStatus shows FATAL_ERROR.
However, when I use the API PQresultErrorField(result, PG_DIAG_SQLSTATE)), I get a NULL result. Other field-codes also gives me null results.
Does this API need to be compiled in ?
Postgres version is 9.2.1
Using libpq C library


It's supposed to return NULL only when it's not applicable.
That simple test works for me:
PGresult* res = PQexec(conn, "SELECT * FROM foobar");
if (res) {
if (PQresultStatus(res) == PGRES_FATAL_ERROR) {
char* p = PQresultErrorField(res, PG_DIAG_SQLSTATE);
if (p) {
printf("sqlstate=%s\n", p?p:"null");
}
}
}
Result:
sqlstate=42P01

Related

What protocol does SnowFlake JDBC driver use?

I'm trying to find out what protocol the SnowFlake JDBC library uses to communicate with SnowFlake. I see hints here and there that it seems to be using HTTPS as the protocol. Is this true?
To my knowledge, other JDBC libraries like for example for Oracle or PostgreSQL use the lower level TCP protocol to communicate with their database servers, and not the application-level HTTP(S) protocol, so I'm confused.
My organization only supports securely routing http(s)-based communication. Can I use this snowflake jdbc library then?
I have browsed all documentation that I could find, but wasn't able to answer this question.
My issue on GitHub didn't get an answer either.
Edit: Yes, I've seen this question, but I don't feel that it answers my question. SSL/TLS is an encryption, but that doesn't specify the data format.

It looks like the jdbc driver uses HTTP Client HttpUtil.initHttpClient(httpClientSettingsKey, null);, as you can see in here
The HTTP Utility Class is available here
Putting an excerpt of the session open method here in case the link goes bad/dead.
/**
* Open a new database session
*
* #throws SFException this is a runtime exception
* #throws SnowflakeSQLException exception raised from Snowflake components
*/
public synchronized void open() throws SFException, SnowflakeSQLException {
performSanityCheckOnProperties();
Map<SFSessionProperty, Object> connectionPropertiesMap = getConnectionPropertiesMap();
logger.debug(
"input: server={}, account={}, user={}, password={}, role={}, database={}, schema={},"
+ " warehouse={}, validate_default_parameters={}, authenticator={}, ocsp_mode={},"
+ " passcode_in_password={}, passcode={}, private_key={}, disable_socks_proxy={},"
+ " application={}, app_id={}, app_version={}, login_timeout={}, network_timeout={},"
+ " query_timeout={}, tracing={}, private_key_file={}, private_key_file_pwd={}."
+ " session_parameters: client_store_temporary_credential={}",
connectionPropertiesMap.get(SFSessionProperty.SERVER_URL),
connectionPropertiesMap.get(SFSessionProperty.ACCOUNT),
connectionPropertiesMap.get(SFSessionProperty.USER),
!Strings.isNullOrEmpty((String) connectionPropertiesMap.get(SFSessionProperty.PASSWORD))
? "***"
: "(empty)",
connectionPropertiesMap.get(SFSessionProperty.ROLE),
connectionPropertiesMap.get(SFSessionProperty.DATABASE),
connectionPropertiesMap.get(SFSessionProperty.SCHEMA),
connectionPropertiesMap.get(SFSessionProperty.WAREHOUSE),
connectionPropertiesMap.get(SFSessionProperty.VALIDATE_DEFAULT_PARAMETERS),
connectionPropertiesMap.get(SFSessionProperty.AUTHENTICATOR),
getOCSPMode().name(),
connectionPropertiesMap.get(SFSessionProperty.PASSCODE_IN_PASSWORD),
!Strings.isNullOrEmpty((String) connectionPropertiesMap.get(SFSessionProperty.PASSCODE))
? "***"
: "(empty)",
connectionPropertiesMap.get(SFSessionProperty.PRIVATE_KEY) != null
? "(not null)"
: "(null)",
connectionPropertiesMap.get(SFSessionProperty.DISABLE_SOCKS_PROXY),
connectionPropertiesMap.get(SFSessionProperty.APPLICATION),
connectionPropertiesMap.get(SFSessionProperty.APP_ID),
connectionPropertiesMap.get(SFSessionProperty.APP_VERSION),
connectionPropertiesMap.get(SFSessionProperty.LOGIN_TIMEOUT),
connectionPropertiesMap.get(SFSessionProperty.NETWORK_TIMEOUT),
connectionPropertiesMap.get(SFSessionProperty.QUERY_TIMEOUT),
connectionPropertiesMap.get(SFSessionProperty.TRACING),
connectionPropertiesMap.get(SFSessionProperty.PRIVATE_KEY_FILE),
!Strings.isNullOrEmpty(
(String) connectionPropertiesMap.get(SFSessionProperty.PRIVATE_KEY_FILE_PWD))
? "***"
: "(empty)",
sessionParametersMap.get(CLIENT_STORE_TEMPORARY_CREDENTIAL));
HttpClientSettingsKey httpClientSettingsKey = getHttpClientKey();
logger.debug(
"connection proxy parameters: use_proxy={}, proxy_host={}, proxy_port={}, proxy_user={},"
+ " proxy_password={}, non_proxy_hosts={}, proxy_protocol={}",
httpClientSettingsKey.usesProxy(),
httpClientSettingsKey.getProxyHost(),
httpClientSettingsKey.getProxyPort(),
httpClientSettingsKey.getProxyUser(),
!Strings.isNullOrEmpty(httpClientSettingsKey.getProxyPassword()) ? "***" : "(empty)",
httpClientSettingsKey.getNonProxyHosts(),
httpClientSettingsKey.getProxyProtocol());
// TODO: temporarily hardcode sessionParameter debug info. will be changed in the future
SFLoginInput loginInput = new SFLoginInput();
loginInput
.setServerUrl((String) connectionPropertiesMap.get(SFSessionProperty.SERVER_URL))
.setDatabaseName((String) connectionPropertiesMap.get(SFSessionProperty.DATABASE))
.setSchemaName((String) connectionPropertiesMap.get(SFSessionProperty.SCHEMA))
.setWarehouse((String) connectionPropertiesMap.get(SFSessionProperty.WAREHOUSE))
.setRole((String) connectionPropertiesMap.get(SFSessionProperty.ROLE))
.setValidateDefaultParameters(
connectionPropertiesMap.get(SFSessionProperty.VALIDATE_DEFAULT_PARAMETERS))
.setAuthenticator((String) connectionPropertiesMap.get(SFSessionProperty.AUTHENTICATOR))
.setOKTAUserName((String) connectionPropertiesMap.get(SFSessionProperty.OKTA_USERNAME))
.setAccountName((String) connectionPropertiesMap.get(SFSessionProperty.ACCOUNT))
.setLoginTimeout(loginTimeout)
.setAuthTimeout(authTimeout)
.setUserName((String) connectionPropertiesMap.get(SFSessionProperty.USER))
.setPassword((String) connectionPropertiesMap.get(SFSessionProperty.PASSWORD))
.setToken((String) connectionPropertiesMap.get(SFSessionProperty.TOKEN))
.setPasscodeInPassword(passcodeInPassword)
.setPasscode((String) connectionPropertiesMap.get(SFSessionProperty.PASSCODE))
.setConnectionTimeout(httpClientConnectionTimeout)
.setSocketTimeout(httpClientSocketTimeout)
.setAppId((String) connectionPropertiesMap.get(SFSessionProperty.APP_ID))
.setAppVersion((String) connectionPropertiesMap.get(SFSessionProperty.APP_VERSION))
.setSessionParameters(sessionParametersMap)
.setPrivateKey((PrivateKey) connectionPropertiesMap.get(SFSessionProperty.PRIVATE_KEY))
.setPrivateKeyFile((String) connectionPropertiesMap.get(SFSessionProperty.PRIVATE_KEY_FILE))
.setPrivateKeyFilePwd(
(String) connectionPropertiesMap.get(SFSessionProperty.PRIVATE_KEY_FILE_PWD))
.setApplication((String) connectionPropertiesMap.get(SFSessionProperty.APPLICATION))
.setServiceName(getServiceName())
.setOCSPMode(getOCSPMode())
.setHttpClientSettingsKey(httpClientSettingsKey);
// propagate OCSP mode to SFTrustManager. Note OCSP setting is global on JVM.
HttpUtil.initHttpClient(httpClientSettingsKey, null);
SFLoginOutput loginOutput =
SessionUtil.openSession(loginInput, connectionPropertiesMap, tracingLevel.toString());
isClosed = false;
authTimeout = loginInput.getAuthTimeout();
sessionToken = loginOutput.getSessionToken();
masterToken = loginOutput.getMasterToken();
idToken = loginOutput.getIdToken();
mfaToken = loginOutput.getMfaToken();
setDatabaseVersion(loginOutput.getDatabaseVersion());
setDatabaseMajorVersion(loginOutput.getDatabaseMajorVersion());
setDatabaseMinorVersion(loginOutput.getDatabaseMinorVersion());
httpClientSocketTimeout = loginOutput.getHttpClientSocketTimeout();
masterTokenValidityInSeconds = loginOutput.getMasterTokenValidityInSeconds();
setDatabase(loginOutput.getSessionDatabase());
setSchema(loginOutput.getSessionSchema());
setRole(loginOutput.getSessionRole());
setWarehouse(loginOutput.getSessionWarehouse());
setSessionId(loginOutput.getSessionId());
setAutoCommit(loginOutput.getAutoCommit());
// Update common parameter values for this session
SessionUtil.updateSfDriverParamValues(loginOutput.getCommonParams(), this);
String loginDatabaseName = (String) connectionPropertiesMap.get(SFSessionProperty.DATABASE);
String loginSchemaName = (String) connectionPropertiesMap.get(SFSessionProperty.SCHEMA);
String loginRole = (String) connectionPropertiesMap.get(SFSessionProperty.ROLE);
String loginWarehouse = (String) connectionPropertiesMap.get(SFSessionProperty.WAREHOUSE);
if (loginDatabaseName != null && !loginDatabaseName.equalsIgnoreCase(getDatabase())) {
sqlWarnings.add(
new SFException(
ErrorCode.CONNECTION_ESTABLISHED_WITH_DIFFERENT_PROP,
"Database",
loginDatabaseName,
getDatabase()));
}
if (loginSchemaName != null && !loginSchemaName.equalsIgnoreCase(getSchema())) {
sqlWarnings.add(
new SFException(
ErrorCode.CONNECTION_ESTABLISHED_WITH_DIFFERENT_PROP,
"Schema",
loginSchemaName,
getSchema()));
}
if (loginRole != null && !loginRole.equalsIgnoreCase(getRole())) {
sqlWarnings.add(
new SFException(
ErrorCode.CONNECTION_ESTABLISHED_WITH_DIFFERENT_PROP, "Role", loginRole, getRole()));
}
if (loginWarehouse != null && !loginWarehouse.equalsIgnoreCase(getWarehouse())) {
sqlWarnings.add(
new SFException(
ErrorCode.CONNECTION_ESTABLISHED_WITH_DIFFERENT_PROP,
"Warehouse",
loginWarehouse,
getWarehouse()));
}
// start heartbeat for this session so that the master token will not expire
startHeartbeatForThisSession();
}

Error in `select()`: ! object 'Sibling_1' not found

I am trying to change the name of a variable within a loop using select(). This is the code:
sibling_list2 = paste0("Sibling_", unlist(sibling2))
for(s in 2:length(sibling_list2)) {
dbAppendTable(conPrueba, paste0("EW_x", y),
dat %>%
inner_join(child2 %>% filter(relcode == 1) %>%
select(rel_f_person_id = person_id, person_id = sibling_list[s], (sibling_list[s] = Sibling_1), sibling_list),
by = c("person_id", "rel_f_person_id")))
}
However I get the error "Error in select():
! object 'Sibling_1' not found
Run rlang::last_error() to see where the error occurred." even though the object Sibling_1 exists.
The problem seems to be in "(sibling_list[s] = Sibling_1)". If i delete the parentheses I get another error saying "Error: unexpected '=' in:...". I also tried using the functions mutate() and rename(), but they have the same error.

postgresSQL terminating abnormally

I am trying to update postgresSQL table with psycopg2 (python package) sometimes it is failing with below error.
server closed the connection unexpectedly
This probably means the server terminated abnormally
before or while processing the request.
Here is the code
from psycopg2 import pool
now = datetime.now()
logoff_time = datetime(now.year, now.month, now.day, 15, 0, 0)
while True:
time.sleep(1)
try:
status = 'EXECUTED'
exec_type1 = 'CANCELLED'
exec_type2 = 'COMPLETED'
try:
postgreSQL_pool = pool.SimpleConnectionPool(1, 20, host = db_host,
database = db_name,
port = db_port,
user = db_user,
password = db_pwd)
if postgreSQL_pool:
print("Connection pool created successfully")
conn = postgreSQL_pool.getconn()
except (Exception, psycopg2.DatabaseError) as error:
print(error)
sql = """ UPDATE orders SET status = %s, executed_type = %s WHERE order_id = %s"""
updated_rows = 0
try:
cur = conn.cursor()
cur.execute(sql, (status, exec_type1, order_id,))
conn.commit()
updated_rows = cur.rowcount
cur.close()
break
except (Exception, psycopg2.DatabaseError) as error:
print(error)
print(updated_rows)
except Exception as e:
print(e)
psycopg2 version: '2.8.6 (dt dec pq3 ext lo64)'
Postgres: PostgreSQL 12.7 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 4.8.3 20140911 (Red Hat 4.8.3-9), 64-bit
it is pretty much simple task but facing challenges. suggestions please

The server is crashing for some reason that you might be able to read in the server's logs.

Dapper Contrib Insert MySQL Syntax Error

Hey I am getting syntax error in MySQL using Dapper.Contrib
MySQL server version for the right syntax to use near '[cause_code],[cause_name]) values ('000-DDH', 'No Money')' at line 1
the correct syntax for Insert in mysql is
"Insert Into `tbl_cause` (`cause_code`, `cause_name`) VALUES('blah', 'blah')";
my code:
var entity = new Cause { cause_code = "000-DDH", cause_name = "No Money" };
using (IDbConnection cn = ConStr.Conn())
{
long ins = cn.Insert(entity);
if (ins > 0)
{
MessageBox.Show("Cause Code: " + entity.cause_code + " Successfully Added!");
GDRD();
}
else {
MessageBox.Show("Cause Code: " + entity.cause_code + " While trying to Add an Error Occurred!");
}
}
how to solve this? thanks in Advance

It's you again :)
Does the class Cause have a Table("tbl_cause") directive?
Read the dapper contrib extensions documentation here

opa database : how to know if value exists in database?

I'd like to know if a record is present in a database, using a field different from the key field.
I've try the following code :
function start()
{
jlog("start db query")
myType d1 = {A:"rabbit", B:"poney"};
/myDataBase/data[A == d1.A] = d1
jlog("db write done")
option opt = ?/myDataBase/data[B == "rabit"]
jlog("db query done")
match(opt)
{
case {none} : <>Nothing in db</>
case {some:data} : <>{data} in database</>
}
}
Server.start(
{port:8092, netmask:0.0.0.0, encryption: {no_encryption}, name:"test"},
[
{page: start, title: "test" }
]
)
But the server hang up, and never get to the line jlog("db query done"). I mispell "rabit" willingly. What should I've done ?
Thanks

Indeed it fails with your example, I have a "Match failure 8859742" exception, don't you see it?
But do not use ?/myDataBase/data[B == "rabit"] (which should have been rejected at compile time - bug report sent) but /myDataBase/data[B == "rabit"] which is a DbSet. The reason is when you don't use a primary key, then you can have more than one value in return, ie a set of values.
You can convert a dbset to an iter with DbSet.iterator. Then manipulate it with Iter: http://doc.opalang.org/module/stdlib.core.iter/Iter

Resources