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Is insert with null value generate wrong sql query ? #767
Description
Hello,
I wrote a bu report to r2dbc project but they think it's related to spring data
this is the original message r2dbc/r2dbc-spi#271
And the description of the bug :
It looks like a bug
CryptoExchanges(null, null) Should generates this request : INSERT INTO "common"."CryptoExchanges" VALUES (DEFAULT, DEFAULT);
But I see it generates: INSERT INTO "common"."CryptoExchanges" VALUES (DEFAULT)
With an error : Caused by: org.h2.jdbc.JdbcSQLSyntaxErrorException: Column count does not match; SQL statement:
I join a project with last version of Spring boot, Java, Kotlin and H2 R2dbc
You can find a test inside that generate this error
And an SQL script for init the DB
@Test
fun findByExchangeCodeNotNull() {
// given
val uni = CryptoExchanges(null, "uni")
val null1 = CryptoExchanges(null, null)
cryptoExchangesRepository.saveAll(listOf(uni, null1)).collectList().block()
// when
val res = cryptoExchangesRepository.findByExchangeCodeNotNull()
// then
res.`as`(StepVerifier::create)
.expectNextMatches { it.id == 1L && it.exchangeCode == "uni" }
.expectNextMatches { it.id == 2L && it.exchangeCode == null}
.verifyComplete()
}
CREATE SCHEMA "common";
CREATE TABLE "common"."CryptoExchanges"
(
"Id" SERIAL NOT NULL,
"ExchangeCode" character varying(30)
);
INSERT INTO "common"."CryptoExchanges" VALUES (DEFAULT, 'crypto');
INSERT INTO "common"."CryptoExchanges" VALUES (DEFAULT, DEFAULT);
Activity
schauder commentedon Jul 18, 2022
Why should it create two
DEFAULTentries?DEFAULTshould only be used for id columns, shouldn't it?spring-projects-issues commentedon Jul 25, 2022
If you would like us to look at this issue, please provide the requested information. If the information is not provided within the next 7 days this issue will be closed.
mmaryo commentedon Jul 26, 2022
Hello @schauder
Sorry for the late
Honestly, I do not know if DEFAULT should be used for another thing than the ID field
But I can see :
-DEFAULT is working on all nullable fields:
INSERT INTO "common"."CryptoExchanges" VALUES (DEFAULT, DEFAULT);-The generated sql request should have 2 parameters, not one:
INSERT INTO "common"."CryptoExchanges" VALUES (DEFAULT)So the sql error is about the number of parameters
What do you think?
mshima commentedon Sep 8, 2026
MySqlDialect has a very similar issue.