asmhatre
807f681ed1
Same payment hierarchy mapped three ways plus @MappedSuperclass, run with plain Hibernate on H2. Tests assert and write the generated DDL, the INSERT/SELECT SQL, row/insert/FK/nullability counts and the three failures (NOT NULL on a SINGLE_TABLE subclass column, IDENTITY with TABLE_PER_CLASS, querying a @MappedSuperclass); Bench writes indicative polymorphic-query timings. No docs folder: depth lives in the post.
36 lines
1.9 KiB
Plaintext
36 lines
1.9 KiB
Plaintext
-- strategy TABLE_PER_CLASS, Hibernate 7.4.13.Final
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== persist 3 payments and 1 order: 4 INSERT statements
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insert into tp_card_payment (amount,currency,card_last4,network,id) values (?,?,?,?,?);
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insert into tp_bank_transfer_payment (amount,currency,bank_code,iban,id) values (?,?,?,?,?);
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insert into tp_wallet_payment (amount,currency,provider,id) values (?,?,?,?);
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insert into tp_order (payment_id,reference,id) values (?,?,?);
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== select p from TpPayment p (polymorphic, returns 3 rows)
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select p1_0.id,p1_0.clazz_,p1_0.amount,p1_0.currency,p1_0.bank_code,p1_0.iban,p1_0.card_last4,p1_0.network,p1_0.provider
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from (select amount, card_last4, currency, id, network, null as bank_code, null as iban, null as provider, 1 as clazz_
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from tp_card_payment
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union all
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select amount, null as card_last4, currency, id, null as network, bank_code, iban, null as provider, 2 as clazz_
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from tp_bank_transfer_payment
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union all
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select amount, null as card_last4, currency, id, null as network, null as bank_code, null as iban, provider, 3 as clazz_
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from tp_wallet_payment) p1_0
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order by p1_0.id;
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== from TpCardPayment (one subclass, returns 1 row)
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select cp1_0.id,cp1_0.amount,cp1_0.currency,cp1_0.card_last4,cp1_0.network
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from tp_card_payment cp1_0;
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== select o from TpOrder o join fetch o.payment (association to the root)
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select po1_0.id,po1_0.payment_id,p1_0.id,p1_0.clazz_,p1_0.amount,p1_0.currency,p1_0.bank_code,p1_0.iban,p1_0.card_last4,p1_0.network,p1_0.provider,po1_0.reference
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from tp_order po1_0
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join (select amount, card_last4, currency, id, network, null as bank_code, null as iban, null as provider, 1 as clazz_
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from tp_card_payment
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union all
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select amount, null as card_last4, currency, id, null as network, bank_code, iban, null as provider, 2 as clazz_
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from tp_bank_transfer_payment
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union all
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select amount, null as card_last4, currency, id, null as network, null as bank_code, null as iban, provider, 3 as clazz_
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from tp_wallet_payment) p1_0 on p1_0.id=po1_0.payment_id;
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