Examples with MERGE_ON org.jooq.Clause.MERGE_ON used on opensource projects

Example 1 with MERGE_ON

use of org.jooq.Clause.MERGE_ON in project jOOQ by jOOQ.

the class MergeImpl method toSQLStandard.

private final void toSQLStandard(Context<?> ctx) {
    ctx.start(MERGE_MERGE_INTO).visit(K_MERGE_INTO).sql(' ').declareTables(true, c -> c.visit(table)).end(MERGE_MERGE_INTO).formatSeparator().start(MERGE_USING).visit(K_USING).sql(' ');
    ctx.declareTables(true, c1 -> c1.data(DATA_WRAP_DERIVED_TABLES_IN_PARENTHESES, true, c2 -> {
        // in its MERGE statement.
        if (usingDual) {
            switch(c2.family()) {
                case DERBY:
                    c2.visit(new Dual());
                    break;
                default:
                    c2.visit(DSL.selectOne());
                    break;
            }
        } else
            c2.visit(using);
    }));
    boolean onParentheses = false;
    ctx.end(MERGE_USING).formatSeparator().start(MERGE_ON).visit(K_ON).sql(onParentheses ? " (" : " ").visit(on).sql(onParentheses ? ")" : "").end(MERGE_ON).start(MERGE_WHEN_MATCHED_THEN_UPDATE).start(MERGE_SET);
    // [#7291] Multi MATCHED emulation
    boolean emulate = false;
    boolean requireMatchedConditions = false;
    // [#10054] TODO: Skip all WHEN MATCHED clauses after a WHEN MATCHED clause with no search condition
    if (NO_SUPPORT_CONDITION_AFTER_NO_CONDITION.contains(ctx.dialect())) {
        boolean withoutMatchedConditionFound = false;
        for (MatchedClause m : matched) {
            if (requireMatchedConditions |= withoutMatchedConditionFound)
                break;
            withoutMatchedConditionFound |= m.condition instanceof NoCondition;
        }
    }
    emulateCheck: if ((NO_SUPPORT_MULTI.contains(ctx.dialect()) && matched.size() > 1)) {
        boolean matchUpdate = false;
        boolean matchDelete = false;
        for (MatchedClause m : matched) {
            if (m.delete) {
                if (emulate |= matchDelete)
                    break emulateCheck;
                matchDelete = true;
            } else {
                if (emulate |= matchUpdate)
                    break emulateCheck;
                matchUpdate = true;
            }
        }
    }
    if (emulate) {
        MatchedClause update = null;
        MatchedClause delete = null;
        Condition negate = noCondition();
        for (MatchedClause m : matched) {
            Condition condition = negate.and(m.condition);
            if (m.delete) {
                if (delete == null)
                    delete = new MatchedClause(noCondition(), true);
                delete.condition = delete.condition.or(condition);
            } else {
                if (update == null)
                    update = new MatchedClause(noCondition());
                for (Entry<Field<?>, Field<?>> e : m.updateMap.entrySet()) {
                    Field<?> exp = update.updateMap.get(e.getKey());
                    if (exp instanceof CaseConditionStepImpl)
                        ((CaseConditionStepImpl) exp).when(negate.and(condition), e.getValue());
                    else
                        update.updateMap.put(e.getKey(), when(negate.and(condition), (Field) e.getValue()).else_(e.getKey()));
                }
                update.condition = update.condition.or(condition);
            }
            if (REQUIRE_NEGATION.contains(ctx.dialect()))
                negate = negate.andNot(m.condition instanceof NoCondition ? trueCondition() : m.condition);
        }
        {
            if (delete != null)
                toSQLMatched(ctx, delete, requireMatchedConditions);
            if (update != null)
                toSQLMatched(ctx, update, requireMatchedConditions);
        }
    } else // [#7291] Workaround for https://github.com/h2database/h2database/issues/2552
    if (REQUIRE_NEGATION.contains(ctx.dialect())) {
        Condition negate = noCondition();
        for (MatchedClause m : matched) {
            toSQLMatched(ctx, new MatchedClause(negate.and(m.condition), m.delete, m.updateMap), requireMatchedConditions);
            negate = negate.andNot(m.condition instanceof NoCondition ? trueCondition() : m.condition);
        }
    } else {
        for (MatchedClause m : matched) toSQLMatched(ctx, m, requireMatchedConditions);
    }
    ctx.end(MERGE_SET).end(MERGE_WHEN_MATCHED_THEN_UPDATE).start(MERGE_WHEN_NOT_MATCHED_THEN_INSERT);
    for (NotMatchedClause m : notMatched) toSQLNotMatched(ctx, m);
    ctx.end(MERGE_WHEN_NOT_MATCHED_THEN_INSERT);
}