13389227868

Committed 18 Feb 2025 11:10AM UTC coverage: 59.667% (+0.9%) from 58.785%

Build # 13389227868

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torand

Commit Message

test: H2 specific testing of select and insert clauses

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/src/main/java/io/github/torand/fastersql/statement/SelectStatement.java

/*
 * Copyright (c) 2024 Tore Eide Andersen
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.github.torand.fastersql.statement;

import io.github.torand.fastersql.Context;
import io.github.torand.fastersql.Field;
import io.github.torand.fastersql.Join;
import io.github.torand.fastersql.Table;
import io.github.torand.fastersql.expression.Expression;
import io.github.torand.fastersql.function.aggregate.AggregateFunction;
import io.github.torand.fastersql.order.Order;
import io.github.torand.fastersql.predicate.OptionalPredicate;
import io.github.torand.fastersql.predicate.Predicate;
import io.github.torand.fastersql.projection.Projection;
import io.github.torand.fastersql.subquery.Subquery;

import java.util.LinkedList;
import java.util.List;
import java.util.Set;
import java.util.function.Supplier;
import java.util.stream.Stream;

import static io.github.torand.fastersql.Command.SELECT;
import static io.github.torand.fastersql.dialect.Capability.LIMIT_OFFSET;
import static io.github.torand.fastersql.statement.Helpers.unwrapSuppliers;
import static io.github.torand.fastersql.util.collection.CollectionHelper.asList;
import static io.github.torand.fastersql.util.collection.CollectionHelper.concat;
import static io.github.torand.fastersql.util.collection.CollectionHelper.isEmpty;
import static io.github.torand.fastersql.util.collection.CollectionHelper.nonEmpty;
import static io.github.torand.fastersql.util.collection.CollectionHelper.streamSafely;
import static io.github.torand.fastersql.util.contract.Requires.require;
import static io.github.torand.fastersql.util.contract.Requires.requireNonEmpty;
import static io.github.torand.fastersql.util.functional.Functions.castTo;
import static io.github.torand.fastersql.util.functional.Optionals.mapIfNonNull;
import static io.github.torand.fastersql.util.functional.Predicates.instanceOf;
import static io.github.torand.fastersql.util.functional.Predicates.not;
import static io.github.torand.fastersql.util.lang.StringHelper.isBlank;
import static io.github.torand.fastersql.util.lang.StringHelper.nonBlank;
import static java.util.Objects.isNull;
import static java.util.Objects.nonNull;
import static java.util.Objects.requireNonNull;
import static java.util.stream.Collectors.joining;
import static java.util.stream.Collectors.toSet;

public class SelectStatement extends PreparableStatement {
    private final List<Projection> projections;
    private final List<Table<?>> tables;
    private final List<Join> joins;
    private final Subquery subqueryFrom;
    private final List<Predicate> predicates;
    private final List<Field> groups;
    private final List<Order> orders;
    private final boolean distinct;
    private final Long limit;
    private final Long offset;
    private final boolean forUpdate;

    SelectStatement(List<Projection> projections, List<Table<?>> tables, List<Join> joins, Subquery subqueryFrom, List<Predicate> predicates, List<Field> groups, List<Order> orders, boolean distinct, Long limit, Long offset, boolean forUpdate) {
        this.projections = asList(projections);
        this.tables = asList(tables);
        this.joins = asList(joins);
        this.subqueryFrom = subqueryFrom;
        this.predicates = asList(predicates);
        this.groups = asList(groups);
        this.orders = asList(orders);
        this.distinct = distinct;
        this.limit = limit;
        this.offset = offset;
        this.forUpdate = forUpdate;
    }

    public SelectStatement join(Join... joins) {
        requireNonEmpty(joins, "No joins specified");
        require(() -> isNull(subqueryFrom), "Can't combine a subquery FROM clause with joins");

        List<Join> concatenated = concat(this.joins, joins);
        return new SelectStatement(projections, tables, concatenated, subqueryFrom, predicates, groups, orders, distinct, limit, offset, forUpdate);
    }

    public SelectStatement leftOuterJoin(Join join) {
        requireNonNull(join, "No join specified");
        return join(join.leftOuter());
    }

    public SelectStatement rightOuterJoin(Join join) {
        requireNonNull(join, "No join specified");
        return join(join.rightOuter());
    }

    @SafeVarargs
    public final SelectStatement joinIf(boolean condition, Supplier<Join>... joinSuppliers) {
        requireNonEmpty(joinSuppliers, "No join suppliers specified");
        require(() -> isNull(subqueryFrom), "Can't combine a subquery FROM clause with joins");
        if (condition) {
            List<Join> concatenated = concat(this.joins, unwrapSuppliers(joinSuppliers));
            return new SelectStatement(projections, tables, concatenated, subqueryFrom, predicates, groups, orders, distinct, limit, offset, forUpdate);
        } else {
            return this;
        }
    }

    /**
     * Adds one or more predicates to the where clause.
     * @param predicates the predicates to add
     * @return updated statement, for method chaining
     */
    public SelectStatement where(Predicate... predicates) {
        requireNonEmpty(predicates, "No predicates specified");

        List<Predicate> concatenated = concat(this.predicates, predicates);
        return new SelectStatement(projections, tables, joins, subqueryFrom, concatenated, groups, orders, distinct, limit, offset, forUpdate);
    }

    /**
     * Same as other method of same name, but only adds to the where clause predicates that are present.
     * @param maybePredicates the predicate that may be present or not
     * @return updated statement, for method chaining
     */
    @SafeVarargs
    public final SelectStatement where(OptionalPredicate... maybePredicates) {
        requireNonEmpty(maybePredicates, "No optional predicates specified");

        List<Predicate> concatenated = concat(this.predicates, OptionalPredicate.unwrap(maybePredicates));
        return new SelectStatement(projections, tables, joins, subqueryFrom, concatenated, groups, orders, distinct, limit, offset, forUpdate);
    }

    /**
     * Adds one or more predicates to the where clause, if a predicate is true.
     * @param condition the condition that must be true for predicates to be added
     * @param predicateSuppliers the suppliers providing predicates to add
     * @return updatet statement, for method chaining
     */
    @SafeVarargs
    public final SelectStatement whereIf(boolean condition, Supplier<Predicate>... predicateSuppliers) {
        requireNonEmpty(predicateSuppliers, "No predicate suppliers specified");
        if (condition) {
            List<Predicate> concatenated = concat(this.predicates, unwrapSuppliers(predicateSuppliers));
            return new SelectStatement(projections, tables, joins, subqueryFrom, concatenated, groups, orders, distinct, limit, offset, forUpdate);
        } else {
            return this;
        }
    }

    public SelectStatement groupBy(Field... groups) {
        requireNonEmpty(groups, "No groups specified");

        List<Field> concatenated = concat(this.groups, groups);
        return new SelectStatement(projections, tables, joins, subqueryFrom, predicates, concatenated, orders, distinct, limit, offset, forUpdate);
    }

    public SelectStatement orderBy(Order... orders) {
        requireNonEmpty(orders, "No orders specified");

        List<Order> concatenated = concat(this.orders, orders);
        return new SelectStatement(projections, tables, joins, subqueryFrom, predicates, groups, concatenated, distinct, limit, offset, forUpdate);
    }

    public SelectStatement limit(long limit) {
        return new SelectStatement(projections, tables, joins, subqueryFrom, predicates, groups, orders, distinct, limit, offset, forUpdate);
    }

    public SelectStatement offset(long offset) {
        return new SelectStatement(projections, tables, joins, subqueryFrom, predicates, groups, orders, distinct, limit, offset, forUpdate);
    }

    public SelectStatement forUpdate() {
        return new SelectStatement(projections, tables, joins, subqueryFrom, predicates, groups, orders, distinct, limit, offset, forUpdate);
    }

    @Override
    public String sql(Context context) {
        final Context localContext = context.withCommand(SELECT);
        validate();

        StringBuilder sb = new StringBuilder();
        sb.append("select ");
        if (distinct) {
            sb.append("distinct ");
        }

        sb.append(streamSafely(projections)
            .map(p -> p.sql(localContext) + (isBlank(p.alias()) ? "" : " " + p.alias()))
            .collect(joining(", ")));

        sb.append(" from ");

        if (nonNull(subqueryFrom)) {
            sb.append(subqueryFrom.sql(context));
            if (nonBlank(subqueryFrom.alias())) {
                sb.append(" ");
                sb.append(subqueryFrom.alias());
            }
        } else {
            // Tables that are joined with should not be specified in the FROM clause
            Set<Table<?>> joinedTables = streamSafely(joins).map(Join::joined).collect(toSet());

            sb.append(streamSafely(tables)
                .filter(not(joinedTables::contains))
                .map(t -> t.sql(localContext))
                .collect(joining(", ")));

            if (nonEmpty(joins)) {
                sb.append(" ");
                sb.append(streamSafely(joins)
                    .map(j -> j.sql(localContext))
                    .collect(joining(" ")));
            }
        }

        if (nonEmpty(predicates)) {
            sb.append(" where ");
            sb.append(streamSafely(predicates)
                .map(e -> e.sql(localContext))
                .collect(joining(" and ")));
        }

        if (nonEmpty(groups)) {
            sb.append(" group by ");
            sb.append(streamSafely(groups)
                .map(g -> g.sql(localContext))
                .collect(joining(", ")));
        }

        if (nonEmpty(orders)) {
            sb.append(" order by ");
            sb.append(streamSafely(orders)
                .map(o -> o.sql(localContext))
                .collect(joining(", ")));
        }

        if (nonNull(offset) || nonNull(limit)) {
            if (context.getDialect().supports(LIMIT_OFFSET)) {
                String offsetClause = nonNull(offset) ? " " + context.getDialect().formatRowOffsetClause().orElseThrow(() -> new RuntimeException("Dialect " + context.getDialect().getProductName() + " has no row offset clause")) : "";
                String limitClause = nonNull(limit) ? " " + context.getDialect().formatRowLimitClause().orElseThrow(() -> new RuntimeException("Dialect " + context.getDialect().getProductName() + " has no row limit clause")) : "";

                if (context.getDialect().offsetBeforeLimit()) {
                    sb.append(offsetClause).append(limitClause);
                } else {
                    sb.append(limitClause).append(offsetClause);
                }
            } else {
                sb = addLimitOffsetFallback(context, sb, rowFrom(), rowTo());
            }
        }

        if (forUpdate) {
            sb.append(" for update");
        }

        return sb.toString();
    }

    private Long rowFrom() {
        return mapIfNonNull(offset, o -> o + 1);
    }

    private Long rowTo() {
        return mapIfNonNull(limit, l -> (nonNull(offset) ? offset : 0) + l);
    }

    private StringBuilder addLimitOffsetFallback(Context context, StringBuilder innerSql, Long rowFrom, Long rowTo) {
        String rowNum = context.getDialect().formatRowNumLiteral()
            .orElseThrow(() -> new RuntimeException("Dialect " + context.getDialect().getProductName() + " has no ROWNUM literal"));

        if (nonNull(rowFrom) && nonNull(rowTo)) {
            String limitSql = "select ORIGINAL.*, {ROWNUM} ROW_NO from ( " + innerSql.toString() + " ) ORIGINAL where {ROWNUM} <= ?";
            String offsetSql = "select * from ( " + limitSql + " ) where ROW_NO >= ?";
            return new StringBuilder(offsetSql.replace("{ROWNUM}", rowNum));
        } else if (nonNull(rowFrom)) {
            String offsetSql = "select * from ( " + innerSql.toString() + " ) where {ROWNUM} >= ?";
            return new StringBuilder(offsetSql.replace("{ROWNUM}", rowNum));
        } else if (nonNull(rowTo)) {
            String limitSql = "select * from ( " + innerSql.toString() + " ) where {ROWNUM} <= ?";
            return new StringBuilder(limitSql.replace("{ROWNUM}", rowNum));
        }

        return innerSql;
    }

    @Override
    public List<Object> params(Context context) {
        List<Object> params = new LinkedList<>();

        streamSafely(projections).flatMap(p -> p.params(context)).forEach(params::add);

        if (nonNull(subqueryFrom)) {
            subqueryFrom.params(context).forEach(params::add);
        }

        streamSafely(predicates).flatMap(e -> e.params(context)).forEach(params::add);

        if (context.getDialect().supports(LIMIT_OFFSET)) {
            if (context.getDialect().offsetBeforeLimit()) {
                if (nonNull(offset)) {
                    params.add(offset);
                }
                if (nonNull(limit)) {
                    params.add(limit);
                }
            } else {
                if (nonNull(limit)) {
                    params.add(limit);
                }
                if (nonNull(offset)) {
                    params.add(offset);
                }
            }
        } else {
            if (nonNull(limit)) {
                params.add(rowTo());
            }
            if (nonNull(offset)) {
                params.add(rowFrom());
            }
        }

        return params;
    }

    private void validate() {
        if (isEmpty(tables) && isNull(subqueryFrom)) {
            throw new IllegalStateException("No FROM clause specified");
        }

        List<Field> projectedFields = streamSafely(projections)
            .filter(instanceOf(Expression.class))
            .map(castTo(Expression.class))
            .flatMap(Expression::fieldRefs)
            .toList();
        validateFieldTableRelations(streamSafely(projectedFields));

        if (nonNull(joins)) {
            validateFieldTableRelations(streamSafely(joins).flatMap(Join::fieldRefs));
        }

        validateFieldTableRelations(streamSafely(predicates).flatMap(Predicate::fieldRefs));
        validateFieldTableRelations(streamSafely(groups));
        validateFieldTableRelations(streamSafely(orders).flatMap(Order::fieldRefs));

        if (forUpdate) {
            if (distinct || nonEmpty(groups) || streamSafely(projections).anyMatch(instanceOf(AggregateFunction.class))) {
                throw new IllegalStateException("SELECT ... FOR UPDATE can't be used with DISTINCT, GROUP BY or aggregates");
            }
        }
    }

    private void validateFieldTableRelations(Stream<Field> fields) {
        Set<String> tableNames = Stream.concat(streamSafely(tables), streamSafely(joins).map(Join::joined))
            .map(Table::name)
            .collect(toSet());

        fields
            .filter(f -> !tableNames.contains(f.table().name()))
            .findFirst()
            .ifPresent(f -> {
                throw new IllegalStateException("Field " + f.name() + " belongs to table " + f.table().name() + ", but is not specified in a FROM or JOIN clause");
            });
    }
}

1	/*
2	* Copyright (c) 2024 Tore Eide Andersen
3	*
4	* Licensed under the Apache License, Version 2.0 (the "License");
5	* you may not use this file except in compliance with the License.
6	* You may obtain a copy of the License at
7	*
8	* http://www.apache.org/licenses/LICENSE-2.0
9	*
10	* Unless required by applicable law or agreed to in writing, software
11	* distributed under the License is distributed on an "AS IS" BASIS,
12	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13	* See the License for the specific language governing permissions and
14	* limitations under the License.
15	*/
16	package io.github.torand.fastersql.statement;
17
18	import io.github.torand.fastersql.Context;
19	import io.github.torand.fastersql.Field;
20	import io.github.torand.fastersql.Join;
21	import io.github.torand.fastersql.Table;
22	import io.github.torand.fastersql.expression.Expression;
23	import io.github.torand.fastersql.function.aggregate.AggregateFunction;
24	import io.github.torand.fastersql.order.Order;
25	import io.github.torand.fastersql.predicate.OptionalPredicate;
26	import io.github.torand.fastersql.predicate.Predicate;
27	import io.github.torand.fastersql.projection.Projection;
28	import io.github.torand.fastersql.subquery.Subquery;
29
30	import java.util.LinkedList;
31	import java.util.List;
32	import java.util.Set;
33	import java.util.function.Supplier;
34	import java.util.stream.Stream;
35
36	import static io.github.torand.fastersql.Command.SELECT;
37	import static io.github.torand.fastersql.dialect.Capability.LIMIT_OFFSET;
38	import static io.github.torand.fastersql.statement.Helpers.unwrapSuppliers;
39	import static io.github.torand.fastersql.util.collection.CollectionHelper.asList;
40	import static io.github.torand.fastersql.util.collection.CollectionHelper.concat;
41	import static io.github.torand.fastersql.util.collection.CollectionHelper.isEmpty;
42	import static io.github.torand.fastersql.util.collection.CollectionHelper.nonEmpty;
43	import static io.github.torand.fastersql.util.collection.CollectionHelper.streamSafely;
44	import static io.github.torand.fastersql.util.contract.Requires.require;
45	import static io.github.torand.fastersql.util.contract.Requires.requireNonEmpty;
46	import static io.github.torand.fastersql.util.functional.Functions.castTo;
47	import static io.github.torand.fastersql.util.functional.Optionals.mapIfNonNull;
48	import static io.github.torand.fastersql.util.functional.Predicates.instanceOf;
49	import static io.github.torand.fastersql.util.functional.Predicates.not;
50	import static io.github.torand.fastersql.util.lang.StringHelper.isBlank;
51	import static io.github.torand.fastersql.util.lang.StringHelper.nonBlank;
52	import static java.util.Objects.isNull;
53	import static java.util.Objects.nonNull;
54	import static java.util.Objects.requireNonNull;
55	import static java.util.stream.Collectors.joining;
56	import static java.util.stream.Collectors.toSet;
57
58	public class SelectStatement extends PreparableStatement {
59	private final List<Projection> projections;
60	private final List<Table<?>> tables;
61	private final List<Join> joins;
62	private final Subquery subqueryFrom;
63	private final List<Predicate> predicates;
64	private final List<Field> groups;
65	private final List<Order> orders;
66	private final boolean distinct;
67	private final Long limit;
68	private final Long offset;
69	private final boolean forUpdate;
70
71	SelectStatement(List<Projection> projections, List<Table<?>> tables, List<Join> joins, Subquery subqueryFrom, List<Predicate> predicates, List<Field> groups, List<Order> orders, boolean distinct, Long limit, Long offset, boolean forUpdate) {	2✔
72	this.projections = asList(projections);	4✔
73	this.tables = asList(tables);	4✔
74	this.joins = asList(joins);	4✔
75	this.subqueryFrom = subqueryFrom;	3✔
76	this.predicates = asList(predicates);	4✔
77	this.groups = asList(groups);	4✔
78	this.orders = asList(orders);	4✔
79	this.distinct = distinct;	3✔
80	this.limit = limit;	3✔
81	this.offset = offset;	3✔
82	this.forUpdate = forUpdate;	3✔
83	}	1✔
84
85	public SelectStatement join(Join... joins) {
86	requireNonEmpty(joins, "No joins specified");	6✔
87	require(() -> isNull(subqueryFrom), "Can't combine a subquery FROM clause with joins");	10✔
88
89	List<Join> concatenated = concat(this.joins, joins);	5✔
90	return new SelectStatement(projections, tables, concatenated, subqueryFrom, predicates, groups, orders, distinct, limit, offset, forUpdate);	25✔
91	}
92
93	public SelectStatement leftOuterJoin(Join join) {
94	requireNonNull(join, "No join specified");	×
95	return join(join.leftOuter());	×
96	}
97
98	public SelectStatement rightOuterJoin(Join join) {
99	requireNonNull(join, "No join specified");	×
100	return join(join.rightOuter());	×
101	}
102
103	@SafeVarargs
104	public final SelectStatement joinIf(boolean condition, Supplier<Join>... joinSuppliers) {
105	requireNonEmpty(joinSuppliers, "No join suppliers specified");	×
106	require(() -> isNull(subqueryFrom), "Can't combine a subquery FROM clause with joins");	×
107	if (condition) {	×
108	List<Join> concatenated = concat(this.joins, unwrapSuppliers(joinSuppliers));	×
109	return new SelectStatement(projections, tables, concatenated, subqueryFrom, predicates, groups, orders, distinct, limit, offset, forUpdate);	×
110	} else {
111	return this;	×
112	}
113	}
114
115	/**
116	* Adds one or more predicates to the where clause.
117	* @param predicates the predicates to add
118	* @return updated statement, for method chaining
119	*/
120	public SelectStatement where(Predicate... predicates) {
121	requireNonEmpty(predicates, "No predicates specified");	6✔
122
123	List<Predicate> concatenated = concat(this.predicates, predicates);	5✔
124	return new SelectStatement(projections, tables, joins, subqueryFrom, concatenated, groups, orders, distinct, limit, offset, forUpdate);	25✔
125	}
126
127	/**
128	* Same as other method of same name, but only adds to the where clause predicates that are present.
129	* @param maybePredicates the predicate that may be present or not
130	* @return updated statement, for method chaining
131	*/
132	@SafeVarargs
133	public final SelectStatement where(OptionalPredicate... maybePredicates) {
134	requireNonEmpty(maybePredicates, "No optional predicates specified");	6✔
135
136	List<Predicate> concatenated = concat(this.predicates, OptionalPredicate.unwrap(maybePredicates));	6✔
137	return new SelectStatement(projections, tables, joins, subqueryFrom, concatenated, groups, orders, distinct, limit, offset, forUpdate);	25✔
138	}
139
140	/**
141	* Adds one or more predicates to the where clause, if a predicate is true.
142	* @param condition the condition that must be true for predicates to be added
143	* @param predicateSuppliers the suppliers providing predicates to add
144	* @return updatet statement, for method chaining
145	*/
146	@SafeVarargs
147	public final SelectStatement whereIf(boolean condition, Supplier<Predicate>... predicateSuppliers) {
148	requireNonEmpty(predicateSuppliers, "No predicate suppliers specified");	×
149	if (condition) {	×
150	List<Predicate> concatenated = concat(this.predicates, unwrapSuppliers(predicateSuppliers));	×
151	return new SelectStatement(projections, tables, joins, subqueryFrom, concatenated, groups, orders, distinct, limit, offset, forUpdate);	×
152	} else {
153	return this;	×
154	}
155	}
156
157	public SelectStatement groupBy(Field... groups) {
158	requireNonEmpty(groups, "No groups specified");	6✔
159
160	List<Field> concatenated = concat(this.groups, groups);	5✔
161	return new SelectStatement(projections, tables, joins, subqueryFrom, predicates, concatenated, orders, distinct, limit, offset, forUpdate);	25✔
162	}
163
164	public SelectStatement orderBy(Order... orders) {
165	requireNonEmpty(orders, "No orders specified");	6✔
166
167	List<Order> concatenated = concat(this.orders, orders);	5✔
168	return new SelectStatement(projections, tables, joins, subqueryFrom, predicates, groups, concatenated, distinct, limit, offset, forUpdate);	25✔
169	}
170
171	public SelectStatement limit(long limit) {
172	return new SelectStatement(projections, tables, joins, subqueryFrom, predicates, groups, orders, distinct, limit, offset, forUpdate);	26✔
173	}
174
175	public SelectStatement offset(long offset) {
176	return new SelectStatement(projections, tables, joins, subqueryFrom, predicates, groups, orders, distinct, limit, offset, forUpdate);	26✔
177	}
178
179	public SelectStatement forUpdate() {
180	return new SelectStatement(projections, tables, joins, subqueryFrom, predicates, groups, orders, distinct, limit, offset, forUpdate);	×
181	}
182
183	@Override
184	public String sql(Context context) {
185	final Context localContext = context.withCommand(SELECT);	4✔
186	validate();	2✔
187
188	StringBuilder sb = new StringBuilder();	4✔
189	sb.append("select ");	4✔
190	if (distinct) {	3!
191	sb.append("distinct ");	×
192	}
193
194	sb.append(streamSafely(projections)	8✔
195	.map(p -> p.sql(localContext) + (isBlank(p.alias()) ? "" : " " + p.alias()))	16✔
196	.collect(joining(", ")));	3✔
197
198	sb.append(" from ");	4✔
199
200	if (nonNull(subqueryFrom)) {	4✔
201	sb.append(subqueryFrom.sql(context));	7✔
202	if (nonBlank(subqueryFrom.alias())) {	5!
203	sb.append(" ");	4✔
204	sb.append(subqueryFrom.alias());	7✔
205	}
206	} else {
207	// Tables that are joined with should not be specified in the FROM clause
208	Set<Table<?>> joinedTables = streamSafely(joins).map(Join::joined).collect(toSet());	9✔
209
210	sb.append(streamSafely(tables)	8✔
211	.filter(not(joinedTables::contains))	7✔
212	.map(t -> t.sql(localContext))	6✔
213	.collect(joining(", ")));	3✔
214
215	if (nonEmpty(joins)) {	4✔
216	sb.append(" ");	4✔
217	sb.append(streamSafely(joins)	8✔
218	.map(j -> j.sql(localContext))	6✔
219	.collect(joining(" ")));	3✔
220	}
221	}
222
223	if (nonEmpty(predicates)) {	4✔
224	sb.append(" where ");	4✔
225	sb.append(streamSafely(predicates)	8✔
226	.map(e -> e.sql(localContext))	6✔
227	.collect(joining(" and ")));	3✔
228	}
229
230	if (nonEmpty(groups)) {	4✔
231	sb.append(" group by ");	4✔
232	sb.append(streamSafely(groups)	8✔
233	.map(g -> g.sql(localContext))	6✔
234	.collect(joining(", ")));	3✔
235	}
236
237	if (nonEmpty(orders)) {	4✔
238	sb.append(" order by ");	4✔
239	sb.append(streamSafely(orders)	8✔
240	.map(o -> o.sql(localContext))	6✔
241	.collect(joining(", ")));	3✔
242	}
243
244	if (nonNull(offset) \|\| nonNull(limit)) {	8!
245	if (context.getDialect().supports(LIMIT_OFFSET)) {	5✔
246	String offsetClause = nonNull(offset) ? " " + context.getDialect().formatRowOffsetClause().orElseThrow(() -> new RuntimeException("Dialect " + context.getDialect().getProductName() + " has no row offset clause")) : "";	14!
247	String limitClause = nonNull(limit) ? " " + context.getDialect().formatRowLimitClause().orElseThrow(() -> new RuntimeException("Dialect " + context.getDialect().getProductName() + " has no row limit clause")) : "";	14!
248
249	if (context.getDialect().offsetBeforeLimit()) {	4✔
250	sb.append(offsetClause).append(limitClause);	7✔
251	} else {
252	sb.append(limitClause).append(offsetClause);	6✔
253	}
254	} else {	1✔
255	sb = addLimitOffsetFallback(context, sb, rowFrom(), rowTo());	9✔
256	}
257	}
258
259	if (forUpdate) {	3!
260	sb.append(" for update");	×
261	}
262
263	return sb.toString();	3✔
264	}
265
266	private Long rowFrom() {
267	return mapIfNonNull(offset, o -> o + 1);	12✔
268	}
269
270	private Long rowTo() {
271	return mapIfNonNull(limit, l -> (nonNull(offset) ? offset : 0) + l);	20!
272	}
273
274	private StringBuilder addLimitOffsetFallback(Context context, StringBuilder innerSql, Long rowFrom, Long rowTo) {
275	String rowNum = context.getDialect().formatRowNumLiteral()	5✔
276	.orElseThrow(() -> new RuntimeException("Dialect " + context.getDialect().getProductName() + " has no ROWNUM literal"));	3✔
277
278	if (nonNull(rowFrom) && nonNull(rowTo)) {	6!
279	String limitSql = "select ORIGINAL.*, {ROWNUM} ROW_NO from ( " + innerSql.toString() + " ) ORIGINAL where {ROWNUM} <= ?";	4✔
280	String offsetSql = "select * from ( " + limitSql + " ) where ROW_NO >= ?";	3✔
281	return new StringBuilder(offsetSql.replace("{ROWNUM}", rowNum));	8✔
282	} else if (nonNull(rowFrom)) {	×
283	String offsetSql = "select * from ( " + innerSql.toString() + " ) where {ROWNUM} >= ?";	×
284	return new StringBuilder(offsetSql.replace("{ROWNUM}", rowNum));	×
285	} else if (nonNull(rowTo)) {	×
286	String limitSql = "select * from ( " + innerSql.toString() + " ) where {ROWNUM} <= ?";	×
287	return new StringBuilder(limitSql.replace("{ROWNUM}", rowNum));	×
288	}
289
290	return innerSql;	×
291	}
292
293	@Override
294	public List<Object> params(Context context) {
295	List<Object> params = new LinkedList<>();	4✔
296
297	streamSafely(projections).flatMap(p -> p.params(context)).forEach(params::add);	16✔
298
299	if (nonNull(subqueryFrom)) {	4✔
300	subqueryFrom.params(context).forEach(params::add);	10✔
301	}
302
303	streamSafely(predicates).flatMap(e -> e.params(context)).forEach(params::add);	16✔
304
305	if (context.getDialect().supports(LIMIT_OFFSET)) {	5✔
306	if (context.getDialect().offsetBeforeLimit()) {	4✔
307	if (nonNull(offset)) {	4✔
308	params.add(offset);	5✔
309	}
310	if (nonNull(limit)) {	4✔
311	params.add(limit);	6✔
312	}
313	} else {
314	if (nonNull(limit)) {	4✔
315	params.add(limit);	5✔
316	}
317	if (nonNull(offset)) {	4✔
318	params.add(offset);	6✔
319	}
320	}
321	} else {
322	if (nonNull(limit)) {	4!
323	params.add(rowTo());	5✔
324	}
325	if (nonNull(offset)) {	4!
326	params.add(rowFrom());	5✔
327	}
328	}
329
330	return params;	2✔
331	}
332
333	private void validate() {
334	if (isEmpty(tables) && isNull(subqueryFrom)) {	8!
335	throw new IllegalStateException("No FROM clause specified");	×
336	}
337
338	List<Field> projectedFields = streamSafely(projections)	4✔
339	.filter(instanceOf(Expression.class))	3✔
340	.map(castTo(Expression.class))	3✔
341	.flatMap(Expression::fieldRefs)	1✔
342	.toList();	2✔
343	validateFieldTableRelations(streamSafely(projectedFields));	4✔
344
345	if (nonNull(joins)) {	4!
346	validateFieldTableRelations(streamSafely(joins).flatMap(Join::fieldRefs));	7✔
347	}
348
349	validateFieldTableRelations(streamSafely(predicates).flatMap(Predicate::fieldRefs));	7✔
350	validateFieldTableRelations(streamSafely(groups));	5✔
351	validateFieldTableRelations(streamSafely(orders).flatMap(Order::fieldRefs));	7✔
352
353	if (forUpdate) {	3!
354	if (distinct \|\| nonEmpty(groups) \|\| streamSafely(projections).anyMatch(instanceOf(AggregateFunction.class))) {	×
355	throw new IllegalStateException("SELECT ... FOR UPDATE can't be used with DISTINCT, GROUP BY or aggregates");	×
356	}
357	}
358	}	1✔
359
360	private void validateFieldTableRelations(Stream<Field> fields) {
361	Set<String> tableNames = Stream.concat(streamSafely(tables), streamSafely(joins).map(Join::joined))	10✔
362	.map(Table::name)	1✔
363	.collect(toSet());	4✔
364
365	fields	3✔
366	.filter(f -> !tableNames.contains(f.table().name()))	9!
367	.findFirst()	2✔
368	.ifPresent(f -> {	1✔
369	throw new IllegalStateException("Field " + f.name() + " belongs to table " + f.table().name() + ", but is not specified in a FROM or JOIN clause");	×
370	});
371	}	1✔
372	}

torand / FasterSQL / 13389227868

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