12970217277

Committed 26 Jan 2025 01:31AM UTC coverage: 49.458%. Remained the same

Build # 12970217277

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torand

Commit Message

refactor: condition -> predicate

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58 of 137 new or added lines in 12 files covered. (42.34%)

3 existing lines in 2 files now uncovered.

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

torand / FasterSQL / 12970217277

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