14972998308

Committed 12 May 2025 01:04PM UTC coverage: 67.475% (+0.3%) from 67.194%

Build # 14972998308

Build Type

Pull #27

github

Committed by

web-flow

Commit Message

Merge d0df0a4c0 into 1f1b3df71

Pull Request Pull Request #27: feat: add support for SQL Server dialect

Coverage Stats

219 of 418 branches covered (52.39%)

Branch coverage included in aggregate %.

51 of 64 new or added lines in 13 files covered. (79.69%)

1144 of 1602 relevant lines covered (71.41%)

3.81 hits per line

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76.19

/src/main/java/io/github/torand/fastersql/dialect/SqlServerDialect.java

/*
 * Copyright (c) 2024-2025 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.dialect;

import java.util.EnumSet;
import java.util.List;
import java.util.Optional;

import static io.github.torand.fastersql.dialect.Capability.CONCAT_OPERATOR;
import static io.github.torand.fastersql.dialect.Capability.LIMIT_OFFSET;
import static io.github.torand.fastersql.dialect.Capability.MODULO_OPERATOR;

/**
 * Defines the SQL Server dialect.
 *
 * <a href="https://learn.microsoft.com/en-us/sql/sql-server/?view=sql-server-ver16" />
 */
public class SqlServerDialect implements Dialect {
    private final EnumSet<Capability> supportedCaps;

    public SqlServerDialect() {
        this(EnumSet.of(LIMIT_OFFSET, CONCAT_OPERATOR, MODULO_OPERATOR));
    }

    private SqlServerDialect(EnumSet<Capability> capabilities) {
        this.supportedCaps = EnumSet.copyOf(capabilities);
    }

    @Override
    public String getProductName() {
        return "SQL Server";
    }

    @Override
    public boolean offsetBeforeLimit() {
        return true;
    }

    /**
     * Row offset clause is supported from SQL Server 2012 onwards
     */
    @Override
    public Optional<String> formatRowOffsetClause() {
        return Optional.of("offset ? rows");
    }

    /**
     * Row limit clause is supported from SQL Server 2012 onwards
     */
    @Override
    public Optional<String> formatRowLimitClause() {
        return Optional.of("fetch next ? rows only");
    }

    /**
     * SQL Server has the ROW_NUMBER() function but must be combined with OVER() in this context.
     */
    @Override
    public Optional<String> formatRowNumLiteral() {
        return Optional.empty();
    }

    @Override
    public String formatToNumberFunction(String operand, int precision, int scale) {
        return "cast(" + operand + " as numeric(" + precision + "," + scale + "))";
    }

    @Override
    public String formatToCharFunction(String operand, String format) {
        throw new UnsupportedOperationException("SQL Server does not support the to_char() function");
    }

    @Override
    public String formatSubstringFunction(String operand, int startPos, int length) {
        return "substring(" + operand + ", " + startPos + ", " + length + ")";
    }

    @Override
    public String formatConcatFunction(List<String> operands) {
        throw new UnsupportedOperationException("SQL Server does not support the concat() function (use the concat infix operator instead)");
    }

    @Override
    public String formatLengthFunction(String operand) {
        return "len(" + operand + ")";
    }

    @Override
    public String formatCeilFunction(String operand) {
        return "ceiling(" + operand + ")";
    }

    @Override
    public String formatRoundFunction(String operand) {
        return "round(" + operand + ", 0)";
    }

    @Override
    public String formatModuloFunction(String divisor, String dividend) {
        throw new UnsupportedOperationException("SQL Server does not support the mod() function (use the modulo infix operator instead)");
    }

    @Override
    public String formatCurrentDateFunction() {
        return "getdate()";
    }

    @Override
    public Optional<String> getConcatOperator() {
        return Optional.of("+");
    }

    @Override
    public boolean supports(Capability capability) {
        return supportedCaps.contains(capability);
    }
}

1	/*
2	* Copyright (c) 2024-2025 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.dialect;
17
18	import java.util.EnumSet;
19	import java.util.List;
20	import java.util.Optional;
21
22	import static io.github.torand.fastersql.dialect.Capability.CONCAT_OPERATOR;
23	import static io.github.torand.fastersql.dialect.Capability.LIMIT_OFFSET;
24	import static io.github.torand.fastersql.dialect.Capability.MODULO_OPERATOR;
25
26	/**
27	* Defines the SQL Server dialect.
28	*
29	* <a href="https://learn.microsoft.com/en-us/sql/sql-server/?view=sql-server-ver16" />
30	*/
31	public class SqlServerDialect implements Dialect {
32	private final EnumSet<Capability> supportedCaps;
33
34	public SqlServerDialect() {
35	this(EnumSet.of(LIMIT_OFFSET, CONCAT_OPERATOR, MODULO_OPERATOR));	6✔
36	}	1✔
37
38	private SqlServerDialect(EnumSet<Capability> capabilities) {	2✔
39	this.supportedCaps = EnumSet.copyOf(capabilities);	4✔
40	}	1✔
41
42	@Override
43	public String getProductName() {
44	return "SQL Server";	2✔
45	}
46
47	@Override
48	public boolean offsetBeforeLimit() {
49	return true;	2✔
50	}
51
52	/**
53	* Row offset clause is supported from SQL Server 2012 onwards
54	*/
55	@Override
56	public Optional<String> formatRowOffsetClause() {
57	return Optional.of("offset ? rows");	3✔
58	}
59
60	/**
61	* Row limit clause is supported from SQL Server 2012 onwards
62	*/
63	@Override
64	public Optional<String> formatRowLimitClause() {
65	return Optional.of("fetch next ? rows only");	3✔
66	}
67
68	/**
69	* SQL Server has the ROW_NUMBER() function but must be combined with OVER() in this context.
70	*/
71	@Override
72	public Optional<String> formatRowNumLiteral() {
NEW 73	return Optional.empty();	×
74	}
75
76	@Override
77	public String formatToNumberFunction(String operand, int precision, int scale) {
NEW 78	return "cast(" + operand + " as numeric(" + precision + "," + scale + "))";	×
79	}
80
81	@Override
82	public String formatToCharFunction(String operand, String format) {
NEW 83	throw new UnsupportedOperationException("SQL Server does not support the to_char() function");	×
84	}
85
86	@Override
87	public String formatSubstringFunction(String operand, int startPos, int length) {
88	return "substring(" + operand + ", " + startPos + ", " + length + ")";	5✔
89	}
90
91	@Override
92	public String formatConcatFunction(List<String> operands) {
NEW 93	throw new UnsupportedOperationException("SQL Server does not support the concat() function (use the concat infix operator instead)");	×
94	}
95
96	@Override
97	public String formatLengthFunction(String operand) {
98	return "len(" + operand + ")";	3✔
99	}
100
101	@Override
102	public String formatCeilFunction(String operand) {
103	return "ceiling(" + operand + ")";	3✔
104	}
105
106	@Override
107	public String formatRoundFunction(String operand) {
108	return "round(" + operand + ", 0)";	3✔
109	}
110
111	@Override
112	public String formatModuloFunction(String divisor, String dividend) {
NEW 113	throw new UnsupportedOperationException("SQL Server does not support the mod() function (use the modulo infix operator instead)");	×
114	}
115
116	@Override
117	public String formatCurrentDateFunction() {
118	return "getdate()";	2✔
119	}
120
121	@Override
122	public Optional<String> getConcatOperator() {
123	return Optional.of("+");	3✔
124	}
125
126	@Override
127	public boolean supports(Capability capability) {
128	return supportedCaps.contains(capability);	5✔
129	}
130	}

torand / FasterSQL / 14972998308

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