16990059345

Committed 15 Aug 2025 12:34PM UTC coverage: 66.782% (-6.6%) from 73.399%

Build # 16990059345

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push

github

Committed by

torand

Commit Message

chore: access central snapshots

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294 of 598 branches covered (49.16%)

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45.1

/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 io.github.torand.fastersql.function.singlerow.cast.DataType;

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

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

    /**
     * Creates a Microsoft SQL Server {@link Dialect} implementation.
     */
    public SqlServerDialect() {
        this(EnumSet.of(LIMIT_OFFSET, CONCAT_OPERATOR, MODULO_OPERATOR, TRUNCATE_TABLE, FULL_OUTER_JOIN));
    }

    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 formatLnFunction(String operand) {
        return "log(" + 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> getDataType(DataType dataType) {
        // https://learn.microsoft.com/en-us/office/client-developer/access/desktop-database-reference/equivalent-ansi-sql-data-types
        return Optional.ofNullable(switch(dataType.getIsoDataType()) {
            case BOOLEAN -> "bit";
            case CHAR -> "char";
            case VARCHAR -> "varchar";
            case BIT, BIT_VARYING -> "binary";
            case NUMERIC -> null;
            case DECIMAL -> "decimal";
            case INTEGER -> "integer";
            case SMALLINT -> "smallint";
            case FLOAT, DOUBLE_PRECISION -> "float";
            case REAL -> "real";
            case DATE, TIME -> "datetime";
            case INTERVAL -> null;
            case CHARACTER_LARGE_OBJECT -> null;
            case BINARY_LARGE_OBJECT -> null;
        });
    }

    @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 io.github.torand.fastersql.function.singlerow.cast.DataType;
19
20	import java.util.EnumSet;
21	import java.util.List;
22	import java.util.Optional;
23
24	import static io.github.torand.fastersql.dialect.Capability.CONCAT_OPERATOR;
25	import static io.github.torand.fastersql.dialect.Capability.FULL_OUTER_JOIN;
26	import static io.github.torand.fastersql.dialect.Capability.LIMIT_OFFSET;
27	import static io.github.torand.fastersql.dialect.Capability.MODULO_OPERATOR;
28	import static io.github.torand.fastersql.dialect.Capability.TRUNCATE_TABLE;
29
30	/**
31	* Defines the <a href="https://learn.microsoft.com/en-us/sql/sql-server/?view=sql-server-ver16">Microsoft SQL Server</a> SQL dialect.
32	*/
33	public class SqlServerDialect implements Dialect {
34	private final EnumSet<Capability> supportedCaps;
35
36	/**
37	* Creates a Microsoft SQL Server {@link Dialect} implementation.
38	*/
39	public SqlServerDialect() {
40	this(EnumSet.of(LIMIT_OFFSET, CONCAT_OPERATOR, MODULO_OPERATOR, TRUNCATE_TABLE, FULL_OUTER_JOIN));	8✔
41	}	1✔
42
43	private SqlServerDialect(EnumSet<Capability> capabilities) {	2✔
44	this.supportedCaps = EnumSet.copyOf(capabilities);	4✔
45	}	1✔
46
47	@Override
48	public String getProductName() {
49	return "SQL Server";	2✔
50	}
51
52	@Override
53	public boolean offsetBeforeLimit() {
54	return true;	2✔
55	}
56
57	/**
58	* Row offset clause is supported from SQL Server 2012 onwards
59	*/
60	@Override
61	public Optional<String> formatRowOffsetClause() {
62	return Optional.of("offset ? rows");	3✔
63	}
64
65	/**
66	* Row limit clause is supported from SQL Server 2012 onwards
67	*/
68	@Override
69	public Optional<String> formatRowLimitClause() {
70	return Optional.of("fetch next ? rows only");	3✔
71	}
72
73	/**
74	* SQL Server has the ROW_NUMBER() function but must be combined with OVER() in this context.
75	*/
76	@Override
77	public Optional<String> formatRowNumLiteral() {
78	return Optional.empty();	×
79	}
80
81	@Override
82	public String formatToNumberFunction(String operand, int precision, int scale) {
83	return "cast(" + operand + " as numeric(" + precision + "," + scale + "))";	5✔
84	}
85
86	@Override
87	public String formatToCharFunction(String operand, String format) {
88	throw new UnsupportedOperationException("SQL Server does not support the to_char() function");	×
89	}
90
91	@Override
92	public String formatSubstringFunction(String operand, int startPos, int length) {
93	return "substring(" + operand + ", " + startPos + ", " + length + ")";	5✔
94	}
95
96	@Override
97	public String formatConcatFunction(List<String> operands) {
98	throw new UnsupportedOperationException("SQL Server does not support the concat() function (use the concat infix operator instead)");	×
99	}
100
101	@Override
102	public String formatLengthFunction(String operand) {
103	return "len(" + operand + ")";	3✔
104	}
105
106	@Override
107	public String formatCeilFunction(String operand) {
108	return "ceiling(" + operand + ")";	3✔
109	}
110
111	@Override
112	public String formatLnFunction(String operand) {
113	return "log(" + operand + ")";	3✔
114	}
115
116	@Override
117	public String formatRoundFunction(String operand) {
118	return "round(" + operand + ", 0)";	3✔
119	}
120
121	@Override
122	public String formatModuloFunction(String divisor, String dividend) {
123	throw new UnsupportedOperationException("SQL Server does not support the mod() function (use the modulo infix operator instead)");	×
124	}
125
126	@Override
127	public String formatCurrentDateFunction() {
128	return "getdate()";	2✔
129	}
130
131	@Override
132	public Optional<String> getDataType(DataType dataType) {
133	// https://learn.microsoft.com/en-us/office/client-developer/access/desktop-database-reference/equivalent-ansi-sql-data-types
134	return Optional.ofNullable(switch(dataType.getIsoDataType()) {	8!
135	case BOOLEAN -> "bit";	×
136	case CHAR -> "char";	×
137	case VARCHAR -> "varchar";	2✔
138	case BIT, BIT_VARYING -> "binary";	×
139	case NUMERIC -> null;	×
140	case DECIMAL -> "decimal";	2✔
141	case INTEGER -> "integer";	×
142	case SMALLINT -> "smallint";	×
143	case FLOAT, DOUBLE_PRECISION -> "float";	×
144	case REAL -> "real";	×
145	case DATE, TIME -> "datetime";	×
146	case INTERVAL -> null;	×
147	case CHARACTER_LARGE_OBJECT -> null;	×
148	case BINARY_LARGE_OBJECT -> null;	×
149	});
150	}
151
152	@Override
153	public Optional<String> getConcatOperator() {
154	return Optional.of("+");	3✔
155	}
156
157	@Override
158	public boolean supports(Capability capability) {
159	return supportedCaps.contains(capability);	5✔
160	}
161	}

torand / FasterSQL / 16990059345

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