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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42.86

/src/main/java/io/github/torand/fastersql/dialect/PostgreSqlDialect.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.CURRENT_TIME;
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.NULL_ORDERING;
import static io.github.torand.fastersql.dialect.Capability.SELECT_FOR_UPDATE;
import static io.github.torand.fastersql.dialect.Capability.SET_OPERATION_PARENTHESES;
import static io.github.torand.fastersql.dialect.Capability.TRUNCATE_TABLE;
import static io.github.torand.javacommons.lang.StringHelper.generate;

/**
 * Defines the <a href="https://www.postgresql.org/docs/current/">PostgreSQL</a> SQL dialect
 */
public class PostgreSqlDialect implements Dialect {
    private static final EnumSet<Capability> SUPPORTED_CAPS = EnumSet.of(LIMIT_OFFSET, CONCAT_OPERATOR, MODULO_OPERATOR, CURRENT_TIME, NULL_ORDERING, SELECT_FOR_UPDATE, TRUNCATE_TABLE, FULL_OUTER_JOIN, SET_OPERATION_PARENTHESES);

    /**
     * Creates a PostgreSQL {@link Dialect} implementation.
     */
    public PostgreSqlDialect() {}

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

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

    @Override
    public Optional<String> formatRowOffsetClause() {
        return Optional.of("offset ?");
    }

    @Override
    public Optional<String> formatRowLimitClause() {
        return Optional.of("limit ?");
    }

    @Override
    public Optional<String> formatRowNumLiteral() {
        return Optional.empty();
    }

    @Override
    public String formatToNumberFunction(String operand, int precision, int scale) {
        StringBuilder mask = new StringBuilder();
        if (precision-scale > 0) {
            mask.append(generate("9", precision-scale));
        }
        if (scale > 0) {
            mask.append(".").append(generate("9", scale));
        }

        return "to_number(" + operand + ", '" + mask + "')";
    }

    @Override
    public String formatToCharFunction(String operand, String format) {
        return "to_char(" + operand + ", " + format + ")";
    }

    @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("PostgreSQL does not support the concat() function (use the concat infix operator instead)");
    }

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

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

    @Override
    public String formatLnFunction(String operand) {
        return "ln(" + operand + ")";
    }

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

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

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

    @Override
    public Optional<String> getDataType(DataType dataType) {
        // https://www.postgresql.org/docs/current/datatype.html
        return Optional.ofNullable(switch(dataType.getIsoDataType()) {
            case BOOLEAN -> "boolean";
            case CHAR -> "char";
            case VARCHAR -> "varchar";
            case BIT -> "bit";
            case BIT_VARYING -> "bit varying";
            case NUMERIC -> "numeric";
            case DECIMAL -> "decimal";
            case INTEGER -> "integer";
            case SMALLINT -> "smallint";
            case FLOAT -> null;
            case DOUBLE_PRECISION -> "double precision";
            case REAL -> "real";
            case TIME -> "time";
            case DATE -> "date";
            case INTERVAL -> "interval";
            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 SUPPORTED_CAPS.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.CURRENT_TIME;
26	import static io.github.torand.fastersql.dialect.Capability.FULL_OUTER_JOIN;
27	import static io.github.torand.fastersql.dialect.Capability.LIMIT_OFFSET;
28	import static io.github.torand.fastersql.dialect.Capability.MODULO_OPERATOR;
29	import static io.github.torand.fastersql.dialect.Capability.NULL_ORDERING;
30	import static io.github.torand.fastersql.dialect.Capability.SELECT_FOR_UPDATE;
31	import static io.github.torand.fastersql.dialect.Capability.SET_OPERATION_PARENTHESES;
32	import static io.github.torand.fastersql.dialect.Capability.TRUNCATE_TABLE;
33	import static io.github.torand.javacommons.lang.StringHelper.generate;
34
35	/**
36	* Defines the <a href="https://www.postgresql.org/docs/current/">PostgreSQL</a> SQL dialect
37	*/
38	public class PostgreSqlDialect implements Dialect {
39	private static final EnumSet<Capability> SUPPORTED_CAPS = EnumSet.of(LIMIT_OFFSET, CONCAT_OPERATOR, MODULO_OPERATOR, CURRENT_TIME, NULL_ORDERING, SELECT_FOR_UPDATE, TRUNCATE_TABLE, FULL_OUTER_JOIN, SET_OPERATION_PARENTHESES);	38✔
40
41	/**
42	* Creates a PostgreSQL {@link Dialect} implementation.
43	*/
44	public PostgreSqlDialect() {}	3✔
45
46	@Override
47	public String getProductName() {
48	return "PostgreSQL";	2✔
49	}
50
51	@Override
52	public boolean offsetBeforeLimit() {
53	return true;	2✔
54	}
55
56	@Override
57	public Optional<String> formatRowOffsetClause() {
58	return Optional.of("offset ?");	3✔
59	}
60
61	@Override
62	public Optional<String> formatRowLimitClause() {
63	return Optional.of("limit ?");	3✔
64	}
65
66	@Override
67	public Optional<String> formatRowNumLiteral() {
68	return Optional.empty();	×
69	}
70
71	@Override
72	public String formatToNumberFunction(String operand, int precision, int scale) {
73	StringBuilder mask = new StringBuilder();	4✔
74	if (precision-scale > 0) {	4!
75	mask.append(generate("9", precision-scale));	8✔
76	}
77	if (scale > 0) {	2!
78	mask.append(".").append(generate("9", scale));	×
79	}
80
81	return "to_number(" + operand + ", '" + mask + "')";	5✔
82	}
83
84	@Override
85	public String formatToCharFunction(String operand, String format) {
86	return "to_char(" + operand + ", " + format + ")";	4✔
87	}
88
89	@Override
90	public String formatSubstringFunction(String operand, int startPos, int length) {
91	return "substring(" + operand + ", " + startPos + ", " + length + ")";	5✔
92	}
93
94	@Override
95	public String formatConcatFunction(List<String> operands) {
96	throw new UnsupportedOperationException("PostgreSQL does not support the concat() function (use the concat infix operator instead)");	×
97	}
98
99	@Override
100	public String formatLengthFunction(String operand) {
101	return "char_length(" + operand + ")";	3✔
102	}
103
104	@Override
105	public String formatCeilFunction(String operand) {
106	return "ceil(" + operand + ")";	3✔
107	}
108
109	@Override
110	public String formatLnFunction(String operand) {
111	return "ln(" + operand + ")";	3✔
112	}
113
114	@Override
115	public String formatRoundFunction(String operand) {
116	return "round(" + operand + ")";	3✔
117	}
118
119	@Override
120	public String formatModuloFunction(String divisor, String dividend) {
121	throw new UnsupportedOperationException("PostgreSQL does not support the mod() function (use the modulo infix operator instead)");	×
122	}
123
124	@Override
125	public String formatCurrentDateFunction() {
126	return "current_date";	2✔
127	}
128
129	@Override
130	public Optional<String> getDataType(DataType dataType) {
131	// https://www.postgresql.org/docs/current/datatype.html
132	return Optional.ofNullable(switch(dataType.getIsoDataType()) {	8!
133	case BOOLEAN -> "boolean";	×
134	case CHAR -> "char";	×
135	case VARCHAR -> "varchar";	2✔
136	case BIT -> "bit";	×
137	case BIT_VARYING -> "bit varying";	×
138	case NUMERIC -> "numeric";	×
139	case DECIMAL -> "decimal";	2✔
140	case INTEGER -> "integer";	×
141	case SMALLINT -> "smallint";	×
142	case FLOAT -> null;	×
143	case DOUBLE_PRECISION -> "double precision";	×
144	case REAL -> "real";	×
145	case TIME -> "time";	×
146	case DATE -> "date";	×
147	case INTERVAL -> "interval";	×
148	case CHARACTER_LARGE_OBJECT -> null;	×
149	case BINARY_LARGE_OBJECT -> null;	×
150	});
151	}
152
153	@Override
154	public Optional<String> getConcatOperator() {
155	return Optional.of("\|\|");	3✔
156	}
157
158	@Override
159	public boolean supports(Capability capability) {
160	return SUPPORTED_CAPS.contains(capability);	4✔
161	}
162	}

torand / FasterSQL / 16990059345

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