mirror of
https://github.com/querydsl/querydsl.git
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87 lines
3.2 KiB
Java
87 lines
3.2 KiB
Java
/*
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* Copyright 2011, Mysema Ltd
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.mysema.query.sql;
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import com.mysema.query.types.Ops;
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/**
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* PostgresTemplates is an SQL dialect for PostgreSQL
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*
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* tested with PostgreSQL 8.4
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*
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* @author tiwe
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*
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*/
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public class PostgresTemplates extends SQLTemplates {
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public PostgresTemplates() {
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this('\\', false);
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}
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public PostgresTemplates(boolean quote) {
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this('\\', quote);
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}
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public PostgresTemplates(char escape, boolean quote) {
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super("\"", escape, quote);
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setDummyTable(null);
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// type mappings
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addClass2TypeMappings("numeric(3,0)", Byte.class);
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addClass2TypeMappings("double precision", Double.class);
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// String
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add(Ops.MATCHES, "{0} ~ {1}");
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add(Ops.INDEX_OF, "strpos({0},{1})-1");
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add(Ops.INDEX_OF_2ARGS, "strpos({0},{1})-1"); //FIXME
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add(Ops.StringOps.LOCATE, "strpos({1},{0})");
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add(Ops.StringOps.LOCATE2, "strpos(repeat('^',{2s}-1) || substr({1},{2s}),{0})");
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// like without escape
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if (escape == '\\') {
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add(Ops.LIKE, "{0} like {1}");
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add(Ops.ENDS_WITH, "{0} like {%1}");
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add(Ops.ENDS_WITH_IC, "{0l} like {%%1}");
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add(Ops.STARTS_WITH, "{0} like {1%}");
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add(Ops.STARTS_WITH_IC, "{0l} like {1%%}");
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add(Ops.STRING_CONTAINS, "{0} like {%1%}");
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add(Ops.STRING_CONTAINS_IC, "{0l} like {%%1%%}");
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}
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// Number
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add(Ops.MathOps.RANDOM, "random()");
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add(Ops.MathOps.LN, "ln({0})");
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add(Ops.MathOps.LOG, "log({1},{0})");
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add(Ops.MathOps.COSH, "(exp({0}) + exp({0} * -1)) / 2");
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add(Ops.MathOps.COTH, "(exp({0} * 2) + 1) / (exp({0} * 2) - 1)");
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add(Ops.MathOps.SINH, "(exp({0}) - exp({0} * -1)) / 2");
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add(Ops.MathOps.TANH, "(exp({0} * 2) - 1) / (exp({0} * 2) + 1)");
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// Date / time
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add(Ops.DateTimeOps.YEAR, "extract(year from {0})");
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add(Ops.DateTimeOps.YEAR_MONTH, "extract(year from {0}) * 100 + extract(month from {0})");
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add(Ops.DateTimeOps.MONTH, "extract(month from {0})");
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add(Ops.DateTimeOps.WEEK, "extract(week from {0})");
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add(Ops.DateTimeOps.DAY_OF_MONTH, "extract(day from {0})");
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add(Ops.DateTimeOps.DAY_OF_WEEK, "extract(dow from {0}) + 1");
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add(Ops.DateTimeOps.DAY_OF_YEAR, "extract(doy from {0})");
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add(Ops.DateTimeOps.HOUR, "extract(hour from {0})");
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add(Ops.DateTimeOps.MINUTE, "extract(minute from {0})");
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add(Ops.DateTimeOps.SECOND, "extract(second from {0})");
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// add(Ops.DateTimeOps.DATE_ADD, "timestamp {0} + interval '{1s} {2s}s'");
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}
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}
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