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107 lines
3.6 KiB
Java
107 lines
3.6 KiB
Java
/*
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* Copyright (c) 2010 Mysema Ltd.
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* All rights reserved.
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*
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*/
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package com.mysema.query.sql;
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import java.math.BigInteger;
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import com.mysema.query.QueryMetadata;
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import com.mysema.query.QueryModifiers;
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import com.mysema.query.types.Ops;
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/**
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* OracleTemplates is an SQL dialect for Oracle
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*
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* tested with Oracle 10g XE
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*
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* @author tiwe
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* @version $Id$
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*/
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public class OracleTemplates extends SQLTemplates {
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private String outerQueryEnd = "\n ) a) where ";
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private String outerQueryStart = "select * from (\n select a.*, rownum rn from (\n ";
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private String limitQueryEnd = "\n) where rownum <= {0}";
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private String limitQueryStart = "select * from (\n ";
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private String limitOffsetTemplate = "rn > {0s} and rn <= {1s}";
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private String offsetTemplate = "rn > {0}";
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public OracleTemplates(){
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this(false);
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}
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public OracleTemplates(boolean quote){
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super(quote ? "\"" : null);
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// type mappings
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addClass2TypeMappings("number(3,0)", Byte.class);
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addClass2TypeMappings("number(1,0)", Boolean.class);
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addClass2TypeMappings("number(19,0)", BigInteger.class, Long.class);
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addClass2TypeMappings("number(5,0)", Short.class);
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addClass2TypeMappings("number(10,0)", Integer.class);
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addClass2TypeMappings("double precision", Double.class);
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addClass2TypeMappings("varchar(4000 char)", String.class);
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add(Ops.ALIAS, "{0} {1}");
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// String
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add(Ops.CONCAT, "{0} || {1}");
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add(Ops.INDEX_OF, "instrb({0},{1})-1");
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add(Ops.INDEX_OF_2ARGS, "instrb({0},{1},{2}+1)-1");
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add(Ops.MATCHES, "regexp_like({0},{1})");
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add(Ops.StringOps.SPACE, "lpad('',{0},' ')");
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// Number
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add(Ops.MathOps.CEIL, "ceil({0})");
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add(Ops.MathOps.RANDOM, "dbms_random.value");
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add(Ops.MathOps.LOG, "ln({0})");
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add(Ops.MathOps.LOG10, "log(10,{0})");
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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, "to_number(to_char({0},'WW'))");
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add(Ops.DateTimeOps.DAY_OF_MONTH, "to_number(to_char({0},'DD'))");
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add(Ops.DateTimeOps.DAY_OF_WEEK, "to_number(to_char({0},'D')) + 1");
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add(Ops.DateTimeOps.DAY_OF_YEAR, "to_number(to_char({0},'DDD'))");
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add(Ops.DateTimeOps.HOUR, "to_number(to_char({0},'HH24'))");
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add(Ops.DateTimeOps.MINUTE, "to_number(to_char({0},'MI'))");
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add(Ops.DateTimeOps.SECOND, "to_number(to_char({0},'SS'))");
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}
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@Override
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public void serialize(QueryMetadata metadata, boolean forCountRow, SerializationContext context) {
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if (!forCountRow && metadata.getModifiers().isRestricting()){
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QueryModifiers mod = metadata.getModifiers();
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if (mod.getOffset() == null){
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context.append(limitQueryStart);
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context.serialize(metadata, forCountRow);
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context.handle(limitQueryEnd, mod.getLimit());
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}else{
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context.append(outerQueryStart);
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context.serialize(metadata, forCountRow);
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context.append(outerQueryEnd);
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if (mod.getLimit() == null){
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context.handle(offsetTemplate, mod.getOffset());
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}else{
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context.handle(limitOffsetTemplate, mod.getOffset(), mod.getLimit() + mod.getOffset());
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}
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}
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}else{
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context.serialize(metadata, forCountRow);
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}
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}
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}
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