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113 lines
3.8 KiB
Java
113 lines
3.8 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 com.mysema.query.QueryMetadata;
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import com.mysema.query.QueryModifiers;
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import com.mysema.query.sql.mssql.RowNumber;
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import com.mysema.query.sql.mssql.SQLServerGrammar;
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import com.mysema.query.sql.support.SerializationContext;
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import com.mysema.query.types.Ops;
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import com.mysema.query.types.OrderSpecifier;
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/**
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* SQLServerTemplates is an SQL dialect for Microsoft SQL Server
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*
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* tested with MS SQL Server 2008 Express
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*
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* @author tiwe
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*
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*/
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public class SQLServerTemplates extends SQLTemplates{
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private String limitOffsetTemplate = "row_number > {0} and row_number <= {1}";
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private String limitTemplate = "row_number <= {0}";
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private String offsetTemplate = "row_number > {0}";
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private String outerQueryStart = "with inner_query as \n(\n ";
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private String outerQueryEnd = "\n)\nselect * \nfrom inner_query\nwhere ";
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public SQLServerTemplates() {
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this('\\',false);
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}
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public SQLServerTemplates(boolean quote) {
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this('\\',quote);
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}
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public SQLServerTemplates(char escape, boolean quote) {
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super("\"", escape, quote);
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addClass2TypeMappings("decimal", Double.class);
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setDummyTable("");
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// String
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add(Ops.CHAR_AT, "cast(substring({0},{1}+1,1) as char)");
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add(Ops.INDEX_OF, "charindex({1},{0})-1");
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add(Ops.INDEX_OF_2ARGS, "charindex({1},{0},{2})-1");
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// NOTE : needs to be replaced with real regular expression
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add(Ops.MATCHES, "{0} like {1}");
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add(Ops.STRING_IS_EMPTY, "len({0}) = 0");
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add(Ops.STRING_LENGTH, "len({0})");
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add(Ops.SUBSTR_1ARG, "substring({0},{1}+1,255)");
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add(Ops.SUBSTR_2ARGS, "substring({0},{1}+1,{2})");
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add(Ops.TRIM, "ltrim(rtrim({0}))");
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add(NEXTVAL, "{0s}.nextval");
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// Date / time
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add(Ops.DateTimeOps.YEAR, "datepart(year, {0})");
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add(Ops.DateTimeOps.MONTH, "datepart(month, {0})");
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add(Ops.DateTimeOps.WEEK, "datepart(week, {0})");
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add(Ops.DateTimeOps.DAY_OF_MONTH, "datepart(day, {0})");
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add(Ops.DateTimeOps.DAY_OF_WEEK, "datepart(weekday, {0})");
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add(Ops.DateTimeOps.DAY_OF_YEAR, "datepart(dayofyear, {0})");
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add(Ops.DateTimeOps.HOUR, "datepart(hour, {0})");
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add(Ops.DateTimeOps.MINUTE, "datepart(minute, {0})");
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add(Ops.DateTimeOps.SECOND, "datepart(second, {0})");
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add(Ops.DateTimeOps.MILLISECOND, "datepart(millisecond, {0})");
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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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// TODO : provide simpler template for limit ?!?
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context.append(outerQueryStart);
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metadata = metadata.clone();
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RowNumber rn = new RowNumber();
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for (OrderSpecifier<?> os : metadata.getOrderBy()) {
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rn.orderBy(os);
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}
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metadata.addProjection(rn.as(SQLServerGrammar.rowNumber));
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metadata.clearOrderBy();
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context.serialize(metadata, forCountRow);
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context.append(outerQueryEnd);
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QueryModifiers mod = metadata.getModifiers();
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if (mod.getLimit() == null) {
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context.handle(offsetTemplate, mod.getOffset());
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} else if (mod.getOffset() == null) {
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context.handle(limitTemplate, mod.getLimit());
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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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} else {
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context.serialize(metadata, forCountRow);
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}
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}
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@Override
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protected void serializeModifiers(QueryMetadata metadata, SerializationContext context) {
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// do nothing
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}
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}
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