/*
* Copyright 1999-2011 Alibaba Group Holding Ltd.
*
* 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 com.alibaba.druid.sql.dialect.sqlserver.parser;
import java.util.List;
import com.alibaba.druid.sql.ast.SQLName;
import com.alibaba.druid.sql.ast.SQLStatement;
import com.alibaba.druid.sql.ast.expr.SQLQueryExpr;
import com.alibaba.druid.sql.ast.statement.SQLInsertInto;
import com.alibaba.druid.sql.ast.statement.SQLInsertStatement;
import com.alibaba.druid.sql.ast.statement.SQLTableSource;
import com.alibaba.druid.sql.ast.statement.SQLUpdateStatement;
import com.alibaba.druid.sql.dialect.sqlserver.ast.SQLServerTop;
import com.alibaba.druid.sql.dialect.sqlserver.ast.stmt.SQLServerExecStatement;
import com.alibaba.druid.sql.dialect.sqlserver.ast.stmt.SQLServerInsertStatement;
import com.alibaba.druid.sql.dialect.sqlserver.ast.stmt.SQLServerUpdateStatement;
import com.alibaba.druid.sql.parser.Lexer;
import com.alibaba.druid.sql.parser.SQLSelectParser;
import com.alibaba.druid.sql.parser.SQLStatementParser;
import com.alibaba.druid.sql.parser.Token;
public class SQLServerStatementParser extends SQLStatementParser {
public SQLServerStatementParser(String sql){
super(new SQLServerExprParser(sql));
}
public SQLSelectParser createSQLSelectParser() {
return new SQLServerSelectParser(this.exprParser);
}
public SQLServerStatementParser(Lexer lexer){
super(new SQLServerExprParser(lexer));
}
public boolean parseStatementListDialect(List<SQLStatement> statementList) {
if (lexer.token() == Token.WITH) {
SQLStatement stmt = parseSelect();
statementList.add(stmt);
return true;
}
if (identifierEquals("EXEC") || identifierEquals("EXECUTE")) {
lexer.nextToken();
SQLServerExecStatement execStmt = new SQLServerExecStatement();
if (lexer.token() == Token.LPAREN) {
lexer.nextToken();
this.exprParser.exprList(execStmt.getParameters(), execStmt);
accept(Token.RPAREN);
} else {
SQLName moduleName = this.exprParser.name();
execStmt.setModuleName(moduleName);
this.exprParser.exprList(execStmt.getParameters(), execStmt);
}
statementList.add(execStmt);
return true;
}
return false;
}
public SQLStatement parseInsert() {
SQLServerInsertStatement insertStatement = new SQLServerInsertStatement();
if (lexer.token() == Token.INSERT) {
accept(Token.INSERT);
}
parseInsert0(insertStatement);
return insertStatement;
}
protected void parseInsert0(SQLInsertInto insert, boolean acceptSubQuery) {
SQLServerInsertStatement insertStatement = (SQLServerInsertStatement) insert;
if (lexer.token() == Token.INTO) {
lexer.nextToken();
SQLName tableName = this.exprParser.name();
insertStatement.setTableName(tableName);
if (lexer.token() == Token.LITERAL_ALIAS) {
insertStatement.setAlias(as());
}
parseInsert0_hinits(insertStatement);
if (lexer.token() == Token.IDENTIFIER) {
insertStatement.setAlias(lexer.stringVal());
lexer.nextToken();
}
}
if (lexer.token() == (Token.LPAREN)) {
lexer.nextToken();
this.exprParser.exprList(insertStatement.getColumns(), insertStatement);
accept(Token.RPAREN);
}
if (lexer.token() == Token.VALUES) {
lexer.nextToken();
for (;;) {
accept(Token.LPAREN);
SQLInsertStatement.ValuesClause values = new SQLInsertStatement.ValuesClause();
this.exprParser.exprList(values.getValues(), values);
insertStatement.getValuesList().add(values);
accept(Token.RPAREN);
if (lexer.token() == Token.COMMA) {
lexer.nextToken();
continue;
} else {
break;
}
}
} else if (acceptSubQuery && (lexer.token() == Token.SELECT || lexer.token() == Token.LPAREN)) {
SQLQueryExpr queryExpr = (SQLQueryExpr) this.exprParser.expr();
insertStatement.setQuery(queryExpr.getSubQuery());
} else if (lexer.token() == Token.DEFAULT) {
lexer.nextToken();
accept(Token.VALUES);
insertStatement.setDefaultValues(true);
}
}
protected SQLServerUpdateStatement createUpdateStatement() {
return new SQLServerUpdateStatement();
}
public SQLUpdateStatement parseUpdateStatement() {
SQLServerUpdateStatement udpateStatement = createUpdateStatement();
accept(Token.UPDATE);
SQLServerTop top = this.getExprParser().parseTop();
if (top != null) {
udpateStatement.setTop(top);
}
SQLTableSource tableSource = this.exprParser.createSelectParser().parseTableSource();
udpateStatement.setTableSource(tableSource);
parseUpdateSet(udpateStatement);
if (lexer.token() == Token.FROM) {
lexer.nextToken();
SQLTableSource from = this.exprParser.createSelectParser().parseTableSource();
udpateStatement.setFrom(from);
}
if (lexer.token() == (Token.WHERE)) {
lexer.nextToken();
udpateStatement.setWhere(this.exprParser.expr());
}
return udpateStatement;
}
public SQLServerExprParser getExprParser() {
return (SQLServerExprParser) exprParser;
}
}