/*
* 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;
import java.util.ArrayList;
import java.util.List;
import com.alibaba.druid.DruidRuntimeException;
import com.alibaba.druid.sql.ast.SQLExpr;
import com.alibaba.druid.sql.ast.SQLObject;
import com.alibaba.druid.sql.ast.SQLStatement;
import com.alibaba.druid.sql.ast.expr.SQLBinaryOpExpr;
import com.alibaba.druid.sql.dialect.db2.visitor.DB2OutputVisitor;
import com.alibaba.druid.sql.dialect.db2.visitor.DB2SchemaStatVisitor;
import com.alibaba.druid.sql.dialect.mysql.visitor.MySqlOutputVisitor;
import com.alibaba.druid.sql.dialect.mysql.visitor.MySqlSchemaStatVisitor;
import com.alibaba.druid.sql.dialect.odps.visitor.OdpsOutputVisitor;
import com.alibaba.druid.sql.dialect.oracle.visitor.OracleOutputVisitor;
import com.alibaba.druid.sql.dialect.oracle.visitor.OracleSchemaStatVisitor;
import com.alibaba.druid.sql.dialect.postgresql.visitor.PGOutputVisitor;
import com.alibaba.druid.sql.dialect.postgresql.visitor.PGSchemaStatVisitor;
import com.alibaba.druid.sql.dialect.sqlserver.visitor.SQLServerOutputVisitor;
import com.alibaba.druid.sql.dialect.sqlserver.visitor.SQLServerSchemaStatVisitor;
import com.alibaba.druid.sql.parser.ParserException;
import com.alibaba.druid.sql.parser.SQLExprParser;
import com.alibaba.druid.sql.parser.SQLParserUtils;
import com.alibaba.druid.sql.parser.SQLStatementParser;
import com.alibaba.druid.sql.parser.Token;
import com.alibaba.druid.sql.visitor.SQLASTOutputVisitor;
import com.alibaba.druid.sql.visitor.SchemaStatVisitor;
import com.alibaba.druid.support.logging.Log;
import com.alibaba.druid.support.logging.LogFactory;
import com.alibaba.druid.util.JdbcConstants;
import com.alibaba.druid.util.JdbcUtils;
import com.alibaba.druid.util.StringUtils;
public class SQLUtils {
private final static Log LOG = LogFactory.getLog(SQLUtils.class);
public static String toSQLString(SQLObject sqlObject, String dbType) {
if (JdbcUtils.MYSQL.equals(dbType) || //
JdbcUtils.MARIADB.equals(dbType) || //
JdbcUtils.H2.equals(dbType)) {
return toMySqlString(sqlObject);
}
if (JdbcUtils.ORACLE.equals(dbType) || JdbcUtils.ALI_ORACLE.equals(dbType)) {
return toOracleString(sqlObject);
}
if (JdbcUtils.POSTGRESQL.equals(dbType)) {
return toPGString(sqlObject);
}
if (JdbcUtils.DB2.equals(dbType)) {
return toDB2String(sqlObject);
}
if (JdbcUtils.ODPS.equals(dbType)) {
return toDB2String(sqlObject);
}
return toSQLServerString(sqlObject);
}
public static String toSQLString(SQLObject sqlObject) {
StringBuilder out = new StringBuilder();
sqlObject.accept(new SQLASTOutputVisitor(out));
String sql = out.toString();
return sql;
}
public static String toOdpsString(SQLObject sqlObject) {
StringBuilder out = new StringBuilder();
sqlObject.accept(new OdpsOutputVisitor(out));
String sql = out.toString();
return sql;
}
public static String toMySqlString(SQLObject sqlObject) {
StringBuilder out = new StringBuilder();
sqlObject.accept(new MySqlOutputVisitor(out));
String sql = out.toString();
return sql;
}
public static SQLExpr toMySqlExpr(String sql) {
return toSQLExpr(sql, JdbcUtils.MYSQL);
}
public static String formatMySql(String sql) {
return format(sql, JdbcUtils.MYSQL);
}
public static String formatOracle(String sql) {
return format(sql, JdbcUtils.ORACLE);
}
public static String formatOdps(String sql) {
return format(sql, JdbcUtils.ODPS);
}
public static String toOracleString(SQLObject sqlObject) {
StringBuilder out = new StringBuilder();
sqlObject.accept(new OracleOutputVisitor(out, false));
String sql = out.toString();
return sql;
}
public static String toPGString(SQLObject sqlObject) {
StringBuilder out = new StringBuilder();
sqlObject.accept(new PGOutputVisitor(out));
String sql = out.toString();
return sql;
}
public static String toDB2String(SQLObject sqlObject) {
StringBuilder out = new StringBuilder();
sqlObject.accept(new DB2OutputVisitor(out));
String sql = out.toString();
return sql;
}
public static String toSQLServerString(SQLObject sqlObject) {
StringBuilder out = new StringBuilder();
sqlObject.accept(new SQLServerOutputVisitor(out));
String sql = out.toString();
return sql;
}
public static String formatPGSql(String sql) {
return format(sql, JdbcUtils.POSTGRESQL);
}
public static SQLExpr toSQLExpr(String sql, String dbType) {
SQLExprParser parser = SQLParserUtils.createExprParser(sql, dbType);
SQLExpr expr = parser.expr();
if (parser.getLexer().token() != Token.EOF) {
throw new ParserException("illegal sql expr : " + sql);
}
return expr;
}
public static List<SQLStatement> toStatementList(String sql, String dbType) {
SQLStatementParser parser = SQLParserUtils.createSQLStatementParser(sql, dbType);
return parser.parseStatementList();
}
public static SQLExpr toSQLExpr(String sql) {
return toSQLExpr(sql, null);
}
public static String format(String sql, String dbType) {
return format(sql, dbType, null);
}
public static String format(String sql, String dbType, List<Object> parameters) {
try {
List<SQLStatement> statementList = toStatementList(sql, dbType);
return toSQLString(statementList, dbType, parameters);
} catch (ParserException ex) {
LOG.warn("format error", ex);
return sql;
}
}
public static String toSQLString(List<SQLStatement> statementList, String dbType) {
return toSQLString(statementList, dbType, null);
}
public static String toSQLString(List<SQLStatement> statementList, String dbType, List<Object> parameters) {
StringBuilder out = new StringBuilder();
SQLASTOutputVisitor visitor = createFormatOutputVisitor(out, statementList, dbType);
if (parameters != null) {
visitor.setParameters(parameters);
}
for (SQLStatement stmt : statementList) {
stmt.accept(visitor);
}
return out.toString();
}
public static SQLASTOutputVisitor createFormatOutputVisitor(Appendable out, List<SQLStatement> statementList,
String dbType) {
if (JdbcUtils.ORACLE.equals(dbType) || JdbcUtils.ALI_ORACLE.equals(dbType)) {
if (statementList.size() == 1) {
return new OracleOutputVisitor(out, false);
} else {
return new OracleOutputVisitor(out, true);
}
}
if (JdbcUtils.MYSQL.equals(dbType) || //
JdbcUtils.MARIADB.equals(dbType) || //
JdbcUtils.H2.equals(dbType)) {
return new MySqlOutputVisitor(out);
}
if (JdbcUtils.POSTGRESQL.equals(dbType)) {
return new PGOutputVisitor(out);
}
if (JdbcUtils.SQL_SERVER.equals(dbType) || JdbcUtils.JTDS.equals(dbType)) {
return new SQLServerOutputVisitor(out);
}
if (JdbcUtils.DB2.equals(dbType)) {
return new DB2OutputVisitor(out);
}
return new SQLASTOutputVisitor(out);
}
public static SchemaStatVisitor createSchemaStatVisitor(List<SQLStatement> statementList, String dbType) {
if (JdbcUtils.ORACLE.equals(dbType) || JdbcUtils.ALI_ORACLE.equals(dbType)) {
if (statementList.size() == 1) {
return new OracleSchemaStatVisitor();
} else {
return new OracleSchemaStatVisitor();
}
}
if (JdbcUtils.MYSQL.equals(dbType) || //
JdbcUtils.MARIADB.equals(dbType) || //
JdbcUtils.H2.equals(dbType)) {
return new MySqlSchemaStatVisitor();
}
if (JdbcUtils.POSTGRESQL.equals(dbType)) {
return new PGSchemaStatVisitor();
}
if (JdbcUtils.SQL_SERVER.equals(dbType) || JdbcUtils.JTDS.equals(dbType)) {
return new SQLServerSchemaStatVisitor();
}
if (JdbcUtils.DB2.equals(dbType)) {
return new DB2SchemaStatVisitor();
}
return new SchemaStatVisitor();
}
public static List<SQLStatement> parseStatements(String sql, String dbType) {
SQLStatementParser parser = SQLParserUtils.createSQLStatementParser(sql, dbType);
List<SQLStatement> stmtList = parser.parseStatementList();
if (parser.getLexer().token() != Token.EOF) {
throw new DruidRuntimeException("syntax error : " + sql);
}
return stmtList;
}
/**
* @author owenludong.lud
* @param columnName
* @param tableAlias
* @param pattern if pattern is null,it will be set {%Y-%m-%d %H:%i:%s} as mysql default value and set {yyyy-mm-dd
* hh24:mi:ss} as oracle default value
* @param dbType {@link JdbcConstants} if dbType is null ,it will be set the mysql as a default value
*/
public static String buildToDate(String columnName, String tableAlias, String pattern, String dbType) {
StringBuilder sql = new StringBuilder();
if (StringUtils.isEmpty(columnName)) return "";
if (StringUtils.isEmpty(dbType)) dbType = JdbcConstants.MYSQL;
String formatMethod = "";
if (JdbcConstants.MYSQL.equalsIgnoreCase(dbType)) {
formatMethod = "STR_TO_DATE";
if (StringUtils.isEmpty(pattern)) pattern = "%Y-%m-%d %H:%i:%s";
} else if (JdbcConstants.ORACLE.equalsIgnoreCase(dbType)) {
formatMethod = "TO_DATE";
if (StringUtils.isEmpty(pattern)) pattern = "yyyy-mm-dd hh24:mi:ss";
} else {
return "";
// expand date's handle method for other database
}
sql.append(formatMethod).append("(");
if (!StringUtils.isEmpty(tableAlias)) sql.append(tableAlias).append(".");
sql.append(columnName).append(",");
sql.append("'");
sql.append(pattern);
sql.append("')");
return sql.toString();
}
public static List<SQLExpr> split(SQLBinaryOpExpr x) {
List<SQLExpr> groupList = new ArrayList<SQLExpr>();
groupList.add(x.getRight());
SQLExpr left = x.getLeft();
for (;;) {
if (left instanceof SQLBinaryOpExpr && ((SQLBinaryOpExpr) left).getOperator() == x.getOperator()) {
SQLBinaryOpExpr binaryLeft = (SQLBinaryOpExpr) left;
groupList.add(binaryLeft.getRight());
left = binaryLeft.getLeft();
} else {
groupList.add(left);
break;
}
}
return groupList;
}
}