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An JDBC datasource implementation.
/*
* Copyright 1999-2017 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.blink.parser;
import com.alibaba.druid.sql.ast.SQLExpr;
import com.alibaba.druid.sql.ast.statement.SQLColumnDefinition;
import com.alibaba.druid.sql.ast.statement.SQLCreateTableStatement;
import com.alibaba.druid.sql.ast.statement.SQLTableConstraint;
import com.alibaba.druid.sql.dialect.blink.ast.BlinkCreateTableStatement;
import com.alibaba.druid.sql.parser.ParserException;
import com.alibaba.druid.sql.parser.SQLCreateTableParser;
import com.alibaba.druid.sql.parser.SQLExprParser;
import com.alibaba.druid.sql.parser.Token;
import com.alibaba.druid.util.FnvHash;
public class BlinkCreateTableParser extends SQLCreateTableParser {
public BlinkCreateTableParser(String sql) {
super(new BlinkExprParser(sql));
}
public BlinkCreateTableParser(SQLExprParser exprParser) {
super(exprParser);
}
public SQLCreateTableStatement parseCreateTable(boolean acceptCreate) {
BlinkCreateTableStatement stmt = new BlinkCreateTableStatement();
if (acceptCreate) {
accept(Token.CREATE);
}
if (lexer.identifierEquals(FnvHash.Constants.EXTERNAL)) {
lexer.nextToken();
stmt.setExternal(true);
}
accept(Token.TABLE);
if (lexer.token() == Token.IF || lexer.identifierEquals("IF")) {
lexer.nextToken();
accept(Token.NOT);
accept(Token.EXISTS);
stmt.setIfNotExiists(true);
}
stmt.setName(this.exprParser.name());
accept(Token.LPAREN);
if (lexer.isKeepComments() && lexer.hasComment()) {
stmt.addBodyBeforeComment(lexer.readAndResetComments());
}
for_:
for (; ; ) {
SQLColumnDefinition column = null;
switch (lexer.token()) {
case IDENTIFIER:
case KEY:
column = this.exprParser.parseColumn();
column.setParent(stmt);
stmt.getTableElementList().add(column);
break;
case PRIMARY:
SQLTableConstraint constraint = this.parseConstraint();
constraint.setParent(stmt);
stmt.getTableElementList().add(constraint);
break;
case PERIOD:
lexer.nextToken();
accept(Token.FOR);
SQLExpr periodFor = this.exprParser.primary();
stmt.setPeriodFor(periodFor);
break for_;
default:
throw new ParserException("expect identifier. " + lexer.info());
}
// } else if (lexer.token() == Token.CONSTRAINT //
// || lexer.token() == Token.PRIMARY //
// || lexer.token() == Token.UNIQUE) {
// SQLTableConstraint constraint = this.parseConstraint();
// constraint.setParent(stmt);
// stmt.getTableElementList().add(constraint);
// }
if (lexer.isKeepComments() && lexer.hasComment() && column != null) {
column.addAfterComment(lexer.readAndResetComments());
}
if (!(lexer.token() == (Token.COMMA))) {
break;
} else {
lexer.nextToken();
if (lexer.isKeepComments() && lexer.hasComment() && column != null) {
column.addAfterComment(lexer.readAndResetComments());
}
}
}
accept(Token.RPAREN);
if (lexer.token() == Token.COMMENT) {
lexer.nextToken();
stmt.setComment(this.exprParser.primary());
}
if (stmt.getClusteredBy().size() > 0 || stmt.getSortedBy().size() > 0) {
accept(Token.INTO);
if (lexer.token() == Token.LITERAL_INT) {
stmt.setBuckets(lexer.integerValue().intValue());
lexer.nextToken();
} else {
throw new ParserException("into buckets must be integer. " + lexer.info());
}
acceptIdentifier("BUCKETS");
}
if (lexer.token() == Token.WITH) {
lexer.nextToken();
accept(Token.LPAREN);
parseAssignItems(stmt.getTableOptions(), stmt, true);
accept(Token.RPAREN);
}
return stmt;
}
}