private static boolean mergeEqual(SQLExpr a, SQLExpr b) {
if (!(a instanceof SQLBinaryOpExpr)) {
return false;
}
if (!(b instanceof SQLBinaryOpExpr)) {
return false;
}
SQLBinaryOpExpr binaryA = (SQLBinaryOpExpr) a;
SQLBinaryOpExpr binaryB = (SQLBinaryOpExpr) b;
if (binaryA.getOperator() != SQLBinaryOperator.Equality) {
return false;
}
if (binaryB.getOperator() != SQLBinaryOperator.Equality) {
return false;
}
if (!(binaryA.getRight() instanceof SQLLiteralExpr
|| binaryA.getRight() instanceof SQLVariantRefExpr)) {
return false;
}
if (!(binaryB.getRight() instanceof SQLLiteralExpr
|| binaryB.getRight() instanceof SQLVariantRefExpr)) {
return false;
}
return binaryA.getLeft().toString().equals(binaryB.getLeft().toString());
}
/**
* 目前只支持这个操作 单条insert（非批量）
*
* @param schema
* @param rrs
* @param partitionColumn
* @param tableName
* @param insertStmt
* @throws SQLNonTransientException
*/
private void parserSingleInsert(
SchemaConfig schema,
RouteResultset rrs,
String partitionColumn,
String tableName,
MySqlInsertStatement insertStmt)
throws SQLNonTransientException {
boolean isFound = false;
// 将分片的键 作为 路由计算单元
for (int i = 0; i < insertStmt.getColumns().size(); i++) {
if (partitionColumn.equalsIgnoreCase(
StringUtil.removeBackquote(insertStmt.getColumns().get(i).toString()))) {
// 找到分片字段
isFound = true;
String column = StringUtil.removeBackquote(insertStmt.getColumns().get(i).toString());
String value =
StringUtil.removeBackquote(insertStmt.getValues().getValues().get(i).toString());
RouteCalculateUnit routeCalculateUnit = new RouteCalculateUnit();
routeCalculateUnit.addShardingExpr(tableName, column, value);
ctx.addRouteCalculateUnit(routeCalculateUnit);
// mycat是单分片键，找到了就返回
break;
}
}
if (!isFound) { // 分片表的
String msg =
"bad insert sql (sharding column:" + partitionColumn + " not provided," + insertStmt;
logger.warn(msg);
throw new SQLNonTransientException(msg);
}
// 这种语句不应该支持
// insert into .... on duplicateKey
// such as : INSERT INTO TABLEName (a,b,c) VALUES (1,2,3) ON DUPLICATE KEY UPDATE
// b=VALUES(b);
// INSERT INTO TABLEName (a,b,c) VALUES (1,2,3) ON DUPLICATE KEY UPDATE c=c+1;
// du plicate 处理！！
if (insertStmt.getDuplicateKeyUpdate() != null) {
List<SQLExpr> updateList = insertStmt.getDuplicateKeyUpdate();
for (SQLExpr expr : updateList) {
SQLBinaryOpExpr opExpr = (SQLBinaryOpExpr) expr;
String column = StringUtil.removeBackquote(opExpr.getLeft().toString().toUpperCase());
if (column.equals(partitionColumn)) {
String msg = "partion key can't be updated: " + tableName + " -> " + partitionColumn;
logger.warn(msg);
throw new SQLNonTransientException(msg);
}
}
}
}
public void test_binary() throws Exception {
SQLExprParser exprParser = new SQLExprParser("AGE > 5");
SQLBinaryOpExpr binaryOpExpr = (SQLBinaryOpExpr) exprParser.expr();
Assert.assertEquals(SQLBinaryOperator.GreaterThan, binaryOpExpr.getOperator());
SQLIdentifierExpr left = (SQLIdentifierExpr) binaryOpExpr.getLeft();
SQLIntegerExpr right = (SQLIntegerExpr) binaryOpExpr.getRight();
Assert.assertEquals("AGE", left.getName());
Assert.assertEquals(5, right.getNumber().intValue());
}
private static boolean isLiteralExpr(SQLExpr expr) {
if (expr instanceof SQLLiteralExpr) {
return true;
}
if (expr instanceof SQLBinaryOpExpr) {
SQLBinaryOpExpr binary = (SQLBinaryOpExpr) expr;
return isLiteralExpr(binary.getLeft()) && isLiteralExpr(binary.getRight());
}
return false;
}
public static boolean visit(ParameterizedVisitor v, SQLNullExpr x) {
SQLObject parent = x.getParent();
if (parent instanceof SQLBinaryOpExpr) {
SQLBinaryOpExpr binaryOpExpr = (SQLBinaryOpExpr) parent;
if (binaryOpExpr.getOperator() == SQLBinaryOperator.IsNot
|| binaryOpExpr.getOperator() == SQLBinaryOperator.Is) {
v.print("NULL");
return false;
}
}
v.print('?');
v.incrementReplaceCunt();
return false;
}
public static void exportParameter(final List<Object> parameters, SQLBinaryOpExpr x) {
if (x.getLeft() instanceof SQLLiteralExpr
&& x.getRight() instanceof SQLLiteralExpr
&& x.getOperator().isRelational()) {
return;
}
{
SQLExpr leftResult = ExportParameterVisitorUtils.exportParameter(parameters, x.getLeft());
if (leftResult != x.getLeft()) {
x.setLeft(leftResult);
}
}
{
SQLExpr rightResult = exportParameter(parameters, x.getRight());
if (rightResult != x.getRight()) {
x.setRight(rightResult);
}
}
}
private void parseTableSourceQueryTableExpr(OracleSelectTableReference tableReference) {
tableReference.setExpr(this.createExprParser().expr());
if (identifierEquals("SAMPLE")) {
lexer.nextToken();
SampleClause sample = new SampleClause();
if (identifierEquals("BLOCK")) {
sample.setBlock(true);
}
accept(Token.LPAREN);
if (lexer.token() != Token.LITERAL_INT) {
throw new ParserException("syntax error : " + lexer.token());
}
sample.setPercent(lexer.integerValue().intValue());
lexer.nextToken();
accept(Token.RPAREN);
if (identifierEquals("SEED")) {
lexer.nextToken();
accept(Token.LPAREN);
sample.setSeedValue(expr());
accept(Token.RPAREN);
}
tableReference.setSampleClause(sample);
}
if (identifierEquals("PARTITION")) {
lexer.nextToken();
PartitionExtensionClause partition = new PartitionExtensionClause();
if (lexer.token() == Token.LPAREN) {
lexer.nextToken();
partition.setPartition(createExprParser().name());
accept(Token.RPAREN);
} else {
accept(Token.FOR);
accept(Token.LPAREN);
createExprParser().names(partition.getFor());
accept(Token.RPAREN);
}
tableReference.setPartition(partition);
}
if (identifierEquals("SUBPARTITION")) {
lexer.nextToken();
PartitionExtensionClause partition = new PartitionExtensionClause();
partition.setSubPartition(true);
if (lexer.token() == Token.LPAREN) {
lexer.nextToken();
partition.setPartition(createExprParser().name());
accept(Token.RPAREN);
} else {
accept(Token.FOR);
accept(Token.LPAREN);
createExprParser().names(partition.getFor());
accept(Token.RPAREN);
}
tableReference.setPartition(partition);
}
if (lexer.token() == Token.AS) {
lexer.nextToken();
if (identifierEquals("OF")) {
lexer.nextToken();
AsOfFlashbackQueryClause clause = new AsOfFlashbackQueryClause();
if (identifierEquals("SCN")) {
clause.setType(AsOfFlashbackQueryClause.Type.SCN);
lexer.nextToken();
} else {
accept(Token.TIMESTAMP);
clause.setType(AsOfFlashbackQueryClause.Type.TIMESTAMP);
}
clause.setExpr(createExprParser().primary());
tableReference.setFlashback(clause);
} else {
throw new SQLParseException("TODO");
}
} else if (identifierEquals("VERSIONS")) {
lexer.nextToken();
if (lexer.token() == Token.BETWEEN) {
lexer.nextToken();
VersionsFlashbackQueryClause clause = new VersionsFlashbackQueryClause();
if (identifierEquals("SCN")) {
clause.setType(AsOfFlashbackQueryClause.Type.SCN);
lexer.nextToken();
} else {
accept(Token.TIMESTAMP);
clause.setType(AsOfFlashbackQueryClause.Type.TIMESTAMP);
}
SQLBinaryOpExpr binaryExpr = (SQLBinaryOpExpr) createExprParser().expr();
if (binaryExpr.getOperator() != SQLBinaryOperator.BooleanAnd) {
throw new SQLParseException("syntax error : " + binaryExpr.getOperator());
}
clause.setBegin(binaryExpr.getLeft());
clause.setEnd(binaryExpr.getRight());
tableReference.setFlashback(clause);
} else {
throw new SQLParseException("TODO");
}
}
}
public static SQLBinaryOpExpr merge(ParameterizedVisitor v, SQLBinaryOpExpr x) {
SQLExpr left = x.getLeft();
SQLExpr right = x.getRight();
SQLObject parent = x.getParent();
if (left instanceof SQLLiteralExpr && right instanceof SQLLiteralExpr) {
if (x.getOperator() == SQLBinaryOperator.Equality //
|| x.getOperator() == SQLBinaryOperator.NotEqual) {
if ((left instanceof SQLIntegerExpr) && (right instanceof SQLIntegerExpr)) {
if (((SQLIntegerExpr) left).getNumber().intValue() < 100) {
left.putAttribute(ATTR_PARAMS_SKIP, true);
}
if (((SQLIntegerExpr) right).getNumber().intValue() < 100) {
right.putAttribute(ATTR_PARAMS_SKIP, true);
}
} else {
left.putAttribute(ATTR_PARAMS_SKIP, true);
right.putAttribute(ATTR_PARAMS_SKIP, true);
}
}
return x;
}
for (; ; ) {
if (x.getRight() instanceof SQLBinaryOpExpr) {
if (x.getLeft() instanceof SQLBinaryOpExpr) {
SQLBinaryOpExpr leftBinaryExpr = (SQLBinaryOpExpr) x.getLeft();
if (leftBinaryExpr.getRight().equals(x.getRight())) {
x = leftBinaryExpr;
v.incrementReplaceCunt();
continue;
}
}
SQLExpr mergedRight = merge(v, (SQLBinaryOpExpr) x.getRight());
if (mergedRight != x.getRight()) {
x = new SQLBinaryOpExpr(x.getLeft(), x.getOperator(), mergedRight);
v.incrementReplaceCunt();
}
x.setParent(parent);
}
break;
}
if (x.getLeft() instanceof SQLBinaryOpExpr) {
SQLExpr mergedLeft = merge(v, (SQLBinaryOpExpr) x.getLeft());
if (mergedLeft != x.getLeft()) {
x = new SQLBinaryOpExpr(mergedLeft, x.getOperator(), x.getRight());
v.incrementReplaceCunt();
}
x.setParent(parent);
}
// ID = ? OR ID = ? => ID = ?
if (x.getOperator() == SQLBinaryOperator.BooleanOr) {
if ((left instanceof SQLBinaryOpExpr) && (right instanceof SQLBinaryOpExpr)) {
SQLBinaryOpExpr leftBinary = (SQLBinaryOpExpr) x.getLeft();
SQLBinaryOpExpr rightBinary = (SQLBinaryOpExpr) x.getRight();
if (mergeEqual(leftBinary, rightBinary)) {
v.incrementReplaceCunt();
return leftBinary;
}
if (isLiteralExpr(leftBinary.getLeft()) //
&& leftBinary.getOperator() == SQLBinaryOperator.BooleanOr) {
if (mergeEqual(leftBinary.getRight(), right)) {
v.incrementReplaceCunt();
return leftBinary;
}
}
}
}
return x;
}
public boolean visit(SQLBinaryOpExpr x) {
x.getLeft().setParent(x);
x.getRight().setParent(x);
switch (x.getOperator()) {
case Equality:
case NotEqual:
case GreaterThan:
case GreaterThanOrEqual:
case LessThan:
case LessThanOrEqual:
case LessThanOrEqualOrGreaterThan:
case Like:
case NotLike:
case Is:
case IsNot:
handleCondition(x.getLeft(), x.getOperator().name, x.getRight());
handleCondition(x.getRight(), x.getOperator().name, x.getLeft());
handleRelationship(x.getLeft(), x.getOperator().name, x.getRight());
break;
default:
break;
}
return true;
}
public static boolean visit(SQLEvalVisitor visitor, SQLBinaryOpExpr x) {
SQLExpr left = x.getLeft();
SQLExpr right = x.getRight();
left.accept(visitor);
if (!left.getAttributes().containsKey(EVAL_VALUE)) {
return false;
}
right.accept(visitor);
if (!right.getAttributes().containsKey(EVAL_VALUE)) {
return false;
}
Object value = null;
switch (x.getOperator()) {
case Add:
value = add(left.getAttribute(EVAL_VALUE), right.getAttributes().get(EVAL_VALUE));
x.putAttribute(EVAL_VALUE, value);
break;
case Subtract:
value = sub(left.getAttribute(EVAL_VALUE), right.getAttributes().get(EVAL_VALUE));
x.putAttribute(EVAL_VALUE, value);
break;
case Multiply:
value = multi(left.getAttribute(EVAL_VALUE), right.getAttributes().get(EVAL_VALUE));
x.putAttribute(EVAL_VALUE, value);
break;
case Divide:
value = div(left.getAttribute(EVAL_VALUE), right.getAttributes().get(EVAL_VALUE));
x.putAttribute(EVAL_VALUE, value);
break;
case GreaterThan:
value = gt(left.getAttribute(EVAL_VALUE), right.getAttributes().get(EVAL_VALUE));
x.putAttribute(EVAL_VALUE, value);
break;
case GreaterThanOrEqual:
value = gteq(left.getAttribute(EVAL_VALUE), right.getAttributes().get(EVAL_VALUE));
x.putAttribute(EVAL_VALUE, value);
break;
case LessThan:
value = lt(left.getAttribute(EVAL_VALUE), right.getAttributes().get(EVAL_VALUE));
x.putAttribute(EVAL_VALUE, value);
break;
case LessThanOrEqual:
value = lteq(left.getAttribute(EVAL_VALUE), right.getAttributes().get(EVAL_VALUE));
x.putAttribute(EVAL_VALUE, value);
break;
case Is:
value = eq(left.getAttribute(EVAL_VALUE), right.getAttributes().get(EVAL_VALUE));
x.putAttribute(EVAL_VALUE, value);
break;
case IsNot:
value = !eq(left.getAttribute(EVAL_VALUE), right.getAttributes().get(EVAL_VALUE));
x.putAttribute(EVAL_VALUE, value);
break;
case RegExp:
case RLike:
{
String pattern = _string(right.getAttributes().get(EVAL_VALUE));
String input = _string(left.getAttributes().get(EVAL_VALUE));
boolean matchResult = Pattern.matches(pattern, input);
x.putAttribute(EVAL_VALUE, matchResult);
}
break;
case NotRegExp:
case NotRLike:
{
String pattern = _string(right.getAttributes().get(EVAL_VALUE));
String input = _string(left.getAttributes().get(EVAL_VALUE));
boolean matchResult = !Pattern.matches(pattern, input);
x.putAttribute(EVAL_VALUE, matchResult);
}
break;
default:
break;
}
return false;
}
public void parseStatementList(List<SQLStatement> statementList, int max) {
for (; ; ) {
if (max != -1) {
if (statementList.size() >= max) {
return;
}
}
if (lexer.token() == Token.EOF) {
return;
}
if (lexer.token() == Token.END) {
return;
}
if (lexer.token() == Token.ELSE) {
return;
}
if (lexer.token() == (Token.SEMI)) {
lexer.nextToken();
continue;
}
if (lexer.token() == (Token.SELECT)) {
SQLSelectStatement stmt =
new SQLSelectStatement(
new OracleSelectParser(this.exprParser).select(), JdbcConstants.ORACLE);
statementList.add(stmt);
continue;
}
if (lexer.token() == (Token.UPDATE)) {
statementList.add(parseUpdateStatement());
continue;
}
if (lexer.token() == (Token.CREATE)) {
statementList.add(parseCreate());
continue;
}
if (lexer.token() == Token.INSERT) {
statementList.add(parseInsert());
continue;
}
if (lexer.token() == (Token.DELETE)) {
statementList.add(parseDeleteStatement());
continue;
}
if (lexer.token() == (Token.SLASH)) {
lexer.nextToken();
statementList.add(new OraclePLSQLCommitStatement());
continue;
}
if (lexer.token() == Token.ALTER) {
statementList.add(parserAlter());
continue;
}
if (lexer.token() == Token.WITH) {
statementList.add(new SQLSelectStatement(new OracleSelectParser(this.exprParser).select()));
continue;
}
if (lexer.token() == Token.LBRACE || identifierEquals("CALL")) {
statementList.add(this.parseCall());
continue;
}
if (lexer.token() == Token.MERGE) {
statementList.add(this.parseMerge());
continue;
}
if (lexer.token() == Token.BEGIN) {
statementList.add(this.parseBlock());
continue;
}
if (lexer.token() == Token.DECLARE) {
statementList.add(this.parseBlock());
continue;
}
if (lexer.token() == Token.LOCK) {
statementList.add(this.parseLock());
continue;
}
if (lexer.token() == Token.TRUNCATE) {
statementList.add(this.parseTruncate());
continue;
}
if (lexer.token() == Token.VARIANT) {
SQLExpr variant = this.exprParser.primary();
if (variant instanceof SQLBinaryOpExpr) {
SQLBinaryOpExpr binaryOpExpr = (SQLBinaryOpExpr) variant;
if (binaryOpExpr.getOperator() == SQLBinaryOperator.Assignment) {
SQLSetStatement stmt =
new SQLSetStatement(binaryOpExpr.getLeft(), binaryOpExpr.getRight(), getDbType());
statementList.add(stmt);
continue;
}
}
accept(Token.COLONEQ);
SQLExpr value = this.exprParser.expr();
SQLSetStatement stmt = new SQLSetStatement(variant, value, getDbType());
statementList.add(stmt);
continue;
}
if (lexer.token() == Token.EXCEPTION) {
statementList.add(this.parseException());
continue;
}
if (identifierEquals("EXIT")) {
lexer.nextToken();
OracleExitStatement stmt = new OracleExitStatement();
if (lexer.token() == Token.WHEN) {
lexer.nextToken();
stmt.setWhen(this.exprParser.expr());
}
statementList.add(stmt);
continue;
}
if (lexer.token() == Token.FETCH || identifierEquals("FETCH")) {
SQLStatement stmt = parseFetch();
statementList.add(stmt);
continue;
}
if (identifierEquals("ROLLBACK")) {
SQLRollbackStatement stmt = parseRollback();
statementList.add(stmt);
continue;
}
if (lexer.token() == Token.EXPLAIN) {
statementList.add(this.parseExplain());
continue;
}
if (lexer.token() == Token.IDENTIFIER) {
SQLExpr expr = exprParser.expr();
OracleExprStatement stmt = new OracleExprStatement(expr);
statementList.add(stmt);
continue;
}
if (lexer.token() == Token.LPAREN) {
char ch = lexer.current();
int bp = lexer.bp();
lexer.nextToken();
if (lexer.token() == Token.SELECT) {
lexer.reset(bp, ch, Token.LPAREN);
statementList.add(this.parseSelect());
continue;
} else {
throw new ParserException("TODO : " + lexer.token() + " " + lexer.stringVal());
}
}
if (lexer.token() == Token.SET) {
statementList.add(this.parseSet());
continue;
}
if (lexer.token() == Token.GRANT) {
statementList.add(this.parseGrant());
continue;
}
if (lexer.token() == Token.REVOKE) {
statementList.add(this.parseRevoke());
continue;
}
if (lexer.token() == Token.COMMENT) {
statementList.add(this.parseComment());
continue;
}
if (lexer.token() == Token.FOR) {
statementList.add(this.parseFor());
continue;
}
if (lexer.token() == Token.LOOP) {
statementList.add(this.parseLoop());
continue;
}
if (lexer.token() == Token.IF) {
statementList.add(this.parseIf());
continue;
}
if (lexer.token() == Token.GOTO) {
lexer.nextToken();
SQLName label = this.exprParser.name();
OracleGotoStatement stmt = new OracleGotoStatement(label);
statementList.add(stmt);
continue;
}
if (lexer.token() == Token.COMMIT) {
lexer.nextToken();
if (identifierEquals("WORK")) {
lexer.nextToken();
}
OracleCommitStatement stmt = new OracleCommitStatement();
if (identifierEquals("WRITE")) {
stmt.setWrite(true);
lexer.nextToken();
for (; ; ) {
if (lexer.token() == Token.WAIT) {
lexer.nextToken();
stmt.setWait(Boolean.TRUE);
continue;
} else if (lexer.token() == Token.NOWAIT) {
lexer.nextToken();
stmt.setWait(Boolean.FALSE);
continue;
} else if (lexer.token() == Token.IMMEDIATE) {
lexer.nextToken();
stmt.setImmediate(Boolean.TRUE);
continue;
} else if (identifierEquals("BATCH")) {
lexer.nextToken();
stmt.setImmediate(Boolean.FALSE);
continue;
}
break;
}
}
statementList.add(stmt);
continue;
}
if (lexer.token() == Token.SAVEPOINT) {
lexer.nextToken();
OracleSavePointStatement stmt = new OracleSavePointStatement();
if (lexer.token() == Token.TO) {
lexer.nextToken();
stmt.setTo(this.exprParser.name());
}
statementList.add(stmt);
continue;
}
if (lexer.token() == Token.LTLT) {
lexer.nextToken();
SQLName label = this.exprParser.name();
OracleLabelStatement stmt = new OracleLabelStatement(label);
accept(Token.GTGT);
statementList.add(stmt);
continue;
}
if (lexer.token() == Token.DROP) {
lexer.nextToken();
if (lexer.token() == Token.TABLE) {
SQLDropTableStatement stmt = parseDropTable(false);
statementList.add(stmt);
continue;
}
boolean isPublic = false;
if (identifierEquals("PUBLIC")) {
lexer.nextToken();
isPublic = true;
}
if (lexer.token() == Token.DATABASE) {
lexer.nextToken();
if (identifierEquals("LINK")) {
lexer.nextToken();
OracleDropDbLinkStatement stmt = new OracleDropDbLinkStatement();
if (isPublic) {
stmt.setPublic(isPublic);
}
stmt.setName(this.exprParser.name());
statementList.add(stmt);
continue;
}
}
if (lexer.token() == Token.INDEX) {
SQLStatement stmt = parseDropIndex();
statementList.add(stmt);
continue;
}
if (lexer.token() == Token.VIEW) {
SQLStatement stmt = parseDropView(false);
statementList.add(stmt);
continue;
}
if (lexer.token() == Token.SEQUENCE) {
SQLDropSequenceStatement stmt = parseDropSequece(false);
statementList.add(stmt);
continue;
}
if (lexer.token() == Token.TRIGGER) {
SQLDropTriggerStatement stmt = parseDropTrigger(false);
statementList.add(stmt);
continue;
}
if (lexer.token() == Token.USER) {
SQLDropUserStatement stmt = parseDropUser();
statementList.add(stmt);
continue;
}
throw new ParserException("TODO : " + lexer.token() + " " + lexer.stringVal());
}
if (lexer.token() == Token.NULL) {
lexer.nextToken();
OracleExprStatement stmt = new OracleExprStatement(new SQLNullExpr());
statementList.add(stmt);
continue;
}
if (lexer.token() == Token.OPEN) {
SQLStatement stmt = this.parseOpen();
statementList.add(stmt);
continue;
}
throw new ParserException("TODO : " + lexer.token() + " " + lexer.stringVal());
}
}
