case LITERAL_NCHARS:
sqlExpr = new SQLNCharExpr(lexer.stringVal());
lexer.nextToken();
break;
case VARIANT:
SQLVariantRefExpr varRefExpr = new SQLVariantRefExpr(lexer.stringVal());
lexer.nextToken();
if (varRefExpr.getName().equals("@") && lexer.token() == Token.LITERAL_CHARS) {
varRefExpr.setName("@'" + lexer.stringVal() + "'");
lexer.nextToken();
} else if (varRefExpr.getName().equals("@@") && lexer.token() == Token.LITERAL_CHARS) {
varRefExpr.setName("@@'" + lexer.stringVal() + "'");
lexer.nextToken();
}
sqlExpr = varRefExpr;
break;
case DEFAULT:
sqlExpr = new SQLDefaultExpr();
lexer.nextToken();
break;
case DUAL:
case KEY:
case DISTINCT:
case LIMIT:
case SCHEMA:
case COLUMN:
case IF:
case END:
case COMMENT:
sqlExpr = new SQLIdentifierExpr(lexer.stringVal());
lexer.nextToken();
break;
case CASE:
SQLCaseExpr caseExpr = new SQLCaseExpr();
lexer.nextToken();
if (lexer.token() != Token.WHEN) {
caseExpr.setValueExpr(expr());
}
accept(Token.WHEN);
SQLExpr testExpr = expr();
accept(Token.THEN);
SQLExpr valueExpr = expr();
SQLCaseExpr.Item caseItem = new SQLCaseExpr.Item(testExpr, valueExpr);
caseExpr.addItem(caseItem);
while (lexer.token() == Token.WHEN) {
lexer.nextToken();
testExpr = expr();
accept(Token.THEN);
valueExpr = expr();
caseItem = new SQLCaseExpr.Item(testExpr, valueExpr);
caseExpr.getItems().add(caseItem);
}
if (lexer.token() == Token.ELSE) {
lexer.nextToken();
caseExpr.setElseExpr(expr());
}
accept(Token.END);
sqlExpr = caseExpr;
break;
case EXISTS:
lexer.nextToken();
accept(Token.LPAREN);
sqlExpr = new SQLExistsExpr(createSelectParser().select());
accept(Token.RPAREN);
break;
case NOT:
lexer.nextToken();
if (lexer.token() == Token.EXISTS) {
lexer.nextToken();
accept(Token.LPAREN);
sqlExpr = new SQLExistsExpr(createSelectParser().select(), true);
accept(Token.RPAREN);
} else if (lexer.token() == Token.LPAREN) {
lexer.nextToken();
SQLExpr notTarget = expr();
accept(Token.RPAREN);
notTarget = exprRest(notTarget);
sqlExpr = new SQLNotExpr(notTarget);
return primaryRest(sqlExpr);
} else {
SQLExpr restExpr = expr();
sqlExpr = new SQLNotExpr(restExpr);
}
break;
case SELECT:
SQLQueryExpr queryExpr = new SQLQueryExpr(createSelectParser().select());
sqlExpr = queryExpr;
break;
case CAST:
lexer.nextToken();
accept(Token.LPAREN);
SQLCastExpr cast = new SQLCastExpr();
cast.setExpr(expr());
accept(Token.AS);
cast.setDataType(parseDataType());
accept(Token.RPAREN);
sqlExpr = cast;
break;
case SUB:
lexer.nextToken();
switch (lexer.token()) {
case LITERAL_INT:
Number integerValue = lexer.integerValue();
if (integerValue instanceof Integer) {
int intVal = ((Integer) integerValue).intValue();
if (intVal == Integer.MIN_VALUE) {
integerValue = Long.valueOf(((long) intVal) * -1);
} else {
integerValue = Integer.valueOf(intVal * -1);
}
} else if (integerValue instanceof Long) {
long longVal = ((Long) integerValue).longValue();
if (longVal == 2147483648L) {
integerValue = Integer.valueOf((int) (((long) longVal) * -1));
} else {
integerValue = Long.valueOf(longVal * -1);
}
} else {
integerValue = ((BigInteger) integerValue).negate();
}
sqlExpr = new SQLIntegerExpr(integerValue);
lexer.nextToken();
break;
case LITERAL_FLOAT:
sqlExpr = new SQLNumberExpr(lexer.decimalValue().negate());
lexer.nextToken();
break;
case IDENTIFIER: // 当负号后面为字段的情况
sqlExpr = new SQLIdentifierExpr(lexer.stringVal());
sqlExpr = new SQLUnaryExpr(SQLUnaryOperator.Negative, sqlExpr);
lexer.nextToken();
break;
case QUES:
sqlExpr = new SQLUnaryExpr(SQLUnaryOperator.Negative, new SQLVariantRefExpr("?"));
lexer.nextToken();
break;
case LPAREN:
lexer.nextToken();
sqlExpr = expr();
accept(Token.RPAREN);
sqlExpr = new SQLUnaryExpr(SQLUnaryOperator.Negative, sqlExpr);
break;
default:
throw new ParserException("TODO : " + lexer.token());
}
break;
case PLUS:
lexer.nextToken();
switch (lexer.token()) {
case LITERAL_INT:
sqlExpr = new SQLIntegerExpr(lexer.integerValue());
lexer.nextToken();
break;
case LITERAL_FLOAT:
sqlExpr = new SQLNumberExpr(lexer.decimalValue());
lexer.nextToken();
break;
case LPAREN:
lexer.nextToken();
sqlExpr = expr();
accept(Token.RPAREN);
sqlExpr = new SQLUnaryExpr(SQLUnaryOperator.Plus, sqlExpr);
break;
default:
throw new ParserException("TODO");
}
break;
case TILDE:
lexer.nextToken();
SQLExpr unaryValueExpr = expr();
SQLUnaryExpr unary = new SQLUnaryExpr(SQLUnaryOperator.Compl, unaryValueExpr);
sqlExpr = unary;
break;
case QUES:
lexer.nextToken();
SQLVariantRefExpr quesVarRefExpr = new SQLVariantRefExpr("?");
quesVarRefExpr.setIndex(lexer.nextVarIndex());
sqlExpr = quesVarRefExpr;
break;
case LEFT:
sqlExpr = new SQLIdentifierExpr("LEFT");
lexer.nextToken();
break;
case RIGHT:
sqlExpr = new SQLIdentifierExpr("RIGHT");
lexer.nextToken();
break;
case DATABASE:
sqlExpr = new SQLIdentifierExpr("DATABASE");
lexer.nextToken();
break;
case LOCK:
sqlExpr = new SQLIdentifierExpr("LOCK");
lexer.nextToken();
break;
case NULL:
sqlExpr = new SQLNullExpr();
lexer.nextToken();
break;
case BANG:
lexer.nextToken();
SQLExpr bangExpr = expr();
sqlExpr = new SQLUnaryExpr(SQLUnaryOperator.Not, bangExpr);
break;
case LITERAL_HEX:
String hex = lexer.hexString();
sqlExpr = new SQLHexExpr(hex);
lexer.nextToken();
break;
case INTERVAL:
sqlExpr = parseInterval();
break;
case COLON:
lexer.nextToken();
if (lexer.token == Token.LITERAL_ALIAS) {
sqlExpr = new SQLVariantRefExpr(":\"" + lexer.stringVal() + "\"");
lexer.nextToken();
}
break;
case ANY:
lexer.nextToken();