protected SQLExpr parseInterval() {
accept(Token.INTERVAL);
OracleIntervalExpr interval = new OracleIntervalExpr();
if (lexer.token() != Token.LITERAL_CHARS) {
return new SQLIdentifierExpr("INTERVAL");
}
interval.setValue(new SQLCharExpr(lexer.stringVal()));
lexer.nextToken();
OracleIntervalType type = OracleIntervalType.valueOf(lexer.stringVal());
interval.setType(type);
lexer.nextToken();
if (lexer.token() == Token.LPAREN) {
lexer.nextToken();
if (lexer.token() != Token.LITERAL_INT) {
throw new ParserException("syntax error");
}
interval.setPrecision(lexer.integerValue().intValue());
lexer.nextToken();
if (lexer.token() == Token.COMMA) {
lexer.nextToken();
if (lexer.token() != Token.LITERAL_INT) {
throw new ParserException("syntax error");
}
interval.setFactionalSecondsPrecision(lexer.integerValue().intValue());
lexer.nextToken();
}
accept(Token.RPAREN);
}
if (lexer.token() == Token.TO) {
lexer.nextToken();
if (identifierEquals("SECOND")) {
lexer.nextToken();
interval.setToType(OracleIntervalType.SECOND);
if (lexer.token() == Token.LPAREN) {
lexer.nextToken();
if (lexer.token() != Token.LITERAL_INT) {
throw new ParserException("syntax error");
}
interval.setToFactionalSecondsPrecision(lexer.integerValue().intValue());
lexer.nextToken();
accept(Token.RPAREN);
}
} else {
interval.setToType(OracleIntervalType.MONTH);
lexer.nextToken();
}
}
return interval;
}
public SQLExpr primaryRest(SQLExpr expr) {
if (expr.getClass() == SQLIdentifierExpr.class) {
String ident = ((SQLIdentifierExpr) expr).getName();
if ("DATE".equalsIgnoreCase(ident)) {
OracleDateExpr timestamp = new OracleDateExpr();
String literal = lexer.stringVal();
timestamp.setLiteral(literal);
accept(Token.LITERAL_CHARS);
return primaryRest(timestamp);
}
if ("TIMESTAMP".equalsIgnoreCase(ident)) {
if (lexer.token() != Token.LITERAL_ALIAS && lexer.token() != Token.LITERAL_CHARS) {
return new SQLIdentifierExpr("TIMESTAMP");
}
OracleTimestampExpr timestamp = new OracleTimestampExpr();
String literal = lexer.stringVal();
timestamp.setLiteral(literal);
accept(Token.LITERAL_CHARS);
if (identifierEquals("AT")) {
lexer.nextToken();
acceptIdentifier("TIME");
acceptIdentifier("ZONE");
String timezone = lexer.stringVal();
timestamp.setTimeZone(timezone);
accept(Token.LITERAL_CHARS);
}
return primaryRest(timestamp);
}
}
if (lexer.token() == Token.IDENTIFIER && expr instanceof SQLNumericLiteralExpr) {
String ident = lexer.stringVal();
if (ident.length() == 1) {
char unit = ident.charAt(0);
switch (unit) {
case 'K':
case 'M':
case 'G':
case 'T':
case 'P':
case 'E':
case 'k':
case 'm':
case 'g':
case 't':
case 'p':
case 'e':
expr = new OracleSizeExpr(expr, OracleSizeExpr.Unit.valueOf(ident.toUpperCase()));
lexer.nextToken();
break;
default:
break;
}
}
}
if (lexer.token() == Token.DOTDOT) {
lexer.nextToken();
SQLExpr upBound = expr();
return new OracleRangeExpr(expr, upBound);
}
if (lexer.token() == Token.MONKEYS_AT) {
lexer.nextToken();
OracleDbLinkExpr dblink = new OracleDbLinkExpr();
dblink.setExpr(expr);
if (lexer.token() == Token.BANG) {
dblink.setDbLink("!");
lexer.nextToken();
} else {
String link = lexer.stringVal();
accept(Token.IDENTIFIER);
dblink.setDbLink(link);
}
expr = dblink;
}
if (identifierEquals("DAY") || identifierEquals("YEAR")) {
lexer.mark();
String name = lexer.stringVal();
lexer.nextToken();
if (lexer.token() == Token.COMMA) {
lexer.reset();
return expr;
}
OracleIntervalExpr interval = new OracleIntervalExpr();
interval.setValue(expr);
OracleIntervalType type = OracleIntervalType.valueOf(name);
interval.setType(type);
if (lexer.token() == Token.LPAREN) {
lexer.nextToken();
if (lexer.token() != Token.LITERAL_INT) {
throw new ParserException("syntax error");
}
interval.setPrecision(lexer.integerValue().intValue());
lexer.nextToken();
accept(Token.RPAREN);
}
accept(Token.TO);
if (identifierEquals("SECOND")) {
lexer.nextToken();
interval.setToType(OracleIntervalType.SECOND);
if (lexer.token() == Token.LPAREN) {
lexer.nextToken();
if (lexer.token() != Token.LITERAL_INT) {
throw new ParserException("syntax error");
}
interval.setFactionalSecondsPrecision(lexer.integerValue().intValue());
lexer.nextToken();
accept(Token.RPAREN);
}
} else {
interval.setToType(OracleIntervalType.MONTH);
lexer.nextToken();
}
expr = interval;
}
if (identifierEquals("AT")) {
char markChar = lexer.current();
int markBp = lexer.bp();
lexer.nextToken();
if (identifierEquals("LOCAL")) {
lexer.nextToken();
expr = new OracleDatetimeExpr(expr, new SQLIdentifierExpr("LOCAL"));
} else {
if (identifierEquals("TIME")) {
lexer.nextToken();
} else {
lexer.reset(markBp, markChar, Token.IDENTIFIER);
return expr;
}
acceptIdentifier("ZONE");
SQLExpr timeZone = primary();
expr = new OracleDatetimeExpr(expr, timeZone);
}
}
SQLExpr restExpr = super.primaryRest(expr);
if (restExpr != expr && restExpr instanceof SQLMethodInvokeExpr) {
SQLMethodInvokeExpr methodInvoke = (SQLMethodInvokeExpr) restExpr;
if (methodInvoke.getParameters().size() == 1) {
SQLExpr paramExpr = methodInvoke.getParameters().get(0);
if (paramExpr instanceof SQLIdentifierExpr
&& "+".equals(((SQLIdentifierExpr) paramExpr).getName())) {
OracleOuterExpr outerExpr = new OracleOuterExpr();
if (methodInvoke.getOwner() == null) {
outerExpr.setExpr(new SQLIdentifierExpr(methodInvoke.getMethodName()));
} else {
outerExpr.setExpr(
new SQLPropertyExpr(methodInvoke.getOwner(), methodInvoke.getMethodName()));
}
return outerExpr;
}
}
}
return restExpr;
}