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Code Issues Releases Wiki Activity

improve sql parser

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This commit is contained in:
wenshao
2013-03-27 18:21:08 +08:00
parent 255232a8a3
commit 4d85e96301
24 changed files with 597 additions and 97 deletions
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src/main/java/com/alibaba/druid/sql/parser/SQLParser.java
+25 -23
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@@ -45,7 +45,7 @@ public class SQLParser {
}
}
protected String as() {
protected String as() {
String alias = null;
if (lexer.token() == Token.AS) {
@@ -54,36 +54,38 @@ public class SQLParser {
if (lexer.token() == Token.LITERAL_ALIAS) {
alias = '"' + lexer.stringVal() + '"';
lexer.nextToken();
return alias;
}
if (lexer.token() == Token.IDENTIFIER) {
} else if (lexer.token() == Token.IDENTIFIER) {
alias = lexer.stringVal();
lexer.nextToken();
return alias;
}
if (lexer.token() == Token.LITERAL_CHARS) {
} else if (lexer.token() == Token.LITERAL_CHARS) {
alias = "'" + lexer.stringVal() + "'";
lexer.nextToken();
return alias;
} else {
switch (lexer.token()) {
case KEY:
case INDEX:
case CASE:
alias = lexer.token().name();
lexer.nextToken();
return alias;
case QUES:
alias = "?";
lexer.nextToken();
default:
break;
}
}
if (lexer.token() == Token.KEY || lexer.token() == Token.CASE) {
alias = lexer.token.name();
lexer.nextToken();
return alias;
}
switch (lexer.token()) {
case KEY:
alias = lexer.token().name();
if (alias != null) {
while (lexer.token() == Token.DOT) {
lexer.nextToken();
return alias;
default:
break;
alias += ('.' + lexer.token().name());
lexer.nextToken();
}
return alias;
}
if (lexer.token() == Token.LPAREN) {
return null;
}