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Code Issues Releases Wiki Activity

mysql parser support Hierarchical clause.

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This commit is contained in:
wenshao
2017-04-24 00:39:18 +08:00
parent 915854c7c8
commit d3bacf9e70
13 changed files with 176 additions and 88 deletions
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src/main/java/com/alibaba/druid/sql/parser/SQLSelectParser.java
+52 -1
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@@ -448,7 +448,7 @@ public class SQLSelectParser extends SQLParser {
if ((tableSource.getAlias() == null) || (tableSource.getAlias().length() == 0)) {
if (lexer.token() != Token.LEFT && lexer.token() != Token.RIGHT && lexer.token() != Token.FULL
&& !identifierEquals("STRAIGHT_JOIN") && !identifierEquals("CROSS") && lexer.token != Token.OUTER) {
String alias = as();
String alias = tableAlias();
if (alias != null) {
tableSource.setAlias(alias);
return parseTableSourceRest(tableSource);
@@ -589,4 +589,55 @@ public class SQLSelectParser extends SQLParser {
}
}
}
protected void parseHierachical(SQLSelectQueryBlock queryBlock) {
if (lexer.token() == Token.CONNECT || identifierEquals("CONNECT")) {
lexer.nextToken();
accept(Token.BY);
if (lexer.token() == Token.PRIOR || identifierEquals("PRIOR")) {
lexer.nextToken();
queryBlock.setPrior(true);
}
if (identifierEquals("NOCYCLE")) {
queryBlock.setNoCycle(true);
lexer.nextToken();
if (lexer.token() == Token.PRIOR) {
lexer.nextToken();
queryBlock.setPrior(true);
}
}
queryBlock.setConnectBy(this.exprParser.expr());
}
if (lexer.token() == Token.START || identifierEquals("START")) {
lexer.nextToken();
accept(Token.WITH);
queryBlock.setStartWith(this.exprParser.expr());
}
if (lexer.token() == Token.CONNECT || identifierEquals("CONNECT")) {
lexer.nextToken();
accept(Token.BY);
if (lexer.token() == Token.PRIOR || identifierEquals("PRIOR")) {
lexer.nextToken();
queryBlock.setPrior(true);
}
if (identifierEquals("NOCYCLE")) {
queryBlock.setNoCycle(true);
lexer.nextToken();
if (lexer.token() == Token.PRIOR || identifierEquals("PRIOR")) {
lexer.nextToken();
queryBlock.setPrior(true);
}
}
queryBlock.setConnectBy(this.exprParser.expr());
}
}
}