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Code Issues Releases Wiki Activity

refactor sql parser. sqlite support limit clause. #1556

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This commit is contained in:
wenshao
2016-12-26 20:11:49 +08:00
parent 74b456d659
commit 77bfab01f5
32 changed files with 396 additions and 270 deletions
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src/main/java/com/alibaba/druid/sql/parser/SQLExprParser.java
+25 -10
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@@ -20,16 +20,7 @@ import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import com.alibaba.druid.sql.ast.SQLCommentHint;
import com.alibaba.druid.sql.ast.SQLDataType;
import com.alibaba.druid.sql.ast.SQLDataTypeImpl;
import com.alibaba.druid.sql.ast.SQLExpr;
import com.alibaba.druid.sql.ast.SQLName;
import com.alibaba.druid.sql.ast.SQLObject;
import com.alibaba.druid.sql.ast.SQLOrderBy;
import com.alibaba.druid.sql.ast.SQLOrderingSpecification;
import com.alibaba.druid.sql.ast.SQLOver;
import com.alibaba.druid.sql.ast.SQLPartitionValue;
import com.alibaba.druid.sql.ast.*;
import com.alibaba.druid.sql.ast.expr.*;
import com.alibaba.druid.sql.ast.statement.SQLNotNullConstraint;
import com.alibaba.druid.sql.ast.statement.SQLNullConstraint;
@@ -2202,4 +2193,28 @@ public class SQLExprParser extends SQLParser {
}
return false;
}
public SQLLimit parseLimit() {
if (lexer.token() == Token.LIMIT) {
lexer.nextToken();
SQLLimit limit = new SQLLimit();
SQLExpr temp = this.expr();
if (lexer.token() == (Token.COMMA)) {
limit.setOffset(temp);
lexer.nextToken();
limit.setRowCount(this.expr());
} else if (identifierEquals("OFFSET")) {
limit.setRowCount(temp);
lexer.nextToken();
limit.setOffset(this.expr());
} else {
limit.setRowCount(temp);
}
return limit;
}
return null;
}
}