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Code Issues Releases Wiki Activity

improved sql parser.

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This commit is contained in:
wenshao
2016-10-20 15:59:10 +08:00
parent f66c08fb51
commit cc58cf8be9
9 changed files with 126 additions and 8 deletions
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src/main/java/com/alibaba/druid/sql/SQLUtils.java
+27 -5
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@@ -47,17 +47,14 @@ import com.alibaba.druid.sql.dialect.postgresql.visitor.PGOutputVisitor;
import com.alibaba.druid.sql.dialect.postgresql.visitor.PGSchemaStatVisitor;
import com.alibaba.druid.sql.dialect.sqlserver.visitor.SQLServerOutputVisitor;
import com.alibaba.druid.sql.dialect.sqlserver.visitor.SQLServerSchemaStatVisitor;
import com.alibaba.druid.sql.parser.ParserException;
import com.alibaba.druid.sql.parser.SQLExprParser;
import com.alibaba.druid.sql.parser.SQLParserUtils;
import com.alibaba.druid.sql.parser.SQLStatementParser;
import com.alibaba.druid.sql.parser.Token;
import com.alibaba.druid.sql.parser.*;
import com.alibaba.druid.sql.visitor.SQLASTOutputVisitor;
import com.alibaba.druid.sql.visitor.SchemaStatVisitor;
import com.alibaba.druid.support.logging.Log;
import com.alibaba.druid.support.logging.LogFactory;
import com.alibaba.druid.util.JdbcConstants;
import com.alibaba.druid.util.StringUtils;
import com.alibaba.druid.util.Utils;
public class SQLUtils {
public static FormatOption DEFAULT_FORMAT_OPTION = new FormatOption();
@@ -669,5 +666,30 @@ public class SQLUtils {
return false;
}
public static long hash(String sql, String dbType) {
Lexer lexer = SQLParserUtils.createLexer(sql, dbType);
StringBuilder buf = new StringBuilder(sql.length());
for (;;) {
lexer.nextToken();
Token token = lexer.token();
if (token == Token.EOF) {
break;
}
if (token == Token.ERROR) {
return Utils.murmurhash2_64(sql);
}
if (buf.length() != 0) {
}
}
return buf.hashCode();
}
}