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Code Issues Releases Wiki Activity

improve sql parser performance

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This commit is contained in:
wenshao
2013-01-14 20:45:13 +08:00
parent cb45e49a0c
commit 7aa2038498
6 changed files with 71 additions and 21 deletions
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src/test/java/com/alibaba/druid/benckmark/sql/MySqlPerfMain_select.java
+14 -12
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@@ -20,9 +20,8 @@ import java.util.List;
import com.alibaba.druid.sql.ast.SQLStatement;
import com.alibaba.druid.sql.dialect.mysql.parser.MySqlStatementParser;
import com.alibaba.druid.sql.dialect.mysql.visitor.MySqlOutputVisitor;
import com.alibaba.druid.sql.dialect.mysql.visitor.MySqlASTVisitorAdapter;
import com.alibaba.druid.sql.test.TestUtils;
import com.alibaba.druid.util.IOUtils;
public class MySqlPerfMain_select {
@@ -30,9 +29,9 @@ public class MySqlPerfMain_select {
System.out.println(System.getProperty("java.vm.name") + " " + System.getProperty("java.runtime.version"));
List<String> arguments = ManagementFactory.getRuntimeMXBean().getInputArguments();
System.out.println(arguments);
String sql = "SELECT ID, NAME, AGE FROM USER WHERE ID = ?";
for (int i = 0; i < 10; ++i) {
perfMySql(sql);
}
@@ -57,15 +56,18 @@ public class MySqlPerfMain_select {
return millis;
}
static String execMySql(String sql) {
StringBuilder out = new StringBuilder();
MySqlOutputVisitor visitor = new MySqlOutputVisitor(out);
static void execMySql(String sql) {
MySqlStatementParser parser = new MySqlStatementParser(sql);
List<SQLStatement> statementList = parser.parseStatementList();
// for (SQLStatement statement : statementList) {
// statement.accept(visitor);
// visitor.println();
// }
return out.toString();
// StringBuilder out = new StringBuilder();
// MySqlOutputVisitor visitor = new MySqlOutputVisitor(out);
// MySqlASTVisitorAdapter visitor = new MySqlASTVisitorAdapter();
//
// for (SQLStatement statement : statementList) {
// statement.accept(visitor);
// }
// out.toString();
}
}