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Code Issues Releases Wiki Activity

improved sql parser.

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This commit is contained in:
wenshao
2017-09-28 09:39:01 +08:00
parent aa957fab13
commit 6277b490bd
166 changed files with 2030 additions and 446 deletions
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src/main/java/com/alibaba/druid/sql/SQLTransformUtils.java
+49 -1
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@@ -23,7 +23,6 @@ import com.alibaba.druid.sql.ast.statement.*;
import com.alibaba.druid.sql.dialect.oracle.ast.expr.OracleSysdateExpr;
import com.alibaba.druid.sql.dialect.oracle.ast.stmt.*;
import com.alibaba.druid.util.FnvHash;
import oracle.jdbc.rowset.OracleJoinable;
import java.util.List;
@@ -553,6 +552,8 @@ public class SQLTransformUtils {
SQLExpr arg0 = argumentns.get(0);
if (arg0 instanceof SQLNumericLiteralExpr) {
len = ((SQLNumericLiteralExpr) arg0).getNumber().intValue();
} else if (arg0 instanceof SQLVariantRefExpr) {
len = 2000;
} else {
throw new UnsupportedOperationException(SQLUtils.toOracleString(x));
}
@@ -680,6 +681,53 @@ public class SQLTransformUtils {
return xx;
}
if (nameHashCode64 == FnvHash.Constants.USERENV) {
if (x.getParameters().size() == 1) {
SQLExpr param0 = x.getParameters().get(0);
if (param0 instanceof SQLCharExpr) {
String text = ((SQLCharExpr) param0).getText();
if ("SESSIONID".equalsIgnoreCase(text)) {
SQLMethodInvokeExpr xx = new SQLMethodInvokeExpr();
xx.setMethodName("get_session_id");
xx.setParent(x.getParent());
return xx;
}
}
}
}
if (nameHashCode64 == FnvHash.Constants.USERENV) {
if (x.getParameters().size() == 1) {
SQLExpr param0 = x.getParameters().get(0);
if (param0 instanceof SQLCharExpr) {
String text = ((SQLCharExpr) param0).getText();
if ("SESSIONID".equalsIgnoreCase(text)) {
SQLMethodInvokeExpr xx = new SQLMethodInvokeExpr();
xx.setMethodName("get_session_id");
xx.setParent(x.getParent());
return xx;
}
}
}
}
if (nameHashCode64 == FnvHash.Constants.NUMTODSINTERVAL) {
if (x.getParameters().size() == 2) {
SQLExpr param0 = x.getParameters().get(0);
SQLExpr param1 = x.getParameters().get(1);
if (param0 instanceof SQLIntegerExpr && param1 instanceof SQLCharExpr) {
String text = ((SQLCharExpr) param1).getText();
if ("DAY".equalsIgnoreCase(text)) {
SQLIntervalExpr intervalExpr = new SQLIntervalExpr();
intervalExpr.setValue(new SQLCharExpr(param0.toString() + " DAYS"));
intervalExpr.setParent(x.getParent());
return intervalExpr;
}
}
}
}
return x;
}