[teiid-commits] teiid SVN: r4170 - in trunk: connectors/translator-jdbc/src/main/java/org/teiid/translator/jdbc/oracle and 1 other directories.
teiid-commits at lists.jboss.org
teiid-commits at lists.jboss.org
Sat Jun 9 21:01:16 EDT 2012
Author: shawkins
Date: 2012-06-09 21:01:14 -0400 (Sat, 09 Jun 2012)
New Revision: 4170
Modified:
trunk/api/src/main/java/org/teiid/language/visitor/SQLStringVisitor.java
trunk/connectors/translator-jdbc/src/main/java/org/teiid/translator/jdbc/oracle/OracleExecutionFactory.java
trunk/connectors/translator-jdbc/src/test/java/org/teiid/translator/jdbc/oracle/TestOracleTranslator.java
Log:
TEIID-2069 added logic to remove the limit clause if the dual table is used
Modified: trunk/api/src/main/java/org/teiid/language/visitor/SQLStringVisitor.java
===================================================================
--- trunk/api/src/main/java/org/teiid/language/visitor/SQLStringVisitor.java 2012-06-08 13:49:43 UTC (rev 4169)
+++ trunk/api/src/main/java/org/teiid/language/visitor/SQLStringVisitor.java 2012-06-10 01:01:14 UTC (rev 4170)
@@ -61,7 +61,11 @@
* @return the name of that element or group as defined in the source
*/
protected String getName(AbstractMetadataRecord object) {
- String nameInSource = object.getNameInSource();
+ return getRecordName(object);
+ }
+
+ public static String getRecordName(AbstractMetadataRecord object) {
+ String nameInSource = object.getNameInSource();
if(nameInSource != null && nameInSource.length() > 0) {
return nameInSource;
}
Modified: trunk/connectors/translator-jdbc/src/main/java/org/teiid/translator/jdbc/oracle/OracleExecutionFactory.java
===================================================================
--- trunk/connectors/translator-jdbc/src/main/java/org/teiid/translator/jdbc/oracle/OracleExecutionFactory.java 2012-06-08 13:49:43 UTC (rev 4169)
+++ trunk/connectors/translator-jdbc/src/main/java/org/teiid/translator/jdbc/oracle/OracleExecutionFactory.java 2012-06-10 01:01:14 UTC (rev 4170)
@@ -36,9 +36,11 @@
import java.util.List;
import org.teiid.language.*;
+import org.teiid.language.Comparison.Operator;
import org.teiid.language.SQLConstants.Tokens;
import org.teiid.language.SetQuery.Operation;
import org.teiid.language.visitor.CollectorVisitor;
+import org.teiid.language.visitor.SQLStringVisitor;
import org.teiid.logging.LogConstants;
import org.teiid.logging.LogManager;
import org.teiid.metadata.AbstractMetadataRecord;
@@ -285,6 +287,21 @@
}
Limit limit = queryCommand.getLimit();
queryCommand.setLimit(null);
+
+ if (command instanceof Select) {
+ Select select = (Select)command;
+
+ TableReference tr = select.getFrom().get(0);
+ if (tr instanceof NamedTable && isDual((NamedTable)tr)) {
+ if (limit.getRowOffset() > 0 || limit.getRowLimit() == 0) {
+ //no data
+ select.setWhere(new Comparison(new Literal(1, TypeFacility.RUNTIME_TYPES.INTEGER), new Literal(0, TypeFacility.RUNTIME_TYPES.INTEGER), Operator.EQ));
+ return null;
+ }
+ return null; //dual does not allow a limit
+ }
+ }
+
List<Object> parts = new ArrayList<Object>();
parts.add("SELECT "); //$NON-NLS-1$
/*
@@ -327,7 +344,18 @@
}
return parts;
}
-
+
+ private boolean isDual(NamedTable table) {
+ String groupName = null;
+ AbstractMetadataRecord groupID = table.getMetadataObject();
+ if(groupID != null) {
+ groupName = SQLStringVisitor.getRecordName(groupID);
+ } else {
+ groupName = table.getName();
+ }
+ return DUAL.equalsIgnoreCase(groupName);
+ }
+
@Override
public boolean useAsInGroupAlias(){
return false;
@@ -506,14 +534,7 @@
private void stripDualAlias(NamedTable table) {
if (table.getCorrelationName() != null) {
- String groupName = null;
- AbstractMetadataRecord groupID = table.getMetadataObject();
- if(groupID != null) {
- groupName = getName(groupID);
- } else {
- groupName = table.getName();
- }
- if (DUAL.equalsIgnoreCase(groupName)) {
+ if (isDual(table)) {
table.setCorrelationName(null);
}
}
Modified: trunk/connectors/translator-jdbc/src/test/java/org/teiid/translator/jdbc/oracle/TestOracleTranslator.java
===================================================================
--- trunk/connectors/translator-jdbc/src/test/java/org/teiid/translator/jdbc/oracle/TestOracleTranslator.java 2012-06-08 13:49:43 UTC (rev 4169)
+++ trunk/connectors/translator-jdbc/src/test/java/org/teiid/translator/jdbc/oracle/TestOracleTranslator.java 2012-06-10 01:01:14 UTC (rev 4170)
@@ -664,6 +664,28 @@
null,
output);
}
+
+ @Test public void testDUALLimit() throws Exception {
+ String input = "SELECT something FROM DUAL as g0 LIMIT 2"; //$NON-NLS-1$
+ String output = "SELECT seq.nextval FROM DUAL"; //$NON-NLS-1$
+
+ helpTestVisitor(getOracleSpecificMetadata(),
+ input,
+ EMPTY_CONTEXT,
+ null,
+ output);
+ }
+
+ @Test public void testDUALLimit1() throws Exception {
+ String input = "SELECT something FROM DUAL as g0 LIMIT 1, 2"; //$NON-NLS-1$
+ String output = "SELECT seq.nextval FROM DUAL WHERE 1 = 0"; //$NON-NLS-1$
+
+ helpTestVisitor(getOracleSpecificMetadata(),
+ input,
+ EMPTY_CONTEXT,
+ null,
+ output);
+ }
/**
* Test Oracle's rownum pseudo-column. Not a real column, so it can't
More information about the teiid-commits
mailing list