/**
* Method to return the SQLText for an UPDATE TABLE statement. Returns the SQLText for <code>
* UPDATE T1 SET x1 = val1, x2 = val2 FROM MYTBL T1</code>. Override if the datastore doesn't
* support that standard syntax.
*
* @param tbl The primary table
* @param setSQL The SQLText for the SET component
* @return SQLText for the update statement
*/
public SQLText getUpdateTableStatement(SQLTable tbl, SQLText setSQL) {
SQLText sql = new SQLText("UPDATE ").append(tbl.getAlias().toString()); // "UPDATE T1"
sql.append(" ").append(setSQL); // " SET x1 = val1, x2 = val2"
sql.append(" FROM ").append(tbl.toString()); // " FROM MYTBL T1"
return sql;
}
/**
* Method to return an expression for Map.containsValue using INNER JOIN to the element. This is
* only for use when there are no "!containsValue" and no "OR" operations. Creates SQL by adding
* INNER JOIN to the join table (where it exists), and also to the value table adding an AND
* condition on the value (with value of the valueExpr). Returns a BooleanExpression "TRUE" (since
* the INNER JOIN will guarantee if the value is contained of not).
*
* @param mapExpr Map expression
* @param valExpr Expression for the value
* @return Contains expression
*/
protected SQLExpression containsAsInnerJoin(MapExpression mapExpr, SQLExpression valExpr) {
boolean valIsUnbound = (valExpr instanceof UnboundExpression);
String varName = null;
String valAlias = null;
if (valIsUnbound) {
varName = ((UnboundExpression) valExpr).getVariableName();
NucleusLogger.QUERY.debug(
"map.containsValue("
+ valExpr
+ ") binding unbound variable "
+ varName
+ " using INNER JOIN");
// TODO What if the variable is declared as a subtype, handle this see
// CollectionContainsMethod
} else if (!stmt.getQueryGenerator().hasExplicitJoins()) {
JoinType joinType = stmt.getJoinTypeForTable(valExpr.getSQLTable());
if (joinType == JoinType.CROSS_JOIN) {
// Value is currently joined via CROSS JOIN, so remove it (and use INNER JOIN below)
valAlias = stmt.removeCrossJoin(valExpr.getSQLTable());
valIsUnbound = true;
NucleusLogger.QUERY.debug(
"map.containsValue("
+ valExpr
+ ") was previously bound as CROSS JOIN but changing to INNER JOIN");
}
// TODO If owner is joined via CROSS JOIN and value is already present then remove CROSS JOIN
// and join via INNER JOIN
}
RDBMSStoreManager storeMgr = stmt.getRDBMSManager();
MetaDataManager mmgr = storeMgr.getMetaDataManager();
AbstractMemberMetaData mmd = mapExpr.getJavaTypeMapping().getMemberMetaData();
AbstractClassMetaData valCmd = mmd.getMap().getValueClassMetaData(clr, mmgr);
if (mmd.getMap().getMapType() == MapType.MAP_TYPE_JOIN) {
// Map formed in join table - add join to join table, then to value table (if present)
MapTable mapTbl = (MapTable) storeMgr.getTable(mmd);
SQLTable joinSqlTbl =
stmt.innerJoin(
mapExpr.getSQLTable(),
mapExpr.getSQLTable().getTable().getIdMapping(),
mapTbl,
null,
mapTbl.getOwnerMapping(),
null,
null);
if (valCmd != null) {
if (valIsUnbound) {
DatastoreClass valTbl = storeMgr.getDatastoreClass(valCmd.getFullClassName(), clr);
SQLTable valSqlTbl =
stmt.innerJoin(
joinSqlTbl,
mapTbl.getValueMapping(),
valTbl,
valAlias,
valTbl.getIdMapping(),
null,
null);
// Bind the variable in the QueryGenerator
valExpr = exprFactory.newExpression(stmt, valSqlTbl, valSqlTbl.getTable().getIdMapping());
stmt.getQueryGenerator()
.bindVariable(varName, valCmd, valExpr.getSQLTable(), valExpr.getJavaTypeMapping());
} else {
// Add restrict to value
SQLExpression valIdExpr =
exprFactory.newExpression(stmt, joinSqlTbl, mapTbl.getValueMapping());
stmt.whereAnd(valIdExpr.eq(valExpr), true);
}
} else {
if (valIsUnbound) {
// Bind the variable in the QueryGenerator
valExpr = exprFactory.newExpression(stmt, joinSqlTbl, mapTbl.getValueMapping());
stmt.getQueryGenerator()
.bindVariable(varName, null, valExpr.getSQLTable(), valExpr.getJavaTypeMapping());
} else {
// Add restrict to value
SQLExpression valIdExpr =
exprFactory.newExpression(stmt, joinSqlTbl, mapTbl.getValueMapping());
stmt.whereAnd(valIdExpr.eq(valExpr), true);
}
}
} else if (mmd.getMap().getMapType() == MapType.MAP_TYPE_KEY_IN_VALUE) {
// Map formed in value table - add join to value table
DatastoreClass valTbl = storeMgr.getDatastoreClass(valCmd.getFullClassName(), clr);
JavaTypeMapping ownerMapping = null;
if (mmd.getMappedBy() != null) {
ownerMapping = valTbl.getMemberMapping(valCmd.getMetaDataForMember(mmd.getMappedBy()));
} else {
ownerMapping = valTbl.getExternalMapping(mmd, MappingConsumer.MAPPING_TYPE_EXTERNAL_FK);
}
SQLTable valSqlTbl =
stmt.innerJoin(
mapExpr.getSQLTable(),
mapExpr.getSQLTable().getTable().getIdMapping(),
valTbl,
valAlias,
ownerMapping,
null,
null);
if (valIsUnbound) {
// Bind the variable in the QueryGenerator
valExpr = exprFactory.newExpression(stmt, valSqlTbl, valTbl.getIdMapping());
stmt.getQueryGenerator()
.bindVariable(varName, valCmd, valExpr.getSQLTable(), valExpr.getJavaTypeMapping());
} else {
// Add restrict to value
SQLExpression valIdExpr = exprFactory.newExpression(stmt, valSqlTbl, valTbl.getIdMapping());
stmt.whereAnd(valIdExpr.eq(valExpr), true);
}
} else if (mmd.getMap().getMapType() == MapType.MAP_TYPE_VALUE_IN_KEY) {
// Map formed in key table - add join to key table then to value table
AbstractClassMetaData keyCmd = mmd.getMap().getKeyClassMetaData(clr, mmgr);
DatastoreClass keyTbl = storeMgr.getDatastoreClass(keyCmd.getFullClassName(), clr);
AbstractMemberMetaData keyValMmd =
keyCmd.getMetaDataForMember(mmd.getValueMetaData().getMappedBy());
JavaTypeMapping ownerMapping = null;
if (mmd.getMappedBy() != null) {
ownerMapping = keyTbl.getMemberMapping(keyCmd.getMetaDataForMember(mmd.getMappedBy()));
} else {
ownerMapping = keyTbl.getExternalMapping(mmd, MappingConsumer.MAPPING_TYPE_EXTERNAL_FK);
}
SQLTable keySqlTbl =
stmt.innerJoin(
mapExpr.getSQLTable(),
mapExpr.getSQLTable().getTable().getIdMapping(),
keyTbl,
null,
ownerMapping,
null,
null);
if (valCmd != null) {
DatastoreClass valTbl = storeMgr.getDatastoreClass(valCmd.getFullClassName(), clr);
SQLTable valSqlTbl =
stmt.innerJoin(
keySqlTbl,
keyTbl.getMemberMapping(keyValMmd),
valTbl,
valAlias,
valTbl.getIdMapping(),
null,
null);
if (valIsUnbound) {
// Bind the variable in the QueryGenerator
valExpr = exprFactory.newExpression(stmt, valSqlTbl, valTbl.getIdMapping());
stmt.getQueryGenerator()
.bindVariable(varName, valCmd, valExpr.getSQLTable(), valExpr.getJavaTypeMapping());
} else {
// Add restrict to value
SQLExpression valIdExpr =
exprFactory.newExpression(stmt, valSqlTbl, valTbl.getIdMapping());
stmt.whereAnd(valIdExpr.eq(valExpr), true);
}
} else {
if (valIsUnbound) {
// Bind the variable in the QueryGenerator
valExpr = exprFactory.newExpression(stmt, keySqlTbl, keyTbl.getMemberMapping(keyValMmd));
stmt.getQueryGenerator()
.bindVariable(varName, null, valExpr.getSQLTable(), valExpr.getJavaTypeMapping());
} else {
// Add restrict to value
SQLExpression valIdExpr =
exprFactory.newExpression(stmt, keySqlTbl, keyTbl.getMemberMapping(keyValMmd));
stmt.whereAnd(valIdExpr.eq(valExpr), true);
}
}
}
JavaTypeMapping m = exprFactory.getMappingForType(boolean.class, true);
return exprFactory.newLiteral(stmt, m, true).eq(exprFactory.newLiteral(stmt, m, true));
}
/**
* Method to return the basic SQL for a DELETE TABLE statement. Returns the String as <code>
* DELETE MYTABLE FROM MYTABLE t1</code>.
*
* @param tbl The SQLTable to delete
* @return The delete table string
*/
public String getDeleteTableStatement(SQLTable tbl) {
return "DELETE " + tbl.getAlias() + " FROM " + tbl.toString();
}
