public void deParse(Update update) {
buffer
.append("UPDATE ")
.append(PlainSelect.getStringList(update.getTables(), true, false))
.append(" SET ");
for (int i = 0; i < update.getColumns().size(); i++) {
Column column = update.getColumns().get(i);
buffer.append(column.getFullyQualifiedName()).append(" = ");
Expression expression = update.getExpressions().get(i);
expression.accept(expressionVisitor);
if (i < update.getColumns().size() - 1) {
buffer.append(", ");
}
}
if (update.getFromItem() != null) {
buffer.append(" FROM ").append(update.getFromItem());
if (update.getJoins() != null) {
for (Join join : update.getJoins()) {
if (join.isSimple()) {
buffer.append(", ").append(join);
} else {
buffer.append(" ").append(join);
}
}
}
}
if (update.getWhere() != null) {
buffer.append(" WHERE ");
update.getWhere().accept(expressionVisitor);
}
}
/**
* 静态调用接口，获取所有表的ID
*
* @param sql 传入的sql语句
* @return 返回-1表示当前语句不是select语句，返回0表示当前SQL有问题，返回>0的数字表示查找出的表数目
*/
public static int getOriginalTableName(String sql) {
int num_Table = 0;
Statement statement = null;
try {
statement = CCJSqlParserUtil.parse(sql);
if (statement instanceof Select) {
Select selectStatement = (Select) statement;
System.err.println(sql);
PlainSelect plainSelect = null;
plainSelect = (PlainSelect) selectStatement.getSelectBody();
if (plainSelect != null) {
System.out.println("\n-------------------------------------------");
if (plainSelect.getFromItem() != null) {
plainSelect.getFromItem().toString();
num_Table++;
}
System.out.print(plainSelect.getFromItem().toString() + "\t");
if (plainSelect.getJoins() != null) {
for (Join join2 : plainSelect.getJoins()) {
System.out.print(join2.toString() + "\t");
num_Table++;
}
}
System.out.println("\n-------------------------------------------");
} else {
num_Table = -1;
return num_Table;
}
}
} catch (JSQLParserException ex) {
ex.printStackTrace();
num_Table = 0;
LogWriter.println(num_Table);
return num_Table;
}
LogWriter.println("共统计出表个数=>" + num_Table);
return num_Table;
}
/** @brief The following functions override functions of the interfaces. */
public void visit(PlainSelect plainSelect) throws Exception {
if (plainSelect.getFromItem() != null) {
if (plainSelect.getFromItem().getAlias() != null) {
this.aliasTableNameList.add(plainSelect.getFromItem().getAlias().getName());
}
plainSelect.getFromItem().accept(this);
}
if (plainSelect.getJoins() != null) {
for (Iterator joinsIt = plainSelect.getJoins().iterator(); joinsIt.hasNext(); ) {
Join join = (Join) joinsIt.next();
if (join.getRightItem().getAlias() != null) {
this.aliasTableNameList.add(join.getRightItem().getAlias().getName());
}
if (join.getOnExpression() != null) {
join.getOnExpression().accept(this);
}
join.getRightItem().accept(this);
}
}
// Select selectItem From fromItem, joinItem Where whereClause.
if (plainSelect.getSelectItems() != null) {
for (SelectItem selectItem : plainSelect.getSelectItems()) {
selectItem.accept(this);
}
}
if (plainSelect.getWhere() != null) {
plainSelect.getWhere().accept(this);
}
if (plainSelect.getGroupByColumnReferences() != null) {
for (Iterator groupByIt = plainSelect.getGroupByColumnReferences().iterator();
groupByIt.hasNext(); ) {
Expression groupBy = (Expression) groupByIt.next();
groupBy.accept(this);
}
}
if (plainSelect.getClusterByElements() != null) {
for (Iterator clusterByit = plainSelect.getClusterByElements().iterator();
clusterByit.hasNext(); ) {
ClusterByElement clusterByElement = (ClusterByElement) clusterByit.next();
visit(clusterByElement);
}
}
if (plainSelect.getDistributeByElements() != null) {
for (Iterator distributeByIt = plainSelect.getDistributeByElements().iterator();
distributeByIt.hasNext(); ) {
DistributeByElement distributeByElement = (DistributeByElement) distributeByIt.next();
visit(distributeByElement);
}
}
if (plainSelect.getOrderByElements() != null) {
for (Iterator orderByIt = plainSelect.getOrderByElements().iterator();
orderByIt.hasNext(); ) {
OrderByElement orderByElement = (OrderByElement) orderByIt.next();
orderByElement.accept(this);
}
}
if (plainSelect.getSortByElements() != null) {
for (Iterator sortByIt = plainSelect.getSortByElements().iterator(); sortByIt.hasNext(); ) {
SortByElement sortByElement = (SortByElement) sortByIt.next();
visit(sortByElement);
}
}
if (plainSelect.getHaving() != null) {
plainSelect.getHaving().accept(this);
}
}
