strongduanmu commented on a change in pull request #7704:
URL: https://github.com/apache/shardingsphere/pull/7704#discussion_r501033363
##########
File path:
shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/visitor/impl/MySQLDDLVisitor.java
##########
@@ -461,92 +483,256 @@ public ASTNode visitKeyParts_(final KeyParts_Context
ctx) {
}
return result;
}
-
+
@Override
public ASTNode visitCreateProcedure(final CreateProcedureContext ctx) {
- return new MySQLCreateProcedureStatement();
+ MySQLCreateProcedureStatement result = new
MySQLCreateProcedureStatement();
+ result.setRoutineBody((RoutineBodySegment) visit(ctx.routineBody()));
+ return result;
}
-
+
@Override
public ASTNode visitAlterProcedure(final AlterProcedureContext ctx) {
return new MySQLAlterProcedureStatement();
}
-
+
@Override
public ASTNode visitDropProcedure(final DropProcedureContext ctx) {
return new MySQLDropProcedureStatement();
}
-
+
@Override
public ASTNode visitCreateFunction(final CreateFunctionContext ctx) {
- return new MySQLCreateFunctionStatement();
+ MySQLCreateFunctionStatement result = new
MySQLCreateFunctionStatement();
+ result.setRoutineBody((RoutineBodySegment) visit(ctx.routineBody()));
+ return result;
}
-
+
+ @SuppressWarnings("unchecked")
+ @Override
+ public ASTNode visitRoutineBody(final RoutineBodyContext ctx) {
+ RoutineBodySegment result = new
RoutineBodySegment(ctx.start.getStartIndex(), ctx.stop.getStopIndex());
+ CollectionValue<ValidStatementSegment> validStatements;
+ if (null != ctx.simpleStatement()) {
+ validStatements = (CollectionValue<ValidStatementSegment>)
visit(ctx.simpleStatement());
+ } else {
+ validStatements = (CollectionValue<ValidStatementSegment>)
visit(ctx.compoundStatement());
+ }
+ result.getValidStatements().addAll(validStatements.getValue());
+ return result;
+ }
+
+ @Override
+ public ASTNode visitSimpleStatement(final SimpleStatementContext ctx) {
+ return visit(ctx.validStatement());
+ }
+
+ @Override
+ public ASTNode visitCompoundStatement(final CompoundStatementContext ctx) {
+ return visit(ctx.beginStatement());
+ }
+
+ @SuppressWarnings("unchecked")
+ @Override
+ public ASTNode visitBeginStatement(final BeginStatementContext ctx) {
+ CollectionValue<ValidStatementSegment> result = new
CollectionValue<>();
+ for (ValidStatementContext each : ctx.validStatement()) {
+ result.combine((CollectionValue<ValidStatementSegment>)
visit(each));
+ }
+ return result;
+ }
+
+ @SuppressWarnings("unchecked")
+ @Override
+ public ASTNode visitValidStatement(final ValidStatementContext ctx) {
+ CollectionValue<ValidStatementSegment> result = new
CollectionValue<>();
+ ValidStatementSegment validStatement = new
ValidStatementSegment(ctx.start.getStartIndex(), ctx.stop.getStopIndex());
+ if (null != ctx.createTable()) {
+ validStatement.setCreateTable((MySQLCreateTableStatement)
visit(ctx.createTable()));
+ result.getValue().add(validStatement);
+ } else if (null != ctx.alterTable()) {
+ validStatement.setAlterTable((MySQLAlterTableStatement)
visit(ctx.alterTable()));
+ result.getValue().add(validStatement);
+ } else if (null != ctx.dropTable()) {
+ validStatement.setDropTable((MySQLDropTableStatement)
visit(ctx.dropTable()));
+ result.getValue().add(validStatement);
+ } else if (null != ctx.truncateTable()) {
+ validStatement.setTruncate((MySQLTruncateStatement)
visit(ctx.truncateTable()));
+ result.getValue().add(validStatement);
+ }
+ if (null != ctx.validDMLStatement()) {
+ result.combine((CollectionValue<ValidStatementSegment>)
visit(ctx.validDMLStatement()));
+ }
+ if (null != ctx.beginStatement()) {
+ result.combine((CollectionValue<ValidStatementSegment>)
visit(ctx.beginStatement()));
+ }
+ if (null != ctx.flowControlStatement()) {
+ result.combine((CollectionValue<ValidStatementSegment>)
visit(ctx.flowControlStatement()));
+ }
+ return result;
+ }
+
+ @Override
+ public ASTNode visitValidDMLStatement(final ValidDMLStatementContext ctx) {
+ CollectionValue<ValidStatementSegment> result = new
CollectionValue<>();
+ ValidStatementSegment validStatement = new
ValidStatementSegment(ctx.start.getStartIndex(), ctx.stop.getStopIndex());
+ if (null != ctx.insert()) {
+ validStatement.setInsert((MySQLInsertStatement)
createParseTreeVisitor(ctx.insert().getClass()).visit(ctx.insert()));
+ } else if (null != ctx.replace()) {
+ validStatement.setReplace((MySQLInsertStatement)
createParseTreeVisitor(ctx.replace().getClass()).visit(ctx.replace()));
+ } else if (null != ctx.update()) {
+ validStatement.setUpdate((MySQLUpdateStatement)
createParseTreeVisitor(ctx.update().getClass()).visit(ctx.update()));
+ } else if (null != ctx.delete()) {
+ validStatement.setDelete((MySQLDeleteStatement)
createParseTreeVisitor(ctx.delete().getClass()).visit(ctx.delete()));
+ } else if (null != ctx.select()) {
+ validStatement.setSelect((MySQLSelectStatement)
createParseTreeVisitor(ctx.select().getClass()).visit(ctx.select()));
+ }
+ result.getValue().add(validStatement);
+ return result;
+ }
+
+ @SuppressWarnings("rawtypes")
+ private ParseTreeVisitor createParseTreeVisitor(final Class<? extends
ParseTree> parseTreeClass) {
Review comment:
> if `MySQLDMLVisitor` is necessary, do you think moving the content of
`MySQLDMLVisitor` to `MySQLVisitor` will be better than
`createParseTreeVisitor`?
@tristaZero The stored routine supports a variety of DML and DAL statements,
and migrating the implementation of these statements to the `MySQLVisitor`
would cause the `MySQLVisitor` to become bloated.
In addition, the `MySQLVisitor` seems to be more suited to processing some
generic syntax fragments than the entire statement.
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