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[inner-2340] fix: explain' lost connection.... #3863

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merged 1 commit into from
Feb 5, 2024
Merged

[inner-2340] fix: explain' lost connection.... #3863

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31 changes: 20 additions & 11 deletions src/main/java/com/actiontech/dble/server/handler/ExplainHandler.java
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Original file line number Diff line number Diff line change
Expand Up @@ -48,6 +48,7 @@
import java.sql.SQLException;
import java.sql.SQLNonTransientException;
import java.sql.SQLSyntaxErrorException;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;

Expand Down Expand Up @@ -243,6 +244,7 @@ private static RouteResultsetNode getTryRouteSingleNode(BaseHandlerBuilder build
}

public static void writeOutHeadAndEof(ShardingService service, RouteResultset rrs) {
final List<RowDataPacket> rows = getRows(service, rrs);
ByteBuffer buffer = service.allocate();
// writeDirectly header
ResultSetHeaderPacket header = PacketUtil.getHeader(FIELD_COUNT);
Expand All @@ -260,20 +262,30 @@ public static void writeOutHeadAndEof(ShardingService service, RouteResultset rr
eof.setPacketId(service.nextPacketId());
buffer = eof.write(buffer, service, true);

// writeDirectly rows
for (RowDataPacket row : rows) {
row.setPacketId(service.nextPacketId());
buffer = row.write(buffer, service, true);
}

// writeDirectly last eof
EOFRowPacket lastEof = new EOFRowPacket();
lastEof.setPacketId(service.nextPacketId());
lastEof.write(buffer, service);
}

private static List<RowDataPacket> getRows(ShardingService service, RouteResultset rrs) {
LinkedList<RowDataPacket> rows = new LinkedList<>();
if (!rrs.isNeedOptimizer()) {
// writeDirectly rows
for (RouteResultsetNode node : rrs.getNodes()) {
RowDataPacket row = getRow(node, service.getCharset().getResults());
row.setPacketId(service.nextPacketId());
buffer = row.write(buffer, service, true);
rows.add(getRow(node, service.getCharset().getResults()));
}
} else {
BaseHandlerBuilder builder = buildNodes(rrs, service);
RouteResultsetNode routeSingleNode = getTryRouteSingleNode(builder, rrs);
if (routeSingleNode != null) {
RowDataPacket row = getRow(routeSingleNode, service.getCharset().getResults());
row.setPacketId(service.nextPacketId());
buffer = row.write(buffer, service, true);
rows.add(getRow(routeSingleNode, service.getCharset().getResults()));
} else {
List<ReferenceHandlerInfo> results = ComplexQueryPlanUtil.getComplexQueryResult(builder);
for (ReferenceHandlerInfo result : results) {
Expand All @@ -282,13 +294,10 @@ public static void writeOutHeadAndEof(ShardingService service, RouteResultset rr
row.add(StringUtil.encode(result.getType(), service.getCharset().getResults()));
row.add(StringUtil.encode(result.getRefOrSQL(), service.getCharset().getResults()));
row.setPacketId(service.nextPacketId());
buffer = row.write(buffer, service, true);
rows.add(row);
}
}
}
// writeDirectly last eof
EOFRowPacket lastEof = new EOFRowPacket();
lastEof.setPacketId(service.nextPacketId());
lastEof.write(buffer, service);
return rows;
}
}
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