cstore.proto

syntax = "proto2";

package protobuf;

enum CompressionType {
  // Values should match with the corresponding struct in cstore_fdw.h
  NONE = 0;
  PG_LZ = 1;
};

message ColumnBlockSkipNode {
  optional uint64 rowCount = 1;
  optional bytes minimumValue = 2;
  optional bytes maximumValue = 3;
  optional uint64 valueBlockOffset = 4;
  optional uint64 valueLength = 5;
  optional CompressionType valueCompressionType = 6;
  optional uint64 existsBlockOffset = 7;
  optional uint64 existsLength = 8;
}

message ColumnBlockSkipList {
  repeated ColumnBlockSkipNode blockSkipNodeArray = 1;
}

message StripeFooter {
  repeated uint64 skipListSizeArray = 1;
  repeated uint64 existsSizeArray = 2;
  repeated uint64 valueSizeArray = 3;
}

message StripeMetadata {
  optional uint64 fileOffset = 1;
  optional uint64 skipListLength = 2;
  optional uint64 dataLength = 3;
  optional uint64 footerLength = 4;
}

message TableFooter {
  repeated StripeMetadata stripeMetadataArray = 1;
  optional uint32 blockRowCount = 2;
}

message PostScript {
  optional uint64 tableFooterLength = 1;
  optional uint64 versionMajor = 2;
  optional uint64 versionMinor = 3;
  
  // Leave this last in the record
  optional string magicNumber = 8000;
}