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SQLite training in Houston TX on 2019-11-05 (details)
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Overview
Comment:Fix handling of maxAutoFrameSize parameter.
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SHA3-256: d65e5855743534cb8db0d77d107579eae6daafc25c2f6035efa12c3ff0abbe7a
User & Date: dan 2018-02-13 20:08:47
Context
2018-02-13
20:53
Note the fact that zonefile depends on json1 in ext/zonefile/README.md. check-in: fb27d8f6 user: dan tags: zonefile
20:08
Fix handling of maxAutoFrameSize parameter. check-in: d65e5855 user: dan tags: zonefile
19:01
Enhance ext/zonefile/README.md to describe the currently available functionality. check-in: 100137c7 user: dan tags: zonefile
Changes
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Changes to ext/zonefile/README.md.

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where <file> is the name of the file to create on disk, <table> 
is the name of the database table to read and optional argument 
<parameters> is a JSON object containing various attributes that
influence creation of the zonefile file. 

Currently the only <parameters> attribute supported is 
<i>maxAutoFrameSize</i>, which sets the maximum frame size in bytes for
automatically generated zonefile frames. 


For example, to create a zonefile named "test.zonefile" based on the
contents of database table "test_input" and with a maximum automatic
frame size of 4096 bytes:

>     SELECT zonefile_write('test.zonefile', 'test_input',
>       '{"maxAutoFrameSize":4096}'







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where &lt;file&gt; is the name of the file to create on disk, &lt;table&gt; 
is the name of the database table to read and optional argument 
&lt;parameters&gt; is a JSON object containing various attributes that
influence creation of the zonefile file. 

Currently the only &lt;parameters&gt; attribute supported is 
<i>maxAutoFrameSize</i> (default value 65536), which sets the maximum 
uncompressed frame size in bytes for automatically generated zonefile 
frames.

For example, to create a zonefile named "test.zonefile" based on the
contents of database table "test_input" and with a maximum automatic
frame size of 4096 bytes:

>     SELECT zonefile_write('test.zonefile', 'test_input',
>       '{"maxAutoFrameSize":4096}'

Changes to ext/zonefile/zonefile.c.

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  ")"


#include <stdio.h>
#include <string.h>
#include <assert.h>





typedef struct ZonefileWrite ZonefileWrite;
struct ZonefileWrite {
  int compressionTypeIndexData;
  int compressionTypeContent;
  int encryptionType;
  int maxAutoFrameSize;
};




typedef struct ZonefileHeader ZonefileHeader;
struct ZonefileHeader {
  u32 magicNumber;
  u8 compressionTypeIndexData;
  u8 compressionTypeContent;
  u32 byteOffsetDictionary;
  u32 byteOffsetFrames;
................................................................................
  u32 numKeys;
  u8 encryptionType;
  u8 encryptionKeyIdx;
  u8 extendedHeaderVersion;
  u8 extendedHeaderSize;
};




typedef struct ZonefileBuffer ZonefileBuffer;
struct ZonefileBuffer {
  u8 *a;
  int n;
  int nAlloc;
};

................................................................................
  int rc = SQLITE_OK;
  int rc2;

  memset(p, 0, sizeof(ZonefileWrite));
  p->maxAutoFrameSize = ZONEFILE_DEFAULT_MAXAUTOFRAMESIZE;

  rc = zonefilePrepare(db, &pStmt, &zErr,"SELECT key, value FROM json_each(?)");



  while( rc==SQLITE_OK && SQLITE_ROW==sqlite3_step(pStmt) ){
    const char *zKey = (const char*)sqlite3_column_text(pStmt, 0);
    int iVal = sqlite3_column_int(pStmt, 1);
    if( sqlite3_stricmp("maxAutoFrameSize", zKey)==0 ){
      p->maxAutoFrameSize = iVal;
    }else
    if( sqlite3_stricmp("compressionTypeIndexData", zKey)==0 ){







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  ")"


#include <stdio.h>
#include <string.h>
#include <assert.h>

/*
** A structure to store the parameters for a single zonefile_write()
** invocation. 
*/
typedef struct ZonefileWrite ZonefileWrite;
struct ZonefileWrite {
  int compressionTypeIndexData;
  int compressionTypeContent;
  int encryptionType;
  int maxAutoFrameSize;
};

/*
** A structure to store a deserialized zonefile header in.
*/
typedef struct ZonefileHeader ZonefileHeader;
struct ZonefileHeader {
  u32 magicNumber;
  u8 compressionTypeIndexData;
  u8 compressionTypeContent;
  u32 byteOffsetDictionary;
  u32 byteOffsetFrames;
................................................................................
  u32 numKeys;
  u8 encryptionType;
  u8 encryptionKeyIdx;
  u8 extendedHeaderVersion;
  u8 extendedHeaderSize;
};

/*
** Buffer structure used by the zonefile_write() implementation.
*/
typedef struct ZonefileBuffer ZonefileBuffer;
struct ZonefileBuffer {
  u8 *a;
  int n;
  int nAlloc;
};

................................................................................
  int rc = SQLITE_OK;
  int rc2;

  memset(p, 0, sizeof(ZonefileWrite));
  p->maxAutoFrameSize = ZONEFILE_DEFAULT_MAXAUTOFRAMESIZE;

  rc = zonefilePrepare(db, &pStmt, &zErr,"SELECT key, value FROM json_each(?)");
  if( rc==SQLITE_OK ){
    sqlite3_bind_text(pStmt, 1, zJson, -1, SQLITE_STATIC);
  }
  while( rc==SQLITE_OK && SQLITE_ROW==sqlite3_step(pStmt) ){
    const char *zKey = (const char*)sqlite3_column_text(pStmt, 0);
    int iVal = sqlite3_column_int(pStmt, 1);
    if( sqlite3_stricmp("maxAutoFrameSize", zKey)==0 ){
      p->maxAutoFrameSize = iVal;
    }else
    if( sqlite3_stricmp("compressionTypeIndexData", zKey)==0 ){

Changes to ext/zonefile/zonefile1.test.

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  DELETE FROM z1_files;
  SELECT * FROM z1_files;
} {}

do_execsql_test 1.6 { SELECT count(*) FROM z1_shadow_idx } 0

do_execsql_test 1.7 { DROP TABLE z1 }





















































































finish_test









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  DELETE FROM z1_files;
  SELECT * FROM z1_files;
} {}

do_execsql_test 1.6 { SELECT count(*) FROM z1_shadow_idx } 0

do_execsql_test 1.7 { DROP TABLE z1 }

#-------------------------------------------------------------------------

reset_db
load_static_extension db zonefile

do_execsql_test 2.0 {
  CREATE TABLE zz(
    k INTEGER PRIMARY KEY, 
    frame INTEGER DEFAULT -1, 
    idx INTEGER DEFAULT -1, 
    v BLOB
  );
  CREATE TABLE rt(k INTEGER PRIMARY KEY, v BLOB);
  CREATE VIRTUAL TABLE zone USING zonefile;
}

set nMinByte   0
set nMaxByte 444
foreach {zonefile lKey} {
  test1.zonefile {195 1238 298 405 297}
  test2.zonefile {124 1624 82 1929}
  test3.zonefile {932 683 1751 410 41}
  test4.zonefile {427 1491}
  test5.zonefile {1004 473 801 394 1672 816 1577}
  test6.zonefile {1374 1454 1005}
  test7.zonefile {450 241 319 133}
  test8.zonefile {1414 900 1406 1917 127 673}
  test9.zonefile {1192 226 988 1292 718 1345 1675}
  test10.zonefile {314}
  test11.zonefile {1177 1597 60 532 291 1164 812}
  test12.zonefile {1168 1290 1585 939 1916}
  test13.zonefile {644 1784 1476 1283 433 506}
  test14.zonefile {1141 1547 1506 364}
  test15.zonefile {1756 1885 844 1880 1896 354}
  test16.zonefile {1383 1928 1371}
  test17.zonefile {93}
  test18.zonefile {1067}
  test19.zonefile {642}
  test20.zonefile {1380 1857}
  test21.zonefile {288 293 1968 1207 1739 231 300}
  test22.zonefile {651 1007 607 830 299 1431}
  test23.zonefile {81 1651 543 1949 256 119 1088}
  test24.zonefile {1278 2024 682 1115 194 636 1804}
  test25.zonefile {514 1155 171 2015 791}
  test26.zonefile {1615 1228 147 1464}
  test27.zonefile {55 1130 781 678 78}
  test28.zonefile {1981 1401 1178}
  test29.zonefile {1754 864 183 1953 1901}
  test30.zonefile {1461 817}
  test31.zonefile {1720 1722 686 1833}
} {
  forcedelete $zonefile
  execsql { DELETE FROM zz; }
  foreach k $lKey {
    execsql { INSERT INTO zz(k, v) VALUES($k, randomblob($k)) }
  }
  execsql { INSERT INTO rt SELECT k, v FROM zz }
  breakpoint
  execsql { 
    SELECT zonefile_write($zonefile, 'zz', '{"maxAutoFrameSize":2000}');
    INSERT INTO zone_files(filename) VALUES($zonefile);
  }
}

do_execsql_test 2.1 {
  SELECT k FROM zone JOIN rt USING (k) WHERE zone.v!=rt.v
}
do_execsql_test 2.2 {
  SELECT count(*) FROM zone JOIN rt USING (k);
} {135}
do_execsql_test 2.3 {
  SELECT filename, 
         json_extract(header, '$.numKeys'),
         json_extract(header, '$.numFrames')
  FROM zone_files 
  WHERE filename IN ('test19.zonefile', 'test20.zonefile', 'test21.zonefile')
  ORDER BY 1
} {
  test19.zonefile 1 1
  test20.zonefile 2 2
  test21.zonefile 7 4
}


finish_test