Many hyperlinks are disabled.
Use anonymous login
to enable hyperlinks.
Overview
| Comment: | First complete attempt to generate a working changeset. Still contains bugs. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | sqldiff-changeset |
| Files: | files | file ages | folders |
| SHA1: |
5611fa9bd5b8fd762d16ce9b0853c2e7 |
| User & Date: | drh 2015-04-11 12:07:40 |
Context
|
2015-04-11
| ||
| 13:48 | The --changeset option now appears to be working. Closed-Leaf check-in: 1a2e2803 user: drh tags: sqldiff-changeset | |
| 12:07 | First complete attempt to generate a working changeset. Still contains bugs. check-in: 5611fa9b user: drh tags: sqldiff-changeset | |
|
2015-04-10
| ||
| 19:41 | Work toward adding the --changeset option to the sqldiff utility program. Changes are incomplete. This is an incremental check-in. check-in: 463e38d7 user: drh tags: sqldiff-changeset | |
Changes
Changes to tool/sqldiff.c.
709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 ... 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 ... 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 ... 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 |
end_diff_one_table:
strFree(&sql);
sqlite3_free(zId);
namelistFree(az);
namelistFree(az2);
return;
}
/*
** Generate a CHANGESET for all differences from main.zTab to aux.zTab.
*/
static void changeset_one_table(const char *zTab, FILE *out){
sqlite3_stmt *pStmt; /* SQL statment */
char *zId = safeId(zTab); /* Escaped name of the table */
char **azCol = 0; /* List of escaped column names */
int nCol = 0; /* Number of columns */
int *aiFlg = 0; /* 0 if column is not part of PK */
int *aiPk = 0; /* Column numbers for each PK column */
int nPk = 0; /* Number of PRIMARY KEY columns */
Str sql; /* SQL for the diff query */
int i; /* Loop counter */
const char *zSep; /* List separator */
pStmt = db_prepare(
"SELECT A.sql=B.sql FROM main.sqlite_master A, aux.sqlite_master B"
" WHERE A.name=%Q AND B.name=%Q", zTab, zTab
);
if( SQLITE_ROW==sqlite3_step(pStmt) ){
................................................................................
aiPk[i-1] = nCol-1;
}
}
sqlite3_finalize(pStmt);
if( nPk==0 ) goto end_changeset_one_table;
strInit(&sql);
if( nCol>nPk ){
strPrintf(&sql, "SELECT 1"); /* Changes to non-PK columns */
for(i=0; i<nCol; i++) strPrintf(&sql, ", A.%s", azCol[i]);
for(i=0; i<nCol; i++) strPrintf(&sql, ", B.%s", azCol[i]);
strPrintf(&sql,"\n FROM main.%s A, aux.%s B\n", zId, zId);
zSep = " WHERE";
for(i=0; i<nPk; i++){
strPrintf(&sql, "%s A.%s=B.%s", zSep, azCol[aiPk[i]], azCol[aiPk[i]]);
zSep = " AND";
................................................................................
for(i=0; i<nCol; i++){
if( aiFlg[i] ) continue;
strPrintf(&sql, "%sA.%s IS NOT B.%s", zSep, azCol[i], azCol[i]);
zSep = " OR\n ";
}
strPrintf(&sql,")\n UNION ALL\n");
}
strPrintf(&sql, "SELECT 2"); /* Deleted rows */
for(i=0; i<nCol; i++) strPrintf(&sql, ", A.%s", azCol[i]);
for(i=0; i<nCol; i++) strPrintf(&sql, ", 0");
strPrintf(&sql, " FROM main.%s A\n", zId);
strPrintf(&sql, " WHERE NOT EXISTS(SELECT 1 FROM aux.%s B\n", zId);
zSep = " WHERE";
for(i=0; i<nPk; i++){
strPrintf(&sql, "%s A.%s=B.%s", zSep, azCol[aiPk[i]], azCol[aiPk[i]]);
zSep = " AND";
}
strPrintf(&sql, ")\n UNION ALL\n");
strPrintf(&sql, "SELECT 3"); /* Inserted rows */
for(i=0; i<nCol; i++) strPrintf(&sql, ", 0");
for(i=0; i<nCol; i++) strPrintf(&sql, ", B.%s", azCol[i]);
strPrintf(&sql, " FROM aux.%s B\n", zId);
strPrintf(&sql, " WHERE NOT EXISTS(SELECT 1 FROM main.%s A\n", zId);
zSep = " WHERE";
for(i=0; i<nPk; i++){
strPrintf(&sql, "%s A.%s=B.%s", zSep, azCol[aiPk[i]], azCol[aiPk[i]]);
................................................................................
zSep = " ";
for(i=0; i<nPk; i++){
strPrintf(&sql, "%s %d", zSep, aiPk[i]+1);
zSep = ",";
}
strPrintf(&sql, ";\n");
printf("for table %s:\n%s\n", zId, sql.z);
strFree(&sql);
end_changeset_one_table:
while( nCol>0 ) sqlite3_free(azCol[--nCol]);
sqlite3_free(azCol);
sqlite3_free(aiPk);
sqlite3_free(zId);
}
|
> > > > > > > > > > > > > > > > > > > > > > > > > | | | | > | < > | > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > |
709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 ... 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 ... 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 ... 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 |
end_diff_one_table: strFree(&sql); sqlite3_free(zId); namelistFree(az); namelistFree(az2); return; } /* ** Write a 64-bit signed integer as a varint onto out */ static void putsVarint(FILE *out, sqlite3_uint64 v){ int i, n; unsigned char buf[12], p[12]; if( v & (((sqlite3_uint64)0xff000000)<<32) ){ p[8] = (unsigned char)v; v >>= 8; for(i=7; i>=0; i--){ p[i] = (unsigned char)((v & 0x7f) | 0x80); v >>= 7; } fwrite(p, 8, 1, out); }else{ n = 9; do{ p[n--] = (unsigned char)((v & 0x7f) | 0x80); v >>= 7; }while( v!=0 ); buf[9] &= 0x7f; fwrite(buf+n+1, 9-n, 1, out); } } /* ** Generate a CHANGESET for all differences from main.zTab to aux.zTab. */ static void changeset_one_table(const char *zTab, FILE *out){ sqlite3_stmt *pStmt; /* SQL statment */ char *zId = safeId(zTab); /* Escaped name of the table */ char **azCol = 0; /* List of escaped column names */ int nCol = 0; /* Number of columns */ int *aiFlg = 0; /* 0 if column is not part of PK */ int *aiPk = 0; /* Column numbers for each PK column */ int nPk = 0; /* Number of PRIMARY KEY columns */ Str sql; /* SQL for the diff query */ int i, j; /* Loop counters */ const char *zSep; /* List separator */ pStmt = db_prepare( "SELECT A.sql=B.sql FROM main.sqlite_master A, aux.sqlite_master B" " WHERE A.name=%Q AND B.name=%Q", zTab, zTab ); if( SQLITE_ROW==sqlite3_step(pStmt) ){ ................................................................................ aiPk[i-1] = nCol-1; } } sqlite3_finalize(pStmt); if( nPk==0 ) goto end_changeset_one_table; strInit(&sql); if( nCol>nPk ){ strPrintf(&sql, "SELECT %d", SQLITE_UPDATE); for(i=0; i<nCol; i++) strPrintf(&sql, ", A.%s", azCol[i]); for(i=0; i<nCol; i++) strPrintf(&sql, ", B.%s", azCol[i]); strPrintf(&sql,"\n FROM main.%s A, aux.%s B\n", zId, zId); zSep = " WHERE"; for(i=0; i<nPk; i++){ strPrintf(&sql, "%s A.%s=B.%s", zSep, azCol[aiPk[i]], azCol[aiPk[i]]); zSep = " AND"; ................................................................................ for(i=0; i<nCol; i++){ if( aiFlg[i] ) continue; strPrintf(&sql, "%sA.%s IS NOT B.%s", zSep, azCol[i], azCol[i]); zSep = " OR\n "; } strPrintf(&sql,")\n UNION ALL\n"); } strPrintf(&sql, "SELECT %d", SQLITE_DELETE); for(i=0; i<nCol; i++) strPrintf(&sql, ", A.%s", azCol[i]); for(i=0; i<nCol; i++) strPrintf(&sql, ", 0"); strPrintf(&sql, " FROM main.%s A\n", zId); strPrintf(&sql, " WHERE NOT EXISTS(SELECT 1 FROM aux.%s B\n", zId); zSep = " WHERE"; for(i=0; i<nPk; i++){ strPrintf(&sql, "%s A.%s=B.%s", zSep, azCol[aiPk[i]], azCol[aiPk[i]]); zSep = " AND"; } strPrintf(&sql, ")\n UNION ALL\n"); strPrintf(&sql, "SELECT %d", SQLITE_INSERT); for(i=0; i<nCol; i++) strPrintf(&sql, ", 0"); for(i=0; i<nCol; i++) strPrintf(&sql, ", B.%s", azCol[i]); strPrintf(&sql, " FROM aux.%s B\n", zId); strPrintf(&sql, " WHERE NOT EXISTS(SELECT 1 FROM main.%s A\n", zId); zSep = " WHERE"; for(i=0; i<nPk; i++){ strPrintf(&sql, "%s A.%s=B.%s", zSep, azCol[aiPk[i]], azCol[aiPk[i]]); ................................................................................ zSep = " "; for(i=0; i<nPk; i++){ strPrintf(&sql, "%s %d", zSep, aiPk[i]+1); zSep = ","; } strPrintf(&sql, ";\n"); if( g.fDebug & DEBUG_DIFF_SQL ){ printf("SQL for %s:\n%s\n", zId, sql.z); goto end_changeset_one_table; } putc('T', out); putsVarint(out, (sqlite3_uint64)nCol); for(i=0; i<nCol; i++) putc(aiFlg[i]!=0, out); fwrite(zTab, 1, strlen(zTab), out); putc(0, out); pStmt = db_prepare("%s", sql.z); while( SQLITE_ROW==sqlite3_step(pStmt) ){ int iType = sqlite3_column_int(pStmt,0); int iFirst = iType==SQLITE_INSERT ? nCol+1 : 1; int iLast = iType==SQLITE_DELETE ? nCol+1 : 2*nCol+1; putc(iType, out); putc(0, out); for(i=iFirst; i<=iLast; i++){ int iDType = sqlite3_column_type(pStmt,i); sqlite3_int64 iX; double rX; sqlite3_uint64 uX; putc(iDType, out); switch( iDType ){ case SQLITE_INTEGER: iX = sqlite3_column_int64(pStmt,i); memcpy(&uX, &iX, 8); for(j=56; j>=0; j-=8) putc((uX>>j)&0xff, out); break; case SQLITE_FLOAT: rX = sqlite3_column_int64(pStmt,i); memcpy(&uX, &rX, 8); for(j=56; j>=0; j-=8) putc((uX>>j)&0xff, out); break; case SQLITE_TEXT: iX = sqlite3_column_bytes(pStmt,i); putsVarint(out, (sqlite3_uint64)iX); fwrite(sqlite3_column_text(pStmt,i),1,iX,out); break; case SQLITE_BLOB: iX = sqlite3_column_bytes(pStmt,i); putsVarint(out, (sqlite3_uint64)iX); fwrite(sqlite3_column_blob(pStmt,i),1,iX,out); break; case SQLITE_NULL: break; } } } sqlite3_finalize(pStmt); end_changeset_one_table: while( nCol>0 ) sqlite3_free(azCol[--nCol]); sqlite3_free(azCol); sqlite3_free(aiPk); sqlite3_free(zId); } |