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Overview
| Comment: | The --changeset option now appears to be working. |
|---|---|
| Downloads: | Tarball | ZIP archive |
| Timelines: | family | ancestors | descendants | both | sqldiff-changeset |
| Files: | files | file ages | folders |
| SHA1: |
1a2e2803920dcf64190d81d8a487d6c3 |
| User & Date: | drh 2015-04-11 13:48:01.693 |
Context
|
2015-04-11
| ||
| 13:49 | Add the --changeset option to the sqldiff utility program, for generating a sessions changeset file instead of an SQL diff. (check-in: f9a3a8391c user: drh tags: trunk) | |
| 13:48 | The --changeset option now appears to be working. (Closed-Leaf check-in: 1a2e280392 user: drh tags: sqldiff-changeset) | |
| 12:07 | First complete attempt to generate a working changeset. Still contains bugs. (check-in: 5611fa9bd5 user: drh tags: sqldiff-changeset) | |
Changes
Changes to tool/sqldiff.c.
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}
/*
** Write a 64-bit signed integer as a varint onto out
*/
static void putsVarint(FILE *out, sqlite3_uint64 v){
int i, n;
| | | | > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > | | 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 |
}
/*
** Write a 64-bit signed integer as a varint onto out
*/
static void putsVarint(FILE *out, sqlite3_uint64 v){
int i, n;
unsigned char 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 );
p[9] &= 0x7f;
fwrite(p+n+1, 9-n, 1, out);
}
}
/*
** Write an SQLite value onto out.
*/
static void putValue(FILE *out, sqlite3_value *pVal){
int iDType = sqlite3_value_type(pVal);
sqlite3_int64 iX;
double rX;
sqlite3_uint64 uX;
int j;
putc(iDType, out);
switch( iDType ){
case SQLITE_INTEGER:
iX = sqlite3_value_int64(pVal);
memcpy(&uX, &iX, 8);
for(j=56; j>=0; j-=8) putc((uX>>j)&0xff, out);
break;
case SQLITE_FLOAT:
rX = sqlite3_value_int64(pVal);
memcpy(&uX, &rX, 8);
for(j=56; j>=0; j-=8) putc((uX>>j)&0xff, out);
break;
case SQLITE_TEXT:
iX = sqlite3_value_bytes(pVal);
putsVarint(out, (sqlite3_uint64)iX);
fwrite(sqlite3_value_text(pVal),1,iX,out);
break;
case SQLITE_BLOB:
iX = sqlite3_value_bytes(pVal);
putsVarint(out, (sqlite3_uint64)iX);
fwrite(sqlite3_value_blob(pVal),1,iX,out);
break;
case SQLITE_NULL:
break;
}
}
/*
** 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, k; /* 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) ){
|
| ︙ | ︙ | |||
785 786 787 788 789 790 791 |
}
}
sqlite3_finalize(pStmt);
if( nPk==0 ) goto end_changeset_one_table;
strInit(&sql);
if( nCol>nPk ){
strPrintf(&sql, "SELECT %d", SQLITE_UPDATE);
| | > | > > > > > | > | > > > > | | > | > > > > | | < < < | < < < < < | > > > > | > > > | > > > > > | | < | > > > > > > < < > | > | > > | < > > | > > > | > | > > | < > > | | < > > | | 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 |
}
}
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++){
if( aiFlg[i] ){
strPrintf(&sql, ",\n A.%s", azCol[i]);
}else{
strPrintf(&sql, ",\n A.%s IS NOT B.%s, A.%s, B.%s",
azCol[i], azCol[i], azCol[i], 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";
}
zSep = "\n 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++){
if( aiFlg[i] ){
strPrintf(&sql, ",\n A.%s", azCol[i]);
}else{
strPrintf(&sql, ",\n 1, A.%s, NULL", azCol[i]);
}
}
strPrintf(&sql, "\n 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++){
if( aiFlg[i] ){
strPrintf(&sql, ",\n B.%s", azCol[i]);
}else{
strPrintf(&sql, ",\n 1, NULL, B.%s", azCol[i]);
}
}
strPrintf(&sql, "\n 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 = " AND";
}
strPrintf(&sql, ")\n");
strPrintf(&sql, " ORDER BY");
zSep = " ";
for(i=0; i<nPk; i++){
strPrintf(&sql, "%s %d", zSep, aiPk[i]+2);
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);
putc(iType, out);
putc(0, out);
switch( sqlite3_column_int(pStmt,0) ){
case SQLITE_UPDATE: {
for(k=1, i=0; i<nCol; i++){
if( aiFlg[i] ){
putValue(out, sqlite3_column_value(pStmt,k));
k++;
}else if( sqlite3_column_int(pStmt,k) ){
putValue(out, sqlite3_column_value(pStmt,k+1));
k += 3;
}else{
putc(0, out);
k += 3;
}
}
for(k=1, i=0; i<nCol; i++){
if( aiFlg[i] ){
putc(0, out);
k++;
}else if( sqlite3_column_int(pStmt,k) ){
putValue(out, sqlite3_column_value(pStmt,k+2));
k += 3;
}else{
putc(0, out);
k += 3;
}
}
break;
}
case SQLITE_INSERT: {
for(k=1, i=0; i<nCol; i++){
if( aiFlg[i] ){
putValue(out, sqlite3_column_value(pStmt,k));
k++;
}else{
putValue(out, sqlite3_column_value(pStmt,k+2));
k += 3;
}
}
break;
}
case SQLITE_DELETE: {
for(k=1, i=0; i<nCol; i++){
if( aiFlg[i] ){
putValue(out, sqlite3_column_value(pStmt,k));
k++;
}else{
putValue(out, sqlite3_column_value(pStmt,k+1));
k += 3;
}
}
break;
}
}
}
sqlite3_finalize(pStmt);
end_changeset_one_table:
while( nCol>0 ) sqlite3_free(azCol[--nCol]);
|
| ︙ | ︙ |