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Unified Diff: third_party/sqlite/sqlite-src-3100200/tool/sqldiff.c

Issue 1610543003: [sql] Import reference version of SQLite 3.10.2. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Created 4 years, 11 months ago
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Index: third_party/sqlite/sqlite-src-3100200/tool/sqldiff.c
diff --git a/third_party/sqlite/sqlite-src-3100200/tool/sqldiff.c b/third_party/sqlite/sqlite-src-3100200/tool/sqldiff.c
new file mode 100644
index 0000000000000000000000000000000000000000..56ff53ee25766d6e4941c60a1f85c5a73a89c73a
--- /dev/null
+++ b/third_party/sqlite/sqlite-src-3100200/tool/sqldiff.c
@@ -0,0 +1,1881 @@
+/*
+** 2015-04-06
+**
+** The author disclaims copyright to this source code. In place of
+** a legal notice, here is a blessing:
+**
+** May you do good and not evil.
+** May you find forgiveness for yourself and forgive others.
+** May you share freely, never taking more than you give.
+**
+*************************************************************************
+**
+** This is a utility program that computes the differences in content
+** between two SQLite databases.
+**
+** To compile, simply link against SQLite.
+**
+** See the showHelp() routine below for a brief description of how to
+** run the utility.
+*/
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <ctype.h>
+#include <string.h>
+#include <assert.h>
+#include "sqlite3.h"
+
+/*
+** All global variables are gathered into the "g" singleton.
+*/
+struct GlobalVars {
+ const char *zArgv0; /* Name of program */
+ int bSchemaOnly; /* Only show schema differences */
+ int bSchemaPK; /* Use the schema-defined PK, not the true PK */
+ unsigned fDebug; /* Debug flags */
+ sqlite3 *db; /* The database connection */
+} g;
+
+/*
+** Allowed values for g.fDebug
+*/
+#define DEBUG_COLUMN_NAMES 0x000001
+#define DEBUG_DIFF_SQL 0x000002
+
+/*
+** Dynamic string object
+*/
+typedef struct Str Str;
+struct Str {
+ char *z; /* Text of the string */
+ int nAlloc; /* Bytes allocated in z[] */
+ int nUsed; /* Bytes actually used in z[] */
+};
+
+/*
+** Initialize a Str object
+*/
+static void strInit(Str *p){
+ p->z = 0;
+ p->nAlloc = 0;
+ p->nUsed = 0;
+}
+
+/*
+** Print an error resulting from faulting command-line arguments and
+** abort the program.
+*/
+static void cmdlineError(const char *zFormat, ...){
+ va_list ap;
+ fprintf(stderr, "%s: ", g.zArgv0);
+ va_start(ap, zFormat);
+ vfprintf(stderr, zFormat, ap);
+ va_end(ap);
+ fprintf(stderr, "\n\"%s --help\" for more help\n", g.zArgv0);
+ exit(1);
+}
+
+/*
+** Print an error message for an error that occurs at runtime, then
+** abort the program.
+*/
+static void runtimeError(const char *zFormat, ...){
+ va_list ap;
+ fprintf(stderr, "%s: ", g.zArgv0);
+ va_start(ap, zFormat);
+ vfprintf(stderr, zFormat, ap);
+ va_end(ap);
+ fprintf(stderr, "\n");
+ exit(1);
+}
+
+/*
+** Free all memory held by a Str object
+*/
+static void strFree(Str *p){
+ sqlite3_free(p->z);
+ strInit(p);
+}
+
+/*
+** Add formatted text to the end of a Str object
+*/
+static void strPrintf(Str *p, const char *zFormat, ...){
+ int nNew;
+ for(;;){
+ if( p->z ){
+ va_list ap;
+ va_start(ap, zFormat);
+ sqlite3_vsnprintf(p->nAlloc-p->nUsed, p->z+p->nUsed, zFormat, ap);
+ va_end(ap);
+ nNew = (int)strlen(p->z + p->nUsed);
+ }else{
+ nNew = p->nAlloc;
+ }
+ if( p->nUsed+nNew < p->nAlloc-1 ){
+ p->nUsed += nNew;
+ break;
+ }
+ p->nAlloc = p->nAlloc*2 + 1000;
+ p->z = sqlite3_realloc(p->z, p->nAlloc);
+ if( p->z==0 ) runtimeError("out of memory");
+ }
+}
+
+
+
+/* Safely quote an SQL identifier. Use the minimum amount of transformation
+** necessary to allow the string to be used with %s.
+**
+** Space to hold the returned string is obtained from sqlite3_malloc(). The
+** caller is responsible for ensuring this space is freed when no longer
+** needed.
+*/
+static char *safeId(const char *zId){
+ /* All SQLite keywords, in alphabetical order */
+ static const char *azKeywords[] = {
+ "ABORT", "ACTION", "ADD", "AFTER", "ALL", "ALTER", "ANALYZE", "AND", "AS",
+ "ASC", "ATTACH", "AUTOINCREMENT", "BEFORE", "BEGIN", "BETWEEN", "BY",
+ "CASCADE", "CASE", "CAST", "CHECK", "COLLATE", "COLUMN", "COMMIT",
+ "CONFLICT", "CONSTRAINT", "CREATE", "CROSS", "CURRENT_DATE",
+ "CURRENT_TIME", "CURRENT_TIMESTAMP", "DATABASE", "DEFAULT", "DEFERRABLE",
+ "DEFERRED", "DELETE", "DESC", "DETACH", "DISTINCT", "DROP", "EACH",
+ "ELSE", "END", "ESCAPE", "EXCEPT", "EXCLUSIVE", "EXISTS", "EXPLAIN",
+ "FAIL", "FOR", "FOREIGN", "FROM", "FULL", "GLOB", "GROUP", "HAVING", "IF",
+ "IGNORE", "IMMEDIATE", "IN", "INDEX", "INDEXED", "INITIALLY", "INNER",
+ "INSERT", "INSTEAD", "INTERSECT", "INTO", "IS", "ISNULL", "JOIN", "KEY",
+ "LEFT", "LIKE", "LIMIT", "MATCH", "NATURAL", "NO", "NOT", "NOTNULL",
+ "NULL", "OF", "OFFSET", "ON", "OR", "ORDER", "OUTER", "PLAN", "PRAGMA",
+ "PRIMARY", "QUERY", "RAISE", "RECURSIVE", "REFERENCES", "REGEXP",
+ "REINDEX", "RELEASE", "RENAME", "REPLACE", "RESTRICT", "RIGHT",
+ "ROLLBACK", "ROW", "SAVEPOINT", "SELECT", "SET", "TABLE", "TEMP",
+ "TEMPORARY", "THEN", "TO", "TRANSACTION", "TRIGGER", "UNION", "UNIQUE",
+ "UPDATE", "USING", "VACUUM", "VALUES", "VIEW", "VIRTUAL", "WHEN", "WHERE",
+ "WITH", "WITHOUT",
+ };
+ int lwr, upr, mid, c, i, x;
+ if( zId[0]==0 ) return sqlite3_mprintf("\"\"");
+ for(i=x=0; (c = zId[i])!=0; i++){
+ if( !isalpha(c) && c!='_' ){
+ if( i>0 && isdigit(c) ){
+ x++;
+ }else{
+ return sqlite3_mprintf("\"%w\"", zId);
+ }
+ }
+ }
+ if( x ) return sqlite3_mprintf("%s", zId);
+ lwr = 0;
+ upr = sizeof(azKeywords)/sizeof(azKeywords[0]) - 1;
+ while( lwr<=upr ){
+ mid = (lwr+upr)/2;
+ c = sqlite3_stricmp(azKeywords[mid], zId);
+ if( c==0 ) return sqlite3_mprintf("\"%w\"", zId);
+ if( c<0 ){
+ lwr = mid+1;
+ }else{
+ upr = mid-1;
+ }
+ }
+ return sqlite3_mprintf("%s", zId);
+}
+
+/*
+** Prepare a new SQL statement. Print an error and abort if anything
+** goes wrong.
+*/
+static sqlite3_stmt *db_vprepare(const char *zFormat, va_list ap){
+ char *zSql;
+ int rc;
+ sqlite3_stmt *pStmt;
+
+ zSql = sqlite3_vmprintf(zFormat, ap);
+ if( zSql==0 ) runtimeError("out of memory");
+ rc = sqlite3_prepare_v2(g.db, zSql, -1, &pStmt, 0);
+ if( rc ){
+ runtimeError("SQL statement error: %s\n\"%s\"", sqlite3_errmsg(g.db),
+ zSql);
+ }
+ sqlite3_free(zSql);
+ return pStmt;
+}
+static sqlite3_stmt *db_prepare(const char *zFormat, ...){
+ va_list ap;
+ sqlite3_stmt *pStmt;
+ va_start(ap, zFormat);
+ pStmt = db_vprepare(zFormat, ap);
+ va_end(ap);
+ return pStmt;
+}
+
+/*
+** Free a list of strings
+*/
+static void namelistFree(char **az){
+ if( az ){
+ int i;
+ for(i=0; az[i]; i++) sqlite3_free(az[i]);
+ sqlite3_free(az);
+ }
+}
+
+/*
+** Return a list of column names for the table zDb.zTab. Space to
+** hold the list is obtained from sqlite3_malloc() and should released
+** using namelistFree() when no longer needed.
+**
+** Primary key columns are listed first, followed by data columns.
+** The number of columns in the primary key is returned in *pnPkey.
+**
+** Normally, the "primary key" in the previous sentence is the true
+** primary key - the rowid or INTEGER PRIMARY KEY for ordinary tables
+** or the declared PRIMARY KEY for WITHOUT ROWID tables. However, if
+** the g.bSchemaPK flag is set, then the schema-defined PRIMARY KEY is
+** used in all cases. In that case, entries that have NULL values in
+** any of their primary key fields will be excluded from the analysis.
+**
+** If the primary key for a table is the rowid but rowid is inaccessible,
+** then this routine returns a NULL pointer.
+**
+** Examples:
+** CREATE TABLE t1(a INT UNIQUE, b INTEGER, c TEXT, PRIMARY KEY(c));
+** *pnPKey = 1;
+** az = { "rowid", "a", "b", "c", 0 } // Normal case
+** az = { "c", "a", "b", 0 } // g.bSchemaPK==1
+**
+** CREATE TABLE t2(a INT UNIQUE, b INTEGER, c TEXT, PRIMARY KEY(b));
+** *pnPKey = 1;
+** az = { "b", "a", "c", 0 }
+**
+** CREATE TABLE t3(x,y,z,PRIMARY KEY(y,z));
+** *pnPKey = 1 // Normal case
+** az = { "rowid", "x", "y", "z", 0 } // Normal case
+** *pnPKey = 2 // g.bSchemaPK==1
+** az = { "y", "x", "z", 0 } // g.bSchemaPK==1
+**
+** CREATE TABLE t4(x,y,z,PRIMARY KEY(y,z)) WITHOUT ROWID;
+** *pnPKey = 2
+** az = { "y", "z", "x", 0 }
+**
+** CREATE TABLE t5(rowid,_rowid_,oid);
+** az = 0 // The rowid is not accessible
+*/
+static char **columnNames(
+ const char *zDb, /* Database ("main" or "aux") to query */
+ const char *zTab, /* Name of table to return details of */
+ int *pnPKey, /* OUT: Number of PK columns */
+ int *pbRowid /* OUT: True if PK is an implicit rowid */
+){
+ char **az = 0; /* List of column names to be returned */
+ int naz = 0; /* Number of entries in az[] */
+ sqlite3_stmt *pStmt; /* SQL statement being run */
+ char *zPkIdxName = 0; /* Name of the PRIMARY KEY index */
+ int truePk = 0; /* PRAGMA table_info indentifies the PK to use */
+ int nPK = 0; /* Number of PRIMARY KEY columns */
+ int i, j; /* Loop counters */
+
+ if( g.bSchemaPK==0 ){
+ /* Normal case: Figure out what the true primary key is for the table.
+ ** * For WITHOUT ROWID tables, the true primary key is the same as
+ ** the schema PRIMARY KEY, which is guaranteed to be present.
+ ** * For rowid tables with an INTEGER PRIMARY KEY, the true primary
+ ** key is the INTEGER PRIMARY KEY.
+ ** * For all other rowid tables, the rowid is the true primary key.
+ */
+ pStmt = db_prepare("PRAGMA %s.index_list=%Q", zDb, zTab);
+ while( SQLITE_ROW==sqlite3_step(pStmt) ){
+ if( sqlite3_stricmp((const char*)sqlite3_column_text(pStmt,3),"pk")==0 ){
+ zPkIdxName = sqlite3_mprintf("%s", sqlite3_column_text(pStmt, 1));
+ break;
+ }
+ }
+ sqlite3_finalize(pStmt);
+ if( zPkIdxName ){
+ int nKey = 0;
+ int nCol = 0;
+ truePk = 0;
+ pStmt = db_prepare("PRAGMA %s.index_xinfo=%Q", zDb, zPkIdxName);
+ while( SQLITE_ROW==sqlite3_step(pStmt) ){
+ nCol++;
+ if( sqlite3_column_int(pStmt,5) ){ nKey++; continue; }
+ if( sqlite3_column_int(pStmt,1)>=0 ) truePk = 1;
+ }
+ if( nCol==nKey ) truePk = 1;
+ if( truePk ){
+ nPK = nKey;
+ }else{
+ nPK = 1;
+ }
+ sqlite3_finalize(pStmt);
+ sqlite3_free(zPkIdxName);
+ }else{
+ truePk = 1;
+ nPK = 1;
+ }
+ pStmt = db_prepare("PRAGMA %s.table_info=%Q", zDb, zTab);
+ }else{
+ /* The g.bSchemaPK==1 case: Use whatever primary key is declared
+ ** in the schema. The "rowid" will still be used as the primary key
+ ** if the table definition does not contain a PRIMARY KEY.
+ */
+ nPK = 0;
+ pStmt = db_prepare("PRAGMA %s.table_info=%Q", zDb, zTab);
+ while( SQLITE_ROW==sqlite3_step(pStmt) ){
+ if( sqlite3_column_int(pStmt,5)>0 ) nPK++;
+ }
+ sqlite3_reset(pStmt);
+ if( nPK==0 ) nPK = 1;
+ truePk = 1;
+ }
+ *pnPKey = nPK;
+ naz = nPK;
+ az = sqlite3_malloc( sizeof(char*)*(nPK+1) );
+ if( az==0 ) runtimeError("out of memory");
+ memset(az, 0, sizeof(char*)*(nPK+1));
+ while( SQLITE_ROW==sqlite3_step(pStmt) ){
+ int iPKey;
+ if( truePk && (iPKey = sqlite3_column_int(pStmt,5))>0 ){
+ az[iPKey-1] = safeId((char*)sqlite3_column_text(pStmt,1));
+ }else{
+ az = sqlite3_realloc(az, sizeof(char*)*(naz+2) );
+ if( az==0 ) runtimeError("out of memory");
+ az[naz++] = safeId((char*)sqlite3_column_text(pStmt,1));
+ }
+ }
+ sqlite3_finalize(pStmt);
+ if( az ) az[naz] = 0;
+
+ /* If it is non-NULL, set *pbRowid to indicate whether or not the PK of
+ ** this table is an implicit rowid (*pbRowid==1) or not (*pbRowid==0). */
+ if( pbRowid ) *pbRowid = (az[0]==0);
+
+ /* If this table has an implicit rowid for a PK, figure out how to refer
+ ** to it. There are three options - "rowid", "_rowid_" and "oid". Any
+ ** of these will work, unless the table has an explicit column of the
+ ** same name. */
+ if( az[0]==0 ){
+ const char *azRowid[] = { "rowid", "_rowid_", "oid" };
+ for(i=0; i<sizeof(azRowid)/sizeof(azRowid[0]); i++){
+ for(j=1; j<naz; j++){
+ if( sqlite3_stricmp(az[j], azRowid[i])==0 ) break;
+ }
+ if( j>=naz ){
+ az[0] = sqlite3_mprintf("%s", azRowid[i]);
+ break;
+ }
+ }
+ if( az[0]==0 ){
+ for(i=1; i<naz; i++) sqlite3_free(az[i]);
+ sqlite3_free(az);
+ az = 0;
+ }
+ }
+ return az;
+}
+
+/*
+** Print the sqlite3_value X as an SQL literal.
+*/
+static void printQuoted(FILE *out, sqlite3_value *X){
+ switch( sqlite3_value_type(X) ){
+ case SQLITE_FLOAT: {
+ double r1;
+ char zBuf[50];
+ r1 = sqlite3_value_double(X);
+ sqlite3_snprintf(sizeof(zBuf), zBuf, "%!.15g", r1);
+ fprintf(out, "%s", zBuf);
+ break;
+ }
+ case SQLITE_INTEGER: {
+ fprintf(out, "%lld", sqlite3_value_int64(X));
+ break;
+ }
+ case SQLITE_BLOB: {
+ const unsigned char *zBlob = sqlite3_value_blob(X);
+ int nBlob = sqlite3_value_bytes(X);
+ if( zBlob ){
+ int i;
+ fprintf(out, "x'");
+ for(i=0; i<nBlob; i++){
+ fprintf(out, "%02x", zBlob[i]);
+ }
+ fprintf(out, "'");
+ }else{
+ fprintf(out, "NULL");
+ }
+ break;
+ }
+ case SQLITE_TEXT: {
+ const unsigned char *zArg = sqlite3_value_text(X);
+ int i, j;
+
+ if( zArg==0 ){
+ fprintf(out, "NULL");
+ }else{
+ fprintf(out, "'");
+ for(i=j=0; zArg[i]; i++){
+ if( zArg[i]=='\'' ){
+ fprintf(out, "%.*s'", i-j+1, &zArg[j]);
+ j = i+1;
+ }
+ }
+ fprintf(out, "%s'", &zArg[j]);
+ }
+ break;
+ }
+ case SQLITE_NULL: {
+ fprintf(out, "NULL");
+ break;
+ }
+ }
+}
+
+/*
+** Output SQL that will recreate the aux.zTab table.
+*/
+static void dump_table(const char *zTab, FILE *out){
+ char *zId = safeId(zTab); /* Name of the table */
+ char **az = 0; /* List of columns */
+ int nPk; /* Number of true primary key columns */
+ int nCol; /* Number of data columns */
+ int i; /* Loop counter */
+ sqlite3_stmt *pStmt; /* SQL statement */
+ const char *zSep; /* Separator string */
+ Str ins; /* Beginning of the INSERT statement */
+
+ pStmt = db_prepare("SELECT sql FROM aux.sqlite_master WHERE name=%Q", zTab);
+ if( SQLITE_ROW==sqlite3_step(pStmt) ){
+ fprintf(out, "%s;\n", sqlite3_column_text(pStmt,0));
+ }
+ sqlite3_finalize(pStmt);
+ if( !g.bSchemaOnly ){
+ az = columnNames("aux", zTab, &nPk, 0);
+ strInit(&ins);
+ if( az==0 ){
+ pStmt = db_prepare("SELECT * FROM aux.%s", zId);
+ strPrintf(&ins,"INSERT INTO %s VALUES", zId);
+ }else{
+ Str sql;
+ strInit(&sql);
+ zSep = "SELECT";
+ for(i=0; az[i]; i++){
+ strPrintf(&sql, "%s %s", zSep, az[i]);
+ zSep = ",";
+ }
+ strPrintf(&sql," FROM aux.%s", zId);
+ zSep = " ORDER BY";
+ for(i=1; i<=nPk; i++){
+ strPrintf(&sql, "%s %d", zSep, i);
+ zSep = ",";
+ }
+ pStmt = db_prepare("%s", sql.z);
+ strFree(&sql);
+ strPrintf(&ins, "INSERT INTO %s", zId);
+ zSep = "(";
+ for(i=0; az[i]; i++){
+ strPrintf(&ins, "%s%s", zSep, az[i]);
+ zSep = ",";
+ }
+ strPrintf(&ins,") VALUES");
+ namelistFree(az);
+ }
+ nCol = sqlite3_column_count(pStmt);
+ while( SQLITE_ROW==sqlite3_step(pStmt) ){
+ fprintf(out, "%s",ins.z);
+ zSep = "(";
+ for(i=0; i<nCol; i++){
+ fprintf(out, "%s",zSep);
+ printQuoted(out, sqlite3_column_value(pStmt,i));
+ zSep = ",";
+ }
+ fprintf(out, ");\n");
+ }
+ sqlite3_finalize(pStmt);
+ strFree(&ins);
+ } /* endif !g.bSchemaOnly */
+ pStmt = db_prepare("SELECT sql FROM aux.sqlite_master"
+ " WHERE type='index' AND tbl_name=%Q AND sql IS NOT NULL",
+ zTab);
+ while( SQLITE_ROW==sqlite3_step(pStmt) ){
+ fprintf(out, "%s;\n", sqlite3_column_text(pStmt,0));
+ }
+ sqlite3_finalize(pStmt);
+}
+
+
+/*
+** Compute all differences for a single table.
+*/
+static void diff_one_table(const char *zTab, FILE *out){
+ char *zId = safeId(zTab); /* Name of table (translated for us in SQL) */
+ char **az = 0; /* Columns in main */
+ char **az2 = 0; /* Columns in aux */
+ int nPk; /* Primary key columns in main */
+ int nPk2; /* Primary key columns in aux */
+ int n = 0; /* Number of columns in main */
+ int n2; /* Number of columns in aux */
+ int nQ; /* Number of output columns in the diff query */
+ int i; /* Loop counter */
+ const char *zSep; /* Separator string */
+ Str sql; /* Comparison query */
+ sqlite3_stmt *pStmt; /* Query statement to do the diff */
+
+ strInit(&sql);
+ if( g.fDebug==DEBUG_COLUMN_NAMES ){
+ /* Simply run columnNames() on all tables of the origin
+ ** database and show the results. This is used for testing
+ ** and debugging of the columnNames() function.
+ */
+ az = columnNames("aux",zTab, &nPk, 0);
+ if( az==0 ){
+ printf("Rowid not accessible for %s\n", zId);
+ }else{
+ printf("%s:", zId);
+ for(i=0; az[i]; i++){
+ printf(" %s", az[i]);
+ if( i+1==nPk ) printf(" *");
+ }
+ printf("\n");
+ }
+ goto end_diff_one_table;
+ }
+
+
+ if( sqlite3_table_column_metadata(g.db,"aux",zTab,0,0,0,0,0,0) ){
+ if( !sqlite3_table_column_metadata(g.db,"main",zTab,0,0,0,0,0,0) ){
+ /* Table missing from second database. */
+ fprintf(out, "DROP TABLE %s;\n", zId);
+ }
+ goto end_diff_one_table;
+ }
+
+ if( sqlite3_table_column_metadata(g.db,"main",zTab,0,0,0,0,0,0) ){
+ /* Table missing from source */
+ dump_table(zTab, out);
+ goto end_diff_one_table;
+ }
+
+ az = columnNames("main", zTab, &nPk, 0);
+ az2 = columnNames("aux", zTab, &nPk2, 0);
+ if( az && az2 ){
+ for(n=0; az[n] && az2[n]; n++){
+ if( sqlite3_stricmp(az[n],az2[n])!=0 ) break;
+ }
+ }
+ if( az==0
+ || az2==0
+ || nPk!=nPk2
+ || az[n]
+ ){
+ /* Schema mismatch */
+ fprintf(out, "DROP TABLE %s; -- due to schema mismatch\n", zId);
+ dump_table(zTab, out);
+ goto end_diff_one_table;
+ }
+
+ /* Build the comparison query */
+ for(n2=n; az2[n2]; n2++){
+ fprintf(out, "ALTER TABLE %s ADD COLUMN %s;\n", zId, safeId(az2[n2]));
+ }
+ nQ = nPk2+1+2*(n2-nPk2);
+ if( n2>nPk2 ){
+ zSep = "SELECT ";
+ for(i=0; i<nPk; i++){
+ strPrintf(&sql, "%sB.%s", zSep, az[i]);
+ zSep = ", ";
+ }
+ strPrintf(&sql, ", 1%s -- changed row\n", nPk==n ? "" : ",");
+ while( az[i] ){
+ strPrintf(&sql, " A.%s IS NOT B.%s, B.%s%s\n",
+ az[i], az2[i], az2[i], az2[i+1]==0 ? "" : ",");
+ i++;
+ }
+ while( az2[i] ){
+ strPrintf(&sql, " B.%s IS NOT NULL, B.%s%s\n",
+ az2[i], az2[i], az2[i+1]==0 ? "" : ",");
+ i++;
+ }
+ strPrintf(&sql, " 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, az[i], az[i]);
+ zSep = " AND";
+ }
+ zSep = "\n AND (";
+ while( az[i] ){
+ strPrintf(&sql, "%sA.%s IS NOT B.%s%s\n",
+ zSep, az[i], az2[i], az2[i+1]==0 ? ")" : "");
+ zSep = " OR ";
+ i++;
+ }
+ while( az2[i] ){
+ strPrintf(&sql, "%sB.%s IS NOT NULL%s\n",
+ zSep, az2[i], az2[i+1]==0 ? ")" : "");
+ zSep = " OR ";
+ i++;
+ }
+ strPrintf(&sql, " UNION ALL\n");
+ }
+ zSep = "SELECT ";
+ for(i=0; i<nPk; i++){
+ strPrintf(&sql, "%sA.%s", zSep, az[i]);
+ zSep = ", ";
+ }
+ strPrintf(&sql, ", 2%s -- deleted row\n", nPk==n ? "" : ",");
+ while( az2[i] ){
+ strPrintf(&sql, " NULL, NULL%s\n", i==n2-1 ? "" : ",");
+ i++;
+ }
+ 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, az[i], az[i]);
+ zSep = " AND";
+ }
+ strPrintf(&sql, ")\n");
+ zSep = " UNION ALL\nSELECT ";
+ for(i=0; i<nPk; i++){
+ strPrintf(&sql, "%sB.%s", zSep, az[i]);
+ zSep = ", ";
+ }
+ strPrintf(&sql, ", 3%s -- inserted row\n", nPk==n ? "" : ",");
+ while( az2[i] ){
+ strPrintf(&sql, " 1, B.%s%s\n", az2[i], az2[i+1]==0 ? "" : ",");
+ 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, az[i], az[i]);
+ zSep = " AND";
+ }
+ strPrintf(&sql, ")\n ORDER BY");
+ zSep = " ";
+ for(i=1; i<=nPk; i++){
+ strPrintf(&sql, "%s%d", zSep, i);
+ zSep = ", ";
+ }
+ strPrintf(&sql, ";\n");
+
+ if( g.fDebug & DEBUG_DIFF_SQL ){
+ printf("SQL for %s:\n%s\n", zId, sql.z);
+ goto end_diff_one_table;
+ }
+
+ /* Drop indexes that are missing in the destination */
+ pStmt = db_prepare(
+ "SELECT name FROM main.sqlite_master"
+ " WHERE type='index' AND tbl_name=%Q"
+ " AND sql IS NOT NULL"
+ " AND sql NOT IN (SELECT sql FROM aux.sqlite_master"
+ " WHERE type='index' AND tbl_name=%Q"
+ " AND sql IS NOT NULL)",
+ zTab, zTab);
+ while( SQLITE_ROW==sqlite3_step(pStmt) ){
+ char *z = safeId((const char*)sqlite3_column_text(pStmt,0));
+ fprintf(out, "DROP INDEX %s;\n", z);
+ sqlite3_free(z);
+ }
+ sqlite3_finalize(pStmt);
+
+ /* Run the query and output differences */
+ if( !g.bSchemaOnly ){
+ pStmt = db_prepare(sql.z);
+ while( SQLITE_ROW==sqlite3_step(pStmt) ){
+ int iType = sqlite3_column_int(pStmt, nPk);
+ if( iType==1 || iType==2 ){
+ if( iType==1 ){ /* Change the content of a row */
+ fprintf(out, "UPDATE %s", zId);
+ zSep = " SET";
+ for(i=nPk+1; i<nQ; i+=2){
+ if( sqlite3_column_int(pStmt,i)==0 ) continue;
+ fprintf(out, "%s %s=", zSep, az2[(i+nPk-1)/2]);
+ zSep = ",";
+ printQuoted(out, sqlite3_column_value(pStmt,i+1));
+ }
+ }else{ /* Delete a row */
+ fprintf(out, "DELETE FROM %s", zId);
+ }
+ zSep = " WHERE";
+ for(i=0; i<nPk; i++){
+ fprintf(out, "%s %s=", zSep, az2[i]);
+ printQuoted(out, sqlite3_column_value(pStmt,i));
+ zSep = " AND";
+ }
+ fprintf(out, ";\n");
+ }else{ /* Insert a row */
+ fprintf(out, "INSERT INTO %s(%s", zId, az2[0]);
+ for(i=1; az2[i]; i++) fprintf(out, ",%s", az2[i]);
+ fprintf(out, ") VALUES");
+ zSep = "(";
+ for(i=0; i<nPk2; i++){
+ fprintf(out, "%s", zSep);
+ zSep = ",";
+ printQuoted(out, sqlite3_column_value(pStmt,i));
+ }
+ for(i=nPk2+2; i<nQ; i+=2){
+ fprintf(out, ",");
+ printQuoted(out, sqlite3_column_value(pStmt,i));
+ }
+ fprintf(out, ");\n");
+ }
+ }
+ sqlite3_finalize(pStmt);
+ } /* endif !g.bSchemaOnly */
+
+ /* Create indexes that are missing in the source */
+ pStmt = db_prepare(
+ "SELECT sql FROM aux.sqlite_master"
+ " WHERE type='index' AND tbl_name=%Q"
+ " AND sql IS NOT NULL"
+ " AND sql NOT IN (SELECT sql FROM main.sqlite_master"
+ " WHERE type='index' AND tbl_name=%Q"
+ " AND sql IS NOT NULL)",
+ zTab, zTab);
+ while( SQLITE_ROW==sqlite3_step(pStmt) ){
+ fprintf(out, "%s;\n", sqlite3_column_text(pStmt,0));
+ }
+ sqlite3_finalize(pStmt);
+
+end_diff_one_table:
+ strFree(&sql);
+ sqlite3_free(zId);
+ namelistFree(az);
+ namelistFree(az2);
+ return;
+}
+
+/*
+** Check that table zTab exists and has the same schema in both the "main"
+** and "aux" databases currently opened by the global db handle. If they
+** do not, output an error message on stderr and exit(1). Otherwise, if
+** the schemas do match, return control to the caller.
+*/
+static void checkSchemasMatch(const char *zTab){
+ sqlite3_stmt *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) ){
+ if( sqlite3_column_int(pStmt,0)==0 ){
+ runtimeError("schema changes for table %s", safeId(zTab));
+ }
+ }else{
+ runtimeError("table %s missing from one or both databases", safeId(zTab));
+ }
+ sqlite3_finalize(pStmt);
+}
+
+/**************************************************************************
+** The following code is copied from fossil. It is used to generate the
+** fossil delta blobs sometimes used in RBU update records.
+*/
+
+typedef unsigned short u16;
+typedef unsigned int u32;
+typedef unsigned char u8;
+
+/*
+** The width of a hash window in bytes. The algorithm only works if this
+** is a power of 2.
+*/
+#define NHASH 16
+
+/*
+** The current state of the rolling hash.
+**
+** z[] holds the values that have been hashed. z[] is a circular buffer.
+** z[i] is the first entry and z[(i+NHASH-1)%NHASH] is the last entry of
+** the window.
+**
+** Hash.a is the sum of all elements of hash.z[]. Hash.b is a weighted
+** sum. Hash.b is z[i]*NHASH + z[i+1]*(NHASH-1) + ... + z[i+NHASH-1]*1.
+** (Each index for z[] should be module NHASH, of course. The %NHASH operator
+** is omitted in the prior expression for brevity.)
+*/
+typedef struct hash hash;
+struct hash {
+ u16 a, b; /* Hash values */
+ u16 i; /* Start of the hash window */
+ char z[NHASH]; /* The values that have been hashed */
+};
+
+/*
+** Initialize the rolling hash using the first NHASH characters of z[]
+*/
+static void hash_init(hash *pHash, const char *z){
+ u16 a, b, i;
+ a = b = 0;
+ for(i=0; i<NHASH; i++){
+ a += z[i];
+ b += (NHASH-i)*z[i];
+ pHash->z[i] = z[i];
+ }
+ pHash->a = a & 0xffff;
+ pHash->b = b & 0xffff;
+ pHash->i = 0;
+}
+
+/*
+** Advance the rolling hash by a single character "c"
+*/
+static void hash_next(hash *pHash, int c){
+ u16 old = pHash->z[pHash->i];
+ pHash->z[pHash->i] = (char)c;
+ pHash->i = (pHash->i+1)&(NHASH-1);
+ pHash->a = pHash->a - old + (char)c;
+ pHash->b = pHash->b - NHASH*old + pHash->a;
+}
+
+/*
+** Return a 32-bit hash value
+*/
+static u32 hash_32bit(hash *pHash){
+ return (pHash->a & 0xffff) | (((u32)(pHash->b & 0xffff))<<16);
+}
+
+/*
+** Write an base-64 integer into the given buffer.
+*/
+static void putInt(unsigned int v, char **pz){
+ static const char zDigits[] =
+ "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz~";
+ /* 123456789 123456789 123456789 123456789 123456789 123456789 123 */
+ int i, j;
+ char zBuf[20];
+ if( v==0 ){
+ *(*pz)++ = '0';
+ return;
+ }
+ for(i=0; v>0; i++, v>>=6){
+ zBuf[i] = zDigits[v&0x3f];
+ }
+ for(j=i-1; j>=0; j--){
+ *(*pz)++ = zBuf[j];
+ }
+}
+
+/*
+** Return the number digits in the base-64 representation of a positive integer
+*/
+static int digit_count(int v){
+ unsigned int i, x;
+ for(i=1, x=64; (unsigned int)v>=x; i++, x <<= 6){}
+ return i;
+}
+
+/*
+** Compute a 32-bit checksum on the N-byte buffer. Return the result.
+*/
+static unsigned int checksum(const char *zIn, size_t N){
+ const unsigned char *z = (const unsigned char *)zIn;
+ unsigned sum0 = 0;
+ unsigned sum1 = 0;
+ unsigned sum2 = 0;
+ unsigned sum3 = 0;
+ while(N >= 16){
+ sum0 += ((unsigned)z[0] + z[4] + z[8] + z[12]);
+ sum1 += ((unsigned)z[1] + z[5] + z[9] + z[13]);
+ sum2 += ((unsigned)z[2] + z[6] + z[10]+ z[14]);
+ sum3 += ((unsigned)z[3] + z[7] + z[11]+ z[15]);
+ z += 16;
+ N -= 16;
+ }
+ while(N >= 4){
+ sum0 += z[0];
+ sum1 += z[1];
+ sum2 += z[2];
+ sum3 += z[3];
+ z += 4;
+ N -= 4;
+ }
+ sum3 += (sum2 << 8) + (sum1 << 16) + (sum0 << 24);
+ switch(N){
+ case 3: sum3 += (z[2] << 8);
+ case 2: sum3 += (z[1] << 16);
+ case 1: sum3 += (z[0] << 24);
+ default: ;
+ }
+ return sum3;
+}
+
+/*
+** Create a new delta.
+**
+** The delta is written into a preallocated buffer, zDelta, which
+** should be at least 60 bytes longer than the target file, zOut.
+** The delta string will be NUL-terminated, but it might also contain
+** embedded NUL characters if either the zSrc or zOut files are
+** binary. This function returns the length of the delta string
+** in bytes, excluding the final NUL terminator character.
+**
+** Output Format:
+**
+** The delta begins with a base64 number followed by a newline. This
+** number is the number of bytes in the TARGET file. Thus, given a
+** delta file z, a program can compute the size of the output file
+** simply by reading the first line and decoding the base-64 number
+** found there. The delta_output_size() routine does exactly this.
+**
+** After the initial size number, the delta consists of a series of
+** literal text segments and commands to copy from the SOURCE file.
+** A copy command looks like this:
+**
+** NNN@MMM,
+**
+** where NNN is the number of bytes to be copied and MMM is the offset
+** into the source file of the first byte (both base-64). If NNN is 0
+** it means copy the rest of the input file. Literal text is like this:
+**
+** NNN:TTTTT
+**
+** where NNN is the number of bytes of text (base-64) and TTTTT is the text.
+**
+** The last term is of the form
+**
+** NNN;
+**
+** In this case, NNN is a 32-bit bigendian checksum of the output file
+** that can be used to verify that the delta applied correctly. All
+** numbers are in base-64.
+**
+** Pure text files generate a pure text delta. Binary files generate a
+** delta that may contain some binary data.
+**
+** Algorithm:
+**
+** The encoder first builds a hash table to help it find matching
+** patterns in the source file. 16-byte chunks of the source file
+** sampled at evenly spaced intervals are used to populate the hash
+** table.
+**
+** Next we begin scanning the target file using a sliding 16-byte
+** window. The hash of the 16-byte window in the target is used to
+** search for a matching section in the source file. When a match
+** is found, a copy command is added to the delta. An effort is
+** made to extend the matching section to regions that come before
+** and after the 16-byte hash window. A copy command is only issued
+** if the result would use less space that just quoting the text
+** literally. Literal text is added to the delta for sections that
+** do not match or which can not be encoded efficiently using copy
+** commands.
+*/
+static int rbuDeltaCreate(
+ const char *zSrc, /* The source or pattern file */
+ unsigned int lenSrc, /* Length of the source file */
+ const char *zOut, /* The target file */
+ unsigned int lenOut, /* Length of the target file */
+ char *zDelta /* Write the delta into this buffer */
+){
+ unsigned int i, base;
+ char *zOrigDelta = zDelta;
+ hash h;
+ int nHash; /* Number of hash table entries */
+ int *landmark; /* Primary hash table */
+ int *collide; /* Collision chain */
+ int lastRead = -1; /* Last byte of zSrc read by a COPY command */
+
+ /* Add the target file size to the beginning of the delta
+ */
+ putInt(lenOut, &zDelta);
+ *(zDelta++) = '\n';
+
+ /* If the source file is very small, it means that we have no
+ ** chance of ever doing a copy command. Just output a single
+ ** literal segment for the entire target and exit.
+ */
+ if( lenSrc<=NHASH ){
+ putInt(lenOut, &zDelta);
+ *(zDelta++) = ':';
+ memcpy(zDelta, zOut, lenOut);
+ zDelta += lenOut;
+ putInt(checksum(zOut, lenOut), &zDelta);
+ *(zDelta++) = ';';
+ return zDelta - zOrigDelta;
+ }
+
+ /* Compute the hash table used to locate matching sections in the
+ ** source file.
+ */
+ nHash = lenSrc/NHASH;
+ collide = sqlite3_malloc( nHash*2*sizeof(int) );
+ landmark = &collide[nHash];
+ memset(landmark, -1, nHash*sizeof(int));
+ memset(collide, -1, nHash*sizeof(int));
+ for(i=0; i<lenSrc-NHASH; i+=NHASH){
+ int hv;
+ hash_init(&h, &zSrc[i]);
+ hv = hash_32bit(&h) % nHash;
+ collide[i/NHASH] = landmark[hv];
+ landmark[hv] = i/NHASH;
+ }
+
+ /* Begin scanning the target file and generating copy commands and
+ ** literal sections of the delta.
+ */
+ base = 0; /* We have already generated everything before zOut[base] */
+ while( base+NHASH<lenOut ){
+ int iSrc, iBlock;
+ int bestCnt, bestOfst=0, bestLitsz=0;
+ hash_init(&h, &zOut[base]);
+ i = 0; /* Trying to match a landmark against zOut[base+i] */
+ bestCnt = 0;
+ while( 1 ){
+ int hv;
+ int limit = 250;
+
+ hv = hash_32bit(&h) % nHash;
+ iBlock = landmark[hv];
+ while( iBlock>=0 && (limit--)>0 ){
+ /*
+ ** The hash window has identified a potential match against
+ ** landmark block iBlock. But we need to investigate further.
+ **
+ ** Look for a region in zOut that matches zSrc. Anchor the search
+ ** at zSrc[iSrc] and zOut[base+i]. Do not include anything prior to
+ ** zOut[base] or after zOut[outLen] nor anything after zSrc[srcLen].
+ **
+ ** Set cnt equal to the length of the match and set ofst so that
+ ** zSrc[ofst] is the first element of the match. litsz is the number
+ ** of characters between zOut[base] and the beginning of the match.
+ ** sz will be the overhead (in bytes) needed to encode the copy
+ ** command. Only generate copy command if the overhead of the
+ ** copy command is less than the amount of literal text to be copied.
+ */
+ int cnt, ofst, litsz;
+ int j, k, x, y;
+ int sz;
+
+ /* Beginning at iSrc, match forwards as far as we can. j counts
+ ** the number of characters that match */
+ iSrc = iBlock*NHASH;
+ for(
+ j=0, x=iSrc, y=base+i;
+ (unsigned int)x<lenSrc && (unsigned int)y<lenOut;
+ j++, x++, y++
+ ){
+ if( zSrc[x]!=zOut[y] ) break;
+ }
+ j--;
+
+ /* Beginning at iSrc-1, match backwards as far as we can. k counts
+ ** the number of characters that match */
+ for(k=1; k<iSrc && (unsigned int)k<=i; k++){
+ if( zSrc[iSrc-k]!=zOut[base+i-k] ) break;
+ }
+ k--;
+
+ /* Compute the offset and size of the matching region */
+ ofst = iSrc-k;
+ cnt = j+k+1;
+ litsz = i-k; /* Number of bytes of literal text before the copy */
+ /* sz will hold the number of bytes needed to encode the "insert"
+ ** command and the copy command, not counting the "insert" text */
+ sz = digit_count(i-k)+digit_count(cnt)+digit_count(ofst)+3;
+ if( cnt>=sz && cnt>bestCnt ){
+ /* Remember this match only if it is the best so far and it
+ ** does not increase the file size */
+ bestCnt = cnt;
+ bestOfst = iSrc-k;
+ bestLitsz = litsz;
+ }
+
+ /* Check the next matching block */
+ iBlock = collide[iBlock];
+ }
+
+ /* We have a copy command that does not cause the delta to be larger
+ ** than a literal insert. So add the copy command to the delta.
+ */
+ if( bestCnt>0 ){
+ if( bestLitsz>0 ){
+ /* Add an insert command before the copy */
+ putInt(bestLitsz,&zDelta);
+ *(zDelta++) = ':';
+ memcpy(zDelta, &zOut[base], bestLitsz);
+ zDelta += bestLitsz;
+ base += bestLitsz;
+ }
+ base += bestCnt;
+ putInt(bestCnt, &zDelta);
+ *(zDelta++) = '@';
+ putInt(bestOfst, &zDelta);
+ *(zDelta++) = ',';
+ if( bestOfst + bestCnt -1 > lastRead ){
+ lastRead = bestOfst + bestCnt - 1;
+ }
+ bestCnt = 0;
+ break;
+ }
+
+ /* If we reach this point, it means no match is found so far */
+ if( base+i+NHASH>=lenOut ){
+ /* We have reached the end of the file and have not found any
+ ** matches. Do an "insert" for everything that does not match */
+ putInt(lenOut-base, &zDelta);
+ *(zDelta++) = ':';
+ memcpy(zDelta, &zOut[base], lenOut-base);
+ zDelta += lenOut-base;
+ base = lenOut;
+ break;
+ }
+
+ /* Advance the hash by one character. Keep looking for a match */
+ hash_next(&h, zOut[base+i+NHASH]);
+ i++;
+ }
+ }
+ /* Output a final "insert" record to get all the text at the end of
+ ** the file that does not match anything in the source file.
+ */
+ if( base<lenOut ){
+ putInt(lenOut-base, &zDelta);
+ *(zDelta++) = ':';
+ memcpy(zDelta, &zOut[base], lenOut-base);
+ zDelta += lenOut-base;
+ }
+ /* Output the final checksum record. */
+ putInt(checksum(zOut, lenOut), &zDelta);
+ *(zDelta++) = ';';
+ sqlite3_free(collide);
+ return zDelta - zOrigDelta;
+}
+
+/*
+** End of code copied from fossil.
+**************************************************************************/
+
+static void strPrintfArray(
+ Str *pStr, /* String object to append to */
+ const char *zSep, /* Separator string */
+ const char *zFmt, /* Format for each entry */
+ char **az, int n /* Array of strings & its size (or -1) */
+){
+ int i;
+ for(i=0; az[i] && (i<n || n<0); i++){
+ if( i!=0 ) strPrintf(pStr, "%s", zSep);
+ strPrintf(pStr, zFmt, az[i], az[i], az[i]);
+ }
+}
+
+static void getRbudiffQuery(
+ const char *zTab,
+ char **azCol,
+ int nPK,
+ int bOtaRowid,
+ Str *pSql
+){
+ int i;
+
+ /* First the newly inserted rows: **/
+ strPrintf(pSql, "SELECT ");
+ strPrintfArray(pSql, ", ", "%s", azCol, -1);
+ strPrintf(pSql, ", 0, "); /* Set ota_control to 0 for an insert */
+ strPrintfArray(pSql, ", ", "NULL", azCol, -1);
+ strPrintf(pSql, " FROM aux.%Q AS n WHERE NOT EXISTS (\n", zTab);
+ strPrintf(pSql, " SELECT 1 FROM ", zTab);
+ strPrintf(pSql, " main.%Q AS o WHERE ", zTab);
+ strPrintfArray(pSql, " AND ", "(n.%Q IS o.%Q)", azCol, nPK);
+ strPrintf(pSql, "\n)");
+
+ /* Deleted rows: */
+ strPrintf(pSql, "\nUNION ALL\nSELECT ");
+ strPrintfArray(pSql, ", ", "%s", azCol, nPK);
+ if( azCol[nPK] ){
+ strPrintf(pSql, ", ");
+ strPrintfArray(pSql, ", ", "NULL", &azCol[nPK], -1);
+ }
+ strPrintf(pSql, ", 1, "); /* Set ota_control to 1 for a delete */
+ strPrintfArray(pSql, ", ", "NULL", azCol, -1);
+ strPrintf(pSql, " FROM main.%Q AS n WHERE NOT EXISTS (\n", zTab);
+ strPrintf(pSql, " SELECT 1 FROM ", zTab);
+ strPrintf(pSql, " aux.%Q AS o WHERE ", zTab);
+ strPrintfArray(pSql, " AND ", "(n.%Q IS o.%Q)", azCol, nPK);
+ strPrintf(pSql, "\n) ");
+
+ /* Updated rows. If all table columns are part of the primary key, there
+ ** can be no updates. In this case this part of the compound SELECT can
+ ** be omitted altogether. */
+ if( azCol[nPK] ){
+ strPrintf(pSql, "\nUNION ALL\nSELECT ");
+ strPrintfArray(pSql, ", ", "n.%s", azCol, nPK);
+ strPrintf(pSql, ",\n");
+ strPrintfArray(pSql, " ,\n",
+ " CASE WHEN n.%s IS o.%s THEN NULL ELSE n.%s END", &azCol[nPK], -1
+ );
+
+ if( bOtaRowid==0 ){
+ strPrintf(pSql, ", '");
+ strPrintfArray(pSql, "", ".", azCol, nPK);
+ strPrintf(pSql, "' ||\n");
+ }else{
+ strPrintf(pSql, ",\n");
+ }
+ strPrintfArray(pSql, " ||\n",
+ " CASE WHEN n.%s IS o.%s THEN '.' ELSE 'x' END", &azCol[nPK], -1
+ );
+ strPrintf(pSql, "\nAS ota_control, ");
+ strPrintfArray(pSql, ", ", "NULL", azCol, nPK);
+ strPrintf(pSql, ",\n");
+ strPrintfArray(pSql, " ,\n",
+ " CASE WHEN n.%s IS o.%s THEN NULL ELSE o.%s END", &azCol[nPK], -1
+ );
+
+ strPrintf(pSql, "\nFROM main.%Q AS o, aux.%Q AS n\nWHERE ", zTab, zTab);
+ strPrintfArray(pSql, " AND ", "(n.%Q IS o.%Q)", azCol, nPK);
+ strPrintf(pSql, " AND ota_control LIKE '%%x%%'");
+ }
+
+ /* Now add an ORDER BY clause to sort everything by PK. */
+ strPrintf(pSql, "\nORDER BY ");
+ for(i=1; i<=nPK; i++) strPrintf(pSql, "%s%d", ((i>1)?", ":""), i);
+}
+
+static void rbudiff_one_table(const char *zTab, FILE *out){
+ int bOtaRowid; /* True to use an ota_rowid column */
+ int nPK; /* Number of primary key columns in table */
+ char **azCol; /* NULL terminated array of col names */
+ int i;
+ int nCol;
+ Str ct = {0, 0, 0}; /* The "CREATE TABLE data_xxx" statement */
+ Str sql = {0, 0, 0}; /* Query to find differences */
+ Str insert = {0, 0, 0}; /* First part of output INSERT statement */
+ sqlite3_stmt *pStmt = 0;
+
+ /* --rbu mode must use real primary keys. */
+ g.bSchemaPK = 1;
+
+ /* Check that the schemas of the two tables match. Exit early otherwise. */
+ checkSchemasMatch(zTab);
+
+ /* Grab the column names and PK details for the table(s). If no usable PK
+ ** columns are found, bail out early. */
+ azCol = columnNames("main", zTab, &nPK, &bOtaRowid);
+ if( azCol==0 ){
+ runtimeError("table %s has no usable PK columns", zTab);
+ }
+ for(nCol=0; azCol[nCol]; nCol++);
+
+ /* Build and output the CREATE TABLE statement for the data_xxx table */
+ strPrintf(&ct, "CREATE TABLE IF NOT EXISTS 'data_%q'(", zTab);
+ if( bOtaRowid ) strPrintf(&ct, "rbu_rowid, ");
+ strPrintfArray(&ct, ", ", "%s", &azCol[bOtaRowid], -1);
+ strPrintf(&ct, ", rbu_control);");
+
+ /* Get the SQL for the query to retrieve data from the two databases */
+ getRbudiffQuery(zTab, azCol, nPK, bOtaRowid, &sql);
+
+ /* Build the first part of the INSERT statement output for each row
+ ** in the data_xxx table. */
+ strPrintf(&insert, "INSERT INTO 'data_%q' (", zTab);
+ if( bOtaRowid ) strPrintf(&insert, "rbu_rowid, ");
+ strPrintfArray(&insert, ", ", "%s", &azCol[bOtaRowid], -1);
+ strPrintf(&insert, ", rbu_control) VALUES(");
+
+ pStmt = db_prepare("%s", sql.z);
+
+ while( sqlite3_step(pStmt)==SQLITE_ROW ){
+
+ /* If this is the first row output, print out the CREATE TABLE
+ ** statement first. And then set ct.z to NULL so that it is not
+ ** printed again. */
+ if( ct.z ){
+ fprintf(out, "%s\n", ct.z);
+ strFree(&ct);
+ }
+
+ /* Output the first part of the INSERT statement */
+ fprintf(out, "%s", insert.z);
+
+ if( sqlite3_column_type(pStmt, nCol)==SQLITE_INTEGER ){
+ for(i=0; i<=nCol; i++){
+ if( i>0 ) fprintf(out, ", ");
+ printQuoted(out, sqlite3_column_value(pStmt, i));
+ }
+ }else{
+ char *zOtaControl;
+ int nOtaControl = sqlite3_column_bytes(pStmt, nCol);
+
+ zOtaControl = (char*)sqlite3_malloc(nOtaControl);
+ memcpy(zOtaControl, sqlite3_column_text(pStmt, nCol), nOtaControl+1);
+
+ for(i=0; i<nCol; i++){
+ int bDone = 0;
+ if( i>=nPK
+ && sqlite3_column_type(pStmt, i)==SQLITE_BLOB
+ && sqlite3_column_type(pStmt, nCol+1+i)==SQLITE_BLOB
+ ){
+ const char *aSrc = sqlite3_column_blob(pStmt, nCol+1+i);
+ int nSrc = sqlite3_column_bytes(pStmt, nCol+1+i);
+ const char *aFinal = sqlite3_column_blob(pStmt, i);
+ int nFinal = sqlite3_column_bytes(pStmt, i);
+ char *aDelta;
+ int nDelta;
+
+ aDelta = sqlite3_malloc(nFinal + 60);
+ nDelta = rbuDeltaCreate(aSrc, nSrc, aFinal, nFinal, aDelta);
+ if( nDelta<nFinal ){
+ int j;
+ fprintf(out, "x'");
+ for(j=0; j<nDelta; j++) fprintf(out, "%02x", (u8)aDelta[j]);
+ fprintf(out, "'");
+ zOtaControl[i-bOtaRowid] = 'f';
+ bDone = 1;
+ }
+ sqlite3_free(aDelta);
+ }
+
+ if( bDone==0 ){
+ printQuoted(out, sqlite3_column_value(pStmt, i));
+ }
+ fprintf(out, ", ");
+ }
+ fprintf(out, "'%s'", zOtaControl);
+ sqlite3_free(zOtaControl);
+ }
+
+ /* And the closing bracket of the insert statement */
+ fprintf(out, ");\n");
+ }
+
+ sqlite3_finalize(pStmt);
+
+ strFree(&ct);
+ strFree(&sql);
+ strFree(&insert);
+}
+
+/*
+** Display a summary of differences between two versions of the same
+** table table.
+**
+** * Number of rows changed
+** * Number of rows added
+** * Number of rows deleted
+** * Number of identical rows
+*/
+static void summarize_one_table(const char *zTab, FILE *out){
+ char *zId = safeId(zTab); /* Name of table (translated for us in SQL) */
+ char **az = 0; /* Columns in main */
+ char **az2 = 0; /* Columns in aux */
+ int nPk; /* Primary key columns in main */
+ int nPk2; /* Primary key columns in aux */
+ int n = 0; /* Number of columns in main */
+ int n2; /* Number of columns in aux */
+ int i; /* Loop counter */
+ const char *zSep; /* Separator string */
+ Str sql; /* Comparison query */
+ sqlite3_stmt *pStmt; /* Query statement to do the diff */
+ sqlite3_int64 nUpdate; /* Number of updated rows */
+ sqlite3_int64 nUnchanged; /* Number of unmodified rows */
+ sqlite3_int64 nDelete; /* Number of deleted rows */
+ sqlite3_int64 nInsert; /* Number of inserted rows */
+
+ strInit(&sql);
+ if( sqlite3_table_column_metadata(g.db,"aux",zTab,0,0,0,0,0,0) ){
+ if( !sqlite3_table_column_metadata(g.db,"main",zTab,0,0,0,0,0,0) ){
+ /* Table missing from second database. */
+ fprintf(out, "%s: missing from second database\n", zTab);
+ }
+ goto end_summarize_one_table;
+ }
+
+ if( sqlite3_table_column_metadata(g.db,"main",zTab,0,0,0,0,0,0) ){
+ /* Table missing from source */
+ fprintf(out, "%s: missing from first database\n", zTab);
+ goto end_summarize_one_table;
+ }
+
+ az = columnNames("main", zTab, &nPk, 0);
+ az2 = columnNames("aux", zTab, &nPk2, 0);
+ if( az && az2 ){
+ for(n=0; az[n]; n++){
+ if( sqlite3_stricmp(az[n],az2[n])!=0 ) break;
+ }
+ }
+ if( az==0
+ || az2==0
+ || nPk!=nPk2
+ || az[n]
+ ){
+ /* Schema mismatch */
+ fprintf(out, "%s: incompatible schema\n", zTab);
+ goto end_summarize_one_table;
+ }
+
+ /* Build the comparison query */
+ for(n2=n; az[n2]; n2++){}
+ strPrintf(&sql, "SELECT 1, count(*)");
+ if( n2==nPk2 ){
+ strPrintf(&sql, ", 0\n");
+ }else{
+ zSep = ", sum(";
+ for(i=nPk; az[i]; i++){
+ strPrintf(&sql, "%sA.%s IS NOT B.%s", zSep, az[i], az[i]);
+ zSep = " OR ";
+ }
+ strPrintf(&sql, ")\n");
+ }
+ strPrintf(&sql, " 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, az[i], az[i]);
+ zSep = " AND";
+ }
+ strPrintf(&sql, " UNION ALL\n");
+ strPrintf(&sql, "SELECT 2, count(*), 0\n");
+ strPrintf(&sql, " FROM main.%s A\n", zId);
+ strPrintf(&sql, " WHERE NOT EXISTS(SELECT 1 FROM aux.%s B ", zId);
+ zSep = "WHERE";
+ for(i=0; i<nPk; i++){
+ strPrintf(&sql, "%s A.%s=B.%s", zSep, az[i], az[i]);
+ zSep = " AND";
+ }
+ strPrintf(&sql, ")\n");
+ strPrintf(&sql, " UNION ALL\n");
+ strPrintf(&sql, "SELECT 3, count(*), 0\n");
+ strPrintf(&sql, " FROM aux.%s B\n", zId);
+ strPrintf(&sql, " WHERE NOT EXISTS(SELECT 1 FROM main.%s A ", zId);
+ zSep = "WHERE";
+ for(i=0; i<nPk; i++){
+ strPrintf(&sql, "%s A.%s=B.%s", zSep, az[i], az[i]);
+ zSep = " AND";
+ }
+ strPrintf(&sql, ")\n ORDER BY 1;\n");
+
+ if( (g.fDebug & DEBUG_DIFF_SQL)!=0 ){
+ printf("SQL for %s:\n%s\n", zId, sql.z);
+ goto end_summarize_one_table;
+ }
+
+ /* Run the query and output difference summary */
+ pStmt = db_prepare(sql.z);
+ nUpdate = 0;
+ nInsert = 0;
+ nDelete = 0;
+ nUnchanged = 0;
+ while( SQLITE_ROW==sqlite3_step(pStmt) ){
+ switch( sqlite3_column_int(pStmt,0) ){
+ case 1:
+ nUpdate = sqlite3_column_int64(pStmt,2);
+ nUnchanged = sqlite3_column_int64(pStmt,1) - nUpdate;
+ break;
+ case 2:
+ nDelete = sqlite3_column_int64(pStmt,1);
+ break;
+ case 3:
+ nInsert = sqlite3_column_int64(pStmt,1);
+ break;
+ }
+ }
+ sqlite3_finalize(pStmt);
+ fprintf(out, "%s: %lld changes, %lld inserts, %lld deletes, %lld unchanged\n",
+ zTab, nUpdate, nInsert, nDelete, nUnchanged);
+
+end_summarize_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 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_double(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,(size_t)iX,out);
+ break;
+ case SQLITE_BLOB:
+ iX = sqlite3_value_bytes(pVal);
+ putsVarint(out, (sqlite3_uint64)iX);
+ fwrite(sqlite3_value_blob(pVal),1,(size_t)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 */
+
+ /* Check that the schemas of the two tables match. Exit early otherwise. */
+ checkSchemasMatch(zTab);
+
+ pStmt = db_prepare("PRAGMA main.table_info=%Q", zTab);
+ while( SQLITE_ROW==sqlite3_step(pStmt) ){
+ nCol++;
+ azCol = sqlite3_realloc(azCol, sizeof(char*)*nCol);
+ if( azCol==0 ) runtimeError("out of memory");
+ aiFlg = sqlite3_realloc(aiFlg, sizeof(int)*nCol);
+ if( aiFlg==0 ) runtimeError("out of memory");
+ azCol[nCol-1] = safeId((const char*)sqlite3_column_text(pStmt,1));
+ aiFlg[nCol-1] = i = sqlite3_column_int(pStmt,5);
+ if( i>0 ){
+ if( i>nPk ){
+ nPk = i;
+ aiPk = sqlite3_realloc(aiPk, sizeof(int)*nPk);
+ if( aiPk==0 ) runtimeError("out of memory");
+ }
+ 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++){
+ 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]);
+ sqlite3_free(azCol);
+ sqlite3_free(aiPk);
+ sqlite3_free(zId);
+}
+
+/*
+** Print sketchy documentation for this utility program
+*/
+static void showHelp(void){
+ printf("Usage: %s [options] DB1 DB2\n", g.zArgv0);
+ printf(
+"Output SQL text that would transform DB1 into DB2.\n"
+"Options:\n"
+" --changeset FILE Write a CHANGESET into FILE\n"
+" -L|--lib LIBRARY Load an SQLite extension library\n"
+" --primarykey Use schema-defined PRIMARY KEYs\n"
+" --rbu Output SQL to create/populate RBU table(s)\n"
+" --schema Show only differences in the schema\n"
+" --summary Show only a summary of the differences\n"
+" --table TAB Show only differences in table TAB\n"
+" --transaction Show SQL output inside a transaction\n"
+ );
+}
+
+int main(int argc, char **argv){
+ const char *zDb1 = 0;
+ const char *zDb2 = 0;
+ int i;
+ int rc;
+ char *zErrMsg = 0;
+ char *zSql;
+ sqlite3_stmt *pStmt;
+ char *zTab = 0;
+ FILE *out = stdout;
+ void (*xDiff)(const char*,FILE*) = diff_one_table;
+ int nExt = 0;
+ char **azExt = 0;
+ int useTransaction = 0;
+ int neverUseTransaction = 0;
+
+ g.zArgv0 = argv[0];
+ sqlite3_config(SQLITE_CONFIG_SINGLETHREAD);
+ for(i=1; i<argc; i++){
+ const char *z = argv[i];
+ if( z[0]=='-' ){
+ z++;
+ if( z[0]=='-' ) z++;
+ if( strcmp(z,"changeset")==0 ){
+ if( i==argc-1 ) cmdlineError("missing argument to %s", argv[i]);
+ out = fopen(argv[++i], "wb");
+ if( out==0 ) cmdlineError("cannot open: %s", argv[i]);
+ xDiff = changeset_one_table;
+ neverUseTransaction = 1;
+ }else
+ if( strcmp(z,"debug")==0 ){
+ if( i==argc-1 ) cmdlineError("missing argument to %s", argv[i]);
+ g.fDebug = strtol(argv[++i], 0, 0);
+ }else
+ if( strcmp(z,"help")==0 ){
+ showHelp();
+ return 0;
+ }else
+#ifndef SQLITE_OMIT_LOAD_EXTENSION
+ if( strcmp(z,"lib")==0 || strcmp(z,"L")==0 ){
+ if( i==argc-1 ) cmdlineError("missing argument to %s", argv[i]);
+ azExt = realloc(azExt, sizeof(azExt[0])*(nExt+1));
+ if( azExt==0 ) cmdlineError("out of memory");
+ azExt[nExt++] = argv[++i];
+ }else
+#endif
+ if( strcmp(z,"primarykey")==0 ){
+ g.bSchemaPK = 1;
+ }else
+ if( strcmp(z,"rbu")==0 ){
+ xDiff = rbudiff_one_table;
+ }else
+ if( strcmp(z,"schema")==0 ){
+ g.bSchemaOnly = 1;
+ }else
+ if( strcmp(z,"summary")==0 ){
+ xDiff = summarize_one_table;
+ }else
+ if( strcmp(z,"table")==0 ){
+ if( i==argc-1 ) cmdlineError("missing argument to %s", argv[i]);
+ zTab = argv[++i];
+ }else
+ if( strcmp(z,"transaction")==0 ){
+ useTransaction = 1;
+ }else
+ {
+ cmdlineError("unknown option: %s", argv[i]);
+ }
+ }else if( zDb1==0 ){
+ zDb1 = argv[i];
+ }else if( zDb2==0 ){
+ zDb2 = argv[i];
+ }else{
+ cmdlineError("unknown argument: %s", argv[i]);
+ }
+ }
+ if( zDb2==0 ){
+ cmdlineError("two database arguments required");
+ }
+ rc = sqlite3_open(zDb1, &g.db);
+ if( rc ){
+ cmdlineError("cannot open database file \"%s\"", zDb1);
+ }
+ rc = sqlite3_exec(g.db, "SELECT * FROM sqlite_master", 0, 0, &zErrMsg);
+ if( rc || zErrMsg ){
+ cmdlineError("\"%s\" does not appear to be a valid SQLite database", zDb1);
+ }
+#ifndef SQLITE_OMIT_LOAD_EXTENSION
+ sqlite3_enable_load_extension(g.db, 1);
+ for(i=0; i<nExt; i++){
+ rc = sqlite3_load_extension(g.db, azExt[i], 0, &zErrMsg);
+ if( rc || zErrMsg ){
+ cmdlineError("error loading %s: %s", azExt[i], zErrMsg);
+ }
+ }
+#endif
+ free(azExt);
+ zSql = sqlite3_mprintf("ATTACH %Q as aux;", zDb2);
+ rc = sqlite3_exec(g.db, zSql, 0, 0, &zErrMsg);
+ if( rc || zErrMsg ){
+ cmdlineError("cannot attach database \"%s\"", zDb2);
+ }
+ rc = sqlite3_exec(g.db, "SELECT * FROM aux.sqlite_master", 0, 0, &zErrMsg);
+ if( rc || zErrMsg ){
+ cmdlineError("\"%s\" does not appear to be a valid SQLite database", zDb2);
+ }
+
+ if( neverUseTransaction ) useTransaction = 0;
+ if( useTransaction ) printf("BEGIN TRANSACTION;\n");
+ if( zTab ){
+ xDiff(zTab, out);
+ }else{
+ /* Handle tables one by one */
+ pStmt = db_prepare(
+ "SELECT name FROM main.sqlite_master\n"
+ " WHERE type='table' AND sql NOT LIKE 'CREATE VIRTUAL%%'\n"
+ " UNION\n"
+ "SELECT name FROM aux.sqlite_master\n"
+ " WHERE type='table' AND sql NOT LIKE 'CREATE VIRTUAL%%'\n"
+ " ORDER BY name"
+ );
+ while( SQLITE_ROW==sqlite3_step(pStmt) ){
+ xDiff((const char*)sqlite3_column_text(pStmt,0), out);
+ }
+ sqlite3_finalize(pStmt);
+ }
+ if( useTransaction ) printf("COMMIT;\n");
+
+ /* TBD: Handle trigger differences */
+ /* TBD: Handle view differences */
+ sqlite3_close(g.db);
+ return 0;
+}
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