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Overview
Comment: | Enhance the ".imposter" command in the CLI so that the first argument can be an existing WITHOUT ROWID table instead of an index. The resulting imposter is the same table, but with columns in storage order and with all constraints removed. |
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Downloads: | Tarball | ZIP archive |
Timelines: | family | ancestors | descendants | both | trunk |
Files: | files | file ages | folders |
SHA3-256: |
9dc0d34586eebf6705d9bd81494c417a |
User & Date: | drh 2019-10-18 15:58:50.284 |
Context
2019-10-20
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08:26 | Fix a resource leak in fts5 that could occur if an auxiliary function is called from within a query that does not use the full-text index. (check-in: b528bdcd45 user: dan tags: trunk) | |
2019-10-18
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17:47 | Merge trunk enhancements into the generated-columns branch. (check-in: 85bc4524d7 user: drh tags: generated-columns) | |
15:58 | Enhance the ".imposter" command in the CLI so that the first argument can be an existing WITHOUT ROWID table instead of an index. The resulting imposter is the same table, but with columns in storage order and with all constraints removed. (check-in: 9dc0d34586 user: drh tags: trunk) | |
2019-10-17
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15:41 | Avoid an infinite loop in fts3/4 incremental-merge in the case where the lowest level in the database contains segments but no data (because there is a delete-marker for each valid entry). Fix for [bf1aab89]. (check-in: 35beaee059 user: dan tags: trunk) | |
Changes
Changes to src/shell.c.in.
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7754 7755 7756 7757 7758 7759 7760 7761 7762 7763 7764 7765 7766 7767 7768 7769 7770 7771 7772 | #ifndef SQLITE_UNTESTABLE if( c=='i' && strncmp(azArg[0], "imposter", n)==0 ){ char *zSql; char *zCollist = 0; sqlite3_stmt *pStmt; int tnum = 0; int i; if( !(nArg==3 || (nArg==2 && sqlite3_stricmp(azArg[1],"off")==0)) ){ utf8_printf(stderr, "Usage: .imposter INDEX IMPOSTER\n" " .imposter off\n"); rc = 1; goto meta_command_exit; } open_db(p, 0); if( nArg==2 ){ sqlite3_test_control(SQLITE_TESTCTRL_IMPOSTER, p->db, "main", 0, 1); goto meta_command_exit; } | > > > > > > > > > | > | > > > > > > > < < < < < > > > > > > > > > > | | | > | 7754 7755 7756 7757 7758 7759 7760 7761 7762 7763 7764 7765 7766 7767 7768 7769 7770 7771 7772 7773 7774 7775 7776 7777 7778 7779 7780 7781 7782 7783 7784 7785 7786 7787 7788 7789 7790 7791 7792 7793 7794 7795 7796 7797 7798 7799 7800 7801 7802 7803 7804 7805 7806 7807 7808 7809 7810 7811 7812 7813 7814 7815 7816 7817 7818 7819 7820 7821 7822 7823 7824 7825 7826 7827 7828 7829 7830 7831 7832 7833 7834 7835 7836 7837 7838 7839 7840 7841 7842 7843 7844 7845 7846 7847 7848 7849 7850 7851 7852 | #ifndef SQLITE_UNTESTABLE if( c=='i' && strncmp(azArg[0], "imposter", n)==0 ){ char *zSql; char *zCollist = 0; sqlite3_stmt *pStmt; int tnum = 0; int isWO = 0; /* True if making an imposter of a WITHOUT ROWID table */ int lenPK = 0; /* Length of the PRIMARY KEY string for isWO tables */ int i; if( !(nArg==3 || (nArg==2 && sqlite3_stricmp(azArg[1],"off")==0)) ){ utf8_printf(stderr, "Usage: .imposter INDEX IMPOSTER\n" " .imposter off\n"); /* Also allowed, but not documented: ** ** .imposter TABLE IMPOSTER ** ** where TABLE is a WITHOUT ROWID table. In that case, the ** imposter is another WITHOUT ROWID table with the columns in ** storage order. */ rc = 1; goto meta_command_exit; } open_db(p, 0); if( nArg==2 ){ sqlite3_test_control(SQLITE_TESTCTRL_IMPOSTER, p->db, "main", 0, 1); goto meta_command_exit; } zSql = sqlite3_mprintf( "SELECT rootpage, 0 FROM sqlite_master" " WHERE name='%q' AND type='index'" "UNION ALL " "SELECT rootpage, 1 FROM sqlite_master" " WHERE name='%q' AND type='table'" " AND sql LIKE '%%without%%rowid%%'", azArg[1], azArg[1] ); sqlite3_prepare_v2(p->db, zSql, -1, &pStmt, 0); sqlite3_free(zSql); if( sqlite3_step(pStmt)==SQLITE_ROW ){ tnum = sqlite3_column_int(pStmt, 0); isWO = sqlite3_column_int(pStmt, 1); } sqlite3_finalize(pStmt); zSql = sqlite3_mprintf("PRAGMA index_xinfo='%q'", azArg[1]); rc = sqlite3_prepare_v2(p->db, zSql, -1, &pStmt, 0); sqlite3_free(zSql); i = 0; while( sqlite3_step(pStmt)==SQLITE_ROW ){ char zLabel[20]; const char *zCol = (const char*)sqlite3_column_text(pStmt,2); i++; if( zCol==0 ){ if( sqlite3_column_int(pStmt,1)==-1 ){ zCol = "_ROWID_"; }else{ sqlite3_snprintf(sizeof(zLabel),zLabel,"expr%d",i); zCol = zLabel; } } if( isWO && lenPK==0 && sqlite3_column_int(pStmt,5)==0 && zCollist ){ lenPK = (int)strlen(zCollist); } if( zCollist==0 ){ zCollist = sqlite3_mprintf("\"%w\"", zCol); }else{ zCollist = sqlite3_mprintf("%z,\"%w\"", zCollist, zCol); } } sqlite3_finalize(pStmt); if( i==0 || tnum==0 ){ utf8_printf(stderr, "no such index: \"%s\"\n", azArg[1]); rc = 1; sqlite3_free(zCollist); goto meta_command_exit; } if( lenPK==0 ) lenPK = 100000; zSql = sqlite3_mprintf( "CREATE TABLE \"%w\"(%s,PRIMARY KEY(%.*s))WITHOUT ROWID", azArg[2], zCollist, lenPK, zCollist); sqlite3_free(zCollist); rc = sqlite3_test_control(SQLITE_TESTCTRL_IMPOSTER, p->db, "main", 1, tnum); if( rc==SQLITE_OK ){ rc = sqlite3_exec(p->db, zSql, 0, 0, 0); sqlite3_test_control(SQLITE_TESTCTRL_IMPOSTER, p->db, "main", 0, 0); if( rc ){ utf8_printf(stderr, "Error in [%s]: %s\n", zSql, sqlite3_errmsg(p->db)); }else{ utf8_printf(stdout, "%s;\n", zSql); raw_printf(stdout, "WARNING: writing to an imposter table will corrupt the \"%s\" %s!\n", azArg[1], isWO ? "table" : "index" ); } }else{ raw_printf(stderr, "SQLITE_TESTCTRL_IMPOSTER returns %d\n", rc); rc = 1; } sqlite3_free(zSql); |
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