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Overview
| Comment: | Use the 2-argument version of substr() in the SQL contained in the VACUUM and ALTER TABLE commands. Ticket #2737. (CVS 4499) |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
82b08a3dc2366007bcac4d9e451ef61c |
| User & Date: | drh 2007-10-20 20:58:57 |
Context
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2007-10-21
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| 22:47 | Finally bring OS/2 to the 3.5 level. This at least is a first draft version that survives very basic tests. It still contains a lot of debugging stuff... (CVS 4500) check-in: 46b2d103 user: pweilbacher tags: trunk | |
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2007-10-20
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| 20:58 | Use the 2-argument version of substr() in the SQL contained in the VACUUM and ALTER TABLE commands. Ticket #2737. (CVS 4499) check-in: 82b08a3d user: drh tags: trunk | |
| 16:36 | Add the new memory allocator to the amalgamation. Improvements to out-of-memory handling. (CVS 4498) check-in: b58c2b37 user: drh tags: trunk | |
Changes
Changes to src/alter.c.
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** May you find forgiveness for yourself and forgive others. ** May you share freely, never taking more than you give. ** ************************************************************************* ** This file contains C code routines that used to generate VDBE code ** that implements the ALTER TABLE command. ** ** $Id: alter.c,v 1.32 2007/08/29 14:06:23 danielk1977 Exp $ */ #include "sqliteInt.h" #include <ctype.h> /* ** The code in this file only exists if we are not omitting the ** ALTER TABLE logic from the build. ................................................................................ "WHEN type = 'trigger' THEN sqlite_rename_trigger(sql, %Q)" "ELSE sqlite_rename_table(sql, %Q) END, " #endif "tbl_name = %Q, " "name = CASE " "WHEN type='table' THEN %Q " "WHEN name LIKE 'sqlite_autoindex%%' AND type='index' THEN " "'sqlite_autoindex_' || %Q || substr(name,%d+18,10) " "ELSE name END " "WHERE tbl_name=%Q AND " "(type='table' OR type='index' OR type='trigger');", zDb, SCHEMA_TABLE(iDb), zName, zName, zName, #ifndef SQLITE_OMIT_TRIGGER zName, #endif ................................................................................ if( zCol ){ char *zEnd = &zCol[pColDef->n-1]; while( (zEnd>zCol && *zEnd==';') || isspace(*(unsigned char *)zEnd) ){ *zEnd-- = '\0'; } sqlite3NestedParse(pParse, "UPDATE %Q.%s SET " "sql = substr(sql,1,%d) || ', ' || %Q || substr(sql,%d,length(sql)) " "WHERE type = 'table' AND name = %Q", zDb, SCHEMA_TABLE(iDb), pNew->addColOffset, zCol, pNew->addColOffset+1, zTab ); sqlite3_free(zCol); } |
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** May you find forgiveness for yourself and forgive others. ** May you share freely, never taking more than you give. ** ************************************************************************* ** This file contains C code routines that used to generate VDBE code ** that implements the ALTER TABLE command. ** ** $Id: alter.c,v 1.33 2007/10/20 20:58:57 drh Exp $ */ #include "sqliteInt.h" #include <ctype.h> /* ** The code in this file only exists if we are not omitting the ** ALTER TABLE logic from the build. ................................................................................ "WHEN type = 'trigger' THEN sqlite_rename_trigger(sql, %Q)" "ELSE sqlite_rename_table(sql, %Q) END, " #endif "tbl_name = %Q, " "name = CASE " "WHEN type='table' THEN %Q " "WHEN name LIKE 'sqlite_autoindex%%' AND type='index' THEN " "'sqlite_autoindex_' || %Q || substr(name,%d+18) " "ELSE name END " "WHERE tbl_name=%Q AND " "(type='table' OR type='index' OR type='trigger');", zDb, SCHEMA_TABLE(iDb), zName, zName, zName, #ifndef SQLITE_OMIT_TRIGGER zName, #endif ................................................................................ if( zCol ){ char *zEnd = &zCol[pColDef->n-1]; while( (zEnd>zCol && *zEnd==';') || isspace(*(unsigned char *)zEnd) ){ *zEnd-- = '\0'; } sqlite3NestedParse(pParse, "UPDATE %Q.%s SET " "sql = substr(sql,1,%d) || ', ' || %Q || substr(sql,%d) " "WHERE type = 'table' AND name = %Q", zDb, SCHEMA_TABLE(iDb), pNew->addColOffset, zCol, pNew->addColOffset+1, zTab ); sqlite3_free(zCol); } |
Changes to src/vacuum.c.
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** ************************************************************************* ** This file contains code used to implement the VACUUM command. ** ** Most of the code in this file may be omitted by defining the ** SQLITE_OMIT_VACUUM macro. ** ** $Id: vacuum.c,v 1.73 2007/08/29 12:31:28 danielk1977 Exp $ */ #include "sqliteInt.h" #include "vdbeInt.h" #if !defined(SQLITE_OMIT_VACUUM) && !defined(SQLITE_OMIT_ATTACH) /* ** Execute zSql on database db. Return an error code. ................................................................................ rc = execSql(db, "BEGIN EXCLUSIVE;"); if( rc!=SQLITE_OK ) goto end_of_vacuum; /* Query the schema of the main database. Create a mirror schema ** in the temporary database. */ rc = execExecSql(db, "SELECT 'CREATE TABLE vacuum_db.' || substr(sql,14,100000000) " " FROM sqlite_master WHERE type='table' AND name!='sqlite_sequence'" " AND rootpage>0" ); if( rc!=SQLITE_OK ) goto end_of_vacuum; rc = execExecSql(db, "SELECT 'CREATE INDEX vacuum_db.' || substr(sql,14,100000000)" " FROM sqlite_master WHERE sql LIKE 'CREATE INDEX %' "); if( rc!=SQLITE_OK ) goto end_of_vacuum; rc = execExecSql(db, "SELECT 'CREATE UNIQUE INDEX vacuum_db.' || substr(sql,21,100000000) " " FROM sqlite_master WHERE sql LIKE 'CREATE UNIQUE INDEX %'"); if( rc!=SQLITE_OK ) goto end_of_vacuum; /* Loop through the tables in the main database. For each, do ** an "INSERT INTO vacuum_db.xxx SELECT * FROM xxx;" to copy ** the contents to the temporary database. */ |
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** ************************************************************************* ** This file contains code used to implement the VACUUM command. ** ** Most of the code in this file may be omitted by defining the ** SQLITE_OMIT_VACUUM macro. ** ** $Id: vacuum.c,v 1.74 2007/10/20 20:58:57 drh Exp $ */ #include "sqliteInt.h" #include "vdbeInt.h" #if !defined(SQLITE_OMIT_VACUUM) && !defined(SQLITE_OMIT_ATTACH) /* ** Execute zSql on database db. Return an error code. ................................................................................ rc = execSql(db, "BEGIN EXCLUSIVE;"); if( rc!=SQLITE_OK ) goto end_of_vacuum; /* Query the schema of the main database. Create a mirror schema ** in the temporary database. */ rc = execExecSql(db, "SELECT 'CREATE TABLE vacuum_db.' || substr(sql,14) " " FROM sqlite_master WHERE type='table' AND name!='sqlite_sequence'" " AND rootpage>0" ); if( rc!=SQLITE_OK ) goto end_of_vacuum; rc = execExecSql(db, "SELECT 'CREATE INDEX vacuum_db.' || substr(sql,14)" " FROM sqlite_master WHERE sql LIKE 'CREATE INDEX %' "); if( rc!=SQLITE_OK ) goto end_of_vacuum; rc = execExecSql(db, "SELECT 'CREATE UNIQUE INDEX vacuum_db.' || substr(sql,21) " " FROM sqlite_master WHERE sql LIKE 'CREATE UNIQUE INDEX %'"); if( rc!=SQLITE_OK ) goto end_of_vacuum; /* Loop through the tables in the main database. For each, do ** an "INSERT INTO vacuum_db.xxx SELECT * FROM xxx;" to copy ** the contents to the temporary database. */ |