--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/persistentstorage/sqlite3api/TEST/SRC/test_schema.c Fri Jan 22 11:06:30 2010 +0200
@@ -0,0 +1,361 @@
+/*
+** 2006 June 10
+**
+** 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.
+**
+*************************************************************************
+** Code for testing the virtual table interfaces. This code
+** is not included in the SQLite library. It is used for automated
+** testing of the SQLite library.
+**
+** $Id: test_schema.c,v 1.15 2008/07/07 14:50:14 drh Exp $
+*/
+
+/* The code in this file defines a sqlite3 virtual-table module that
+** provides a read-only view of the current database schema. There is one
+** row in the schema table for each column in the database schema.
+*/
+#define SCHEMA \
+"CREATE TABLE x(" \
+ "database," /* Name of database (i.e. main, temp etc.) */ \
+ "tablename," /* Name of table */ \
+ "cid," /* Column number (from left-to-right, 0 upward) */ \
+ "name," /* Column name */ \
+ "type," /* Specified type (i.e. VARCHAR(32)) */ \
+ "not_null," /* Boolean. True if NOT NULL was specified */ \
+ "dflt_value," /* Default value for this column */ \
+ "pk" /* True if this column is part of the primary key */ \
+")"
+
+/* If SQLITE_TEST is defined this code is preprocessed for use as part
+** of the sqlite test binary "testfixture". Otherwise it is preprocessed
+** to be compiled into an sqlite dynamic extension.
+*/
+#ifdef SQLITE_TEST
+ #include "sqliteInt.h"
+ #include "tcl.h"
+#else
+ #include "sqlite3ext.h"
+ SQLITE_EXTENSION_INIT1
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+
+typedef struct schema_vtab schema_vtab;
+typedef struct schema_cursor schema_cursor;
+
+/* A schema table object */
+struct schema_vtab {
+ sqlite3_vtab base;
+ sqlite3 *db;
+};
+
+/* A schema table cursor object */
+struct schema_cursor {
+ sqlite3_vtab_cursor base;
+ sqlite3_stmt *pDbList;
+ sqlite3_stmt *pTableList;
+ sqlite3_stmt *pColumnList;
+ int rowid;
+};
+
+/*
+** None of this works unless we have virtual tables.
+*/
+#ifndef SQLITE_OMIT_VIRTUALTABLE
+
+/*
+** Table destructor for the schema module.
+*/
+static int schemaDestroy(sqlite3_vtab *pVtab){
+ sqlite3_free(pVtab);
+ return 0;
+}
+
+/*
+** Table constructor for the schema module.
+*/
+static int schemaCreate(
+ sqlite3 *db,
+ void *pAux,
+ int argc, const char *const*argv,
+ sqlite3_vtab **ppVtab,
+ char **pzErr
+){
+ int rc = SQLITE_NOMEM;
+ schema_vtab *pVtab = sqlite3_malloc(sizeof(schema_vtab));
+ if( pVtab ){
+ memset(pVtab, 0, sizeof(schema_vtab));
+ pVtab->db = db;
+#ifndef SQLITE_OMIT_VIRTUALTABLE
+ rc = sqlite3_declare_vtab(db, SCHEMA);
+#endif
+ }
+ *ppVtab = (sqlite3_vtab *)pVtab;
+ return rc;
+}
+
+/*
+** Open a new cursor on the schema table.
+*/
+static int schemaOpen(sqlite3_vtab *pVTab, sqlite3_vtab_cursor **ppCursor){
+ int rc = SQLITE_NOMEM;
+ schema_cursor *pCur;
+ pCur = sqlite3_malloc(sizeof(schema_cursor));
+ if( pCur ){
+ memset(pCur, 0, sizeof(schema_cursor));
+ *ppCursor = (sqlite3_vtab_cursor *)pCur;
+ rc = SQLITE_OK;
+ }
+ return rc;
+}
+
+/*
+** Close a schema table cursor.
+*/
+static int schemaClose(sqlite3_vtab_cursor *cur){
+ schema_cursor *pCur = (schema_cursor *)cur;
+ sqlite3_finalize(pCur->pDbList);
+ sqlite3_finalize(pCur->pTableList);
+ sqlite3_finalize(pCur->pColumnList);
+ sqlite3_free(pCur);
+ return SQLITE_OK;
+}
+
+/*
+** Retrieve a column of data.
+*/
+static int schemaColumn(sqlite3_vtab_cursor *cur, sqlite3_context *ctx, int i){
+ schema_cursor *pCur = (schema_cursor *)cur;
+ switch( i ){
+ case 0:
+ sqlite3_result_value(ctx, sqlite3_column_value(pCur->pDbList, 1));
+ break;
+ case 1:
+ sqlite3_result_value(ctx, sqlite3_column_value(pCur->pTableList, 0));
+ break;
+ default:
+ sqlite3_result_value(ctx, sqlite3_column_value(pCur->pColumnList, i-2));
+ break;
+ }
+ return SQLITE_OK;
+}
+
+/*
+** Retrieve the current rowid.
+*/
+static int schemaRowid(sqlite3_vtab_cursor *cur, sqlite_int64 *pRowid){
+ schema_cursor *pCur = (schema_cursor *)cur;
+ *pRowid = pCur->rowid;
+ return SQLITE_OK;
+}
+
+static int finalize(sqlite3_stmt **ppStmt){
+ int rc = sqlite3_finalize(*ppStmt);
+ *ppStmt = 0;
+ return rc;
+}
+
+static int schemaEof(sqlite3_vtab_cursor *cur){
+ schema_cursor *pCur = (schema_cursor *)cur;
+ return (pCur->pDbList ? 0 : 1);
+}
+
+/*
+** Advance the cursor to the next row.
+*/
+static int schemaNext(sqlite3_vtab_cursor *cur){
+ int rc = SQLITE_OK;
+ schema_cursor *pCur = (schema_cursor *)cur;
+ schema_vtab *pVtab = (schema_vtab *)(cur->pVtab);
+ char *zSql = 0;
+
+ while( !pCur->pColumnList || SQLITE_ROW!=sqlite3_step(pCur->pColumnList) ){
+ if( SQLITE_OK!=(rc = finalize(&pCur->pColumnList)) ) goto next_exit;
+
+ while( !pCur->pTableList || SQLITE_ROW!=sqlite3_step(pCur->pTableList) ){
+ if( SQLITE_OK!=(rc = finalize(&pCur->pTableList)) ) goto next_exit;
+
+ assert(pCur->pDbList);
+ while( SQLITE_ROW!=sqlite3_step(pCur->pDbList) ){
+ rc = finalize(&pCur->pDbList);
+ goto next_exit;
+ }
+
+ /* Set zSql to the SQL to pull the list of tables from the
+ ** sqlite_master (or sqlite_temp_master) table of the database
+ ** identfied by the row pointed to by the SQL statement pCur->pDbList
+ ** (iterating through a "PRAGMA database_list;" statement).
+ */
+ if( sqlite3_column_int(pCur->pDbList, 0)==1 ){
+ zSql = sqlite3_mprintf(
+ "SELECT name FROM sqlite_temp_master WHERE type='table'"
+ );
+ }else{
+ sqlite3_stmt *pDbList = pCur->pDbList;
+ zSql = sqlite3_mprintf(
+ "SELECT name FROM %Q.sqlite_master WHERE type='table'",
+ sqlite3_column_text(pDbList, 1)
+ );
+ }
+ if( !zSql ){
+ rc = SQLITE_NOMEM;
+ goto next_exit;
+ }
+
+ rc = sqlite3_prepare(pVtab->db, zSql, -1, &pCur->pTableList, 0);
+ sqlite3_free(zSql);
+ if( rc!=SQLITE_OK ) goto next_exit;
+ }
+
+ /* Set zSql to the SQL to the table_info pragma for the table currently
+ ** identified by the rows pointed to by statements pCur->pDbList and
+ ** pCur->pTableList.
+ */
+ zSql = sqlite3_mprintf("PRAGMA %Q.table_info(%Q)",
+ sqlite3_column_text(pCur->pDbList, 1),
+ sqlite3_column_text(pCur->pTableList, 0)
+ );
+
+ if( !zSql ){
+ rc = SQLITE_NOMEM;
+ goto next_exit;
+ }
+ rc = sqlite3_prepare(pVtab->db, zSql, -1, &pCur->pColumnList, 0);
+ sqlite3_free(zSql);
+ if( rc!=SQLITE_OK ) goto next_exit;
+ }
+ pCur->rowid++;
+
+next_exit:
+ /* TODO: Handle rc */
+ return rc;
+}
+
+/*
+** Reset a schema table cursor.
+*/
+static int schemaFilter(
+ sqlite3_vtab_cursor *pVtabCursor,
+ int idxNum, const char *idxStr,
+ int argc, sqlite3_value **argv
+){
+ int rc;
+ schema_vtab *pVtab = (schema_vtab *)(pVtabCursor->pVtab);
+ schema_cursor *pCur = (schema_cursor *)pVtabCursor;
+ pCur->rowid = 0;
+ finalize(&pCur->pTableList);
+ finalize(&pCur->pColumnList);
+ finalize(&pCur->pDbList);
+ rc = sqlite3_prepare(pVtab->db,"PRAGMA database_list", -1, &pCur->pDbList, 0);
+ return (rc==SQLITE_OK ? schemaNext(pVtabCursor) : rc);
+}
+
+/*
+** Analyse the WHERE condition.
+*/
+static int schemaBestIndex(sqlite3_vtab *tab, sqlite3_index_info *pIdxInfo){
+ return SQLITE_OK;
+}
+
+/*
+** A virtual table module that merely echos method calls into TCL
+** variables.
+*/
+static sqlite3_module schemaModule = {
+ 0, /* iVersion */
+ schemaCreate,
+ schemaCreate,
+ schemaBestIndex,
+ schemaDestroy,
+ schemaDestroy,
+ schemaOpen, /* xOpen - open a cursor */
+ schemaClose, /* xClose - close a cursor */
+ schemaFilter, /* xFilter - configure scan constraints */
+ schemaNext, /* xNext - advance a cursor */
+ schemaEof, /* xEof */
+ schemaColumn, /* xColumn - read data */
+ schemaRowid, /* xRowid - read data */
+ 0, /* xUpdate */
+ 0, /* xBegin */
+ 0, /* xSync */
+ 0, /* xCommit */
+ 0, /* xRollback */
+ 0, /* xFindMethod */
+ 0, /* xRename */
+};
+
+#endif /* !defined(SQLITE_OMIT_VIRTUALTABLE) */
+
+#ifdef SQLITE_TEST
+
+/*
+** Decode a pointer to an sqlite3 object.
+*/
+extern int getDbPointer(Tcl_Interp *interp, const char *zA, sqlite3 **ppDb);
+
+/*
+** Register the schema virtual table module.
+*/
+static int register_schema_module(
+ ClientData clientData, /* Not used */
+ Tcl_Interp *interp, /* The TCL interpreter that invoked this command */
+ int objc, /* Number of arguments */
+ Tcl_Obj *CONST objv[] /* Command arguments */
+){
+ sqlite3 *db;
+ if( objc!=2 ){
+ Tcl_WrongNumArgs(interp, 1, objv, "DB");
+ return TCL_ERROR;
+ }
+ if( getDbPointer(interp, Tcl_GetString(objv[1]), &db) ) return TCL_ERROR;
+#ifndef SQLITE_OMIT_VIRTUALTABLE
+ sqlite3_create_module(db, "schema", &schemaModule, 0);
+#endif
+ return TCL_OK;
+}
+
+/*
+** Register commands with the TCL interpreter.
+*/
+int Sqlitetestschema_Init(Tcl_Interp *interp){
+ static struct {
+ char *zName;
+ Tcl_ObjCmdProc *xProc;
+ void *clientData;
+ } aObjCmd[] = {
+ { "register_schema_module", register_schema_module, 0 },
+ };
+ int i;
+ for(i=0; i<sizeof(aObjCmd)/sizeof(aObjCmd[0]); i++){
+ Tcl_CreateObjCommand(interp, aObjCmd[i].zName,
+ aObjCmd[i].xProc, aObjCmd[i].clientData, 0);
+ }
+ return TCL_OK;
+}
+
+#else
+
+/*
+** Extension load function.
+*/
+int sqlite3_extension_init(
+ sqlite3 *db,
+ char **pzErrMsg,
+ const sqlite3_api_routines *pApi
+){
+ SQLITE_EXTENSION_INIT2(pApi);
+#ifndef SQLITE_OMIT_VIRTUALTABLE
+ sqlite3_create_module(db, "schema", &schemaModule, 0);
+#endif
+ return 0;
+}
+
+#endif