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Add first cut of sqlite3_declare_vtab(). Not at all well tested yet. (CVS 3213)

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FossilOrigin-Name: bbeb93b5bb26ba83ee7b7ae439ca5ceebebac9a0
This commit is contained in:
danielk1977
2006-06-12 11:24:37 +00:00
parent 78efaba10e
commit 7e6ebfb246
9 changed files with 225 additions and 45 deletions
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44
src/test8.c
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@@ -13,7 +13,7 @@
** is not included in the SQLite library. It is used for automated
** testing of the SQLite library.
**
** $Id: test8.c,v 1.2 2006/06/12 06:09:19 danielk1977 Exp $
** $Id: test8.c,v 1.3 2006/06/12 11:24:37 danielk1977 Exp $
*/
#include "sqliteInt.h"
#include "tcl.h"
@@ -30,6 +30,44 @@ static void appendToEchoModule(const sqlite3_module *pModule, const char *zArg){
Tcl_SetVar((Tcl_Interp *)(pModule->pAux), "echo_module", zArg, flags);
}
/*
** This function is called from within the echo-modules xCreate and
** xConnect methods. The argc and argv arguments are copies of those
** passed to the calling method. This function is responsible for
** calling sqlite3_declare_vtab() to declare the schema of the virtual
** table being created or connected.
**
** If the constructor was passed just one argument, i.e.:
**
** CREATE TABLE t1 AS echo(t2);
**
** Then t2 is assumed to be the name of a *real* database table. The
** schema of the virtual table is declared by passing a copy of the
** CREATE TABLE statement for the real table to sqlite3_declare_vtab().
** Hence, the virtual table should have exactly the same column names and
** types as the real table.
*/
static int echoDeclareVtab(sqlite3 *db, int argc, char **argv){
int rc = SQLITE_OK;
if( argc==2 ){
sqlite3_stmt *pStmt = 0;
sqlite3_prepare(db,
"SELECT sql FROM sqlite_master WHERE type = 'table' AND name = ?",
-1, &pStmt, 0);
sqlite3_bind_text(pStmt, 1, argv[1], -1, 0);
if( sqlite3_step(pStmt)==SQLITE_ROW ){
const char *zCreateTable = sqlite3_column_text(pStmt, 0);
sqlite3_declare_vtab(db, zCreateTable);
} else {
rc = SQLITE_ERROR;
}
sqlite3_finalize(pStmt);
}
return rc;
}
/* Methods for the echo module */
static int echoCreate(
sqlite3 *db,
@@ -38,7 +76,6 @@ static int echoCreate(
sqlite3_vtab **ppVtab
){
int i;
Tcl_Interp *interp = pModule->pAux;
*ppVtab = pModule->pAux;
appendToEchoModule(pModule, "xCreate");
@@ -46,6 +83,7 @@ static int echoCreate(
appendToEchoModule(pModule, argv[i]);
}
echoDeclareVtab(db, argc, argv);
return 0;
}
static int echoConnect(
@@ -63,6 +101,8 @@ static int echoConnect(
Tcl_SetVar(interp, "echo_module", argv[i],
TCL_APPEND_VALUE | TCL_LIST_ELEMENT | TCL_GLOBAL_ONLY);
}
echoDeclareVtab(db, argc, argv);
return 0;
}
static int echoDisconnect(sqlite3_vtab *pVtab){