112   schema_cursor *pCur;  in schemaOpen()  local
113   pCur = sqlite3_malloc(sizeof(schema_cursor));  in schemaOpen()
114   if( pCur ){  in schemaOpen()
115     memset(pCur, 0, sizeof(schema_cursor));  in schemaOpen()
116     *ppCursor = (sqlite3_vtab_cursor *)pCur;  in schemaOpen()
126   schema_cursor *pCur = (schema_cursor *)cur;  in schemaClose()  local
127   sqlite3_finalize(pCur->pDbList);  in schemaClose()
128   sqlite3_finalize(pCur->pTableList);  in schemaClose()
129   sqlite3_finalize(pCur->pColumnList);  in schemaClose()
130   sqlite3_free(pCur);  in schemaClose()
138   schema_cursor *pCur = (schema_cursor *)cur;  in schemaColumn()  local
141       sqlite3_result_value(ctx, sqlite3_column_value(pCur->pDbList, 1));  in schemaColumn()
144       sqlite3_result_value(ctx, sqlite3_column_value(pCur->pTableList, 0));  in schemaColumn()
147       sqlite3_result_value(ctx, sqlite3_column_value(pCur->pColumnList, i-2));  in schemaColumn()
157   schema_cursor *pCur = (schema_cursor *)cur;  in schemaRowid()  local
158   *pRowid = pCur->rowid;  in schemaRowid()
169   schema_cursor *pCur = (schema_cursor *)cur;  in schemaEof()  local
170   return (pCur->pDbList ? 0 : 1);  in schemaEof()
178   schema_cursor *pCur = (schema_cursor *)cur;  in schemaNext()  local
182   while( !pCur->pColumnList || SQLITE_ROW!=sqlite3_step(pCur->pColumnList) ){  in schemaNext()
183     if( SQLITE_OK!=(rc = finalize(&pCur->pColumnList)) ) goto next_exit;  in schemaNext()
185     while( !pCur->pTableList || SQLITE_ROW!=sqlite3_step(pCur->pTableList) ){  in schemaNext()
186       if( SQLITE_OK!=(rc = finalize(&pCur->pTableList)) ) goto next_exit;  in schemaNext()
188       assert(pCur->pDbList);  in schemaNext()
189       while( SQLITE_ROW!=sqlite3_step(pCur->pDbList) ){  in schemaNext()
190         rc = finalize(&pCur->pDbList);  in schemaNext()
199       if( sqlite3_column_int(pCur->pDbList, 0)==1 ){  in schemaNext()
204         sqlite3_stmt *pDbList = pCur->pDbList;  in schemaNext()
215       rc = sqlite3_prepare(pVtab->db, zSql, -1, &pCur->pTableList, 0);  in schemaNext()
225         sqlite3_column_text(pCur->pDbList, 1),  in schemaNext()
226         sqlite3_column_text(pCur->pTableList, 0)  in schemaNext()
233     rc = sqlite3_prepare(pVtab->db, zSql, -1, &pCur->pColumnList, 0);  in schemaNext()
237   pCur->rowid++;  in schemaNext()
254   schema_cursor *pCur = (schema_cursor *)pVtabCursor;  in schemaFilter()  local
255   pCur->rowid = 0;  in schemaFilter()
256   finalize(&pCur->pTableList);  in schemaFilter()
257   finalize(&pCur->pColumnList);  in schemaFilter()
258   finalize(&pCur->pDbList);  in schemaFilter()
259   rc = sqlite3_prepare(pVtab->db,"PRAGMA database_list", -1, &pCur->pDbList, 0);  in schemaFilter()