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/*****************************************************************************
*
* MODULE: SQL statement parser library
*
* AUTHOR(S): lex.l and yac.y were originally taken from unixODBC and
* probably written by Peter Harvey <pharvey@codebydesigns.com>,
* modifications and other code by Radim Blazek
*
* PURPOSE: Parse input string containing SQL statement to
* SQLPSTMT structure.
* SQL parser may be used by simple database drivers.
*
* COPYRIGHT: (C) 2000 by the GRASS Development Team
*
* This program is free software under the GNU General Public
* License (>=v2). Read the file COPYING that comes with
* GRASS for details.
*
*****************************************************************************/
#include <grass/sqlp.h>
#include <stdio.h>
static void print_node(SQLPNODE *nptr, int level)
{
int i;
for (i = 0; i < level; i++) {
fprintf(stderr, " ");
}
if (nptr->node_type == SQLP_NODE_EXPRESSION) {
fprintf(stderr, "op: %s\n", sqpOperatorName(nptr->oper));
if (nptr->left) {
print_node(nptr->left, level + 1);
}
if (nptr->right) {
print_node(nptr->right, level + 1);
}
}
else if (nptr->node_type == SQLP_NODE_VALUE) {
switch (nptr->value.type) {
case SQLP_NULL:
fprintf(stderr, "val: NULL\n");
break;
case SQLP_D:
fprintf(stderr, "val: %e\n", nptr->value.d);
break;
case SQLP_I:
fprintf(stderr, "val: %d\n", nptr->value.i);
break;
case SQLP_S:
fprintf(stderr, "val: '%s'\n", nptr->value.s);
break;
}
}
else { /* SQLP_NODE_COLUMN */
fprintf(stderr, "col: %s\n", nptr->column_name);
}
}
int sqpPrintStmt(SQLPSTMT *st)
{
int i;
fprintf(stderr, "********** SQL PARSER RESULT **********\n");
fprintf(stderr, "INPUT: %s\n", sqlpStmt->stmt);
fprintf(stderr, "COMMAND: ");
switch (sqlpStmt->command) {
case (SQLP_ADD_COLUMN):
fprintf(stderr, "ADD COLUMN\n");
break;
case (SQLP_CREATE):
fprintf(stderr, "CREATE\n");
break;
case (SQLP_DROP):
fprintf(stderr, "DROP\n");
break;
case (SQLP_DROP_COLUMN):
fprintf(stderr, "DROP COLUMN\n");
break;
case (SQLP_INSERT):
fprintf(stderr, "INSERT\n");
break;
case (SQLP_UPDATE):
fprintf(stderr, "UPDATE\n");
break;
case (SQLP_SELECT):
fprintf(stderr, "SELECT\n");
break;
case (SQLP_DELETE):
fprintf(stderr, "DELETE\n");
break;
default:
fprintf(stderr, "UNKNOWN\n");
}
fprintf(stderr, "TABLE: %s\n", sqlpStmt->table);
/* columns */
for (i = 0; i < st->nCol; i++) {
if (sqlpStmt->command == SQLP_CREATE) {
fprintf(stderr, "COLUMN %2d: ", i + 1);
switch (sqlpStmt->ColType[i]) {
case (SQLP_VARCHAR):
fprintf(stderr, "type:varchar width:%d", sqlpStmt->ColWidth[i]);
break;
case (SQLP_INTEGER):
fprintf(stderr, "type:integer");
break;
case (SQLP_DOUBLE):
fprintf(stderr, "type:double");
break;
case (SQLP_DATE):
fprintf(stderr, "type:date");
break;
case (SQLP_TIME):
fprintf(stderr, "type:time");
break;
default:
fprintf(stderr, "type:unknown");
break;
}
fprintf(stderr, " name:%s\n", sqlpStmt->Col[i].s);
}
else {
fprintf(stderr, "COLUMN %2d: %s\n", i + 1, sqlpStmt->Col[i].s);
}
}
/* values */
for (i = 0; i < st->nVal; i++) {
fprintf(stderr, "VALUE %2d ", i + 1);
switch (sqlpStmt->Val[i].type) {
case (SQLP_S):
fprintf(stderr, "(string) : %s\n", sqlpStmt->Val[i].s);
break;
case (SQLP_I):
fprintf(stderr, "(integer): %d\n", sqlpStmt->Val[i].i);
break;
case (SQLP_D):
fprintf(stderr, "(float) : %f\n", sqlpStmt->Val[i].d);
break;
case (SQLP_NULL):
fprintf(stderr, "(unknown) : null\n");
break;
case (SQLP_EXPR):
fprintf(stderr, "(expression) :\n");
print_node(sqlpStmt->Val[i].expr, 0);
break;
default:
fprintf(stderr, "unknown\n");
break;
}
}
if (sqlpStmt->upperNodeptr) {
fprintf(stderr, "WHERE:\n");
print_node(sqlpStmt->upperNodeptr, 0);
}
if (sqlpStmt->command == SQLP_SELECT) {
if (sqlpStmt->orderDir) {
fprintf(stderr, "ORDER BY: %s %s\n", sqlpStmt->orderCol,
sqlpStmt->orderDir == 1 ? "ASC" : "DESC");
}
else {
fprintf(stderr, "ORDER BY: %s\n", sqlpStmt->orderCol);
}
}
fprintf(stderr, "***************************************\n");
return (1);
}
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