static gchar *
__initialize_statement_delete_query_string (MidgardDBObjectClass *klass, gboolean add_workspace)
{
const gchar *table = MGD_DBCLASS_TABLENAME (klass);
MidgardMetadataClass *metadata = MGD_DBCLASS_METADATA_CLASS (klass);
g_return_val_if_fail (table != NULL, NULL);
GString *sql = g_string_new ("");
g_string_append_printf (sql, "UPDATE %s SET ", table);
if (metadata) {
g_string_append (sql,
"metadata_revisor=##metadata_revisor::string, "
"metadata_revised=##metadata_revised::string, "
"metadata_revision=##metadata_revision::guint, "
"metadata_deleted=##metadata_deleted::guint ");
} else {
g_string_append_printf (sql,
"%s=%s::guint ",
midgard_core_object_get_deleted_field (klass),
midgard_core_object_get_deleted_field (klass));
}
if (add_workspace)
g_string_append_printf (sql, " WHERE guid=##guid::string AND %s=##%s::guint",
MGD_WORKSPACE_ID_FIELD, MGD_WORKSPACE_ID_FIELD);
else
g_string_append (sql, " WHERE guid=##guid::string ");
return g_string_free (sql, FALSE);
}
static void
__statement_update_add_metadata_fields (MidgardDBObjectClass *klass, GString *sql)
{
MidgardMetadataClass *mklass = MGD_DBCLASS_METADATA_CLASS (klass);
if (!mklass)
return;
guint i;
guint n_prop;
GParamSpec **pspecs = g_object_class_list_properties (G_OBJECT_CLASS (mklass), &n_prop);
if (!pspecs)
return;
for (i = 0; i < n_prop; i++) {
const gchar *col_name = midgard_core_class_get_property_colname (MIDGARD_DBOBJECT_CLASS (mklass), pspecs[i]->name);
if (!col_name)
continue;
const gchar *type_name = g_type_name (pspecs[i]->value_type);
if (pspecs[i]->value_type == MIDGARD_TYPE_TIMESTAMP)
type_name = "string";
g_string_append_printf (sql, ", %s=##%s::%s", col_name, col_name, type_name);
}
g_free (pspecs);
}
static void __get_property_attribute (xmlNode *node, gchar **property_string,
gchar **target_name, MgdSchemaPropertyAttr **prop_attr, MidgardDBObjectClass *klass)
{
*target_name = property_string[1];
if (property_string[2] != NULL && !g_str_equal (*target_name, "metadata")) {
__view_error (node, "%s not allowed in view configuration", target_name);
return;
}
/* Check metadata */
if (property_string[2] != NULL && g_str_equal (*target_name, "metadata")) {
if (!MGD_DBCLASS_METADATA_CLASS (klass)) {
__view_error (node, "No metadata registered for %s class", G_OBJECT_CLASS_NAME (klass));
return;
}
*target_name = property_string[2];
*prop_attr = g_hash_table_lookup (MIDGARD_DBOBJECT_CLASS (MGD_DBCLASS_METADATA_CLASS (klass))->dbpriv->storage_data->prophash, *target_name);
if (!*prop_attr)
__view_error (node, "%s not found. Not registered for %s.metadata ?", *target_name, property_string[0]);
}
/* Fallback to custom properties, metadata class doesn't exist in MgdSchema scope */
if (!*prop_attr) {
*prop_attr = g_hash_table_lookup (klass->dbpriv->storage_data->prophash, *target_name);
if (!*prop_attr)
__view_error(node, "%s not found. Not registered for %s ?", *target_name, property_string[0]);
if ((*prop_attr)->is_private)
__view_error (node, "Private property %s.%s can not be added to view.",
G_OBJECT_CLASS_NAME (G_OBJECT_CLASS (klass)), (*prop_attr)->name);
}
}
GList *
midgard_core_qb_set_object_from_query (MidgardQueryBuilder *builder, guint select_type, MidgardObject **nobject)
{
g_assert(builder != NULL);
guint ret_rows, ret_fields;
MidgardConnection *mgd = builder->priv->mgd;
gchar *sql = midgard_core_qb_get_sql(
builder, select_type,
midgard_query_builder_get_object_select(builder, select_type));
GSList *olist = NULL;
MidgardDBObjectClass *dbklass = MIDGARD_DBOBJECT_CLASS(g_type_class_peek(builder->priv->type));
if (!dbklass) {
MIDGARD_ERRNO_SET_STRING (mgd, MGD_ERR_INTERNAL, "Failed to peek MidgardDBObjectClass pointer");
return NULL;
}
if (dbklass->dbpriv->set_from_sql) {
if (select_type != MQB_SELECT_GUID) {
olist = dbklass->dbpriv->set_from_sql(mgd, builder->priv->type, ((const gchar *)sql));
g_free(sql);
return (GList *)olist;
}
}
GdaDataModel *model = midgard_core_query_get_model(builder->priv->mgd, sql);
g_free(sql);
if(!model)
return NULL;
MidgardObject *object = NULL;
gint rows, columns;
const GValue *gvalue = NULL;
ret_rows = gda_data_model_get_n_rows(model);
ret_fields = gda_data_model_get_n_columns(model);
/* records found , allocate as many objects as many returned rows */
GList *list = NULL;
if(ret_rows == 0) {
g_object_unref(model);
return list;
}
/* We count rows only */
if(select_type == MQB_SELECT_GUID) {
gvalue = midgard_data_model_get_value_at(model, 0, 0);
if (!gvalue || !G_IS_VALUE (gvalue)) {
g_object_unref (model);
return 0;
}
MidgardTypeHolder *holder = g_new(MidgardTypeHolder, 1);
GValue val = {0, };
g_value_init (&val, G_TYPE_INT64);
g_value_transform (gvalue, &val);
holder->elements = (guint)g_value_get_int64((GValue*)&val);
list = g_list_append(list, holder);
g_object_unref(model);
g_value_unset (&val);
return list;
}
/* Get every row */
for (rows = 0; rows < ret_rows; rows++) {
if(!nobject)
object = g_object_new (builder->priv->type, "connection", mgd, NULL);
else
object = *nobject;
MGD_OBJECT_IN_STORAGE (object) = TRUE;
if(dbklass->dbpriv->__set_from_sql != NULL) {
dbklass->dbpriv->__set_from_sql(MIDGARD_DBOBJECT(object),
model, rows);
} else {
/* Compute number of metadata properties */
guint n_md_props = 0;
MidgardMetadata *mklass = (MidgardMetadata *)MGD_DBCLASS_METADATA_CLASS (dbklass);
if (mklass)
n_md_props = g_hash_table_size (MGD_DBCLASS_STORAGE_DATA (mklass)->prophash);
guint __cols = n_md_props + 1; /* Add one for guid */
/* we have guid and metadata columns first */
for (columns = __cols; columns < ret_fields; columns++) {
gvalue = midgard_data_model_get_value_at(model, columns, rows);
const gchar *coltitle =
gda_data_model_get_column_title(model, columns);
GParamSpec *pspec =
g_object_class_find_property(G_OBJECT_GET_CLASS(object), coltitle);
if(G_IS_VALUE(gvalue)) {
if (!pspec) {
g_warning("Failed to found (unregistered) %s property (%s class)",
coltitle, G_OBJECT_TYPE_NAME(object));
continue;
}
if (G_VALUE_TYPE (gvalue) == GDA_TYPE_BINARY
&& G_TYPE_FUNDAMENTAL (pspec->value_type) == G_TYPE_STRING) {
gchar *stringified = midgard_core_query_binary_stringify ((GValue *)gvalue);
g_object_set (G_OBJECT (object), coltitle, stringified, NULL);
g_free (stringified);
} else if (pspec->value_type != G_VALUE_TYPE (gvalue)) {
GValue _convert = {0, };
g_value_init (&_convert, pspec->value_type);
if (g_value_transform (gvalue, &_convert)) {
/* FIXME, remove workaround once it's fixed in GDA */
/* https://bugzilla.gnome.org/show_bug.cgi?id=617550 */
guint dbtype = mgd->priv->config->priv->dbtype;
if (dbtype == MIDGARD_DB_TYPE_MYSQL && G_VALUE_TYPE (gvalue) == GDA_TYPE_BLOB) {
gchar *tmp_str = __default_unescape_string (g_value_get_string (&_convert));
if (tmp_str)
g_value_take_string (&_convert, tmp_str);
}
g_object_set_property (G_OBJECT (object), coltitle, &_convert);
} else {
g_warning ("Failed to convert %s to %s for %s property",
G_VALUE_TYPE_NAME (gvalue),
G_VALUE_TYPE_NAME (&_convert),
coltitle);
}
g_value_unset (&_convert);
} else {
g_object_set_property(G_OBJECT(object), coltitle, gvalue);
}
} else if (gda_value_is_null(gvalue)) {
switch (pspec->value_type) {
case G_TYPE_INT:
case G_TYPE_UINT:
g_object_set(G_OBJECT(object), coltitle, 0, NULL);
break;
case G_TYPE_STRING:
g_object_set(G_OBJECT(object), coltitle, "", NULL);
break;
default:
g_warning("Found (%s) not a value at %d.%d (%s)",
g_type_name(pspec->value_type),
columns, rows,
gda_data_model_get_column_title(model, columns));
break;
}
}
}
}
/* Set guid */
const gchar *guid;
gvalue = midgard_data_model_get_value_at(model, 0, rows);
if(G_IS_VALUE(gvalue) && G_VALUE_HOLDS_STRING(gvalue)){
guid = g_value_get_string(gvalue);
g_free((gchar *)MIDGARD_DBOBJECT(object)->dbpriv->guid);
MIDGARD_DBOBJECT(object)->dbpriv->guid = g_strdup(guid);
}
/* Set metadata */
MidgardMetadata *metadata = MGD_DBOBJECT_METADATA (object);
if (metadata) {
GParamSpec *pspec = g_object_class_find_property(G_OBJECT_GET_CLASS(object), "metadata");
if (pspec)
__mqb_set_metadata(metadata, model, rows);
}
list = g_list_append(list, G_OBJECT(object));
}
g_object_unref(model);
return list;
}
static void
_midgard_query_select_execute (MidgardExecutable *iface, gboolean async, GError **error)
{
g_return_if_fail (iface != NULL);
MidgardQuerySelect *self = MIDGARD_QUERY_SELECT (iface);
MidgardQueryExecutor *executor = MIDGARD_QUERY_EXECUTOR (self);
GError *err = NULL;
midgard_validable_validate (MIDGARD_VALIDABLE (self), &err);
if (err) {
g_propagate_error (error, err);
return;
}
MidgardDBObjectClass *klass = executor->priv->storage->priv->klass;
MidgardConnection *mgd = executor->priv->mgd;
GdaConnection *cnc = mgd->priv->connection;
GdaSqlStatement *sql_stm;
GdaSqlStatementSelect *sss;
sql_stm = gda_sql_statement_new (GDA_SQL_STATEMENT_SELECT);
sss = (GdaSqlStatementSelect*) sql_stm->contents;
g_assert (GDA_SQL_ANY_PART (sss)->type == GDA_SQL_ANY_STMT_SELECT);
MIDGARD_QUERY_EXECUTOR (self)->priv->stmt = sql_stm;
sss->from = gda_sql_select_from_new (GDA_SQL_ANY_PART (sss));
/* Initialize top base expresion and operation with default AND operator type */
GdaSqlExpr *base_where = gda_sql_expr_new (GDA_SQL_ANY_PART (sss));
GdaSqlOperation *base_operation = gda_sql_operation_new (GDA_SQL_ANY_PART (base_where));
base_operation->operator_type = GDA_SQL_OPERATOR_TYPE_AND;
base_where->cond = base_operation;
gda_sql_statement_select_take_where_cond (sql_stm, base_where);
/* Create targets (FROM) */
GdaSqlSelectTarget *s_target = gda_sql_select_target_new (GDA_SQL_ANY_PART (sss->from));
s_target->table_name = g_strdup (midgard_core_class_get_table (klass));
s_target->as = g_strdup_printf ("t%d", ++MIDGARD_QUERY_EXECUTOR (self)->priv->tableid);
MIDGARD_QUERY_EXECUTOR (self)->priv->table_alias = g_strdup (s_target->as);
gda_sql_select_from_take_new_target (sss->from, s_target);
/* Set target expression */
GdaSqlExpr *texpr = gda_sql_expr_new (GDA_SQL_ANY_PART (s_target));
GValue *tval = g_new0 (GValue, 1);
g_value_init (tval, G_TYPE_STRING);
g_value_set_string (tval, s_target->table_name);
texpr->value = tval;
s_target->expr = texpr;
/* Add fields for all properties registered per class (SELECT a,b,c...) */
klass->dbpriv->add_fields_to_select_statement (klass, mgd, sss, s_target->as);
GdaSqlExpr *where = sss->where_cond;
GdaSqlOperation *operation = where->cond;
/* Add joins, LEFT JOIN tbl2 ON... */
__query_select_add_joins (MIDGARD_QUERY_SELECT (self), operation, &err);
if (err) {
g_propagate_error (error, err);
goto return_false;
}
/* Add constraints' conditions (WHERE a=1, b=2...) */
if (MIDGARD_QUERY_EXECUTOR (self)->priv->constraint) {
MIDGARD_QUERY_CONSTRAINT_SIMPLE_GET_INTERFACE (MIDGARD_QUERY_EXECUTOR (self)->priv->constraint)->priv->add_conditions_to_statement (MIDGARD_QUERY_EXECUTOR (self), MIDGARD_QUERY_EXECUTOR (self)->priv->constraint, sql_stm, base_where, &err);
if (err) {
g_propagate_error (error, err);
goto return_false;
}
if (MIDGARD_QUERY_EXECUTOR (self)->priv->n_constraints == 1)
__add_second_dummy_constraint (sss, operation);
/* Add dummy constraint if operation has only one operand */
if (operation->operands && (g_slist_length (operation->operands) == 1))
__add_dummy_constraint (sss, operation);
} else {
/* no constraints, add dummy '1=1 AND 0<1' to satisfy top constraint group */
__add_dummy_constraint (sss, operation);
__add_second_dummy_constraint (sss, operation);
}
/* Add orders , ORDER BY t1.field... */
if (!__query_select_add_orders (executor, &err)) {
if (err)
g_propagate_error (error, err);
goto return_false;
}
/* Exclude deleted */
if (MGD_DBCLASS_METADATA_CLASS (klass) && !executor->priv->include_deleted)
__add_exclude_deleted_constraints (executor, sss, operation, klass);
/* Add limit, LIMIT x */
if (executor->priv->limit > 0) {
GdaSqlExpr *limit_expr = gda_sql_expr_new (GDA_SQL_ANY_PART (sss));
GValue *limit_val = g_new0 (GValue, 1);
g_value_init (limit_val, G_TYPE_STRING);
g_value_take_string (limit_val, g_strdup_printf ("%d", executor->priv->limit));
limit_expr->value = limit_val;
sss->limit_count = limit_expr;
}
/* Add offset, OFFSET x */
if (executor->priv->offset >= 0) {
GdaSqlExpr *offset_expr = gda_sql_expr_new (GDA_SQL_ANY_PART (sss));
GValue *offset_val = g_new0 (GValue, 1);
g_value_init (offset_val, G_TYPE_STRING);
g_value_take_string (offset_val, g_strdup_printf ("%d", executor->priv->offset));
offset_expr->value = offset_val;
sss->limit_offset = offset_expr;
}
/* Check structure */
if (!gda_sql_statement_check_structure (sql_stm, &err)) {
g_set_error (error, MIDGARD_EXECUTION_ERROR, MIDGARD_EXECUTION_ERROR_INTERNAL,
"Can't build SELECT statement: %s)", err && err->message ? err->message : _("Unknown reason"));
if (err)
g_clear_error (&err);
goto return_false;
}
/* Create statement */
GdaStatement *stmt = gda_statement_new ();
g_object_set (G_OBJECT (stmt), "structure", sql_stm, NULL);
gda_sql_statement_free (sql_stm);
sql_stm = NULL;
if (MGD_CNC_DEBUG (mgd)) {
gchar *debug_sql = gda_connection_statement_to_sql (cnc, stmt, NULL, GDA_STATEMENT_SQL_PRETTY, NULL, NULL);
g_debug ("QuerySelect: %s", debug_sql);
g_free (debug_sql);
}
/* execute statement */
GdaDataModel *model = NULL;
midgard_executable_execution_start (MIDGARD_EXECUTABLE(self));
model = gda_connection_statement_execute_select (cnc, stmt, NULL, &err);
g_object_unref (stmt);
if (!model && !err) {
g_set_error (error, MIDGARD_EXECUTION_ERROR, MIDGARD_EXECUTION_ERROR_INTERNAL,
"Execute error - Unknown reason, underlying error is NULL");
goto return_false;
}
if (err) {
g_set_error (error, MIDGARD_EXECUTION_ERROR, MIDGARD_EXECUTION_ERROR_INTERNAL,
"Execute error - %s", err->message);
g_error_free (err);
goto return_false;
}
executor->priv->results_count = gda_data_model_get_n_rows (model);
if (executor->priv->resultset && G_IS_OBJECT (executor->priv->resultset))
g_object_unref (G_OBJECT (executor->priv->resultset));
executor->priv->resultset = (gpointer) model;
return;
return_false:
if (sql_stm)
gda_sql_statement_free (sql_stm);
return;
}
/* Create GdaSqlSelectField for every property registered for the class. */
void
_add_fields_to_select_statement (MidgardDBObjectClass *klass, MidgardConnection *mgd, GdaSqlStatementSelect *select, const gchar *table_name)
{
guint n_prop;
guint i;
GdaSqlSelectField *select_field;
GdaSqlExpr *expr;
GValue *val;
gchar *table_field;
GdaConnection *cnc = mgd->priv->connection;
GParamSpec **pspecs = g_object_class_list_properties (G_OBJECT_CLASS (klass), &n_prop);
if (!pspecs)
return;
const gchar *property_table = NULL;
for (i = 0; i < n_prop; i++) {
const gchar *property = pspecs[i]->name;
const gchar *property_field = midgard_core_class_get_property_colname (klass, property);
property_table = midgard_core_class_get_property_table (klass, property);
if (property_table && table_name)
property_table = table_name;
/* Ignore properties with NULL storage and those of object type */
if (!property_table || pspecs[i]->value_type == G_TYPE_OBJECT)
continue;
select_field = gda_sql_select_field_new (GDA_SQL_ANY_PART (select));
/*select_field->field_name = g_strdup (property_field);
select_field->table_name = g_strdup (property_table);*/
select_field->as = gda_connection_quote_sql_identifier (cnc, property);
select->expr_list = g_slist_append (select->expr_list, select_field);
expr = gda_sql_expr_new (GDA_SQL_ANY_PART (select_field));
val = g_new0 (GValue, 1);
g_value_init (val, G_TYPE_STRING);
gchar *q_table = gda_connection_quote_sql_identifier (cnc, property_table);
gchar *q_field = gda_connection_quote_sql_identifier (cnc, property_field);
table_field = g_strconcat (q_table, ".", q_field, NULL);
g_value_set_string (val, table_field);
g_free (q_table);
g_free (q_field);
g_free (table_field);
expr->value = val;
select_field->expr = expr;
}
g_free (pspecs);
if (!klass->dbpriv->has_metadata)
return;
/* Check if metadata provides own method to add fields. If not, use given class storage. */
if (MIDGARD_IS_OBJECT_CLASS (klass)) {
MidgardMetadataClass *mklass = MGD_DBCLASS_METADATA_CLASS (klass);
if (!mklass)
return;
if (MIDGARD_DBOBJECT_CLASS (mklass)->dbpriv->add_fields_to_select_statement) {
MIDGARD_DBOBJECT_CLASS (mklass)->dbpriv->add_fields_to_select_statement (MIDGARD_DBOBJECT_CLASS (mklass), mgd, select, table_name);
return;
}
const gchar *table = midgard_core_class_get_table (klass);
if (table_name)
table = table_name;
/* TODO, Once we stabilize use case, refactor this below to minimize code usage */
GParamSpec **pspecs = g_object_class_list_properties (G_OBJECT_CLASS (mklass), &n_prop);
if (!pspecs)
return;
for (i = 0; i < n_prop; i++) {
const gchar *property = pspecs[i]->name;
const gchar *property_field = midgard_core_class_get_property_colname (MIDGARD_DBOBJECT_CLASS (mklass), property);
if (pspecs[i]->value_type == G_TYPE_OBJECT || !property_field)
continue;
select_field = gda_sql_select_field_new (GDA_SQL_ANY_PART (select));
/*select_field->field_name = g_strdup (property_field);
select_field->table_name = g_strdup (table);*/
select_field->as = g_strconcat ("metadata_", property, NULL);
select->expr_list = g_slist_append (select->expr_list, select_field);
expr = gda_sql_expr_new (GDA_SQL_ANY_PART (select_field));
val = g_new0 (GValue, 1);
g_value_init (val, G_TYPE_STRING);
table_field = g_strconcat (table, ".", property_field, NULL);
g_value_set_string (val, table_field);
g_free (table_field);
expr->value = val;
select_field->expr = expr;
}
g_free (pspecs);
}
return;
}
