[tarantool-patches] [PATCH v5 3/5] sql: create method dump_lua for port_sql
imeevma at tarantool.org
imeevma at tarantool.org
Sat Dec 22 14:31:54 MSK 2018
This patch creates the dump_lua method for port_sql. It also
defines a new function box.sql.new_execute(), which will be
converted to box.sql.execute().
Part of #3505
---
src/box/execute.c | 84 ++++++++++++++++++++++++++++++++++++++++++++++++++++++-
src/box/lua/sql.c | 25 +++++++++++++++++
2 files changed, 108 insertions(+), 1 deletion(-)
diff --git a/src/box/execute.c b/src/box/execute.c
index b07de28..3cbee4f 100644
--- a/src/box/execute.c
+++ b/src/box/execute.c
@@ -43,6 +43,7 @@
#include "port.h"
#include "tuple.h"
#include "sql/vdbe.h"
+#include "lua/utils.h"
const char *sql_type_strs[] = {
NULL,
@@ -674,6 +675,87 @@ finish:
return rc;
}
+/**
+ * Push a metadata of the prepared statement to Lua stack.
+ *
+ * @param stmt Prepared statement.
+ * @param L Lua stack.
+ * @param column_count Statement's column count.
+ */
+static inline void
+lua_sql_get_description(struct sqlite3_stmt *stmt, struct lua_State *L,
+ int column_count)
+{
+ assert(column_count > 0);
+ lua_createtable(L, column_count, 0);
+ for (int i = 0; i < column_count; ++i) {
+ lua_createtable(L, 2, 0);
+ const char *name = sqlite3_column_name(stmt, i);
+ const char *type = sqlite3_column_datatype(stmt, i);
+ /*
+ * Can not fail, since all column names are
+ * preallocated during prepare phase and the
+ * column_name simply returns them.
+ */
+ assert(name != NULL);
+ lua_pushlstring(L, name, strlen(name));
+ lua_setfield(L, -2, "name");
+ lua_pushlstring(L, type, strlen(type));
+ lua_setfield(L, -2, "type");
+ lua_rawseti(L, -2, i + 1);
+ }
+ lua_setfield(L, -2, "metadata");
+}
+
+/**
+ * Dump a built response into Lua stack. The response is
+ * destroyed.
+ *
+ * @param port port with EXECUTE response.
+ * @param L Lua stack.
+ */
+static void
+port_sql_dump_lua(struct port *port, struct lua_State *L)
+{
+ assert(port->vtab == &port_sql_vtab);
+ sqlite3 *db = sql_get();
+ struct sqlite3_stmt *stmt = ((struct port_sql *)port)->stmt;
+ int column_count = sqlite3_column_count(stmt);
+ if (column_count > 0) {
+ int keys = 2;
+ lua_createtable(L, 0, keys);
+ lua_sql_get_description(stmt, L, column_count);
+ port_tuple_vtab.dump_lua(port, L);
+ lua_setfield(L, -2, "rows");
+ } else {
+ assert(((struct port_tuple *)port)->size == 0);
+ struct stailq *autoinc_id_list =
+ vdbe_autoinc_id_list((struct Vdbe *)stmt);
+
+ int dynamic_keys = stailq_empty(autoinc_id_list) ? 0 : 1;
+ lua_createtable(L, 1, dynamic_keys);
+
+ luaL_pushuint64(L, db->nChange);
+ lua_setfield(L, -2, "rowcount");
+
+ if (!stailq_empty(autoinc_id_list)) {
+ lua_newtable(L);
+ int i = 1;
+ struct autoinc_id_entry *id_entry;
+ stailq_foreach_entry(id_entry, autoinc_id_list, link) {
+ if (id_entry->id >= 0)
+ luaL_pushuint64(L, id_entry->id);
+ else
+ luaL_pushint64(L, id_entry->id);
+ lua_rawseti(L, -2, i++);
+ }
+ lua_setfield(L, -2, "autoincrement_ids");
+ }
+ }
+ port_destroy(port);
+ sqlite3_finalize(stmt);
+}
+
static void
port_sql_destroy(struct port *base)
{
@@ -691,7 +773,7 @@ port_tuple_to_port_sql(struct port *port, struct sqlite3_stmt *stmt)
const struct port_vtab port_sql_vtab = {
.dump_msgpack = port_sql_dump_msgpack,
.dump_msgpack_16 = NULL,
- .dump_lua = NULL,
+ .dump_lua = port_sql_dump_lua,
.dump_plain = NULL,
.destroy = port_sql_destroy,
};
diff --git a/src/box/lua/sql.c b/src/box/lua/sql.c
index 6923666..318f331 100644
--- a/src/box/lua/sql.c
+++ b/src/box/lua/sql.c
@@ -6,6 +6,7 @@
#include <info.h>
#include "lua/info.h"
#include "lua/utils.h"
+#include "box/execute.h"
static void
lua_push_column_names(struct lua_State *L, struct sqlite3_stmt *stmt)
@@ -111,6 +112,29 @@ sqlerror:
}
static int
+lbox_execute(struct lua_State *L)
+{
+ struct sql_bind *bind = NULL;
+ int bind_count = 0;
+ size_t length;
+ struct port port;
+
+ struct sqlite3 *db = sql_get();
+ if (db == NULL)
+ return luaL_error(L, "not ready");
+
+ const char *sql = lua_tolstring(L, 1, &length);
+ if (sql == NULL)
+ return luaL_error(L, "usage: box.execute(sqlstring)");
+
+ if (sql_prepare_and_execute(sql, length, bind, bind_count, &port,
+ &fiber()->gc) != 0)
+ return luaT_error(L);
+ port_dump_lua(&port, L);
+ return 1;
+}
+
+static int
lua_sql_debug(struct lua_State *L)
{
struct info_handler info;
@@ -124,6 +148,7 @@ box_lua_sqlite_init(struct lua_State *L)
{
static const struct luaL_Reg module_funcs [] = {
{"execute", lua_sql_execute},
+ {"new_execute", lbox_execute},
{"debug", lua_sql_debug},
{NULL, NULL}
};
--
2.7.4
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