[tarantool-patches] [PATCH v9 5/7] iproto: create port_sql
imeevma at tarantool.org
imeevma at tarantool.org
Fri Mar 22 13:50:40 MSK 2019
This patch creates port_sql implementation for the port. This will
allow us to dump sql responses to obuf or to Lua. Also this patch
defines methods dump_msgpack() and destroy() of port_sql.
Part of #3505
---
src/box/execute.c | 263 +++++++++++++++++++++++++++++++++++-------------------
src/box/execute.h | 49 +---------
src/box/iproto.cc | 12 ++-
src/box/port.h | 1 -
4 files changed, 182 insertions(+), 143 deletions(-)
diff --git a/src/box/execute.c b/src/box/execute.c
index 5810086..460eebc 100644
--- a/src/box/execute.c
+++ b/src/box/execute.c
@@ -83,6 +83,92 @@ struct sql_bind {
};
/**
+ * Port implementation that is used to store SQL responses and
+ * output them to obuf or Lua. This port implementation is
+ * inherited from the port_tuple structure. This allows us to use
+ * this structure in the port_tuple methods instead of port_tuple
+ * itself.
+ *
+ * The methods of port_tuple are called via explicit access to
+ * port_tuple_vtab just like C++ does with BaseClass::method, when
+ * it is called in a child method.
+ */
+struct port_sql {
+ /* port_tuple to inherit from. */
+ struct port_tuple port_tuple;
+ /* Prepared SQL statement. */
+ struct sql_stmt *stmt;
+};
+
+static_assert(sizeof(struct port_sql) <= sizeof(struct port),
+ "sizeof(struct port_sql) must be <= sizeof(struct port)");
+
+/**
+ * Dump data from port to buffer. Data in port contains tuples,
+ * metadata, or information obtained from an executed SQL query.
+ *
+ * Dumped msgpack structure:
+ * +----------------------------------------------+
+ * | IPROTO_BODY: { |
+ * | IPROTO_METADATA: [ |
+ * | {IPROTO_FIELD_NAME: column name1}, |
+ * | {IPROTO_FIELD_NAME: column name2}, |
+ * | ... |
+ * | ], |
+ * | |
+ * | IPROTO_DATA: [ |
+ * | tuple, tuple, tuple, ... |
+ * | ] |
+ * | } |
+ * +-------------------- OR ----------------------+
+ * | IPROTO_BODY: { |
+ * | IPROTO_SQL_INFO: { |
+ * | SQL_INFO_ROW_COUNT: number |
+ * | SQL_INFO_AUTOINCREMENT_IDS: [ |
+ * | id, id, id, ... |
+ * | ] |
+ * | } |
+ * | } |
+ * +-------------------- OR ----------------------+
+ * | IPROTO_BODY: { |
+ * | IPROTO_SQL_INFO: { |
+ * | SQL_INFO_ROW_COUNT: number |
+ * | } |
+ * | } |
+ * +----------------------------------------------+
+ * @param port Port that contains SQL response.
+ * @param[out] out Output buffer.
+ *
+ * @retval 0 Success.
+ * @retval -1 Memory error.
+ */
+static int
+port_sql_dump_msgpack(struct port *port, struct obuf *out);
+
+static void
+port_sql_destroy(struct port *base)
+{
+ port_tuple_vtab.destroy(base);
+ sql_finalize(((struct port_sql *)base)->stmt);
+}
+
+static const struct port_vtab port_sql_vtab = {
+ /* .dump_msgpack = */ port_sql_dump_msgpack,
+ /* .dump_msgpack_16 = */ NULL,
+ /* .dump_lua = */ NULL,
+ /* .dump_plain = */ NULL,
+ /* .destroy = */ port_sql_destroy,
+};
+
+static void
+port_sql_create(struct port *port, struct sql_stmt *stmt)
+{
+ port_tuple_create(port);
+ ((struct port_sql *)port)->stmt = stmt;
+ port->vtab = &port_sql_vtab;
+}
+
+/**
* Return a string name of a parameter marker.
* @param Bind to get name.
* @retval Zero terminated name.
@@ -504,108 +590,36 @@ sql_get_description(struct sql_stmt *stmt, struct obuf *out,
return 0;
}
-static inline int
-sql_execute(sql *db, struct sql_stmt *stmt, struct port *port,
- struct region *region)
-{
- int rc, column_count = sql_column_count(stmt);
- if (column_count > 0) {
- /* Either ROW or DONE or ERROR. */
- while ((rc = sql_step(stmt)) == SQL_ROW) {
- if (sql_row_to_port(stmt, column_count, region,
- port) != 0)
- return -1;
- }
- assert(rc == SQL_DONE || rc != SQL_OK);
- } else {
- /* No rows. Either DONE or ERROR. */
- rc = sql_step(stmt);
- assert(rc != SQL_ROW && rc != SQL_OK);
- }
- if (rc != SQL_DONE) {
- if (db->errCode != SQL_TARANTOOL_ERROR) {
- const char *err = (char *)sql_value_text(db->pErr);
- if (err == NULL)
- err = sqlErrStr(db->errCode);
- diag_set(ClientError, ER_VDBE_EXECUTE, err);
- }
- return -1;
- }
- return 0;
-}
-
-int
-sql_prepare_and_execute(const char *sql, int len, const struct sql_bind *bind,
- uint32_t bind_count, struct sql_response *response,
- struct region *region)
-{
- struct sql_stmt *stmt;
- struct sql *db = sql_get();
- if (db == NULL) {
- diag_set(ClientError, ER_LOADING);
- return -1;
- }
- if (sql_prepare_v2(db, sql, len, &stmt, NULL) != SQL_OK) {
- if (db->errCode != SQL_TARANTOOL_ERROR) {
- const char *err = (char *)sql_value_text(db->pErr);
- if (err == NULL)
- err = sqlErrStr(db->errCode);
- diag_set(ClientError, ER_VDBE_EXECUTE, err);
- }
- return -1;
- }
- assert(stmt != NULL);
- port_tuple_create(&response->port);
- response->prep_stmt = stmt;
- if (sql_bind(stmt, bind, bind_count) == 0 &&
- sql_execute(db, stmt, &response->port, region) == 0)
- return 0;
- port_destroy(&response->port);
- sql_finalize(stmt);
- return -1;
-}
-
-int
-sql_response_dump(struct sql_response *response, struct obuf *out)
+static int
+port_sql_dump_msgpack(struct port *port, struct obuf *out)
{
+ assert(port->vtab == &port_sql_vtab);
sql *db = sql_get();
- struct sql_stmt *stmt = (struct sql_stmt *) response->prep_stmt;
- struct port_tuple *port_tuple = (struct port_tuple *) &response->port;
- int rc = 0, column_count = sql_column_count(stmt);
+ struct sql_stmt *stmt = ((struct port_sql *)port)->stmt;
+ int column_count = sql_column_count(stmt);
if (column_count > 0) {
int keys = 2;
int size = mp_sizeof_map(keys);
char *pos = (char *) obuf_alloc(out, size);
if (pos == NULL) {
diag_set(OutOfMemory, size, "obuf_alloc", "pos");
- goto err;
+ return -1;
}
pos = mp_encode_map(pos, keys);
- if (sql_get_description(stmt, out, column_count) != 0) {
-err:
- rc = -1;
- goto finish;
- }
- size = mp_sizeof_uint(IPROTO_DATA) +
- mp_sizeof_array(port_tuple->size);
+ if (sql_get_description(stmt, out, column_count) != 0)
+ return -1;
+ size = mp_sizeof_uint(IPROTO_DATA);
pos = (char *) obuf_alloc(out, size);
if (pos == NULL) {
diag_set(OutOfMemory, size, "obuf_alloc", "pos");
- goto err;
+ return -1;
}
pos = mp_encode_uint(pos, IPROTO_DATA);
- pos = mp_encode_array(pos, port_tuple->size);
- /*
- * Just like SELECT, SQL uses output format compatible
- * with Tarantool 1.6
- */
- if (port_dump_msgpack_16(&response->port, out) < 0) {
- /* Failed port dump destroyes the port. */
- goto err;
- }
+ if (port_tuple_vtab.dump_msgpack(port, out) < 0)
+ return -1;
} else {
int keys = 1;
- assert(port_tuple->size == 0);
+ assert(((struct port_tuple *)port)->size == 0);
struct stailq *autoinc_id_list =
vdbe_autoinc_id_list((struct Vdbe *)stmt);
uint32_t map_size = stailq_empty(autoinc_id_list) ? 1 : 2;
@@ -615,7 +629,7 @@ err:
char *pos = (char *) obuf_alloc(out, size);
if (pos == NULL) {
diag_set(OutOfMemory, size, "obuf_alloc", "pos");
- goto err;
+ return -1;
}
pos = mp_encode_map(pos, keys);
pos = mp_encode_uint(pos, IPROTO_SQL_INFO);
@@ -638,7 +652,7 @@ err:
char *buf = obuf_alloc(out, size);
if (buf == NULL) {
diag_set(OutOfMemory, size, "obuf_alloc", "buf");
- goto err;
+ return -1;
}
buf = mp_encode_uint(buf, SQL_INFO_ROW_COUNT);
buf = mp_encode_uint(buf, changes);
@@ -653,8 +667,75 @@ err:
}
}
}
-finish:
- port_destroy(&response->port);
- sql_finalize(stmt);
- return rc;
+ return 0;
+}
+
+/**
+ * Execute prepared SQL statement.
+ *
+ * This function uses region to allocate memory for temporary
+ * objects. After this function, region will be in the same state
+ * in which it was before this function.
+ *
+ * @param db SQL handle.
+ * @param stmt Prepared statement.
+ * @param port Port to store SQL response.
+ * @param region Region to allocate temporary objects.
+ *
+ * @retval 0 Success.
+ * @retval -1 Error.
+ */
+static inline int
+sql_execute(sql *db, struct sql_stmt *stmt, struct port *port,
+ struct region *region)
+{
+ int rc, column_count = sql_column_count(stmt);
+ if (column_count > 0) {
+ /* Either ROW or DONE or ERROR. */
+ while ((rc = sql_step(stmt)) == SQL_ROW) {
+ if (sql_row_to_port(stmt, column_count, region,
+ port) != 0)
+ return -1;
+ }
+ assert(rc == SQL_DONE || rc != SQL_OK);
+ } else {
+ /* No rows. Either DONE or ERROR. */
+ rc = sql_step(stmt);
+ assert(rc != SQL_ROW && rc != SQL_OK);
+ }
+ if (rc != SQL_DONE) {
+ if (db->errCode != SQL_TARANTOOL_ERROR) {
+ const char *err = (char *)sql_value_text(db->pErr);
+ if (err == NULL)
+ err = sqlErrStr(db->errCode);
+ diag_set(ClientError, ER_VDBE_EXECUTE, err);
+ }
+ return -1;
+ }
+ return 0;
+}
+
+int
+sql_prepare_and_execute(const char *sql, int len, const struct sql_bind *bind,
+ uint32_t bind_count, struct port *port,
+ struct region *region)
+{
+ struct sql_stmt *stmt;
+ struct sql *db = sql_get();
+ if (sql_prepare_v2(db, sql, len, &stmt, NULL) != SQL_OK) {
+ if (db->errCode != SQL_TARANTOOL_ERROR) {
+ const char *err = (char *)sql_value_text(db->pErr);
+ if (err == NULL)
+ err = sqlErrStr(db->errCode);
+ diag_set(ClientError, ER_VDBE_EXECUTE, err);
+ }
+ return -1;
+ }
+ assert(stmt != NULL);
+ port_sql_create(port, stmt);
+ if (sql_bind(stmt, bind, bind_count) == 0 &&
+ sql_execute(db, stmt, port, region) == 0)
+ return 0;
+ port_destroy(port);
+ return -1;
}
diff --git a/src/box/execute.h b/src/box/execute.h
index 12d893a..52563cd 100644
--- a/src/box/execute.h
+++ b/src/box/execute.h
@@ -48,18 +48,9 @@ enum sql_info_key {
extern const char *sql_info_key_strs[];
-struct obuf;
struct region;
struct sql_bind;
-/** Response on EXECUTE request. */
-struct sql_response {
- /** Port with response data if any. */
- struct port port;
- /** Prepared SQL statement with metadata. */
- void *prep_stmt;
-};
-
/**
* Parse MessagePack array of SQL parameters.
* @param data MessagePack array of parameters. Each parameter
@@ -76,48 +67,12 @@ int
sql_bind_list_decode(const char *data, struct sql_bind **out_bind);
/**
- * Dump a built response into @an out buffer. The response is
- * destroyed.
- * Response structure:
- * +----------------------------------------------+
- * | IPROTO_OK, sync, schema_version ... | iproto_header
- * +----------------------------------------------+---------------
- * | Body - a map with one or two keys. |
- * | |
- * | IPROTO_BODY: { |
- * | IPROTO_METADATA: [ |
- * | {IPROTO_FIELD_NAME: column name1}, |
- * | {IPROTO_FIELD_NAME: column name2}, | iproto_body
- * | ... |
- * | ], |
- * | |
- * | IPROTO_DATA: [ |
- * | tuple, tuple, tuple, ... |
- * | ] |
- * | } |
- * +-------------------- OR ----------------------+
- * | IPROTO_BODY: { |
- * | IPROTO_SQL_INFO: { |
- * | SQL_INFO_ROW_COUNT: number |
- * | } |
- * | } |
- * +----------------------------------------------+
- * @param response EXECUTE response.
- * @param out Output buffer.
- *
- * @retval 0 Success.
- * @retval -1 Memory error.
- */
-int
-sql_response_dump(struct sql_response *response, struct obuf *out);
-
-/**
* Prepare and execute an SQL statement.
* @param sql SQL statement.
* @param len Length of @a sql.
* @param bind Array of parameters.
* @param bind_count Length of @a bind.
- * @param[out] response Response to store result.
+ * @param[out] port Port to store SQL response.
* @param region Runtime allocator for temporary objects
* (columns, tuples ...).
*
@@ -126,7 +81,7 @@ sql_response_dump(struct sql_response *response, struct obuf *out);
*/
int
sql_prepare_and_execute(const char *sql, int len, const struct sql_bind *bind,
- uint32_t bind_count, struct sql_response *response,
+ uint32_t bind_count, struct port *port,
struct region *region);
#if defined(__cplusplus)
diff --git a/src/box/iproto.cc b/src/box/iproto.cc
index 3b0ba62..1e88bf0 100644
--- a/src/box/iproto.cc
+++ b/src/box/iproto.cc
@@ -1621,7 +1621,7 @@ tx_process_sql(struct cmsg *m)
{
struct iproto_msg *msg = tx_accept_msg(m);
struct obuf *out;
- struct sql_response response;
+ struct port port;
struct sql_bind *bind;
int bind_count;
const char *sql;
@@ -1638,7 +1638,7 @@ tx_process_sql(struct cmsg *m)
goto error;
sql = msg->sql.sql_text;
sql = mp_decode_str(&sql, &len);
- if (sql_prepare_and_execute(sql, len, bind, bind_count, &response,
+ if (sql_prepare_and_execute(sql, len, bind, bind_count, &port,
&fiber()->gc) != 0)
goto error;
/*
@@ -1648,12 +1648,16 @@ tx_process_sql(struct cmsg *m)
out = msg->connection->tx.p_obuf;
struct obuf_svp header_svp;
/* Prepare memory for the iproto header. */
- if (iproto_prepare_header(out, &header_svp, IPROTO_HEADER_LEN) != 0)
+ if (iproto_prepare_header(out, &header_svp, IPROTO_HEADER_LEN) != 0) {
+ port_destroy(&port);
goto error;
- if (sql_response_dump(&response, out) != 0) {
+ }
+ if (port_dump_msgpack(&port, out) != 0) {
+ port_destroy(&port);
obuf_rollback_to_svp(out, &header_svp);
goto error;
}
+ port_destroy(&port);
iproto_reply_sql(out, &header_svp, msg->header.sync, schema_version);
iproto_wpos_create(&msg->wpos, out);
return;
diff --git a/src/box/port.h b/src/box/port.h
index ad1b349..f188036 100644
--- a/src/box/port.h
+++ b/src/box/port.h
@@ -65,7 +65,6 @@ extern const struct port_vtab port_tuple_vtab;
static inline struct port_tuple *
port_tuple(struct port *port)
{
- assert(port->vtab == &port_tuple_vtab);
return (struct port_tuple *)port;
}
--
2.7.4
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