[Tarantool-patches] [PATCH v2 10/16] sql: add sql_stmt_schema_version()

[Nikita Pettik <korablev@tarantool.org>]

Let's introduce interface function to get schema version of prepared
statement. It is required since sturct sql_stmt (i.e. prepared
statement) is an opaque object and in fact is an alias to struct Vdbe.
Statements with schema version different from the current one are
considered to be expired and should be re-compiled.

Needed for #2592
---
 src/box/sql/sqlInt.h  | 3 +++
 src/box/sql/vdbeapi.c | 7 +++++++
 2 files changed, 10 insertions(+)

diff --git a/src/box/sql/sqlInt.h b/src/box/sql/sqlInt.h
index 8fc4b79db..22cb9a5e4 100644
--- a/src/box/sql/sqlInt.h
+++ b/src/box/sql/sqlInt.h
@@ -570,6 +570,9 @@ sql_column_name(sql_stmt *, int N);
 const char *
 sql_column_datatype(sql_stmt *, int N);
 
+uint32_t
+sql_stmt_schema_version(sql_stmt *stmt);
+
 int
 sql_initialize(void);
 
diff --git a/src/box/sql/vdbeapi.c b/src/box/sql/vdbeapi.c
index c090bd4bb..da528a4dc 100644
--- a/src/box/sql/vdbeapi.c
+++ b/src/box/sql/vdbeapi.c
@@ -798,6 +798,13 @@ sql_column_decltype(sql_stmt * pStmt, int N)
 			  COLNAME_DECLTYPE);
 }
 
+uint32_t
+sql_stmt_schema_version(sql_stmt *stmt)
+{
+	struct Vdbe *v = (struct Vdbe *) stmt;
+	return v->schema_ver;
+}
+
 /******************************* sql_bind_  **************************
  *
  * Routines used to attach values to wildcards in a compiled SQL statement.
-- 
2.15.1