[Tarantool-patches] [PATCH v2 03/16] sql: move sql_prepare() declaration to box/execute.h

[Nikita Pettik <korablev@tarantool.org>]

We are going to split sql_prepare_and_execute() into several explicit
and logically separated steps:

1. sql_prepare() -- compile VDBE byte-code
2. sql_bind() -- bind variables (if there are any)
3. sql_execute() -- query (byte-code) execution in virtual machine

For instance, for dry-run we are interested only in query preparation.
Contrary, if we had prepared statement cache, we could skip query
preparation and handle only bind and execute steps.

To avoid inclusion of sql/sqlInt.h header (which gathers almost all SQL
specific functions and constants) let's move sql_prepare() to
box/execute.h header (which already holds sql_prepare_and_execute()).

Needed for #3292
---
 src/box/execute.h     | 12 ++++++++++++
 src/box/sql/analyze.c |  1 +
 src/box/sql/legacy.c  |  1 +
 src/box/sql/sqlInt.h  | 12 ------------
 4 files changed, 14 insertions(+), 12 deletions(-)

diff --git a/src/box/execute.h b/src/box/execute.h
index a2fd4d1b7..a6000c08b 100644
--- a/src/box/execute.h
+++ b/src/box/execute.h
@@ -89,6 +89,18 @@ struct port_sql {
 
 extern const struct port_vtab port_sql_vtab;
 
+/**
+ * Prepare (compile into VDBE byte-code) statement.
+ *
+ * @param sql UTF-8 encoded SQL statement.
+ * @param length Length of @param sql in bytes.
+ * @param[out] stmt A pointer to the prepared statement.
+ * @param[out] sql_tail End of parsed string.
+ */
+int
+sql_prepare(const char *sql, int length, struct sql_stmt **stmt,
+	    const char **sql_tail);
+
 #if defined(__cplusplus)
 } /* extern "C" { */
 #endif
diff --git a/src/box/sql/analyze.c b/src/box/sql/analyze.c
index 1eba1e206..9a66f8254 100644
--- a/src/box/sql/analyze.c
+++ b/src/box/sql/analyze.c
@@ -106,6 +106,7 @@
  */
 
 #include "box/box.h"
+#include "box/execute.h"
 #include "box/index.h"
 #include "box/key_def.h"
 #include "box/schema.h"
diff --git a/src/box/sql/legacy.c b/src/box/sql/legacy.c
index 16507b334..e3a2c77ca 100644
--- a/src/box/sql/legacy.c
+++ b/src/box/sql/legacy.c
@@ -37,6 +37,7 @@
  */
 
 #include "sqlInt.h"
+#include "box/execute.h"
 #include "box/session.h"
 
 /*
diff --git a/src/box/sql/sqlInt.h b/src/box/sql/sqlInt.h
index ac1d8ce42..3ca10778e 100644
--- a/src/box/sql/sqlInt.h
+++ b/src/box/sql/sqlInt.h
@@ -468,18 +468,6 @@ typedef void (*sql_destructor_type) (void *);
 #define SQL_STATIC      ((sql_destructor_type)0)
 #define SQL_TRANSIENT   ((sql_destructor_type)-1)
 
-/**
- * Prepare (compile into VDBE byte-code) statement.
- *
- * @param sql UTF-8 encoded SQL statement.
- * @param length Length of @param sql in bytes.
- * @param[out] stmt A pointer to the prepared statement.
- * @param[out] sql_tail End of parsed string.
- */
-int
-sql_prepare(const char *sql, int length, struct sql_stmt **stmt,
-	    const char **sql_tail);
-
 int
 sql_step(sql_stmt *);
 
-- 
2.15.1