[tarantool-patches] [PATCH 3/8] sql: remove sql_prepare_v2()

[Nikita Pettik <korablev@tarantool.org>]

There are two versions of the same function (sql_prepare()) which are
almost identical. Let's keep more relevant version sql_prepare_v2() but
rename it to sql_prepare() in order to avoid any mess.

Needed for #3292
---
 src/box/execute.c     |  2 +-
 src/box/sql/legacy.c  |  2 +-
 src/box/sql/prepare.c | 32 ++++----------------------------
 src/box/sql/sqlInt.h  | 25 +++++++++++--------------
 src/box/sql/vdbeapi.c |  2 +-
 5 files changed, 18 insertions(+), 45 deletions(-)

diff --git a/src/box/execute.c b/src/box/execute.c
index a6454d5bb..b8d161815 100644
--- a/src/box/execute.c
+++ b/src/box/execute.c
@@ -442,7 +442,7 @@ sql_prepare_and_execute(const char *sql, int len, const struct sql_bind *bind,
 {
 	struct sql_stmt *stmt;
 	struct sql *db = sql_get();
-	if (sql_prepare_v2(db, sql, len, &stmt, NULL) != 0)
+	if (sql_prepare(db, sql, len, &stmt, NULL) != 0)
 		return -1;
 	assert(stmt != NULL);
 	port_sql_create(port, stmt);
diff --git a/src/box/sql/legacy.c b/src/box/sql/legacy.c
index 0b1370f4a..bfd1e32b9 100644
--- a/src/box/sql/legacy.c
+++ b/src/box/sql/legacy.c
@@ -70,7 +70,7 @@ sql_exec(sql * db,	/* The database on which the SQL executes */
 		char **azVals = 0;
 
 		pStmt = 0;
-		rc = sql_prepare_v2(db, zSql, -1, &pStmt, &zLeftover);
+		rc = sql_prepare(db, zSql, -1, &pStmt, &zLeftover);
 		assert(rc == 0 || pStmt == NULL);
 		if (rc != 0)
 			continue;
diff --git a/src/box/sql/prepare.c b/src/box/sql/prepare.c
index e077a8b5e..ba3b7d71f 100644
--- a/src/box/sql/prepare.c
+++ b/src/box/sql/prepare.c
@@ -204,36 +204,12 @@ sqlReprepare(Vdbe * p)
 	return 0;
 }
 
-/*
- * Two versions of the official API.  Legacy and new use.  In the legacy
- * version, the original SQL text is not saved in the prepared statement
- * and so if a schema change occurs, an error is returned by
- * sql_step().  In the new version, the original SQL text is retained
- * and the statement is automatically recompiled if an schema change
- * occurs.
- */
-int
-sql_prepare(sql * db,		/* Database handle. */
-		const char *zSql,	/* UTF-8 encoded SQL statement. */
-		int nBytes,		/* Length of zSql in bytes. */
-		sql_stmt ** ppStmt,	/* OUT: A pointer to the prepared statement */
-		const char **pzTail)	/* OUT: End of parsed string */
-{
-	int rc = sqlPrepare(db, zSql, nBytes, 0, 0, ppStmt, pzTail);
-	assert(rc == 0 || ppStmt == NULL || *ppStmt == NULL);	/* VERIFY: F13021 */
-	return rc;
-}
-
 int
-sql_prepare_v2(sql * db,	/* Database handle. */
-		   const char *zSql,	/* UTF-8 encoded SQL statement. */
-		   int nBytes,	/* Length of zSql in bytes. */
-		   sql_stmt ** ppStmt,	/* OUT: A pointer to the prepared statement */
-		   const char **pzTail	/* OUT: End of parsed string */
-    )
+sql_prepare(struct sql *db, const char *sql, int length, struct sql_stmt **stmt,
+	    const char **sql_tail)
 {
-	int rc = sqlPrepare(db, zSql, nBytes, 1, 0, ppStmt, pzTail);
-	assert(rc == 0 || ppStmt == NULL || *ppStmt == NULL);	/* VERIFY: F13021 */
+	int rc = sqlPrepare(db, sql, length, 1, 0, stmt, sql_tail);
+	assert(rc == 0 || stmt == NULL || *stmt == NULL);
 	return rc;
 }
 
diff --git a/src/box/sql/sqlInt.h b/src/box/sql/sqlInt.h
index f01fe0e30..2ad96b93a 100644
--- a/src/box/sql/sqlInt.h
+++ b/src/box/sql/sqlInt.h
@@ -447,21 +447,18 @@ 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 db Database handle.
+ * @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(sql * db,	/* Database handle */
-		const char *zSql,	/* SQL statement, UTF-8 encoded */
-		int nByte,	/* Maximum length of zSql in bytes. */
-		sql_stmt ** ppStmt,	/* OUT: Statement handle */
-		const char **pzTail	/* OUT: Pointer to unused portion of zSql */
-	);
-
-int
-sql_prepare_v2(sql * db,	/* Database handle */
-		   const char *zSql,	/* SQL statement, UTF-8 encoded */
-		   int nByte,	/* Maximum length of zSql in bytes. */
-		   sql_stmt ** ppStmt,	/* OUT: Statement handle */
-		   const char **pzTail	/* OUT: Pointer to unused portion of zSql */
-	);
+sql_prepare(struct sql *db, const char *sql, int length, struct sql_stmt **stmt,
+	    const char **sql_tail);
 
 int
 sql_step(sql_stmt *);
diff --git a/src/box/sql/vdbeapi.c b/src/box/sql/vdbeapi.c
index dfaff9365..0b54a9429 100644
--- a/src/box/sql/vdbeapi.c
+++ b/src/box/sql/vdbeapi.c
@@ -455,7 +455,7 @@ sqlStep(Vdbe * p)
 		checkProfileCallback(db, p);
 
 	if (p->isPrepareV2 && rc != SQL_ROW && rc != SQL_DONE) {
-		/* If this statement was prepared using sql_prepare_v2(), and an
+		/* If this statement was prepared using sql_prepare(), and an
 		 * error has occurred, then return an error.
 		 */
 		if (p->is_aborted)
-- 
2.15.1