[Tarantool-patches] [PATCH 04/15] sql: rename sqlPrepare() to sql_compile()

[Nikita Pettik <korablev@tarantool.org>]

sql_prepare() is going not only to compile statement, but also to save it
to the prepared statement cache. So we'd better rename sqlPrepare()
which is static wrapper around sql_prepare() and make it non-static.
Where it is possible let's use sql_compile() instead of sql_prepare().

Needed for #2592
---
 src/box/execute.c     |  2 +-
 src/box/sql/analyze.c |  6 +++---
 src/box/sql/legacy.c  |  2 +-
 src/box/sql/prepare.c | 21 ++++++---------------
 src/box/sql/sqlInt.h  | 13 +++++++++++++
 5 files changed, 24 insertions(+), 20 deletions(-)

diff --git a/src/box/execute.c b/src/box/execute.c
index 0b21386b5..83680b70f 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 region *region)
 {
 	struct sql_stmt *stmt;
-	if (sql_prepare(sql, len, &stmt, NULL) != 0)
+	if (sql_compile(sql, len, NULL, &stmt, NULL) != 0)
 		return -1;
 	assert(stmt != NULL);
 	port_sql_create(port, stmt);
diff --git a/src/box/sql/analyze.c b/src/box/sql/analyze.c
index 9a66f8254..a887a2bf3 100644
--- a/src/box/sql/analyze.c
+++ b/src/box/sql/analyze.c
@@ -1360,7 +1360,7 @@ load_stat_from_space(const char *sql_select_prepare,
 		}
 	}
 	sql_stmt *stmt = NULL;
-	int rc = sql_prepare(sql_select_prepare, -1, &stmt, 0);
+	int rc = sql_compile(sql_select_prepare, -1, NULL, &stmt, 0);
 	if (rc)
 		goto finalize;
 	uint32_t current_idx_count = 0;
@@ -1428,7 +1428,7 @@ load_stat_from_space(const char *sql_select_prepare,
 	rc = sql_finalize(stmt);
 	if (rc)
 		goto finalize;
-	rc = sql_prepare(sql_select_load, -1, &stmt, 0);
+	rc = sql_compile(sql_select_load, -1, NULL, &stmt, 0);
 	if (rc)
 		goto finalize;
 	struct index *prev_index = NULL;
@@ -1510,7 +1510,7 @@ load_stat_to_index(const char *sql_select_load, struct index_stat **stats)
 {
 	assert(stats != NULL && *stats != NULL);
 	struct sql_stmt *stmt = NULL;
-	if (sql_prepare(sql_select_load, -1, &stmt, 0) != 0)
+	if (sql_compile(sql_select_load, -1, NULL, &stmt, 0) != 0)
 		return -1;
 	uint32_t current_idx_count = 0;
 	while (sql_step(stmt) == SQL_ROW) {
diff --git a/src/box/sql/legacy.c b/src/box/sql/legacy.c
index e3a2c77ca..93f927dea 100644
--- a/src/box/sql/legacy.c
+++ b/src/box/sql/legacy.c
@@ -71,7 +71,7 @@ sql_exec(sql * db,	/* The database on which the SQL executes */
 		char **azVals = 0;
 
 		pStmt = 0;
-		rc = sql_prepare(zSql, -1, &pStmt, &zLeftover);
+		rc = sql_compile(zSql, -1, NULL, &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 f72f9aa23..780085e56 100644
--- a/src/box/sql/prepare.c
+++ b/src/box/sql/prepare.c
@@ -39,18 +39,11 @@
 #include "box/space.h"
 #include "box/session.h"
 
-/*
- * Compile the UTF-8 encoded SQL statement zSql into a statement handle.
- */
-static int
-sqlPrepare(sql * db,	/* Database handle. */
-	       const char *zSql,	/* UTF-8 encoded SQL statement. */
-	       int nBytes,	/* Length of zSql in bytes. */
-	       Vdbe * pReprepare,	/* VM being reprepared */
-	       sql_stmt ** ppStmt,	/* OUT: A pointer to the prepared statement */
-	       const char **pzTail	/* OUT: End of parsed string */
-    )
+int
+sql_compile(const char *zSql, int nBytes, struct Vdbe *pReprepare,
+	    sql_stmt **ppStmt, const char **pzTail)
 {
+	struct sql *db = sql_get();
 	int rc = 0;	/* Result code */
 	Parse sParse;		/* Parsing context */
 	sql_parser_create(&sParse, db, current_session()->sql_flags);
@@ -185,12 +178,10 @@ sqlReprepare(Vdbe * p)
 {
 	sql_stmt *pNew;
 	const char *zSql;
-	sql *db;
 
 	zSql = sql_sql((sql_stmt *) p);
 	assert(zSql != 0);	/* Reprepare only called for prepare_v2() statements */
-	db = sqlVdbeDb(p);
-	if (sqlPrepare(db, zSql, -1, p, &pNew, 0) != 0) {
+	if (sql_compile(zSql, -1, p, &pNew, 0) != 0) {
 		assert(pNew == 0);
 		return -1;
 	}
@@ -206,7 +197,7 @@ int
 sql_prepare(const char *sql, int length, struct sql_stmt **stmt,
 	    const char **sql_tail)
 {
-	int rc = sqlPrepare(sql_get(), sql, length, 0, stmt, sql_tail);
+	int rc = sql_compile(sql, length, 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 1bac252af..4a28e5fb9 100644
--- a/src/box/sql/sqlInt.h
+++ b/src/box/sql/sqlInt.h
@@ -459,6 +459,19 @@ typedef void (*sql_destructor_type) (void *);
 #define SQL_STATIC      ((sql_destructor_type)0)
 #define SQL_TRANSIENT   ((sql_destructor_type)-1)
 
+/**
+ * Compile the UTF-8 encoded SQL statement zSql into a statement handle.
+ *
+ * @param sql UTF-8 encoded SQL statement.
+ * @param sql_len Length of @sql in bytes.
+ * @param re_prepared VM being re-compiled. Can be NULL.
+ * @param[out] stmt A pointer to the compiled statement.
+ * @param[out] sql_tail End of parsed string.
+ */
+int
+sql_compile(const char *sql, int bytes_count, struct Vdbe *re_prepared,
+	    sql_stmt **stmt, const char **sql_tail);
+
 int
 sql_step(sql_stmt *);
 
-- 
2.15.1