[Tarantool-patches] [PATCH v1 11/21] sql: refactor ROW_COUNT() function

[Mergen Imeev via Tarantool-patches <tarantool-patches@dev.tarantool.org>]

Part of #4145
---
 src/box/sql/func.c   | 12 +++++++++++-
 src/box/sql/main.c   | 10 ----------
 src/box/sql/sqlInt.h |  8 +-------
 3 files changed, 12 insertions(+), 18 deletions(-)

diff --git a/src/box/sql/func.c b/src/box/sql/func.c
index c5428d87b..014fd9af2 100644
--- a/src/box/sql/func.c
+++ b/src/box/sql/func.c
@@ -988,6 +988,16 @@ func_round(struct sql_context *ctx, int argc, struct Mem *argv)
 	return mem_set_double(res, (double)(int64_t)(d + delta));
 }
 
+/** Implementation of the ROW_COUNT() function. */
+static void
+func_row_count(struct sql_context *ctx, int argc, struct Mem *argv)
+{
+	(void)argc;
+	(void)argv;
+	assert(sql_get()->nChange >= 0);
+	return mem_set_uint(ctx->pOut, sql_get()->nChange);
+}
+
 static const unsigned char *
 mem_as_ustr(struct Mem *mem)
 {
@@ -1869,7 +1879,7 @@ static struct sql_func_definition definitions[] = {
 	{"ROUND", 1, {FIELD_TYPE_DOUBLE}, FIELD_TYPE_DOUBLE, func_round, NULL},
 	{"ROUND", 2, {FIELD_TYPE_DOUBLE, FIELD_TYPE_INTEGER}, FIELD_TYPE_DOUBLE,
 	 func_round, NULL},
-	{"ROW_COUNT", 0, {}, FIELD_TYPE_INTEGER, sql_row_count, NULL},
+	{"ROW_COUNT", 0, {}, FIELD_TYPE_INTEGER, func_row_count, NULL},
 	{"SOUNDEX", 1, {FIELD_TYPE_STRING}, FIELD_TYPE_STRING, soundexFunc,
 	 NULL},
 	{"SUBSTR", 2, {FIELD_TYPE_STRING, FIELD_TYPE_INTEGER},
diff --git a/src/box/sql/main.c b/src/box/sql/main.c
index a4247c760..ae872aaa1 100644
--- a/src/box/sql/main.c
+++ b/src/box/sql/main.c
@@ -220,16 +220,6 @@ setupLookaside(sql * db, void *pBuf, int sz, int cnt)
 	return 0;
 }
 
-void
-sql_row_count(struct sql_context *context, int argc, struct Mem *argv)
-{
-	(void)argc;
-	(void)argv;
-	sql *db = sql_context_db_handle(context);
-	assert(db->nChange >= 0);
-	sql_result_uint(context, db->nChange);
-}
-
 /*
  * Close all open savepoints.
  * This procedure is trivial as savepoints are allocated on the "region" and
diff --git a/src/box/sql/sqlInt.h b/src/box/sql/sqlInt.h
index 9361775b1..c8f711ed2 100644
--- a/src/box/sql/sqlInt.h
+++ b/src/box/sql/sqlInt.h
@@ -470,12 +470,6 @@ enum sql_subtype {
 void
 sql_randomness(int N, void *P);
 
-/**
- * Return the number of affected rows in the last SQL statement.
- */
-void
-sql_row_count(struct sql_context *context, int argc, struct Mem *argv);
-
 int
 sql_column_count(sql_stmt * pStmt);
 
@@ -1065,7 +1059,7 @@ struct sql {
 	u8 dfltLockMode;	/* Default locking-mode for attached dbs */
 	u8 mTrace;		/* zero or more sql_TRACE flags */
 	u32 magic;		/* Magic number for detect library misuse */
-	/** Value returned by sql_row_count(). */
+	/** Value returned by ROW_COUNT(). */
 	int nChange;
 	int aLimit[SQL_N_LIMIT];	/* Limits */
 	int nMaxSorterMmap;	/* Maximum size of regions mapped by sorter */
-- 
2.25.1