[tarantool-patches] [PATCH v2 1/2] sql: add ARRAY, MAP and ANY types to mem_apply_type()

[imeevma@tarantool.org]

Function mem_apply_type() implements implicit type conversion. As
a rule, tuple to be inserted to the space is exposed to this
conversion which is invoked during execution of OP_MakeRecord
opcode (which in turn forms tuple). This function was not adjusted
to operate on ARRAY, MAP and ANY field types since they are poorly
supported in current SQL implementation. Hence, when tuple to be
inserted in space having mentioned field types reaches this
function, it results in error. Note that we can't set ARRAY or MAP
types in SQL, but such situation may appear during UPDATE
operation on space created via Lua interface. This problem is
solved by extending implicit type conversions with obvious casts:
array field can be casted to array, map to map and any to any.

Closes #4189
---
 src/box/sql/vdbe.c      | 35 ++++++++++++++++++++++++++++++++++-
 test/sql/types.result   | 40 ++++++++++++++++++++++++++++++++++++++++
 test/sql/types.test.lua | 15 +++++++++++++++
 3 files changed, 89 insertions(+), 1 deletion(-)

diff --git a/src/box/sql/vdbe.c b/src/box/sql/vdbe.c
index 6a4a303..1200ff4 100644
--- a/src/box/sql/vdbe.c
+++ b/src/box/sql/vdbe.c
@@ -292,7 +292,19 @@ mem_apply_numeric_type(struct Mem *record)
  *    Convert mem to a string representation.
  *
  * SCALAR:
- *    Mem is unchanged, but flag is set to BLOB.
+ *    Mem is unchanged, but flag is set to BLOB in case of
+ *    scalar-like type. Otherwise, (MAP, ARRAY) conversion
+ *    is impossible.
+ *
+ * BOOLEAN:
+ *    If memory holds BOOLEAN no actions take place.
+ *
+ * ANY:
+ *    Mem is unchanged, no actions take place.
+ *
+ * MAP/ARRAY:
+ *    These types can't be casted to scalar ones, or to each
+ *    other. So the only valid conversion is to type itself.
  *
  * @param record The value to apply type to.
  * @param type The type to be applied.
@@ -338,6 +350,27 @@ mem_apply_type(struct Mem *record, enum field_type type)
 		record->flags &= ~(MEM_Real | MEM_Int);
 		return 0;
 	case FIELD_TYPE_SCALAR:
+		/* Can't cast MAP and ARRAY to scalar types. */
+		if ((record->flags & MEM_Subtype) != 0 &&
+		    record->subtype == SQL_SUBTYPE_MSGPACK) {
+			assert(mp_typeof(*record->z) == MP_MAP ||
+			       mp_typeof(*record->z) == MP_ARRAY);
+			return -1;
+		}
+		return 0;
+	case FIELD_TYPE_MAP:
+		if ((record->flags & MEM_Subtype) != 0 &&
+		    record->subtype == SQL_SUBTYPE_MSGPACK &&
+		    mp_typeof(*record->z) == MP_MAP)
+			return 0;
+		return -1;
+	case FIELD_TYPE_ARRAY:
+		if ((record->flags & MEM_Subtype) != 0 &&
+		    record->subtype == SQL_SUBTYPE_MSGPACK &&
+		    mp_typeof(*record->z) == MP_ARRAY)
+			return 0;
+		return -1;
+	case FIELD_TYPE_ANY:
 		return 0;
 	default:
 		return -1;
diff --git a/test/sql/types.result b/test/sql/types.result
index 5abe6e0..0dba69f 100644
--- a/test/sql/types.result
+++ b/test/sql/types.result
@@ -1110,6 +1110,46 @@ box.execute("SELECT a FROM t1 WHERE a IN (1.1, 2.1);")
     type: unsigned
   rows: []
 ...
+--
+-- gh-4189: make sure that update doesn't throw an error if format
+-- of table features map/array field types.
+--
+format = {}
+---
+...
+format[1] = {type = 'integer', name = 'I'}
+---
+...
+format[2] = {type = 'boolean', name = 'B'}
+---
+...
+format[3] = {type = 'array', name = 'F1'}
+---
+...
+format[4] = {type = 'map', name = 'F2'}
+---
+...
+format[5] = {type = 'any', name = 'F3'}
+---
+...
+s = box.schema.space.create('T', {format = format})
+---
+...
+ii = s:create_index('ii')
+---
+...
+s:insert({1, true, {1, 2}, {a = 3}, 'asd'})
+---
+- [1, true, [1, 2], {'a': 3}, 'asd']
+...
+box.execute('UPDATE t SET b = false WHERE i = 1;')
+---
+- row_count: 1
+...
+s:select()
+---
+- - [1, false, [1, 2], {'a': 3}, 'asd']
+...
 s:drop()
 ---
 ...
diff --git a/test/sql/types.test.lua b/test/sql/types.test.lua
index 410864a..22cb105 100644
--- a/test/sql/types.test.lua
+++ b/test/sql/types.test.lua
@@ -275,4 +275,19 @@ _ = s:create_index('sk', { parts = { 'A' } })
 s:insert({ 1, 1 })
 box.execute("SELECT a FROM t1 WHERE a IN (1.1, 2.1);")
 
+--
+-- gh-4189: make sure that update doesn't throw an error if format
+-- of table features map/array field types.
+--
+format = {}
+format[1] = {type = 'integer', name = 'I'}
+format[2] = {type = 'boolean', name = 'B'}
+format[3] = {type = 'array', name = 'F1'}
+format[4] = {type = 'map', name = 'F2'}
+format[5] = {type = 'any', name = 'F3'}
+s = box.schema.space.create('T', {format = format})
+ii = s:create_index('ii')
+s:insert({1, true, {1, 2}, {a = 3}, 'asd'})
+box.execute('UPDATE t SET b = false WHERE i = 1;')
+s:select()
 s:drop()
-- 
2.7.4