[tarantool-patches] [PATCH v2 1/1] sql: remove ephemeral Expr from AddDefaultValue
Kirill Shcherbatov
kshcherbatov at tarantool.org
Tue Apr 17 18:01:39 MSK 2018
As we don't need Expr tree in DDL we could store only
string representation that's better to understand.
Needed for #3051.
---
src/box/sql.c | 10 ++++------
src/box/sql/build.c | 32 ++++++++++++++------------------
2 files changed, 18 insertions(+), 24 deletions(-)
diff --git a/src/box/sql.c b/src/box/sql.c
index 6bc82c2..4df9eeb 100644
--- a/src/box/sql.c
+++ b/src/box/sql.c
@@ -1467,7 +1467,7 @@ int tarantoolSqlite3MakeTableFormat(Table *pTable, void *buf)
const char *t;
struct coll *coll = NULL;
struct field_def *field = &pTable->def->fields[i];
- struct Expr *def = field->default_value_expr;
+ const char *zToken = field->default_value;
if (aCol[i].zColl != NULL &&
strcasecmp(aCol[i].zColl, "binary") != 0) {
coll = sqlite3FindCollSeq(aCol[i].zColl);
@@ -1475,7 +1475,7 @@ int tarantoolSqlite3MakeTableFormat(Table *pTable, void *buf)
int base_len = 4;
if (coll != NULL)
base_len += 1;
- if (def != NULL)
+ if (zToken != NULL)
base_len += 1;
p = enc->encode_map(p, base_len);
p = enc->encode_str(p, "name", 4);
@@ -1499,11 +1499,9 @@ int tarantoolSqlite3MakeTableFormat(Table *pTable, void *buf)
p = enc->encode_str(p, "collation", strlen("collation"));
p = enc->encode_uint(p, coll->id);
}
- if (def != NULL) {
- assert((def->flags & EP_IntValue) == 0);
- assert(def->u.zToken != NULL);
+ if (zToken != NULL) {
p = enc->encode_str(p, "default", strlen("default"));
- p = enc->encode_str(p, def->u.zToken, strlen(def->u.zToken));
+ p = enc->encode_str(p, zToken, strlen(zToken));
}
}
return (int)(p - base);
diff --git a/src/box/sql/build.c b/src/box/sql/build.c
index 394ee3a..4406955 100644
--- a/src/box/sql/build.c
+++ b/src/box/sql/build.c
@@ -399,6 +399,8 @@ deleteTable(sqlite3 * db, Table * pTable)
if (pTable->def) {
/* fields has been allocated on separate region */
struct field_def *fields = pTable->def->fields;
+ for (uint32_t i = 0; i < pTable->def->field_count; ++i)
+ sqlite3DbFree(sql_get(), fields[i].default_value);
space_def_delete(pTable->def);
sqlite3DbFree(db, fields);
}
@@ -889,27 +891,21 @@ sqlite3AddDefaultValue(Parse * pParse, ExprSpan * pSpan)
"default value of column [%s] is not constant",
pCol->zName);
} else {
- /* A copy of pExpr is used instead of the original, as pExpr contains
- * tokens that point to volatile memory. The 'span' of the expression
- * is required by pragma table_info.
- */
- Expr x;
assert(p->def);
struct field_def *field =
&p->def->fields[p->nCol - 1];
- sql_expr_free(db, field->default_value_expr, false);
-
- memset(&x, 0, sizeof(x));
- x.op = TK_SPAN;
- x.u.zToken = sqlite3DbStrNDup(db, (char *)pSpan->zStart,
- (int)(pSpan->zEnd -
- pSpan->zStart));
- x.pLeft = pSpan->pExpr;
- x.flags = EP_Skip;
-
- field->default_value_expr =
- sqlite3ExprDup(db, &x, EXPRDUP_REDUCE);
- sqlite3DbFree(db, x.u.zToken);
+
+ sqlite3DbFree(db, field->default_value);
+ field->default_value =
+ sqlite3DbStrNDup(db, (char *)pSpan->zStart,
+ (int)(pSpan->zEnd -
+ pSpan->zStart));
+ if (field->default_value == NULL) {
+ assert(db->mallocFailed);
+ pParse->rc = SQLITE_NOMEM_BKPT;
+ pParse->nErr++;
+ return;
+ }
}
}
sql_expr_free(db, pSpan->pExpr, false);
--
2.7.4
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