libsql/sqlite/sqlite-query.c at develop · bbcarchdev/libsql · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
/* Author: Mo McRoberts <mo.mcroberts@bbc.co.uk>
 *
 * Copyright 2014-2017 BBC.
 */

/*
 * Copyright 2012-2013 Mo McRoberts.
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include "p_sqlite.h"

int
sql_sqlite_execute_(SQL *restrict me, const char *restrict statement, void *restrict *restrict resultdata)
{
	int r;
	sqlite3_stmt *stmt;

	if(me->depth && me->deadlocked)
	{
		/* If we're already deadlocked mid-transaction, there's no point in
		 * doing anything
		 */
		return -1;
	}
	me->deadlocked = 0;
	if(me->querylog)
	{
		me->querylog(me, statement);
	}
	stmt = NULL;
	r = sqlite3_prepare_v2(me->sqlite, statement, strlen(statement), &stmt, NULL);
	if(r != SQLITE_OK)
	{
		sql_sqlite_copy_error_(me);
		return -1;
	}
	if(resultdata)
	{
		*resultdata = stmt;
	}
	else
	{
		r = sqlite3_step(stmt);
		sqlite3_finalize(stmt);
		if(r != SQLITE_DONE && r != SQLITE_ROW)
		{
			return -1;
		}
	}
	return 0;
}

int
sql_sqlite_begin_(SQL *me, SQL_TXN_MODE mode)
{
	const char *st;

	(void) mode;

	if(me->depth)
	{
		/* Can't nest transactions */
		sql_sqlite_set_error_(me, "25000", "You are not allowed to execute this command in a transaction");
		return -1;
	}
	st = "BEGIN TRANSACTION";
	if(me->querylog)
	{
		me->querylog(me, st);
	}
	if(sqlite3_exec(me->sqlite, st, NULL, NULL, NULL) != SQLITE_OK)
	{
		sql_sqlite_copy_error_(me);
		return -1;
	}
	me->depth++;
	return 0;
}

int
sql_sqlite_commit_(SQL *me)
{
	const char *st = "COMMIT";

	if(!me->depth)
	{
		return 0;
	}
	if(me->deadlocked)
	{
		return -1;
	}
	if(me->querylog)
	{
		me->querylog(me, st);
	}
	if(sqlite3_exec(me->sqlite, st, NULL, NULL, NULL) != SQLITE_OK)
	{
		sql_sqlite_copy_error_(me);
		return -1;
	}
	me->depth--;
	return 0;
}

int
sql_sqlite_rollback_(SQL *me)
{
	const char *st = "ROLLBACK";

	if(!me->depth)
	{
		return 0;
	}
	if(me->querylog)
	{
		me->querylog(me, st);
	}
	if(sqlite3_exec(me->sqlite, st, NULL, NULL, NULL) != SQLITE_OK)
	{
		sql_sqlite_copy_error_(me);
		if(me->deadlocked)
		{
			/* It doesn't matter if the rollback failed */
			me->depth--;
			me->deadlocked = 0;
			return 0;
		}
		return -1;
	}
	me->depth--;
	return 0;
}

int
sql_sqlite_deadlocked_(SQL *me)
{
	return me->deadlocked;
}