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Overview
| Comment: | Add the json_group_array() and json_group_object() aggregate functions to the JSON1 extension. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
7f386a9332237100a345035ca213327e |
| User & Date: | drh 2015-12-30 01:07:02 |
Context
|
2015-12-30
| ||
| 14:06 | Remove unnecessary tests from the LIKE pattern matcher. Slightly faster and slightly smaller, and it should also now works with EBCDIC. (check-in: 0a99a8c4 user: drh tags: trunk) | |
| 13:36 | Enhance the command-line shell to handle MBCS characters on input and output. (Closed-Leaf check-in: a0a08b8c user: drh tags: mbcs-shell) | |
| 01:07 | Add the json_group_array() and json_group_object() aggregate functions to the JSON1 extension. (check-in: 7f386a93 user: drh tags: trunk) | |
|
2015-12-24
| ||
| 14:53 | Avoid a harmless compiler warning on systems where the byteorder cannot be determined at compile-time. (check-in: 7c7b7f26 user: drh tags: trunk) | |
Changes
Changes to ext/misc/json1.c.
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){
UNUSED_PARAM(argc);
sqlite3_result_int(ctx, sqlite3_value_subtype(argv[0])==JSON_SUBTYPE);
}
#endif /* SQLITE_DEBUG */
/****************************************************************************
** SQL function implementations
****************************************************************************/
/*
** Implementation of the json_array(VALUE,...) function. Return a JSON
** array that contains all values given in arguments. Or if any argument
** is a BLOB, throw an error.
*/
................................................................................
UNUSED_PARAM(argc);
if( jsonParse(&x, 0, (const char*)sqlite3_value_text(argv[0]))==0 ){
rc = 1;
}
jsonParseReset(&x);
sqlite3_result_int(ctx, rc);
}
#ifndef SQLITE_OMIT_VIRTUALTABLE
/****************************************************************************
** The json_each virtual table
****************************************************************************/
typedef struct JsonEachCursor JsonEachCursor;
struct JsonEachCursor {
................................................................................
#if SQLITE_DEBUG
/* DEBUG and TESTING functions */
{ "json_parse", 1, 0, jsonParseFunc },
{ "json_test1", 1, 0, jsonTest1Func },
#endif
};
#ifndef SQLITE_OMIT_VIRTUALTABLE
static const struct {
const char *zName;
sqlite3_module *pModule;
} aMod[] = {
{ "json_each", &jsonEachModule },
{ "json_tree", &jsonTreeModule },
................................................................................
#endif
for(i=0; i<sizeof(aFunc)/sizeof(aFunc[0]) && rc==SQLITE_OK; i++){
rc = sqlite3_create_function(db, aFunc[i].zName, aFunc[i].nArg,
SQLITE_UTF8 | SQLITE_DETERMINISTIC,
(void*)&aFunc[i].flag,
aFunc[i].xFunc, 0, 0);
}
#ifndef SQLITE_OMIT_VIRTUALTABLE
for(i=0; i<sizeof(aMod)/sizeof(aMod[0]) && rc==SQLITE_OK; i++){
rc = sqlite3_create_module(db, aMod[i].zName, aMod[i].pModule, 0);
}
#endif
return rc;
}
|
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){
UNUSED_PARAM(argc);
sqlite3_result_int(ctx, sqlite3_value_subtype(argv[0])==JSON_SUBTYPE);
}
#endif /* SQLITE_DEBUG */
/****************************************************************************
** Scalar SQL function implementations
****************************************************************************/
/*
** Implementation of the json_array(VALUE,...) function. Return a JSON
** array that contains all values given in arguments. Or if any argument
** is a BLOB, throw an error.
*/
................................................................................
UNUSED_PARAM(argc);
if( jsonParse(&x, 0, (const char*)sqlite3_value_text(argv[0]))==0 ){
rc = 1;
}
jsonParseReset(&x);
sqlite3_result_int(ctx, rc);
}
/****************************************************************************
** Aggregate SQL function implementations
****************************************************************************/
/*
** json_group_array(VALUE)
**
** Return a JSON array composed of all values in the aggregate.
*/
static void jsonArrayStep(
sqlite3_context *ctx,
int argc,
sqlite3_value **argv
){
JsonString *pStr;
pStr = (JsonString*)sqlite3_aggregate_context(ctx, sizeof(*pStr));
if( pStr ){
if( pStr->zBuf==0 ){
jsonInit(pStr, ctx);
jsonAppendChar(pStr, '[');
}else{
jsonAppendChar(pStr, ',');
pStr->pCtx = ctx;
}
jsonAppendValue(pStr, argv[0]);
}
}
static void jsonArrayFinal(sqlite3_context *ctx){
JsonString *pStr;
pStr = (JsonString*)sqlite3_aggregate_context(ctx, 0);
if( pStr ){
pStr->pCtx = ctx;
jsonAppendChar(pStr, ']');
if( pStr->bErr ){
sqlite3_result_error_nomem(ctx);
if( !pStr->bStatic ) sqlite3_free(pStr->zBuf);
}else{
sqlite3_result_text(ctx, pStr->zBuf, pStr->nUsed,
pStr->bStatic ? SQLITE_TRANSIENT : sqlite3_free);
pStr->bStatic = 1;
}
}else{
sqlite3_result_text(ctx, "[]", 2, SQLITE_STATIC);
}
sqlite3_result_subtype(ctx, JSON_SUBTYPE);
}
/*
** json_group_obj(NAME,VALUE)
**
** Return a JSON object composed of all names and values in the aggregate.
*/
static void jsonObjectStep(
sqlite3_context *ctx,
int argc,
sqlite3_value **argv
){
JsonString *pStr;
const char *z;
u32 n;
pStr = (JsonString*)sqlite3_aggregate_context(ctx, sizeof(*pStr));
if( pStr ){
if( pStr->zBuf==0 ){
jsonInit(pStr, ctx);
jsonAppendChar(pStr, '{');
}else{
jsonAppendChar(pStr, ',');
pStr->pCtx = ctx;
}
z = (const char*)sqlite3_value_text(argv[0]);
n = (u32)sqlite3_value_bytes(argv[0]);
jsonAppendString(pStr, z, n);
jsonAppendChar(pStr, ':');
jsonAppendValue(pStr, argv[1]);
}
}
static void jsonObjectFinal(sqlite3_context *ctx){
JsonString *pStr;
pStr = (JsonString*)sqlite3_aggregate_context(ctx, 0);
if( pStr ){
jsonAppendChar(pStr, '}');
if( pStr->bErr ){
sqlite3_result_error_nomem(ctx);
if( !pStr->bStatic ) sqlite3_free(pStr->zBuf);
}else{
sqlite3_result_text(ctx, pStr->zBuf, pStr->nUsed,
pStr->bStatic ? SQLITE_TRANSIENT : sqlite3_free);
pStr->bStatic = 1;
}
}else{
sqlite3_result_text(ctx, "{}", 2, SQLITE_STATIC);
}
sqlite3_result_subtype(ctx, JSON_SUBTYPE);
}
#ifndef SQLITE_OMIT_VIRTUALTABLE
/****************************************************************************
** The json_each virtual table
****************************************************************************/
typedef struct JsonEachCursor JsonEachCursor;
struct JsonEachCursor {
................................................................................
#if SQLITE_DEBUG
/* DEBUG and TESTING functions */
{ "json_parse", 1, 0, jsonParseFunc },
{ "json_test1", 1, 0, jsonTest1Func },
#endif
};
static const struct {
const char *zName;
int nArg;
void (*xStep)(sqlite3_context*,int,sqlite3_value**);
void (*xFinal)(sqlite3_context*);
} aAgg[] = {
{ "json_group_array", 1, jsonArrayStep, jsonArrayFinal },
{ "json_group_object", 2, jsonObjectStep, jsonObjectFinal },
};
#ifndef SQLITE_OMIT_VIRTUALTABLE
static const struct {
const char *zName;
sqlite3_module *pModule;
} aMod[] = {
{ "json_each", &jsonEachModule },
{ "json_tree", &jsonTreeModule },
................................................................................
#endif
for(i=0; i<sizeof(aFunc)/sizeof(aFunc[0]) && rc==SQLITE_OK; i++){
rc = sqlite3_create_function(db, aFunc[i].zName, aFunc[i].nArg,
SQLITE_UTF8 | SQLITE_DETERMINISTIC,
(void*)&aFunc[i].flag,
aFunc[i].xFunc, 0, 0);
}
for(i=0; i<sizeof(aAgg)/sizeof(aAgg[0]) && rc==SQLITE_OK; i++){
rc = sqlite3_create_function(db, aAgg[i].zName, aAgg[i].nArg,
SQLITE_UTF8 | SQLITE_DETERMINISTIC, 0,
0, aAgg[i].xStep, aAgg[i].xFinal);
}
#ifndef SQLITE_OMIT_VIRTUALTABLE
for(i=0; i<sizeof(aMod)/sizeof(aMod[0]) && rc==SQLITE_OK; i++){
rc = sqlite3_create_module(db, aMod[i].zName, aMod[i].pModule, 0);
}
#endif
return rc;
}
|
Added test/json103.test.
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# 2015-12-30 # # The author disclaims copyright to this source code. In place of # a legal notice, here is a blessing: # # May you do good and not evil. # May you find forgiveness for yourself and forgive others. # May you share freely, never taking more than you give. # #*********************************************************************** # This file implements tests for JSON aggregate SQL functions # set testdir [file dirname $argv0] source $testdir/tester.tcl ifcapable !json1 { finish_test return } do_execsql_test json103-100 { CREATE TABLE t1(a,b,c); WITH RECURSIVE c(x) AS (VALUES(1) UNION SELECT x+1 FROM c WHERE x<100) INSERT INTO t1(a,b,c) SELECT x, x%3, printf('n%d',x) FROM c; UPDATE t1 SET a='orange' WHERE rowid=39; UPDATE t1 SET a=32.5 WHERE rowid=31; UPDATE t1 SET a=x'303132' WHERE rowid=29; UPDATE t1 SET a=NULL WHERE rowid=37; SELECT json_group_array(a) FROM t1 WHERE a<0 AND typeof(a)!='blob'; } {{[]}} do_catchsql_test json103-101 { SELECT json_group_array(a) FROM t1; } {1 {JSON cannot hold BLOB values}} do_execsql_test json103-110 { SELECT json_group_array(a) FROM t1 WHERE rowid BETWEEN 31 AND 39; } {{[32.5,32,33,34,35,36,null,38,"orange"]}} do_execsql_test json103-111 { SELECT json_array_length(json_group_array(a)) FROM t1 WHERE rowid BETWEEN 31 AND 39; } {9} do_execsql_test json103-120 { SELECT b, json_group_array(a) FROM t1 WHERE rowid<10 GROUP BY b ORDER BY b; } {0 {[3,6,9]} 1 {[1,4,7]} 2 {[2,5,8]}} do_execsql_test json103-200 { SELECT json_group_object(c,a) FROM t1 WHERE a<0 AND typeof(a)!='blob'; } {{{}}} do_catchsql_test json103-201 { SELECT json_group_object(c,a) FROM t1; } {1 {JSON cannot hold BLOB values}} do_execsql_test json103-210 { SELECT json_group_object(c,a) FROM t1 WHERE rowid BETWEEN 31 AND 39 AND rowid%2==1; } {{{"n31":32.5,"n33":33,"n35":35,"n37":null,"n39":"orange"}}} do_execsql_test json103-220 { SELECT b, json_group_object(c,a) FROM t1 WHERE rowid<7 GROUP BY b ORDER BY b; } {0 {{"n3":3,"n6":6}} 1 {{"n1":1,"n4":4}} 2 {{"n2":2,"n5":5}}} finish_test |