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@ -42,10 +42,13 @@
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#include "json_op.hh"
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#include "yajl/api/yajl_gen.h"
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#include "sqlite-extension-func.h"
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using namespace std;
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#define JSON_SUBTYPE 74 /* Ascii for "J" */
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class sql_json_op : public json_op {
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public:
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sql_json_op(json_ptr &ptr) : json_op(ptr), sjo_type(-1), sjo_int(0) { };
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@ -55,13 +58,6 @@ public:
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int sjo_int;
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};
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static void printer(void *ctx, const char *numberVal, size_t numberLen)
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{
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string &str = *(string *)ctx;
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str.append(numberVal, numberLen);
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}
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static void null_or_default(sqlite3_context *context, int argc, sqlite3_value **argv)
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{
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if (argc > 2) {
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@ -145,10 +141,8 @@ static void sql_jget(sqlite3_context *context,
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auto_mem<yajl_gen_t> gen(yajl_gen_free);
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auto_mem<yajl_handle_t> handle(yajl_free);
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const unsigned char *err;
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string result;
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gen = yajl_gen_alloc(NULL);
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yajl_gen_config(gen.in(), yajl_gen_print_callback, printer, &result);
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yajl_gen_config(gen.in(), yajl_gen_beautify, false);
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jo.jo_ptr_callbacks = json_op::gen_callbacks;
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@ -204,12 +198,17 @@ static void sql_jget(sqlite3_context *context,
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return;
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}
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if (result.empty()) {
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const unsigned char *buf;
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size_t len;
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yajl_gen_get_buf(gen, &buf, &len);
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if (len == 0) {
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null_or_default(context, argc, argv);
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return;
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}
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sqlite3_result_text(context, result.c_str(), result.size(), SQLITE_TRANSIENT);
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sqlite3_result_text(context, (const char *) buf, len, SQLITE_TRANSIENT);
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}
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struct json_agg_context {
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@ -255,10 +254,22 @@ static void sql_json_group_object_step(sqlite3_context *context,
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break;
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case SQLITE3_TEXT: {
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const unsigned char *value = sqlite3_value_text(argv[lpc + 1]);
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yajl_gen_string(jac->jac_yajl_gen,
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value,
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strlen((const char *) value));
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#ifdef HAVE_SQLITE3_VALUE_SUBTYPE
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int subtype = sqlite3_value_subtype(argv[lpc + 1]);
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if (subtype == JSON_SUBTYPE) {
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yajl_gen_number(jac->jac_yajl_gen,
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(const char *) value,
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strlen((const char *)value));
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}
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else {
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#endif
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yajl_gen_string(jac->jac_yajl_gen,
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value,
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strlen((const char *) value));
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#ifdef HAVE_SQLITE3_VALUE_SUBTYPE
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}
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#endif
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break;
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}
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case SQLITE_INTEGER: {
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@ -295,6 +306,89 @@ static void sql_json_group_object_final(sqlite3_context *context)
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yajl_gen_map_close(jac->jac_yajl_gen);
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yajl_gen_get_buf(jac->jac_yajl_gen, &buf, &len);
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sqlite3_result_text(context, (const char *) buf, len, SQLITE_TRANSIENT);
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#ifdef HAVE_SQLITE3_VALUE_SUBTYPE
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sqlite3_result_subtype(context, JSON_SUBTYPE);
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#endif
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yajl_gen_free(jac->jac_yajl_gen);
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}
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}
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static void sql_json_group_array_step(sqlite3_context *context,
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int argc,
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sqlite3_value **argv)
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{
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json_agg_context *jac = (json_agg_context *) sqlite3_aggregate_context(
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context, sizeof(json_agg_context));
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if (jac->jac_yajl_gen == NULL) {
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jac->jac_yajl_gen = yajl_gen_alloc(NULL);
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yajl_gen_config(jac->jac_yajl_gen, yajl_gen_beautify, false);
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yajl_gen_array_open(jac->jac_yajl_gen);
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}
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for (int lpc = 0; lpc < argc; lpc++) {
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switch (sqlite3_value_type(argv[lpc])) {
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case SQLITE_NULL:
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yajl_gen_null(jac->jac_yajl_gen);
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break;
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case SQLITE3_TEXT: {
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const unsigned char *value = sqlite3_value_text(argv[lpc]);
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#ifdef HAVE_SQLITE3_VALUE_SUBTYPE
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int subtype = sqlite3_value_subtype(argv[lpc]);
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if (subtype == JSON_SUBTYPE) {
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yajl_gen_number(jac->jac_yajl_gen,
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(const char *) value,
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strlen((const char *)value));
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}
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else {
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#endif
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yajl_gen_string(jac->jac_yajl_gen,
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value,
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strlen((const char *) value));
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#ifdef HAVE_SQLITE3_VALUE_SUBTYPE
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}
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#endif
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break;
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}
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case SQLITE_INTEGER: {
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const unsigned char *value = sqlite3_value_text(argv[lpc]);
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yajl_gen_number(jac->jac_yajl_gen,
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(const char *) value,
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strlen((const char *) value));
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break;
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}
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case SQLITE_FLOAT: {
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double value = sqlite3_value_double(argv[lpc]);
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yajl_gen_double(jac->jac_yajl_gen, value);
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break;
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}
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}
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}
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}
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static void sql_json_group_array_final(sqlite3_context *context)
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{
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json_agg_context *jac = (json_agg_context *) sqlite3_aggregate_context(
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context, 0);
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if (jac == NULL) {
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sqlite3_result_text(context, "{}", -1, SQLITE_STATIC);
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}
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else {
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const unsigned char *buf;
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size_t len;
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yajl_gen_array_close(jac->jac_yajl_gen);
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yajl_gen_get_buf(jac->jac_yajl_gen, &buf, &len);
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sqlite3_result_text(context, (const char *) buf, len, SQLITE_TRANSIENT);
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#ifdef HAVE_SQLITE3_VALUE_SUBTYPE
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sqlite3_result_subtype(context, JSON_SUBTYPE);
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#endif
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yajl_gen_free(jac->jac_yajl_gen);
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}
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}
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@ -311,6 +405,8 @@ int json_extension_functions(const struct FuncDef **basic_funcs,
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static const struct FuncDefAgg json_agg_funcs[] = {
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{ "json_group_object", -1, 0, 0,
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sql_json_group_object_step, sql_json_group_object_final, },
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{ "json_group_array", -1, 0, 0,
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sql_json_group_array_step, sql_json_group_array_final, },
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{ NULL }
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};
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