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/**
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* Copyright (c) 2014, Timothy Stack
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* * Neither the name of Timothy Stack nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* @file json-extension-functions.cc
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*/
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#include "config.h"
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#include <string.h>
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#include <string>
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#include "sqlite3.h"
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#include "yajlpp/yajlpp.hh"
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#include "yajlpp/json_op.hh"
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#include "mapbox/variant.hpp"
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#include "vtab_module.hh"
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#include "vtab_module_json.hh"
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#include "yajl/api/yajl_gen.h"
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#include "sqlite-extension-func.hh"
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using namespace std;
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using namespace mapbox;
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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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int sjo_type;
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string sjo_str;
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int sjo_int;
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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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sqlite3_result_value(context, argv[2]);
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}
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else {
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sqlite3_result_null(context);
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}
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}
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struct contains_userdata {
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util::variant<const char *, sqlite3_int64, bool> cu_match_value{false};
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bool cu_result{false};
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};
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static int contains_string(void *ctx, const unsigned char *str, size_t len)
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{
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auto &cu = *((contains_userdata *) ctx);
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if (strncmp((const char *) str, cu.cu_match_value.get<const char *>(), len) == 0) {
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cu.cu_result = true;
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}
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return 1;
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}
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static int contains_integer(void *ctx, long long value)
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{
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auto &cu = *((contains_userdata *) ctx);
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if (cu.cu_match_value.get<sqlite3_int64>() == value) {
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cu.cu_result = true;
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}
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return 1;
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}
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static bool json_contains(const char *json_in, sqlite3_value *value)
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{
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auto_mem<yajl_handle_t> handle(yajl_free);
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yajl_callbacks cb;
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contains_userdata cu;
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memset(&cb, 0, sizeof(cb));
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handle = yajl_alloc(&cb, nullptr, &cu);
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switch (sqlite3_value_type(value)) {
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case SQLITE3_TEXT:
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cb.yajl_string = contains_string;
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cu.cu_match_value = (const char *) sqlite3_value_text(value);
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break;
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case SQLITE_INTEGER:
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cb.yajl_integer = contains_integer;
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cu.cu_match_value = sqlite3_value_int64(value);
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break;
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}
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if (yajl_parse(handle.in(), (const unsigned char *) json_in, strlen(json_in)) != yajl_status_ok ||
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yajl_complete_parse(handle.in()) != yajl_status_ok) {
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throw yajlpp_error(handle.in(), json_in, strlen(json_in));
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}
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return cu.cu_result;
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}
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static int gen_handle_null(void *ctx)
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{
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sql_json_op *sjo = (sql_json_op *)ctx;
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yajl_gen gen = (yajl_gen)sjo->jo_ptr_data;
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if (sjo->jo_ptr.jp_state == json_ptr::MS_DONE) {
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sjo->sjo_type = SQLITE_NULL;
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}
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else {
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sjo->jo_ptr_error_code = yajl_gen_null(gen);
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}
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return sjo->jo_ptr_error_code == yajl_gen_status_ok;
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}
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static int gen_handle_boolean(void *ctx, int boolVal)
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{
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sql_json_op *sjo = (sql_json_op *)ctx;
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yajl_gen gen = (yajl_gen)sjo->jo_ptr_data;
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if (sjo->jo_ptr.jp_state == json_ptr::MS_DONE) {
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sjo->sjo_type = SQLITE_INTEGER;
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sjo->sjo_int = boolVal;
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}
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else {
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sjo->jo_ptr_error_code = yajl_gen_bool(gen, boolVal);
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}
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return sjo->jo_ptr_error_code == yajl_gen_status_ok;
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}
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static int gen_handle_string(void *ctx, const unsigned char * stringVal, size_t len)
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{
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sql_json_op *sjo = (sql_json_op *)ctx;
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yajl_gen gen = (yajl_gen)sjo->jo_ptr_data;
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if (sjo->jo_ptr.jp_state == json_ptr::MS_DONE) {
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sjo->sjo_type = SQLITE3_TEXT;
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sjo->sjo_str = string((char *)stringVal, len);
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}
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else {
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sjo->jo_ptr_error_code = yajl_gen_string(gen, stringVal, len);
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}
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return sjo->jo_ptr_error_code == yajl_gen_status_ok;
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}
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static void sql_jget(sqlite3_context *context,
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int argc, sqlite3_value **argv)
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{
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if (argc < 2) {
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sqlite3_result_error(context, "expecting JSON value and pointer", -1);
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return;
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}
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if (sqlite3_value_type(argv[0]) == SQLITE_NULL) {
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null_or_default(context, argc, argv);
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return;
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}
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const char *json_in = (const char *)sqlite3_value_text(argv[0]);
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if (sqlite3_value_type(argv[1]) == SQLITE_NULL) {
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sqlite3_result_text(context, json_in, -1, SQLITE_TRANSIENT);
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return;
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}
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const char *ptr_in = (const char *)sqlite3_value_text(argv[1]);
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json_ptr jp(ptr_in);
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sql_json_op jo(jp);
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auto_mem<yajl_handle_t> handle(yajl_free);
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const unsigned char *err;
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yajlpp_gen gen;
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yajl_gen_config(gen, yajl_gen_beautify, false);
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jo.jo_ptr_callbacks = json_op::gen_callbacks;
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jo.jo_ptr_callbacks.yajl_null = gen_handle_null;
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jo.jo_ptr_callbacks.yajl_boolean = gen_handle_boolean;
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jo.jo_ptr_callbacks.yajl_string = gen_handle_string;
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jo.jo_ptr_data = gen.get_handle();
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handle.reset(yajl_alloc(&json_op::ptr_callbacks, nullptr, &jo));
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switch (yajl_parse(handle.in(), (const unsigned char *)json_in, strlen(json_in))) {
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case yajl_status_error:
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err = yajl_get_error(handle.in(), 0, (const unsigned char *)json_in, strlen(json_in));
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sqlite3_result_error(context, (const char *)err, -1);
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return;
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case yajl_status_client_canceled:
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if (jo.jo_ptr.jp_state == json_ptr::MS_ERR_INVALID_ESCAPE) {
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sqlite3_result_error(context, jo.jo_ptr.error_msg().c_str(), -1);
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}
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else {
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null_or_default(context, argc, argv);
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}
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return;
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default:
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break;
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}
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switch (yajl_complete_parse(handle.in())) {
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case yajl_status_error:
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err = yajl_get_error(handle.in(), 0, (const unsigned char *)json_in, strlen(json_in));
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sqlite3_result_error(context, (const char *)err, -1);
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return;
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case yajl_status_client_canceled:
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if (jo.jo_ptr.jp_state == json_ptr::MS_ERR_INVALID_ESCAPE) {
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sqlite3_result_error(context, jo.jo_ptr.error_msg().c_str(), -1);
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}
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else {
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null_or_default(context, argc, argv);
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}
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return;
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default:
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break;
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}
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switch (jo.sjo_type) {
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case SQLITE3_TEXT:
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sqlite3_result_text(context, jo.sjo_str.c_str(), jo.sjo_str.size(), SQLITE_TRANSIENT);
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return;
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case SQLITE_NULL:
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sqlite3_result_null(context);
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return;
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case SQLITE_INTEGER:
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sqlite3_result_int(context, jo.sjo_int);
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return;
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}
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string_fragment result = gen.to_string_fragment();
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if (result.empty()) {
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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.data(), result.length(), SQLITE_TRANSIENT);
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}
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struct concat_context {
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concat_context(yajl_gen gen_handle)
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: cc_gen_handle(gen_handle) {
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}
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yajl_gen cc_gen_handle;
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int cc_depth{0};
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};
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static int concat_gen_null(void *ctx)
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{
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auto cc = static_cast<concat_context *>(ctx);
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if (cc->cc_depth > 0) {
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return yajl_gen_null(cc->cc_gen_handle) == yajl_gen_status_ok;
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}
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return 1;
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}
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static int concat_gen_boolean(void *ctx, int val)
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{
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auto cc = static_cast<concat_context *>(ctx);
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return yajl_gen_bool(cc->cc_gen_handle, val) == yajl_gen_status_ok;
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}
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static int concat_gen_number(void *ctx, const char *val, size_t len)
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{
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auto cc = static_cast<concat_context *>(ctx);
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return yajl_gen_number(cc->cc_gen_handle, val, len) == yajl_gen_status_ok;
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}
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static int concat_gen_string(void *ctx, const unsigned char *val, size_t len)
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{
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auto cc = static_cast<concat_context *>(ctx);
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return yajl_gen_string(cc->cc_gen_handle, val, len) == yajl_gen_status_ok;
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}
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static int concat_gen_start_map(void *ctx)
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{
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auto cc = static_cast<concat_context *>(ctx);
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cc->cc_depth += 1;
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return yajl_gen_map_open(cc->cc_gen_handle) == yajl_gen_status_ok;
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}
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static int concat_gen_end_map(void *ctx)
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{
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auto cc = static_cast<concat_context *>(ctx);
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cc->cc_depth -= 1;
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return yajl_gen_map_close(cc->cc_gen_handle) == yajl_gen_status_ok;
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}
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static int concat_gen_map_key(void *ctx, const unsigned char *key, size_t len)
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{
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auto cc = static_cast<concat_context *>(ctx);
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return yajl_gen_string(cc->cc_gen_handle, key, len) == yajl_gen_status_ok;
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}
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static int concat_gen_start_array(void *ctx)
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{
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auto cc = static_cast<concat_context *>(ctx);
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cc->cc_depth += 1;
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if (cc->cc_depth == 1) {
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return 1;
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}
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return yajl_gen_array_open(cc->cc_gen_handle) == yajl_gen_status_ok;
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}
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static int concat_gen_end_array(void *ctx)
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{
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auto cc = static_cast<concat_context *>(ctx);
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cc->cc_depth -= 1;
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if (cc->cc_depth == 0) {
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return 1;
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}
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return yajl_gen_array_close(cc->cc_gen_handle) == yajl_gen_status_ok;
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}
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static void concat_gen_elements(yajl_gen gen, const unsigned char *text, size_t len)
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{
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auto_mem<yajl_handle_t> handle(yajl_free);
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yajl_callbacks callbacks = {nullptr};
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concat_context cc{gen};
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callbacks.yajl_null = concat_gen_null;
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callbacks.yajl_boolean = concat_gen_boolean;
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callbacks.yajl_number = concat_gen_number;
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callbacks.yajl_string = concat_gen_string;
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|
|
callbacks.yajl_start_map = concat_gen_start_map;
|
|
|
|
callbacks.yajl_end_map = concat_gen_end_map;
|
|
|
|
callbacks.yajl_map_key = concat_gen_map_key;
|
|
|
|
callbacks.yajl_start_array = concat_gen_start_array;
|
|
|
|
callbacks.yajl_end_array = concat_gen_end_array;
|
|
|
|
|
|
|
|
handle = yajl_alloc(&callbacks, nullptr, &cc);
|
|
|
|
yajl_config(handle, yajl_allow_comments, 1);
|
|
|
|
if (yajl_parse(handle, (const unsigned char *) text, len) != yajl_status_ok ||
|
|
|
|
yajl_complete_parse(handle) != yajl_status_ok) {
|
|
|
|
unique_ptr<unsigned char, decltype(&free)> err_msg(
|
|
|
|
yajl_get_error(handle, 1, (const unsigned char *) text, len), free);
|
|
|
|
|
|
|
|
throw sqlite_func_error("Invalid JSON: {}", (const char *) err_msg.get());
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static json_string json_concat(nonstd::optional<const char *> json_in, const vector<sqlite3_value *> &values)
|
|
|
|
{
|
|
|
|
yajlpp_gen gen;
|
|
|
|
|
|
|
|
yajl_gen_config(gen, yajl_gen_beautify, false);
|
|
|
|
|
|
|
|
{
|
|
|
|
yajlpp_array array(gen);
|
|
|
|
|
|
|
|
if (json_in) {
|
|
|
|
concat_gen_elements(gen,
|
|
|
|
(const unsigned char *) json_in.value(),
|
|
|
|
strlen(json_in.value()));
|
|
|
|
}
|
|
|
|
|
|
|
|
for (const auto val: values) {
|
|
|
|
switch (sqlite3_value_type(val)) {
|
|
|
|
case SQLITE_NULL:
|
|
|
|
array.gen();
|
|
|
|
break;
|
|
|
|
case SQLITE_INTEGER:
|
|
|
|
array.gen(sqlite3_value_int64(val));
|
|
|
|
break;
|
|
|
|
case SQLITE_FLOAT:
|
|
|
|
array.gen(sqlite3_value_double(val));
|
|
|
|
break;
|
|
|
|
case SQLITE3_TEXT: {
|
|
|
|
auto text_val = sqlite3_value_text(val);
|
|
|
|
|
|
|
|
if (sqlite3_value_subtype(val) == JSON_SUBTYPE) {
|
|
|
|
concat_gen_elements(gen,
|
|
|
|
text_val,
|
|
|
|
strlen((const char *) text_val));
|
|
|
|
} else {
|
|
|
|
array.gen((const char *) text_val);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return json_string(gen);
|
|
|
|
}
|
|
|
|
|
|
|
|
struct json_agg_context {
|
|
|
|
yajl_gen_t *jac_yajl_gen;
|
|
|
|
};
|
|
|
|
|
|
|
|
static void sql_json_group_object_step(sqlite3_context *context,
|
|
|
|
int argc,
|
|
|
|
sqlite3_value **argv)
|
|
|
|
{
|
|
|
|
if ((argc % 2) == 1) {
|
|
|
|
sqlite3_result_error(
|
|
|
|
context,
|
|
|
|
"Uneven number of arguments to json_group_object(), "
|
|
|
|
"expecting key and value pairs",
|
|
|
|
-1);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
json_agg_context *jac = (json_agg_context *) sqlite3_aggregate_context(
|
|
|
|
context, sizeof(json_agg_context));
|
|
|
|
|
|
|
|
|
|
|
|
if (jac->jac_yajl_gen == NULL) {
|
|
|
|
jac->jac_yajl_gen = yajl_gen_alloc(NULL);
|
|
|
|
yajl_gen_config(jac->jac_yajl_gen, yajl_gen_beautify, false);
|
|
|
|
|
|
|
|
yajl_gen_map_open(jac->jac_yajl_gen);
|
|
|
|
}
|
|
|
|
|
|
|
|
for (int lpc = 0; (lpc + 1) < argc; lpc += 2) {
|
|
|
|
if (sqlite3_value_type(argv[lpc]) == SQLITE_NULL) {
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
const unsigned char *key = sqlite3_value_text(argv[lpc]);
|
|
|
|
|
|
|
|
yajl_gen_string(jac->jac_yajl_gen, key, strlen((const char *) key));
|
|
|
|
|
|
|
|
switch (sqlite3_value_type(argv[lpc + 1])) {
|
|
|
|
case SQLITE_NULL:
|
|
|
|
yajl_gen_null(jac->jac_yajl_gen);
|
|
|
|
break;
|
|
|
|
case SQLITE3_TEXT: {
|
|
|
|
const unsigned char *value = sqlite3_value_text(argv[lpc + 1]);
|
|
|
|
#ifdef HAVE_SQLITE3_VALUE_SUBTYPE
|
|
|
|
int subtype = sqlite3_value_subtype(argv[lpc + 1]);
|
|
|
|
|
|
|
|
if (subtype == JSON_SUBTYPE) {
|
|
|
|
yajl_gen_number(jac->jac_yajl_gen,
|
|
|
|
(const char *) value,
|
|
|
|
strlen((const char *)value));
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
#endif
|
|
|
|
yajl_gen_string(jac->jac_yajl_gen,
|
|
|
|
value,
|
|
|
|
strlen((const char *) value));
|
|
|
|
#ifdef HAVE_SQLITE3_VALUE_SUBTYPE
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case SQLITE_INTEGER: {
|
|
|
|
const unsigned char *value = sqlite3_value_text(argv[lpc + 1]);
|
|
|
|
|
|
|
|
yajl_gen_number(jac->jac_yajl_gen,
|
|
|
|
(const char *) value,
|
|
|
|
strlen((const char *) value));
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case SQLITE_FLOAT: {
|
|
|
|
double value = sqlite3_value_double(argv[lpc + 1]);
|
|
|
|
|
|
|
|
yajl_gen_double(jac->jac_yajl_gen, value);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
static void sql_json_group_object_final(sqlite3_context *context)
|
|
|
|
{
|
|
|
|
json_agg_context *jac = (json_agg_context *) sqlite3_aggregate_context(
|
|
|
|
context, 0);
|
|
|
|
|
|
|
|
if (jac == NULL) {
|
|
|
|
sqlite3_result_text(context, "{}", -1, SQLITE_STATIC);
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
const unsigned char *buf;
|
|
|
|
size_t len;
|
|
|
|
|
|
|
|
yajl_gen_map_close(jac->jac_yajl_gen);
|
|
|
|
yajl_gen_get_buf(jac->jac_yajl_gen, &buf, &len);
|
|
|
|
sqlite3_result_text(context, (const char *) buf, len, SQLITE_TRANSIENT);
|
|
|
|
#ifdef HAVE_SQLITE3_VALUE_SUBTYPE
|
|
|
|
sqlite3_result_subtype(context, JSON_SUBTYPE);
|
|
|
|
#endif
|
|
|
|
yajl_gen_free(jac->jac_yajl_gen);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void sql_json_group_array_step(sqlite3_context *context,
|
|
|
|
int argc,
|
|
|
|
sqlite3_value **argv)
|
|
|
|
{
|
|
|
|
json_agg_context *jac = (json_agg_context *) sqlite3_aggregate_context(
|
|
|
|
context, sizeof(json_agg_context));
|
|
|
|
|
|
|
|
if (jac->jac_yajl_gen == NULL) {
|
|
|
|
jac->jac_yajl_gen = yajl_gen_alloc(NULL);
|
|
|
|
yajl_gen_config(jac->jac_yajl_gen, yajl_gen_beautify, false);
|
|
|
|
|
|
|
|
yajl_gen_array_open(jac->jac_yajl_gen);
|
|
|
|
}
|
|
|
|
|
|
|
|
for (int lpc = 0; lpc < argc; lpc++) {
|
|
|
|
switch (sqlite3_value_type(argv[lpc])) {
|
|
|
|
case SQLITE_NULL:
|
|
|
|
yajl_gen_null(jac->jac_yajl_gen);
|
|
|
|
break;
|
|
|
|
case SQLITE3_TEXT: {
|
|
|
|
const unsigned char *value = sqlite3_value_text(argv[lpc]);
|
|
|
|
#ifdef HAVE_SQLITE3_VALUE_SUBTYPE
|
|
|
|
int subtype = sqlite3_value_subtype(argv[lpc]);
|
|
|
|
|
|
|
|
if (subtype == JSON_SUBTYPE) {
|
|
|
|
yajl_gen_number(jac->jac_yajl_gen,
|
|
|
|
(const char *) value,
|
|
|
|
strlen((const char *)value));
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
#endif
|
|
|
|
yajl_gen_string(jac->jac_yajl_gen,
|
|
|
|
value,
|
|
|
|
strlen((const char *) value));
|
|
|
|
#ifdef HAVE_SQLITE3_VALUE_SUBTYPE
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case SQLITE_INTEGER: {
|
|
|
|
const unsigned char *value = sqlite3_value_text(argv[lpc]);
|
|
|
|
|
|
|
|
yajl_gen_number(jac->jac_yajl_gen,
|
|
|
|
(const char *) value,
|
|
|
|
strlen((const char *) value));
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case SQLITE_FLOAT: {
|
|
|
|
double value = sqlite3_value_double(argv[lpc]);
|
|
|
|
|
|
|
|
yajl_gen_double(jac->jac_yajl_gen, value);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
static void sql_json_group_array_final(sqlite3_context *context)
|
|
|
|
{
|
|
|
|
json_agg_context *jac = (json_agg_context *) sqlite3_aggregate_context(
|
|
|
|
context, 0);
|
|
|
|
|
|
|
|
if (jac == NULL) {
|
|
|
|
sqlite3_result_text(context, "{}", -1, SQLITE_STATIC);
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
const unsigned char *buf;
|
|
|
|
size_t len;
|
|
|
|
|
|
|
|
yajl_gen_array_close(jac->jac_yajl_gen);
|
|
|
|
yajl_gen_get_buf(jac->jac_yajl_gen, &buf, &len);
|
|
|
|
sqlite3_result_text(context, (const char *) buf, len, SQLITE_TRANSIENT);
|
|
|
|
#ifdef HAVE_SQLITE3_VALUE_SUBTYPE
|
|
|
|
sqlite3_result_subtype(context, JSON_SUBTYPE);
|
|
|
|
#endif
|
|
|
|
yajl_gen_free(jac->jac_yajl_gen);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
int json_extension_functions(struct FuncDef **basic_funcs,
|
|
|
|
struct FuncDefAgg **agg_funcs)
|
|
|
|
{
|
|
|
|
static struct FuncDef json_funcs[] = {
|
|
|
|
sqlite_func_adapter<decltype(&json_concat), json_concat>::builder(
|
|
|
|
help_text("json_concat",
|
|
|
|
"Returns an array with the given values concatenated onto the end. "
|
|
|
|
"If the initial value is null, the result will be an array with "
|
|
|
|
"the given elements. If the initial value is an array, the result "
|
|
|
|
"will be an array with the given values at the end. If the initial "
|
|
|
|
"value is not null or an array, the result will be an array with "
|
|
|
|
"two elements: the initial value and the given value.")
|
|
|
|
.sql_function()
|
|
|
|
.with_parameter({"json", "The initial JSON value."})
|
|
|
|
.with_parameter(help_text("value", "The value(s) to add to the end of the array.")
|
|
|
|
.one_or_more())
|
|
|
|
.with_tags({"json"})
|
|
|
|
.with_example({
|
|
|
|
"To append the number 4 to null",
|
|
|
|
"SELECT json_concat(NULL, 4)"
|
|
|
|
})
|
|
|
|
.with_example({
|
|
|
|
"To append 4 and 5 to the array [1, 2, 3]",
|
|
|
|
"SELECT json_concat('[1, 2, 3]', 4, 5)"
|
|
|
|
})
|
|
|
|
.with_example({
|
|
|
|
"To concatenate two arrays together",
|
|
|
|
"SELECT json_concat('[1, 2, 3]', json('[4, 5]'))"
|
|
|
|
})
|
|
|
|
),
|
|
|
|
|
|
|
|
sqlite_func_adapter<decltype(&json_contains), json_contains>::builder(
|
|
|
|
help_text("json_contains", "Check if a JSON value contains the given element.")
|
|
|
|
.sql_function()
|
|
|
|
.with_parameter({"json", "The JSON value to query."})
|
|
|
|
.with_parameter({"value", "The value to look for in the first argument"})
|
|
|
|
.with_tags({"json"})
|
|
|
|
.with_example({
|
|
|
|
"To test if a JSON array contains the number 4",
|
|
|
|
"SELECT json_contains('[1, 2, 3]', 4)"
|
|
|
|
})
|
|
|
|
.with_example({
|
|
|
|
"To test if a JSON array contains the string 'def'",
|
|
|
|
"SELECT json_contains('[\"abc\", \"def\"]', 'def')"
|
|
|
|
})
|
|
|
|
),
|
|
|
|
|
|
|
|
{
|
|
|
|
"jget", -1, SQLITE_UTF8, 0, sql_jget,
|
|
|
|
help_text("jget",
|
|
|
|
"Get the value from a JSON object using a JSON-Pointer.")
|
|
|
|
.sql_function()
|
|
|
|
.with_parameter({"json", "The JSON object to query."})
|
|
|
|
.with_parameter({"ptr", "The JSON-Pointer to lookup in the object."})
|
|
|
|
.with_parameter(help_text("default", "The default value if the value was not found")
|
|
|
|
.optional())
|
|
|
|
.with_tags({"json"})
|
|
|
|
.with_example({
|
|
|
|
"To get the root of a JSON value",
|
|
|
|
"SELECT jget('1', '')"
|
|
|
|
})
|
|
|
|
.with_example({
|
|
|
|
"To get the property named 'b' in a JSON object",
|
|
|
|
"SELECT jget('{ \"a\": 1, \"b\": 2 }', '/b')"
|
|
|
|
})
|
|
|
|
.with_example({
|
|
|
|
"To get the 'msg' property and return a default if it does not exist",
|
|
|
|
"SELECT jget(null, '/msg', 'Hello')"
|
|
|
|
})
|
|
|
|
},
|
|
|
|
|
|
|
|
{ nullptr }
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct FuncDefAgg json_agg_funcs[] = {
|
|
|
|
{ "json_group_object", -1, 0,
|
|
|
|
sql_json_group_object_step, sql_json_group_object_final,
|
|
|
|
help_text("json_group_object")
|
|
|
|
.sql_function()
|
|
|
|
.with_summary("Collect the given values from a query into a JSON object")
|
|
|
|
.with_parameter(help_text("name", "The property name for the value"))
|
|
|
|
.with_parameter(help_text("value", "The value to add to the object")
|
|
|
|
.one_or_more())
|
|
|
|
.with_tags({"json"})
|
|
|
|
.with_example({
|
|
|
|
"To create an object from arguments",
|
|
|
|
"SELECT json_group_object('a', 1, 'b', 2)"
|
|
|
|
})
|
|
|
|
.with_example({
|
|
|
|
"To create an object from a pair of columns",
|
|
|
|
"SELECT json_group_object(column1, column2) FROM (VALUES ('a', 1), ('b', 2))"
|
|
|
|
})},
|
|
|
|
{ "json_group_array", -1, 0,
|
|
|
|
sql_json_group_array_step, sql_json_group_array_final,
|
|
|
|
help_text("json_group_array")
|
|
|
|
.sql_function()
|
|
|
|
.with_summary("Collect the given values from a query into a JSON array")
|
|
|
|
.with_parameter(help_text("value", "The values to append to the array")
|
|
|
|
.one_or_more())
|
|
|
|
.with_tags({"json"})
|
|
|
|
.with_example({
|
|
|
|
"To create an array from arguments",
|
|
|
|
"SELECT json_group_array('one', 2, 3.4)"
|
|
|
|
})
|
|
|
|
.with_example({
|
|
|
|
"To create an array from a column of values",
|
|
|
|
"SELECT json_group_array(column1) FROM (VALUES (1), (2), (3))"
|
|
|
|
})},
|
|
|
|
|
|
|
|
{ nullptr }
|
|
|
|
};
|
|
|
|
|
|
|
|
*basic_funcs = json_funcs;
|
|
|
|
*agg_funcs = json_agg_funcs;
|
|
|
|
|
|
|
|
return SQLITE_OK;
|
|
|
|
}
|