--- /dev/null
+/*
+ * jsonb_opx.c
+ * Test jsonb delete and concatenate operator functions for 9.4
+ *
+ * Portions Copyright (c) 1996-2015, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ * Author: Glyn Astill <glyn@8kb.co.uk>
+ *
+ * This is purely experimentation and will contain many errors and bad form
+ * DO NOT USE ON PRODUCTION SYSTEMS.
+ *
+ */
+
+#include "postgres.h"
+#include "fmgr.h"
+#include "utils/array.h"
+#include "utils/jsonb.h"
+#include "catalog/pg_type.h"
+#include "utils/builtins.h"
+#include "jsonb_opx.h"
+
+#ifdef PG_MODULE_MAGIC
+ PG_MODULE_MAGIC;
+#endif
+
+Datum jsonb_delete_key(PG_FUNCTION_ARGS);
+
+PG_FUNCTION_INFO_V1(jsonb_delete_key);
+
+/*
+ * Operator function to delete key from left operand where a match is found in
+ * the right operand.
+ *
+ * jsonb, text -> jsonb
+ *
+ */
+Datum
+jsonb_delete_key(PG_FUNCTION_ARGS)
+{
+ /* pointers to incoming jsonb and text data */
+ Jsonb *input_jsonb = PG_GETARG_JSONB(0);
+ text *input_text = PG_GETARG_TEXT_P(1);
+
+ /* pointers to return jsonb value data and state to be converted to jsonb on return */
+ JsonbParseState *state = NULL;
+ JsonbValue *return_jsonb_value = NULL;
+
+ /* pointer to iterator for input_jsonb and lookup value data */
+ JsonbValue jsonb_lookup_key;
+ JsonbValue *jsonb_lookup_value = NULL;
+ JsonbIterator *jsonb_iterator;
+ JsonbValue jsonb_iterator_value;
+ int32 jsonb_iterator_token;
+
+ /* variables used for skip logic */
+ int32 skip_key = 0;
+ int32 nest_level = 0;
+ int32 array_level = 0;
+
+ /*
+ * if we are not deaing with an array first check to make sure the key exists
+ * this is potentially just extra unwanted work
+ */
+ if (!JB_ROOT_IS_ARRAY(input_jsonb))
+ {
+ jsonb_lookup_key.type = jbvString;
+ jsonb_lookup_key.val.string.val = VARDATA_ANY(input_text);
+ jsonb_lookup_key.val.string.len = VARSIZE_ANY_EXHDR(input_text);
+
+ jsonb_lookup_value = findJsonbValueFromContainer(&input_jsonb->root,
+ JB_FOBJECT | JB_FARRAY, &jsonb_lookup_key);
+
+ if (jsonb_lookup_value == NULL)
+ PG_RETURN_JSONB(input_jsonb);
+ }
+
+ /*
+ * If we've been supplied with an existing key iterate round json data and rebuild
+ * with key/element excluded.
+ *
+ * skip_key, nest_level and array_level are crude counts to check if the the value
+ * for the key is closed and ensure we don't match on keys within nested objects.
+ * Because we are recursing into nested elements but blindly just pushing them onto
+ * the return value we can get away without deeper knowledge of the json?
+ */
+
+ jsonb_iterator = JsonbIteratorInit(&input_jsonb->root);
+
+ while ((jsonb_iterator_token = JsonbIteratorNext(&jsonb_iterator, &jsonb_iterator_value, false)) != WJB_DONE)
+ {
+ switch (jsonb_iterator_token)
+ {
+ case WJB_BEGIN_ARRAY:
+ array_level++;
+ if (skip_key == 0)
+ return_jsonb_value = pushJsonbValue(&state, WJB_BEGIN_ARRAY, NULL);
+ break;
+ case WJB_BEGIN_OBJECT:
+ nest_level++;
+ if (skip_key == 0)
+ return_jsonb_value = pushJsonbValue(&state, WJB_BEGIN_OBJECT, NULL);
+ break;
+ case WJB_ELEM:
+ /* only match array elements if they are text */
+ if (skip_key == 0 && nest_level == 0 && array_level > 0)
+ {
+ if (jsonb_iterator_value.type == jbvString)
+ {
+ if ((jsonb_iterator_value.val.string.len == VARSIZE_ANY_EXHDR(input_text)) &&
+ (memcmp(jsonb_iterator_value.val.string.val,
+ VARDATA_ANY(input_text),
+ jsonb_iterator_value.val.string.len) == 0))
+ break;
+ }
+ }
+ if (skip_key == 0)
+ return_jsonb_value = pushJsonbValue(&state, WJB_ELEM, &jsonb_iterator_value);
+ break;
+ case WJB_KEY:
+ /* Check each key against our array of keys */
+ if (skip_key > 0)
+ {
+ skip_key++;
+ }
+ else if (nest_level == 1 && array_level == 0)
+ {
+ if ((jsonb_iterator_value.val.string.len == VARSIZE_ANY_EXHDR(input_text)) &&
+ (memcmp(jsonb_iterator_value.val.string.val,
+ VARDATA_ANY(input_text),
+ jsonb_iterator_value.val.string.len) == 0))
+ {
+ skip_key++;
+ break;
+ }
+ }
+ if (skip_key == 0)
+ return_jsonb_value = pushJsonbValue(&state, WJB_KEY, &jsonb_iterator_value);
+ break;
+ case WJB_VALUE:
+ if (skip_key == 0)
+ return_jsonb_value = pushJsonbValue(&state, WJB_VALUE, &jsonb_iterator_value);
+ else if (skip_key > 0)
+ skip_key--;
+ break;
+ case WJB_END_ARRAY:
+ array_level--;
+ if (skip_key == 0)
+ return_jsonb_value = pushJsonbValue(&state, WJB_END_ARRAY, NULL);
+ else if (skip_key > 0 && array_level == 0)
+ skip_key--;
+ break;
+ case WJB_END_OBJECT:
+ nest_level--;
+ if (skip_key == 0)
+ return_jsonb_value = pushJsonbValue(&state, WJB_END_OBJECT, NULL);
+ else if (skip_key > 0)
+ skip_key--;
+ break;
+ default:
+ elog(ERROR, "invalid JsonbIteratorNext rc: %d", jsonb_iterator_token);
+ }
+ }
+ PG_FREE_IF_COPY(input_jsonb, 0);
+ PG_FREE_IF_COPY(input_text, 1);
+
+ PG_RETURN_JSONB(JsonbValueToJsonb(return_jsonb_value));
+}
+
+Datum jsonb_delete_keys(PG_FUNCTION_ARGS);
+
+PG_FUNCTION_INFO_V1(jsonb_delete_keys);
+
+/*
+ * Operator function to delete keys from left operand where a match is found in
+ * the right operand.
+ *
+ * jsonb, text[] -> jsonb
+ *
+ */
+Datum
+jsonb_delete_keys(PG_FUNCTION_ARGS)
+{
+ /* general loops */
+ int i;
+
+ /* pointers to incoming jsonb and text[] data */
+ Jsonb *input_jsonb = PG_GETARG_JSONB(0);
+ ArrayType *input_array = PG_GETARG_ARRAYTYPE_P(1);
+
+ /* pointers to return jsonb value data and state to be converted to jsonb on return */
+ JsonbParseState *state = NULL;
+ JsonbValue *return_jsonb_value = NULL;
+
+ /* pointer to iterator for input_jsonb and lookup value data */
+ JsonbIterator *jsonb_iterator;
+ JsonbValue jsonb_iterator_value;
+ int32 jsonb_iterator_token;
+
+ /* variables used for skip logic */
+ int32 skip_key = 0;
+ int32 nest_level = 0;
+ int32 array_level = 0;
+
+ /* array element variables for use during deconstruction */
+ Datum *datums;
+ bool *nulls;
+ int32 count;
+
+ /* individual array values values from incoming text[] */
+ text *array_element_text;
+
+ /* assert input_array is a text array type */
+ Assert(ARR_ELEMTYPE(input_array) == TEXTOID);
+
+ /* check input_array is one-dimensional */
+ if (ARR_NDIM(input_array) > 1)
+ ereport(ERROR,
+ (errcode(ERRCODE_ARRAY_SUBSCRIPT_ERROR),
+ errmsg("1 dimensional text array expected")));
+
+ /* deconstruct array elements */
+ deconstruct_array(input_array, TEXTOID, -1, false, 'i',
+ &datums, &nulls, &count);
+
+ /* if the array is empty there's no work to do so return the input value */
+ if (count == 0)
+ PG_RETURN_JSONB(input_jsonb);
+
+ /*
+ * If we've been supplied with existing keys iterate round json data and rebuild
+ * with keys/elements excluded.
+ *
+ * skip_key, nest_level and array_level are crude counts to check if the the value
+ * for the key is closed and ensure we don't match on keys within nested objects.
+ * Because we are recursing into nested elements but blindly just pushing them onto
+ * the return value we can get away without deeper knowledge of the json?
+ */
+ jsonb_iterator = JsonbIteratorInit(&input_jsonb->root);
+
+ while ((jsonb_iterator_token = JsonbIteratorNext(&jsonb_iterator, &jsonb_iterator_value, false)) != WJB_DONE) {
+
+ switch (jsonb_iterator_token)
+ {
+ case WJB_BEGIN_ARRAY:
+ array_level++;
+ if (skip_key == 0)
+ return_jsonb_value = pushJsonbValue(&state, WJB_BEGIN_ARRAY, NULL);
+ break;
+ case WJB_BEGIN_OBJECT:
+ nest_level++;
+ if (skip_key == 0)
+ return_jsonb_value = pushJsonbValue(&state, WJB_BEGIN_OBJECT, NULL);
+ break;
+ case WJB_ELEM:
+ /* only match array elements if they are text or null */
+ if (skip_key == 0 && nest_level == 0 && array_level > 0)
+ {
+ if (jsonb_iterator_value.type == jbvString || jsonb_iterator_value.type == jbvNull)
+ {
+ for (i=0; i<count; i++)
+ {
+ if (!nulls[i])
+ array_element_text = DatumGetTextP(datums[i]);
+ else
+ array_element_text = NULL;
+
+ if (((array_element_text != NULL) && (jsonb_iterator_value.val.string.len == VARSIZE_ANY_EXHDR(array_element_text)) &&
+ (memcmp(jsonb_iterator_value.val.string.val,
+ VARDATA_ANY(array_element_text),
+ jsonb_iterator_value.val.string.len) == 0)) || ((array_element_text == NULL) && (jsonb_iterator_value.type == jbvNull)))
+ {
+ skip_key = 1;
+ break;
+ }
+ }
+ if (skip_key == 1)
+ {
+ skip_key = 0;
+ break;
+ }
+ }
+ }
+ if (skip_key == 0)
+ return_jsonb_value = pushJsonbValue(&state, WJB_ELEM, &jsonb_iterator_value);
+ break;
+ case WJB_KEY:
+ /* Check each key against our array of keys */
+ if (skip_key > 0)
+ {
+ skip_key++;
+ }
+ else if (nest_level == 1 && array_level == 0)
+ {
+ for (i=0; i<count; i++)
+ {
+ if (nulls[i])
+ continue;
+
+ array_element_text = DatumGetTextP(datums[i]);
+
+ if ((jsonb_iterator_value.val.string.len == VARSIZE_ANY_EXHDR(array_element_text)) &&
+ (memcmp(jsonb_iterator_value.val.string.val,
+ VARDATA_ANY(array_element_text),
+ jsonb_iterator_value.val.string.len) == 0))
+ {
+ skip_key++;
+ break;
+ }
+ }
+ }
+
+ if (skip_key == 0)
+ return_jsonb_value = pushJsonbValue(&state, WJB_KEY, &jsonb_iterator_value);
+ break;
+ case WJB_VALUE:
+ if (skip_key == 0)
+ return_jsonb_value = pushJsonbValue(&state, WJB_VALUE, &jsonb_iterator_value);
+ else if (skip_key > 0)
+ skip_key--;
+ break;
+ case WJB_END_ARRAY:
+ array_level--;
+ if (skip_key == 0)
+ return_jsonb_value = pushJsonbValue(&state, WJB_END_ARRAY, NULL);
+ else if (skip_key > 0 && array_level == 0)
+ skip_key--;
+ break;
+ case WJB_END_OBJECT:
+ nest_level--;
+ if (skip_key == 0)
+ return_jsonb_value = pushJsonbValue(&state, WJB_END_OBJECT, NULL);
+ else if (skip_key > 0)
+ skip_key--;
+ break;
+ default:
+ elog(ERROR, "invalid JsonbIteratorNext rc: %d", jsonb_iterator_token);
+ }
+ }
+ PG_FREE_IF_COPY(input_jsonb, 0);
+ PG_FREE_IF_COPY(input_array, 1);
+
+ PG_RETURN_JSONB(JsonbValueToJsonb(return_jsonb_value));
+}
+
+Datum jsonb_delete_jsonb(PG_FUNCTION_ARGS);
+
+PG_FUNCTION_INFO_V1(jsonb_delete_jsonb);
+
+/*
+ * Operator function to delete keys and values from left operand where a match
+ * is found in the right operand.
+ *
+ * jsonb, jsonb -> jsonb
+ *
+ */
+Datum
+jsonb_delete_jsonb(PG_FUNCTION_ARGS)
+{
+ /* pointers to incoming jsonb and text[] data */
+ Jsonb *input_jsonb_a = PG_GETARG_JSONB(0);
+ Jsonb *input_jsonb_b = PG_GETARG_JSONB(1);
+
+ /* pointers to return jsonb value data and state to be converted to jsonb on return */
+ JsonbValue *return_jsonb_value = NULL;
+ JsonbParseState *state = NULL;
+
+ /* pointer to iterator for input_jsonb_a and temporary value data */
+ JsonbIterator *jsonb_iterator;
+ JsonbValue jsonb_iterator_value;
+ JsonbValue jsonb_iterator_key;
+ int32 jsonb_iterator_token;
+ bool skip_nested = false;
+
+ bool push = true;
+
+ /* pointer to lookup on input_jsonb_b */
+ JsonbValue *jsonb_lookup_value = NULL;
+
+ /*
+ * check if either right jsonb is empty and return left if so
+ */
+ if (JB_ROOT_COUNT(input_jsonb_b) == 0)
+ PG_RETURN_JSONB(input_jsonb_a);
+
+ jsonb_iterator = JsonbIteratorInit(&input_jsonb_a->root);
+
+ while ((jsonb_iterator_token = JsonbIteratorNext(&jsonb_iterator, &jsonb_iterator_value, skip_nested)) != WJB_DONE)
+ {
+ skip_nested = true;
+ push = true;
+
+ switch (jsonb_iterator_token)
+ {
+ case WJB_BEGIN_ARRAY:
+ case WJB_BEGIN_OBJECT:
+ case WJB_END_ARRAY:
+ case WJB_END_OBJECT:
+ return_jsonb_value = pushJsonbValue(&state, jsonb_iterator_token, NULL);
+ break;
+ case WJB_ELEM:
+ /*
+ * findJsonbValueFromContainer only supports jsonb arrays containting scalar values?
+ * If container is something like '[[1]]' or '[{"a":1}]' will error with "invalid jsonb scalar type"
+ */
+ jsonb_lookup_value = findJsonbValueFromContainer(&input_jsonb_b->root, JB_FOBJECT | JB_FARRAY, &jsonb_iterator_value);
+ if (jsonb_lookup_value == NULL)
+ {
+ if (jsonb_iterator_value.type == jbvBinary)
+ {
+ return_jsonb_value = pushJsonbBinary(&state, jsonb_iterator_value.val.binary.data);
+ }
+ else
+ {
+ return_jsonb_value = pushJsonbValue(&state, WJB_ELEM, &jsonb_iterator_value);
+ }
+ }
+ break;
+ case WJB_KEY :
+ jsonb_lookup_value = findJsonbValueFromContainer(&input_jsonb_b->root, JB_FOBJECT | JB_FARRAY, &jsonb_iterator_value);
+
+ jsonb_iterator_key = jsonb_iterator_value;
+ jsonb_iterator_token = JsonbIteratorNext(&jsonb_iterator, &jsonb_iterator_value, skip_nested);
+ if (jsonb_iterator_token != WJB_VALUE)
+ elog(ERROR, "invalid JsonbIteratorNext (expected WJB_VALUE) rc: %d", jsonb_iterator_token);
+
+ if (jsonb_lookup_value != NULL)
+ {
+
+ if (jsonb_lookup_value->type == jsonb_iterator_value.type)
+ {
+ switch (jsonb_lookup_value->type)
+ {
+ case jbvNull:
+ push = false;
+ break;
+ case jbvNumeric:
+ if (DatumGetBool(DirectFunctionCall2(numeric_eq,
+ PointerGetDatum(jsonb_lookup_value->val.numeric),
+ PointerGetDatum(jsonb_iterator_value.val.numeric))))
+ push = false;
+ break;
+ case jbvString:
+ if ((jsonb_lookup_value->val.string.len == jsonb_iterator_value.val.string.len) &&
+ (memcmp(jsonb_lookup_value->val.string.val,
+ jsonb_iterator_value.val.string.val,
+ jsonb_lookup_value->val.string.len) == 0))
+ push = false;
+ break;
+ case jbvBinary:
+ if ((jsonb_lookup_value->val.binary.len == jsonb_iterator_value.val.binary.len) &&
+ (memcmp(jsonb_lookup_value->val.binary.data,
+ jsonb_iterator_value.val.binary.data,
+ jsonb_lookup_value->val.binary.len) == 0))
+ push = false;
+ break;
+ case jbvBool:
+ if (jsonb_lookup_value->val.boolean == jsonb_iterator_value.val.boolean)
+ push = false;
+ break;
+ case jbvArray:
+ /* should not be possible? */
+ case jbvObject:
+ /* should not be possible? */
+ default:
+ ereport(ERROR, (errcode(ERRCODE_SUCCESSFUL_COMPLETION), errmsg("unexpected lookup type %i", jsonb_iterator_token)));
+ }
+ }
+ }
+
+ if (push)
+ {
+ return_jsonb_value = pushJsonbValue(&state, WJB_KEY, &jsonb_iterator_key);
+
+ /* if our value is nested binary data, iterate separately pushing each val */
+ if (jsonb_iterator_value.type == jbvBinary)
+ {
+ return_jsonb_value = pushJsonbBinary(&state, jsonb_iterator_value.val.binary.data);
+ }
+ else
+ {
+ return_jsonb_value = pushJsonbValue(&state, jsonb_iterator_token, &jsonb_iterator_value);
+ }
+ }
+ break;
+ case WJB_VALUE:
+ /* should not be possible */
+ default:
+ elog(ERROR, "invalid JsonbIteratorNext rc: %d", jsonb_iterator_token);
+ }
+
+ }
+
+ PG_FREE_IF_COPY(input_jsonb_a, 0);
+ PG_FREE_IF_COPY(input_jsonb_b, 1);
+
+ PG_RETURN_JSONB(JsonbValueToJsonb(return_jsonb_value));
+}
+
+Datum jsonb_delete_path(PG_FUNCTION_ARGS);
+
+PG_FUNCTION_INFO_V1(jsonb_delete_path);
+
+/*
+ * Test
+ * jsonb, text[] -> jsonb
+ *
+ */
+Datum
+jsonb_delete_path(PG_FUNCTION_ARGS)
+{
+ /* pointers to incoming jsonb and text[] data */
+ Jsonb *input_jsonb_a = PG_GETARG_JSONB(0);
+ ArrayType *input_array = PG_GETARG_ARRAYTYPE_P(1);
+ //Jsonb *input_jsonb_b = PG_GETARG_JSONB(2);
+
+ /* pointer to return jsonb data */
+ Jsonb *return_jsonb = NULL;
+
+ return_jsonb = jsonbModifyPath(input_jsonb_a, input_array, NULL);
+
+ PG_FREE_IF_COPY(input_jsonb_a, 0);
+ PG_FREE_IF_COPY(input_array, 1);
+ //PG_FREE_IF_COPY(input_jsonb_b, 2);
+
+ PG_RETURN_JSONB(return_jsonb);
+}
+
+Datum jsonb_concat_jsonb(PG_FUNCTION_ARGS);
+
+PG_FUNCTION_INFO_V1(jsonb_concat_jsonb);
+
+/*
+ * Operator function to concatenate json from left operand where a match
+ * is found in the right operand.
+ *
+ * jsonb, jsonb -> jsonb
+ *
+ */
+Datum
+jsonb_concat_jsonb(PG_FUNCTION_ARGS)
+{
+ /* incoming jsonb data */
+ Jsonb *input_jsonb_a = PG_GETARG_JSONB(0);
+ Jsonb *input_jsonb_b = PG_GETARG_JSONB(1);
+
+ /* return jsonb value data to be converted to jsonb on return */
+ JsonbParseState *state = NULL;
+ JsonbValue *return_jsonb_value = NULL;
+
+ /* iterator for input_jsonb_b */
+ JsonbIterator *jsonb_iterator;
+ JsonbValue jsonb_iterator_value;
+ int32 jsonb_iterator_token;
+ int32 jsonb_root_open;
+ int32 jsonb_root_close;
+
+ int32 nest_level = 0;
+ bool first = true;
+
+ /*
+ * check if either supplied jsonb is empty and return the other if so
+ */
+ if (JB_ROOT_COUNT(input_jsonb_a) == 0)
+ PG_RETURN_JSONB(input_jsonb_b);
+ else if (JB_ROOT_COUNT(input_jsonb_b) == 0)
+ PG_RETURN_JSONB(input_jsonb_a);
+
+ /*
+ * rather than restrict concatenation to objects, allow any jsonb root
+ * but if one is an array use an array as the root container else
+ * default to object
+ */
+ if (JB_ROOT_IS_ARRAY(input_jsonb_a) || JB_ROOT_IS_ARRAY(input_jsonb_b))
+ {
+ jsonb_root_open = WJB_BEGIN_ARRAY;
+ jsonb_root_close = WJB_END_ARRAY;
+ } else
+ {
+ jsonb_root_open = WJB_BEGIN_OBJECT;
+ jsonb_root_close = WJB_END_OBJECT;
+ }
+
+ /*
+ * The following is essentially a cut 'n shut job; discarding the closing root
+ * object token from the first jsonb value and the opening one from the second.
+ * Values from each are just blindly pushed onto the return value leaving
+ * deduplication down to lower level jsonb logic.
+ */
+
+ return_jsonb_value = pushJsonbValue(&state, jsonb_root_open, NULL);
+
+ jsonb_iterator = JsonbIteratorInit(&input_jsonb_a->root);
+
+ while ((jsonb_iterator_token = JsonbIteratorNext(&jsonb_iterator, &jsonb_iterator_value, false)) != WJB_DONE)
+ {
+ if (jsonb_iterator_token == jsonb_root_open && first)
+ {
+ nest_level++;
+ if (nest_level == 1)
+ continue;
+ }
+ else if (jsonb_iterator_token == jsonb_root_close && nest_level != 0)
+ {
+ nest_level--;
+ if (nest_level == 0)
+ continue;
+ }
+ first = false;
+
+ return_jsonb_value = pushJsonbValueBlind(&state, jsonb_iterator_token, &jsonb_iterator_value);
+ }
+
+ first = true;
+ nest_level = 0;
+ jsonb_iterator = JsonbIteratorInit(&input_jsonb_b->root);
+
+ while ((jsonb_iterator_token = JsonbIteratorNext(&jsonb_iterator, &jsonb_iterator_value, false)) != WJB_DONE)
+ {
+ if (jsonb_iterator_token == jsonb_root_open && first)
+ {
+ nest_level++;
+ if (nest_level == 1)
+ continue;
+ }
+ else if (jsonb_iterator_token == jsonb_root_close && nest_level != 0)
+ {
+ nest_level--;
+ if (nest_level == 0)
+ continue;
+ }
+ first = false;
+
+ return_jsonb_value = pushJsonbValueBlind(&state, jsonb_iterator_token, &jsonb_iterator_value);
+ }
+
+ return_jsonb_value = pushJsonbValue(&state, jsonb_root_close, NULL);
+
+ PG_FREE_IF_COPY(input_jsonb_a, 0);
+ PG_FREE_IF_COPY(input_jsonb_b, 1);
+
+ PG_RETURN_JSONB(JsonbValueToJsonb(return_jsonb_value));
+}
+
+Datum jsonb_replace_jsonb(PG_FUNCTION_ARGS);
+
+PG_FUNCTION_INFO_V1(jsonb_replace_jsonb);
+
+/*
+ * Operator function to replace json in left operand where keys match
+ * in the right operand.
+ *
+ * jsonb, jsonb -> jsonb
+ *
+ */
+Datum
+jsonb_replace_jsonb(PG_FUNCTION_ARGS)
+{
+ /* incoming jsonb data */
+ Jsonb *input_jsonb_a = PG_GETARG_JSONB(0);
+ Jsonb *input_jsonb_b = PG_GETARG_JSONB(1);
+
+ /* return jsonb value data to be converted to jsonb on return */
+ JsonbParseState *state = NULL;
+ JsonbValue *return_jsonb_value = NULL;
+
+ /* lookup jsonb value data */
+ JsonbValue jsonb_lookup_key;
+ JsonbValue *jsonb_lookup_value = NULL;
+ uint32 jsonb_lookup_flags;
+
+ /* iterator for input_jsonb_b */
+ JsonbIterator *jsonb_iterator;
+ JsonbValue jsonb_iterator_value;
+ int32 jsonb_iterator_token;
+
+ /*
+ * check if supplied replacement jsonb is empty and return unchanged if so
+ */
+ if (JB_ROOT_COUNT(input_jsonb_b) == 0)
+ PG_RETURN_JSONB(input_jsonb_a);
+
+ if (JB_ROOT_IS_OBJECT(input_jsonb_a))
+ jsonb_lookup_flags = JB_FOBJECT;
+ else
+ jsonb_lookup_flags = JB_FOBJECT | JB_FARRAY;
+
+ jsonb_iterator = JsonbIteratorInit(&input_jsonb_a->root);
+ while ((jsonb_iterator_token = JsonbIteratorNext(&jsonb_iterator, &jsonb_iterator_value, true)) != WJB_DONE)
+ {
+ if ((jsonb_iterator_token == WJB_ELEM ) && (jsonb_iterator_value.type == jbvBinary))
+ {
+ return_jsonb_value = pushJsonbBinary(&state, jsonb_iterator_value.val.binary.data);
+ }
+ else
+ {
+ return_jsonb_value = pushJsonbValueBlind(&state, jsonb_iterator_token, &jsonb_iterator_value);
+ }
+
+ Assert(jsonb_iterator_token != WJB_VALUE);
+
+ if ( jsonb_iterator_token == WJB_KEY )
+ {
+ jsonb_lookup_key.type = jbvString;
+ jsonb_lookup_key.val.string.val = jsonb_iterator_value.val.string.val;
+ jsonb_lookup_key.val.string.len = jsonb_iterator_value.val.string.len;
+
+ jsonb_iterator_token = JsonbIteratorNext(&jsonb_iterator, &jsonb_iterator_value, true);
+ Assert(jsonb_iterator_token == WJB_VALUE);
+
+ jsonb_lookup_value = findJsonbValueFromContainer(&input_jsonb_b->root,
+ jsonb_lookup_flags, &jsonb_lookup_key);
+
+ /* if there's nothing to replace push the original value */
+ if (jsonb_lookup_value == NULL)
+ {
+ jsonb_lookup_value = &jsonb_iterator_value;
+ }
+
+ /* if our value is nested binary data, iterate separately pushing each val */
+ if (jsonb_lookup_value->type == jbvBinary)
+ {
+ return_jsonb_value = pushJsonbBinary(&state, jsonb_lookup_value->val.binary.data);
+ }
+ else
+ {
+ return_jsonb_value = pushJsonbValue(&state, WJB_VALUE, jsonb_lookup_value);
+ }
+ }
+ }
+
+ PG_FREE_IF_COPY(input_jsonb_a, 0);
+ PG_FREE_IF_COPY(input_jsonb_b, 1);
+
+ PG_RETURN_JSONB(JsonbValueToJsonb(return_jsonb_value));
+}
+
+Datum jsonb_replace_path(PG_FUNCTION_ARGS);
+
+PG_FUNCTION_INFO_V1(jsonb_replace_path);
+
+/*
+ * Test
+ * jsonb, text[], jsonb -> jsonb
+ *
+ */
+Datum
+jsonb_replace_path(PG_FUNCTION_ARGS)
+{
+ /* pointers to incoming jsonb and text[] data */
+ Jsonb *input_jsonb_a = PG_GETARG_JSONB(0);
+ ArrayType *input_array = PG_GETARG_ARRAYTYPE_P(1);
+ Jsonb *input_jsonb_b = PG_GETARG_JSONB(2);
+
+ /* pointer to return jsonb data */
+ Jsonb *return_jsonb = NULL;
+
+ return_jsonb = jsonbModifyPath(input_jsonb_a, input_array, input_jsonb_b);
+
+ PG_FREE_IF_COPY(input_jsonb_a, 0);
+ PG_FREE_IF_COPY(input_array, 1);
+ PG_FREE_IF_COPY(input_jsonb_b, 2);
+
+ PG_RETURN_JSONB(return_jsonb);
+}
projects / postgresql / pg_jsonb_opx / blobdiff