64 lines
2.2 KiB
C
64 lines
2.2 KiB
C
/*-------------------------------------------------------------------------
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*
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* jsonfuncs.h
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* Functions to process JSON data types.
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*
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* Portions Copyright (c) 1996-2023, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* src/include/utils/jsonfuncs.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef JSONFUNCS_H
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#define JSONFUNCS_H
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#include "common/jsonapi.h"
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#include "utils/jsonb.h"
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/*
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* Flag types for iterate_json(b)_values to specify what elements from a
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* json(b) document we want to iterate.
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*/
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typedef enum JsonToIndex
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{
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jtiKey = 0x01,
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jtiString = 0x02,
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jtiNumeric = 0x04,
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jtiBool = 0x08,
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jtiAll = jtiKey | jtiString | jtiNumeric | jtiBool
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} JsonToIndex;
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/* an action that will be applied to each value in iterate_json(b)_values functions */
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typedef void (*JsonIterateStringValuesAction) (void *state, char *elem_value, int elem_len);
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/* an action that will be applied to each value in transform_json(b)_values functions */
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typedef text *(*JsonTransformStringValuesAction) (void *state, char *elem_value, int elem_len);
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/* build a JsonLexContext from a text datum */
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extern JsonLexContext *makeJsonLexContext(text *json, bool need_escapes);
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/* try to parse json, and errsave(escontext) on failure */
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extern bool pg_parse_json_or_errsave(JsonLexContext *lex, JsonSemAction *sem,
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struct Node *escontext);
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#define pg_parse_json_or_ereport(lex, sem) \
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(void) pg_parse_json_or_errsave(lex, sem, NULL)
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/* save an error during json lexing or parsing */
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extern void json_errsave_error(JsonParseErrorType error, JsonLexContext *lex,
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struct Node *escontext);
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extern uint32 parse_jsonb_index_flags(Jsonb *jb);
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extern void iterate_jsonb_values(Jsonb *jb, uint32 flags, void *state,
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JsonIterateStringValuesAction action);
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extern void iterate_json_values(text *json, uint32 flags, void *action_state,
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JsonIterateStringValuesAction action);
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extern Jsonb *transform_jsonb_string_values(Jsonb *jsonb, void *action_state,
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JsonTransformStringValuesAction transform_action);
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extern text *transform_json_string_values(text *json, void *action_state,
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JsonTransformStringValuesAction transform_action);
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#endif
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