LCOV - differential code coverage report
Current view: top level - src/include/utils - jsonpath.h (source / functions) Coverage Total Hit CBC
Current: c70b6db34ffeab48beef1fb4ce61bcad3772b8dd vs 06473f5a344df8c9594ead90a609b86f6724cff8 Lines: 100.0 % 4 4 4
Current Date: 2025-09-06 07:49:51 +0900 Functions: 100.0 % 2 2 2
Baseline: lcov-20250906-005545-baseline Line coverage date bins:
Baseline Date: 2025-09-05 08:21:35 +0100 (360..) days: 100.0 % 4 4 4
Legend: Lines:     hit not hit Function coverage date bins:
(360..) days: 100.0 % 2 2 2

 Age         Owner                  TLA  Line data    Source code
                                  1                 : /*-------------------------------------------------------------------------
                                  2                 :  *
                                  3                 :  * jsonpath.h
                                  4                 :  *  Definitions for jsonpath datatype
                                  5                 :  *
                                  6                 :  * Copyright (c) 2019-2025, PostgreSQL Global Development Group
                                  7                 :  *
                                  8                 :  * IDENTIFICATION
                                  9                 :  *  src/include/utils/jsonpath.h
                                 10                 :  *
                                 11                 :  *-------------------------------------------------------------------------
                                 12                 :  */
                                 13                 : 
                                 14                 : #ifndef JSONPATH_H
                                 15                 : #define JSONPATH_H
                                 16                 : 
                                 17                 : #include "executor/tablefunc.h"
                                 18                 : #include "fmgr.h"
                                 19                 : #include "nodes/pg_list.h"
                                 20                 : #include "nodes/primnodes.h"
                                 21                 : #include "utils/jsonb.h"
                                 22                 : 
                                 23                 : typedef struct
                                 24                 : {
                                 25                 :     int32       vl_len_;        /* varlena header (do not touch directly!) */
                                 26                 :     uint32      header;         /* version and flags (see below) */
                                 27                 :     char        data[FLEXIBLE_ARRAY_MEMBER];
                                 28                 : } JsonPath;
                                 29                 : 
                                 30                 : #define JSONPATH_VERSION    (0x01)
                                 31                 : #define JSONPATH_LAX        (0x80000000)
                                 32                 : #define JSONPATH_HDRSZ      (offsetof(JsonPath, data))
                                 33                 : 
                                 34                 : static inline JsonPath *
 1075 peter@eisentraut.org       35 CBC       98686 : DatumGetJsonPathP(Datum d)
                                 36                 : {
                                 37           98686 :     return (JsonPath *) PG_DETOAST_DATUM(d);
                                 38                 : }
                                 39                 : 
                                 40                 : static inline JsonPath *
                                 41            2034 : DatumGetJsonPathPCopy(Datum d)
                                 42                 : {
                                 43            2034 :     return (JsonPath *) PG_DETOAST_DATUM_COPY(d);
                                 44                 : }
                                 45                 : 
                                 46                 : #define PG_GETARG_JSONPATH_P(x)         DatumGetJsonPathP(PG_GETARG_DATUM(x))
                                 47                 : #define PG_GETARG_JSONPATH_P_COPY(x)    DatumGetJsonPathPCopy(PG_GETARG_DATUM(x))
                                 48                 : #define PG_RETURN_JSONPATH_P(p)         PG_RETURN_POINTER(p)
                                 49                 : 
                                 50                 : #define jspIsScalar(type) ((type) >= jpiNull && (type) <= jpiBool)
                                 51                 : 
                                 52                 : /*
                                 53                 :  * All node's type of jsonpath expression
                                 54                 :  *
                                 55                 :  * These become part of the on-disk representation of the jsonpath type.
                                 56                 :  * Therefore, to preserve pg_upgradability, the order must not be changed, and
                                 57                 :  * new values must be added at the end.
                                 58                 :  *
                                 59                 :  * It is recommended that switch cases etc. in other parts of the code also
                                 60                 :  * use this order, to maintain some consistency.
                                 61                 :  */
                                 62                 : typedef enum JsonPathItemType
                                 63                 : {
                                 64                 :     jpiNull = jbvNull,          /* NULL literal */
                                 65                 :     jpiString = jbvString,      /* string literal */
                                 66                 :     jpiNumeric = jbvNumeric,    /* numeric literal */
                                 67                 :     jpiBool = jbvBool,          /* boolean literal: TRUE or FALSE */
                                 68                 :     jpiAnd,                     /* predicate && predicate */
                                 69                 :     jpiOr,                      /* predicate || predicate */
                                 70                 :     jpiNot,                     /* ! predicate */
                                 71                 :     jpiIsUnknown,               /* (predicate) IS UNKNOWN */
                                 72                 :     jpiEqual,                   /* expr == expr */
                                 73                 :     jpiNotEqual,                /* expr != expr */
                                 74                 :     jpiLess,                    /* expr < expr */
                                 75                 :     jpiGreater,                 /* expr > expr */
                                 76                 :     jpiLessOrEqual,             /* expr <= expr */
                                 77                 :     jpiGreaterOrEqual,          /* expr >= expr */
                                 78                 :     jpiAdd,                     /* expr + expr */
                                 79                 :     jpiSub,                     /* expr - expr */
                                 80                 :     jpiMul,                     /* expr * expr */
                                 81                 :     jpiDiv,                     /* expr / expr */
                                 82                 :     jpiMod,                     /* expr % expr */
                                 83                 :     jpiPlus,                    /* + expr */
                                 84                 :     jpiMinus,                   /* - expr */
                                 85                 :     jpiAnyArray,                /* [*] */
                                 86                 :     jpiAnyKey,                  /* .* */
                                 87                 :     jpiIndexArray,              /* [subscript, ...] */
                                 88                 :     jpiAny,                     /* .** */
                                 89                 :     jpiKey,                     /* .key */
                                 90                 :     jpiCurrent,                 /* @ */
                                 91                 :     jpiRoot,                    /* $ */
                                 92                 :     jpiVariable,                /* $variable */
                                 93                 :     jpiFilter,                  /* ? (predicate) */
                                 94                 :     jpiExists,                  /* EXISTS (expr) predicate */
                                 95                 :     jpiType,                    /* .type() item method */
                                 96                 :     jpiSize,                    /* .size() item method */
                                 97                 :     jpiAbs,                     /* .abs() item method */
                                 98                 :     jpiFloor,                   /* .floor() item method */
                                 99                 :     jpiCeiling,                 /* .ceiling() item method */
                                100                 :     jpiDouble,                  /* .double() item method */
                                101                 :     jpiDatetime,                /* .datetime() item method */
                                102                 :     jpiKeyValue,                /* .keyvalue() item method */
                                103                 :     jpiSubscript,               /* array subscript: 'expr' or 'expr TO expr' */
                                104                 :     jpiLast,                    /* LAST array subscript */
                                105                 :     jpiStartsWith,              /* STARTS WITH predicate */
                                106                 :     jpiLikeRegex,               /* LIKE_REGEX predicate */
                                107                 :     jpiBigint,                  /* .bigint() item method */
                                108                 :     jpiBoolean,                 /* .boolean() item method */
                                109                 :     jpiDate,                    /* .date() item method */
                                110                 :     jpiDecimal,                 /* .decimal() item method */
                                111                 :     jpiInteger,                 /* .integer() item method */
                                112                 :     jpiNumber,                  /* .number() item method */
                                113                 :     jpiStringFunc,              /* .string() item method */
                                114                 :     jpiTime,                    /* .time() item method */
                                115                 :     jpiTimeTz,                  /* .time_tz() item method */
                                116                 :     jpiTimestamp,               /* .timestamp() item method */
                                117                 :     jpiTimestampTz,             /* .timestamp_tz() item method */
                                118                 : } JsonPathItemType;
                                119                 : 
                                120                 : /* XQuery regex mode flags for LIKE_REGEX predicate */
                                121                 : #define JSP_REGEX_ICASE     0x01    /* i flag, case insensitive */
                                122                 : #define JSP_REGEX_DOTALL    0x02    /* s flag, dot matches newline */
                                123                 : #define JSP_REGEX_MLINE     0x04    /* m flag, ^/$ match at newlines */
                                124                 : #define JSP_REGEX_WSPACE    0x08    /* x flag, ignore whitespace in pattern */
                                125                 : #define JSP_REGEX_QUOTE     0x10    /* q flag, no special characters */
                                126                 : 
                                127                 : /*
                                128                 :  * Support functions to parse/construct binary value.
                                129                 :  * Unlike many other representation of expression the first/main
                                130                 :  * node is not an operation but left operand of expression. That
                                131                 :  * allows to implement cheap follow-path descending in jsonb
                                132                 :  * structure and then execute operator with right operand
                                133                 :  */
                                134                 : 
                                135                 : typedef struct JsonPathItem
                                136                 : {
                                137                 :     JsonPathItemType type;
                                138                 : 
                                139                 :     /* position form base to next node */
                                140                 :     int32       nextPos;
                                141                 : 
                                142                 :     /*
                                143                 :      * pointer into JsonPath value to current node, all positions of current
                                144                 :      * are relative to this base
                                145                 :      */
                                146                 :     char       *base;
                                147                 : 
                                148                 :     union
                                149                 :     {
                                150                 :         /* classic operator with two operands: and, or etc */
                                151                 :         struct
                                152                 :         {
                                153                 :             int32       left;
                                154                 :             int32       right;
                                155                 :         }           args;
                                156                 : 
                                157                 :         /* any unary operation */
                                158                 :         int32       arg;
                                159                 : 
                                160                 :         /* storage for jpiIndexArray: indexes of array */
                                161                 :         struct
                                162                 :         {
                                163                 :             int32       nelems;
                                164                 :             struct
                                165                 :             {
                                166                 :                 int32       from;
                                167                 :                 int32       to;
                                168                 :             }          *elems;
                                169                 :         }           array;
                                170                 : 
                                171                 :         /* jpiAny: levels */
                                172                 :         struct
                                173                 :         {
                                174                 :             uint32      first;
                                175                 :             uint32      last;
                                176                 :         }           anybounds;
                                177                 : 
                                178                 :         struct
                                179                 :         {
                                180                 :             char       *data;   /* for bool, numeric and string/key */
                                181                 :             int32       datalen;    /* filled only for string/key */
                                182                 :         }           value;
                                183                 : 
                                184                 :         struct
                                185                 :         {
                                186                 :             int32       expr;
                                187                 :             char       *pattern;
                                188                 :             int32       patternlen;
                                189                 :             uint32      flags;
                                190                 :         }           like_regex;
                                191                 :     }           content;
                                192                 : } JsonPathItem;
                                193                 : 
                                194                 : #define jspHasNext(jsp) ((jsp)->nextPos > 0)
                                195                 : 
                                196                 : extern void jspInit(JsonPathItem *v, JsonPath *js);
                                197                 : extern void jspInitByBuffer(JsonPathItem *v, char *base, int32 pos);
                                198                 : extern bool jspGetNext(JsonPathItem *v, JsonPathItem *a);
                                199                 : extern void jspGetArg(JsonPathItem *v, JsonPathItem *a);
                                200                 : extern void jspGetLeftArg(JsonPathItem *v, JsonPathItem *a);
                                201                 : extern void jspGetRightArg(JsonPathItem *v, JsonPathItem *a);
                                202                 : extern Numeric jspGetNumeric(JsonPathItem *v);
                                203                 : extern bool jspGetBool(JsonPathItem *v);
                                204                 : extern char *jspGetString(JsonPathItem *v, int32 *len);
                                205                 : extern bool jspGetArraySubscript(JsonPathItem *v, JsonPathItem *from,
                                206                 :                                  JsonPathItem *to, int i);
                                207                 : extern bool jspIsMutable(JsonPath *path, List *varnames, List *varexprs);
                                208                 : 
                                209                 : extern const char *jspOperationName(JsonPathItemType type);
                                210                 : 
                                211                 : /*
                                212                 :  * Parsing support data structures.
                                213                 :  */
                                214                 : 
                                215                 : typedef struct JsonPathParseItem JsonPathParseItem;
                                216                 : 
                                217                 : struct JsonPathParseItem
                                218                 : {
                                219                 :     JsonPathItemType type;
                                220                 :     JsonPathParseItem *next;    /* next in path */
                                221                 : 
                                222                 :     union
                                223                 :     {
                                224                 : 
                                225                 :         /* classic operator with two operands: and, or etc */
                                226                 :         struct
                                227                 :         {
                                228                 :             JsonPathParseItem *left;
                                229                 :             JsonPathParseItem *right;
                                230                 :         }           args;
                                231                 : 
                                232                 :         /* any unary operation */
                                233                 :         JsonPathParseItem *arg;
                                234                 : 
                                235                 :         /* storage for jpiIndexArray: indexes of array */
                                236                 :         struct
                                237                 :         {
                                238                 :             int         nelems;
                                239                 :             struct
                                240                 :             {
                                241                 :                 JsonPathParseItem *from;
                                242                 :                 JsonPathParseItem *to;
                                243                 :             }          *elems;
                                244                 :         }           array;
                                245                 : 
                                246                 :         /* jpiAny: levels */
                                247                 :         struct
                                248                 :         {
                                249                 :             uint32      first;
                                250                 :             uint32      last;
                                251                 :         }           anybounds;
                                252                 : 
                                253                 :         struct
                                254                 :         {
                                255                 :             JsonPathParseItem *expr;
                                256                 :             char       *pattern;    /* could not be not null-terminated */
                                257                 :             uint32      patternlen;
                                258                 :             uint32      flags;
                                259                 :         }           like_regex;
                                260                 : 
                                261                 :         /* scalars */
                                262                 :         Numeric numeric;
                                263                 :         bool        boolean;
                                264                 :         struct
                                265                 :         {
                                266                 :             uint32      len;
                                267                 :             char       *val;    /* could not be not null-terminated */
                                268                 :         }           string;
                                269                 :     }           value;
                                270                 : };
                                271                 : 
                                272                 : typedef struct JsonPathParseResult
                                273                 : {
                                274                 :     JsonPathParseItem *expr;
                                275                 :     bool        lax;
                                276                 : } JsonPathParseResult;
                                277                 : 
                                278                 : extern JsonPathParseResult *parsejsonpath(const char *str, int len,
                                279                 :                                           struct Node *escontext);
                                280                 : 
                                281                 : extern bool jspConvertRegexFlags(uint32 xflags, int *result,
                                282                 :                                  struct Node *escontext);
                                283                 : 
                                284                 : /*
                                285                 :  * Struct for details about external variables passed into jsonpath executor
                                286                 :  */
                                287                 : typedef struct JsonPathVariable
                                288                 : {
                                289                 :     char       *name;
                                290                 :     int         namelen;        /* strlen(name) as cache for GetJsonPathVar() */
                                291                 :     Oid         typid;
                                292                 :     int32       typmod;
                                293                 :     Datum       value;
                                294                 :     bool        isnull;
                                295                 : } JsonPathVariable;
                                296                 : 
                                297                 : 
                                298                 : /* SQL/JSON query functions */
                                299                 : extern bool JsonPathExists(Datum jb, JsonPath *jp, bool *error, List *vars);
                                300                 : extern Datum JsonPathQuery(Datum jb, JsonPath *jp, JsonWrapper wrapper,
                                301                 :                            bool *empty, bool *error, List *vars,
                                302                 :                            const char *column_name);
                                303                 : extern JsonbValue *JsonPathValue(Datum jb, JsonPath *jp, bool *empty,
                                304                 :                                  bool *error, List *vars,
                                305                 :                                  const char *column_name);
                                306                 : 
                                307                 : /* For JSON_TABLE() */
                                308                 : extern PGDLLIMPORT const TableFuncRoutine JsonbTableRoutine;
                                309                 : 
                                310                 : #endif
        

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