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350 lines
8.3 KiB
350 lines
8.3 KiB
/*
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* contrib/btree_gist/btree_text.c
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*/
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#include "postgres.h"
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#include "btree_gist.h"
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#include "btree_utils_var.h"
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#include "mb/pg_wchar.h"
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#include "utils/fmgrprotos.h"
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#include "utils/sortsupport.h"
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/* GiST support functions */
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PG_FUNCTION_INFO_V1(gbt_text_compress);
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PG_FUNCTION_INFO_V1(gbt_bpchar_compress);
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PG_FUNCTION_INFO_V1(gbt_text_union);
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PG_FUNCTION_INFO_V1(gbt_text_picksplit);
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PG_FUNCTION_INFO_V1(gbt_text_consistent);
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PG_FUNCTION_INFO_V1(gbt_bpchar_consistent);
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PG_FUNCTION_INFO_V1(gbt_text_penalty);
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PG_FUNCTION_INFO_V1(gbt_text_same);
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PG_FUNCTION_INFO_V1(gbt_text_sortsupport);
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PG_FUNCTION_INFO_V1(gbt_bpchar_sortsupport);
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/* define for comparison */
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static bool
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gbt_textgt(const void *a, const void *b, Oid collation, FmgrInfo *flinfo)
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{
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return DatumGetBool(DirectFunctionCall2Coll(text_gt,
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collation,
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PointerGetDatum(a),
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PointerGetDatum(b)));
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}
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static bool
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gbt_textge(const void *a, const void *b, Oid collation, FmgrInfo *flinfo)
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{
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return DatumGetBool(DirectFunctionCall2Coll(text_ge,
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collation,
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PointerGetDatum(a),
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PointerGetDatum(b)));
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}
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static bool
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gbt_texteq(const void *a, const void *b, Oid collation, FmgrInfo *flinfo)
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{
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return DatumGetBool(DirectFunctionCall2Coll(texteq,
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collation,
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PointerGetDatum(a),
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PointerGetDatum(b)));
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}
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static bool
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gbt_textle(const void *a, const void *b, Oid collation, FmgrInfo *flinfo)
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{
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return DatumGetBool(DirectFunctionCall2Coll(text_le,
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collation,
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PointerGetDatum(a),
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PointerGetDatum(b)));
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}
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static bool
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gbt_textlt(const void *a, const void *b, Oid collation, FmgrInfo *flinfo)
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{
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return DatumGetBool(DirectFunctionCall2Coll(text_lt,
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collation,
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PointerGetDatum(a),
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PointerGetDatum(b)));
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}
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static int32
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gbt_textcmp(const void *a, const void *b, Oid collation, FmgrInfo *flinfo)
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{
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return DatumGetInt32(DirectFunctionCall2Coll(bttextcmp,
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collation,
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PointerGetDatum(a),
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PointerGetDatum(b)));
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}
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static gbtree_vinfo tinfo =
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{
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gbt_t_text,
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0,
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false,
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gbt_textgt,
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gbt_textge,
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gbt_texteq,
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gbt_textle,
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gbt_textlt,
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gbt_textcmp,
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NULL
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};
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/* bpchar needs its own comparison rules */
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static bool
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gbt_bpchargt(const void *a, const void *b, Oid collation, FmgrInfo *flinfo)
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{
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return DatumGetBool(DirectFunctionCall2Coll(bpchargt,
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collation,
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PointerGetDatum(a),
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PointerGetDatum(b)));
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}
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static bool
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gbt_bpcharge(const void *a, const void *b, Oid collation, FmgrInfo *flinfo)
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{
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return DatumGetBool(DirectFunctionCall2Coll(bpcharge,
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collation,
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PointerGetDatum(a),
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PointerGetDatum(b)));
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}
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static bool
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gbt_bpchareq(const void *a, const void *b, Oid collation, FmgrInfo *flinfo)
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{
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return DatumGetBool(DirectFunctionCall2Coll(bpchareq,
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collation,
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PointerGetDatum(a),
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PointerGetDatum(b)));
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}
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static bool
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gbt_bpcharle(const void *a, const void *b, Oid collation, FmgrInfo *flinfo)
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{
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return DatumGetBool(DirectFunctionCall2Coll(bpcharle,
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collation,
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PointerGetDatum(a),
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PointerGetDatum(b)));
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}
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static bool
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gbt_bpcharlt(const void *a, const void *b, Oid collation, FmgrInfo *flinfo)
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{
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return DatumGetBool(DirectFunctionCall2Coll(bpcharlt,
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collation,
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PointerGetDatum(a),
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PointerGetDatum(b)));
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}
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static int32
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gbt_bpcharcmp(const void *a, const void *b, Oid collation, FmgrInfo *flinfo)
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{
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return DatumGetInt32(DirectFunctionCall2Coll(bpcharcmp,
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collation,
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PointerGetDatum(a),
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PointerGetDatum(b)));
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}
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static gbtree_vinfo bptinfo =
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{
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gbt_t_bpchar,
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0,
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false,
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gbt_bpchargt,
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gbt_bpcharge,
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gbt_bpchareq,
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gbt_bpcharle,
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gbt_bpcharlt,
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gbt_bpcharcmp,
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NULL
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};
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/**************************************************
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* GiST support functions
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**************************************************/
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Datum
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gbt_text_compress(PG_FUNCTION_ARGS)
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{
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GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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if (tinfo.eml == 0)
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{
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tinfo.eml = pg_database_encoding_max_length();
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}
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PG_RETURN_POINTER(gbt_var_compress(entry, &tinfo));
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}
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Datum
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gbt_bpchar_compress(PG_FUNCTION_ARGS)
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{
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/* This should never have been distinct from gbt_text_compress */
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return gbt_text_compress(fcinfo);
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}
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Datum
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gbt_text_consistent(PG_FUNCTION_ARGS)
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{
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GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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void *query = DatumGetTextP(PG_GETARG_DATUM(1));
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StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
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/* Oid subtype = PG_GETARG_OID(3); */
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bool *recheck = (bool *) PG_GETARG_POINTER(4);
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bool retval;
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GBT_VARKEY *key = (GBT_VARKEY *) DatumGetPointer(entry->key);
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GBT_VARKEY_R r = gbt_var_key_readable(key);
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/* All cases served by this function are exact */
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*recheck = false;
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if (tinfo.eml == 0)
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{
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tinfo.eml = pg_database_encoding_max_length();
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}
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retval = gbt_var_consistent(&r, query, strategy, PG_GET_COLLATION(),
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GIST_LEAF(entry), &tinfo, fcinfo->flinfo);
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PG_RETURN_BOOL(retval);
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}
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Datum
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gbt_bpchar_consistent(PG_FUNCTION_ARGS)
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{
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GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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void *query = DatumGetTextP(PG_GETARG_DATUM(1));
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StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
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/* Oid subtype = PG_GETARG_OID(3); */
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bool *recheck = (bool *) PG_GETARG_POINTER(4);
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bool retval;
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GBT_VARKEY *key = (GBT_VARKEY *) DatumGetPointer(entry->key);
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GBT_VARKEY_R r = gbt_var_key_readable(key);
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/* All cases served by this function are exact */
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*recheck = false;
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if (bptinfo.eml == 0)
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{
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bptinfo.eml = pg_database_encoding_max_length();
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}
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retval = gbt_var_consistent(&r, query, strategy, PG_GET_COLLATION(),
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GIST_LEAF(entry), &bptinfo, fcinfo->flinfo);
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PG_RETURN_BOOL(retval);
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}
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Datum
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gbt_text_union(PG_FUNCTION_ARGS)
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{
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GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
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int32 *size = (int *) PG_GETARG_POINTER(1);
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PG_RETURN_POINTER(gbt_var_union(entryvec, size, PG_GET_COLLATION(),
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&tinfo, fcinfo->flinfo));
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}
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Datum
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gbt_text_picksplit(PG_FUNCTION_ARGS)
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{
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GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
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GIST_SPLITVEC *v = (GIST_SPLITVEC *) PG_GETARG_POINTER(1);
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gbt_var_picksplit(entryvec, v, PG_GET_COLLATION(),
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&tinfo, fcinfo->flinfo);
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PG_RETURN_POINTER(v);
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}
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Datum
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gbt_text_same(PG_FUNCTION_ARGS)
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{
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Datum d1 = PG_GETARG_DATUM(0);
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Datum d2 = PG_GETARG_DATUM(1);
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bool *result = (bool *) PG_GETARG_POINTER(2);
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*result = gbt_var_same(d1, d2, PG_GET_COLLATION(), &tinfo, fcinfo->flinfo);
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PG_RETURN_POINTER(result);
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}
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Datum
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gbt_text_penalty(PG_FUNCTION_ARGS)
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{
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GISTENTRY *o = (GISTENTRY *) PG_GETARG_POINTER(0);
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GISTENTRY *n = (GISTENTRY *) PG_GETARG_POINTER(1);
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float *result = (float *) PG_GETARG_POINTER(2);
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PG_RETURN_POINTER(gbt_var_penalty(result, o, n, PG_GET_COLLATION(),
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&tinfo, fcinfo->flinfo));
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}
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static int
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gbt_text_ssup_cmp(Datum x, Datum y, SortSupport ssup)
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{
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GBT_VARKEY *key1 = PG_DETOAST_DATUM(x);
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GBT_VARKEY *key2 = PG_DETOAST_DATUM(y);
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GBT_VARKEY_R arg1 = gbt_var_key_readable(key1);
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GBT_VARKEY_R arg2 = gbt_var_key_readable(key2);
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Datum result;
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/* for leaf items we expect lower == upper, so only compare lower */
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result = DirectFunctionCall2Coll(bttextcmp,
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ssup->ssup_collation,
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PointerGetDatum(arg1.lower),
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PointerGetDatum(arg2.lower));
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GBT_FREE_IF_COPY(key1, x);
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GBT_FREE_IF_COPY(key2, y);
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return DatumGetInt32(result);
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}
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Datum
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gbt_text_sortsupport(PG_FUNCTION_ARGS)
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{
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SortSupport ssup = (SortSupport) PG_GETARG_POINTER(0);
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ssup->comparator = gbt_text_ssup_cmp;
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ssup->ssup_extra = NULL;
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PG_RETURN_VOID();
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}
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static int
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gbt_bpchar_ssup_cmp(Datum x, Datum y, SortSupport ssup)
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{
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GBT_VARKEY *key1 = PG_DETOAST_DATUM(x);
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GBT_VARKEY *key2 = PG_DETOAST_DATUM(y);
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GBT_VARKEY_R arg1 = gbt_var_key_readable(key1);
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GBT_VARKEY_R arg2 = gbt_var_key_readable(key2);
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Datum result;
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/* for leaf items we expect lower == upper, so only compare lower */
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result = DirectFunctionCall2Coll(bpcharcmp,
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ssup->ssup_collation,
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PointerGetDatum(arg1.lower),
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PointerGetDatum(arg2.lower));
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GBT_FREE_IF_COPY(key1, x);
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GBT_FREE_IF_COPY(key2, y);
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return DatumGetInt32(result);
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}
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Datum
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gbt_bpchar_sortsupport(PG_FUNCTION_ARGS)
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{
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SortSupport ssup = (SortSupport) PG_GETARG_POINTER(0);
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ssup->comparator = gbt_bpchar_ssup_cmp;
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ssup->ssup_extra = NULL;
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PG_RETURN_VOID();
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}
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