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https://git.postgresql.org/git/postgresql.git
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414c5a2ea6
This adds collation support for columns and domains, a COLLATE clause to override it per expression, and B-tree index support. Peter Eisentraut reviewed by Pavel Stehule, Itagaki Takahiro, Robert Haas, Noah Misch
227 lines
5.3 KiB
C
227 lines
5.3 KiB
C
/*
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* contrib/btree_gist/btree_text.c
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*/
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#include "btree_gist.h"
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#include "btree_utils_var.h"
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#include "catalog/pg_collation.h"
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#include "utils/builtins.h"
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/*
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** Text ops
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*/
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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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Datum gbt_text_compress(PG_FUNCTION_ARGS);
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Datum gbt_bpchar_compress(PG_FUNCTION_ARGS);
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Datum gbt_text_union(PG_FUNCTION_ARGS);
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Datum gbt_text_picksplit(PG_FUNCTION_ARGS);
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Datum gbt_text_consistent(PG_FUNCTION_ARGS);
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Datum gbt_bpchar_consistent(PG_FUNCTION_ARGS);
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Datum gbt_text_penalty(PG_FUNCTION_ARGS);
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Datum gbt_text_same(PG_FUNCTION_ARGS);
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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)
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{
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return (DatumGetBool(DirectFunctionCall2WithCollation(text_gt, DEFAULT_COLLATION_OID, PointerGetDatum(a), PointerGetDatum(b))));
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}
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static bool
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gbt_textge(const void *a, const void *b)
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{
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return (DatumGetBool(DirectFunctionCall2WithCollation(text_ge, DEFAULT_COLLATION_OID, PointerGetDatum(a), PointerGetDatum(b))));
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}
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static bool
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gbt_texteq(const void *a, const void *b)
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{
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return (DatumGetBool(DirectFunctionCall2WithCollation(texteq, DEFAULT_COLLATION_OID, PointerGetDatum(a), PointerGetDatum(b))));
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}
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static bool
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gbt_textle(const void *a, const void *b)
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{
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return (DatumGetBool(DirectFunctionCall2WithCollation(text_le, DEFAULT_COLLATION_OID, PointerGetDatum(a), PointerGetDatum(b))));
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}
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static bool
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gbt_textlt(const void *a, const void *b)
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{
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return (DatumGetBool(DirectFunctionCall2WithCollation(text_lt, DEFAULT_COLLATION_OID, PointerGetDatum(a), PointerGetDatum(b))));
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}
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static int32
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gbt_textcmp(const bytea *a, const bytea *b)
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{
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return DatumGetInt32(DirectFunctionCall2WithCollation(bttextcmp, DEFAULT_COLLATION_OID, PointerGetDatum(a), 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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/**************************************************
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* Text ops
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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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GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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GISTENTRY *retval;
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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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if (entry->leafkey)
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{
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Datum d = DirectFunctionCall1(rtrim1, entry->key);
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GISTENTRY trim;
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gistentryinit(trim, d,
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entry->rel, entry->page,
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entry->offset, TRUE);
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retval = gbt_var_compress(&trim, &tinfo);
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}
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else
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retval = entry;
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PG_RETURN_POINTER(retval);
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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 = (void *) 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, GIST_LEAF(entry), &tinfo);
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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 = (void *) DatumGetPointer(PG_DETOAST_DATUM(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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void *trim = (void *) DatumGetPointer(DirectFunctionCall1(rtrim1, PointerGetDatum(query)));
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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, trim, &strategy, GIST_LEAF(entry), &tinfo);
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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, &tinfo));
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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, &tinfo);
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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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PG_RETURN_POINTER(gbt_var_same(result, d1, d2, &tinfo));
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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, &tinfo));
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}
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