separate DB dependent from DB index.
This commit is contained in:
Vítor Santos Costa
38
packages/myddas/postgres/CMakeLists.txt
Normal file
38
packages/myddas/postgres/CMakeLists.txt
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@@ -0,0 +1,38 @@
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set( YAPPOSTGRES_SOURCES
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myddas_postgres.c
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)
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set(SO_MAJOR 1)
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set(SO_MINOR 0)
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set(SO_PATCH 0)
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macro_optional_find_package(POSTGRESQL ON)
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macro_log_feature (POSTGRES_FOUND "postgres"
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"POSTGRES Driver for MYDDAS Data-Base Interface "
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"http://www.postgres.org" FALSE)
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add_library (Yappostgres SHARED ${YAPPOSTGRES_SOURCES})
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if (POSTGRES_FOUND)
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# POSTGRES_INCLUDE_DIRECTORIES, where to find sql.h
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# POSTGRES_LIBRARIES, the libraries to link against to use POSTGRES
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# POSTGRES_FOUND. If false, you cannot build anything that requires Postgres.
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add_definitions (-DMYDDAS_POSTGRES=1)
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target_link_libraries(Yappostgres libYap ${POSTGRES_LIBRARIES})
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include_directories (${POSTGRES_INCLUDE_DIRECTORIES} ..)
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else()
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add_definitions (-DMYDDAS_POSTGRES=0)
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endif (POSTGRES_FOUND)
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set_target_properties (Yappostgres PROPERTIES
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POSITION_INDEPENDENT_CODE ON
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VERSION "${SO_MAJOR}.${SO_MINOR}.${SO_PATCH}"
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SOVERSION ${SO_MAJOR}
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)
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install(TARGETS Yappostgres
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LIBRARY DESTINATION ${libdir}
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)
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902
packages/myddas/postgres/myddas_postgres.c
Normal file
902
packages/myddas/postgres/myddas_postgres.c
Normal file
@@ -0,0 +1,902 @@
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/*************************************************************************
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* *
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* YAP Prolog *
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* *
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* Yap Prolog was developed at NCCUP - Universidade do Porto *
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* *
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* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
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* *
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**************************************************************************
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* *
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* File: myddas_postgres.c *
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* Last rev: 22/03/05 *
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* mods: *
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* comments: Predicates for comunicating with a pq database system *
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* *
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*************************************************************************/
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#if MYDDAS_POSTGRES
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#include <libpq-fe.h>
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#define BOOLOID 16
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#define BYTEOID 17
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#define CHAROID 18
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#define NAMEOID 19
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||||
#define INT8OID 20
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||||
#define INT2OID 21
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||||
#define INT2VECTOROID 22
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||||
#define INT4OID 23
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||||
#define REGPROCOID 24
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||||
#define TEXTOID 25
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||||
#define OIDOID 26
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||||
#define TIDOID 27
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||||
#define XIDOID 28
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||||
#define CIDOID 29
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||||
#define OIDVECTOROID 30
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||||
#define JSONOID 114
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||||
#define XMLOID 142
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||||
#define PGNODETREEOID 194
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||||
#define POINTOID 600
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||||
#define LSEGOID 601
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||||
#define PATHOID 602
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||||
#define BOXOID 603
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#define POLYGONOID 604
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||||
#define LINEOID 628
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||||
#define FLOAT4OID 700
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||||
#define FLOAT8OID 701
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||||
#define ABSTIMEOID 702
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#define RELTIMEOID 703
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||||
#define TINTERVALOID 704
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||||
#define UNKNOWNOID 705
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||||
#define CIRCLEOID 718
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||||
#define CASHOID 790
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||||
#define MACADDROID 829
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||||
#define INETOID 869
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||||
#define CIDROID 650
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#define INT2ARRAYOID 1005
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||||
#define INT4ARRAYOID 1007
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||||
#define TEXTARRAYOID 1009
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||||
#define OIDARRAYOID 1028
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||||
#define FLOAT4ARRAYOID 1021
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||||
#define ACLITEMOID 1033
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||||
#define CSTRINGARRAYOID 1263
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||||
#define BPCHAROID 1042
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||||
#define VARCHAROID 1043
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||||
#define DATEOID 1082
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||||
#define TIMEOID 1083
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||||
#define TIMESTAMPOID 1114
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||||
#define TIMESTAMPTZOID 1184
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#define INTERVALOID 1186
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||||
#define TIMETZOID 1266
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||||
#define BITOID 1560
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||||
#define VARBITOID 1562
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#define NUMERICOID 1700
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#define REFCURSOROID 1790
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#define REGPROCEDUREOID 2202
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#define REGOPEROID 2203
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#define REGOPERATOROID 2204
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#define REGCLASSOID 2205
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#define REGTYPEOID 2206
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#define REGTYPEARRAYOID 2211
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||||
#define UUIDOID 2950
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||||
#define LSNOID 3220
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#define TSVECTOROID 3614
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||||
#define GTSVECTOROID 3642
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||||
#define TSQUERYOID 3615
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||||
#define REGCONFIGOID 3734
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#define REGDICTIONARYOID 3769
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||||
#define JSONBOID 3802
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||||
#define INT4RANGEOID 3904
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#define RECORDOID 2249
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||||
#define RECORDARRAYOID 2287
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||||
#define CSTRINGOID 2275
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#define ANYOID 2276
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#define ANYARRAYOID 2277
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#define VOIDOID 2278
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#define TRIGGEROID 2279
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#define EVTTRIGGEROID 3838
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#define LANGUAGE_HANDLEROID 2280
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#define INTERNALOID 2281
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#define OPAQUEOID 2282
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#define ANYELEMENTOID 2283
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#define ANYNONARRAYOID 2776
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#define ANYENUMOID 3500
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#define FDW_HANDLEROID 3115
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#define ANYRANGEOID 3831
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#include "Yap.h"
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#include "Yatom.h"
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#include "YapText.h"
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#include "cut_c.h"
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#include "eval.h"
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#include "myddas.h"
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#ifdef MYDDAS_STATS
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#include "myddas_structs.h"
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#include "myddas_statistics.h"
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#endif
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#include "myddas_wkb2prolog.h"
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#define CALL_POSTGRES(f) \
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{ \
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res = PQ ## f; \
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if (PQstatus(db) != CONNECTION_OK) { \
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fprintf(stderr, "Error %s when calling %s, line %d\n", \
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PQerrorMessage(db), #f,__LINE__); \
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exit (1); \
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} \
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PQclear(res); \
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} \
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#define GET_POSTGRES(f, res) \
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{ \
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res = PQ ## f; \
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if (PQstatus(db) != CONNECTION_OK) { \
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fprintf (stderr, "%s failed with status %s, line %d\n", \
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#f, PQerrorMessage (db), __LINE__); \
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exit (1); \
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} \
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} \
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static Int NULL_id = 0;
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typedef struct result_set {
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PGconn *db;
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PGresult *res;
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const char *stmt;
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int i ;
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int nrows;
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int ncols;
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} resultSet;
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void Yap_InitMYDDAS_PGPreds(void);
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void Yap_InitBackMYDDAS_PGPreds(void);
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static Int c_postgres_connect( USES_REGS1 );
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static Int c_postgres_disconnect( USES_REGS1 );
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static Int c_postgres_number_of_fields( USES_REGS1 );
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static Int c_postgres_get_attributes_types( USES_REGS1 );
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static Int c_postgres_query( USES_REGS1 );
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static Int c_postgres_table_write( USES_REGS1 );
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static Int c_postgres_row( USES_REGS1 );
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static Int c_postgres_row_cut( USES_REGS1 );
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static Int c_postgres_get_fields_properties( USES_REGS1 );
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static Int c_postgres_get_next_result_set( USES_REGS1 );
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static Int c_postgres_get_database( USES_REGS1 );
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static Int c_postgres_change_database( USES_REGS1 );
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void Yap_InitMYDDAS_PGPreds(void)
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{
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/* db_dbect: Host x User x Passwd x Database x dbection x ERROR_CODE */
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Yap_InitCPred("c_postgres_connect", 7, c_postgres_connect, 0);
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/* db_number_of_fields: Relation x connection x NumberOfFields */
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Yap_InitCPred("c_postgres_number_of_fields",3, c_postgres_number_of_fields, 0);
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/* db_get_attributes_types: Relation x TypesList */
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Yap_InitCPred("c_postgres_get_attributes_types", 3, c_postgres_get_attributes_types, 0);
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/* db_query: SQLQuery x ResultSet x conection */
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Yap_InitCPred("c_postgres_query", 5, c_postgres_query, 0);
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/* db_disconnect: connection */
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Yap_InitCPred("c_postgres_disconnect", 1,c_postgres_disconnect, 0);
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/* db_table_write: Result Set */
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Yap_InitCPred("c_postgres_table_write", 1, c_postgres_table_write, 0);
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/* db_get_fields_properties: PredName x connection x PropertiesList*/
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Yap_InitCPred("c_postgres_get_fields_properties",3,c_postgres_get_fields_properties,0);
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Yap_InitCPred("c_postgres_get_next_result_set",2,c_postgres_get_next_result_set,0);
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/* c_postgres_get_database: connection x DataBaseName */
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Yap_InitCPred("c_postgres_get_database",2,c_postgres_get_database,0);
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/* c_postgres_change_database: connection x DataBaseName */
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Yap_InitCPred("c_postgres_change_database",2,c_postgres_change_database,0);
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}
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void Yap_InitBackMYDDAS_PGPreds(void)
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{
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/* db_row: ResultSet x Arity x ListOfArgs */
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Yap_InitCPredBackCut("c_postgres_row", 3, sizeof(Int),
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c_postgres_row,
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c_postgres_row,
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c_postgres_row_cut, 0);
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}
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static Int
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c_postgres_connect( USES_REGS1 ) {
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int i=0;
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Term arg_host = Deref(ARG1);
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Term arg_user = Deref(ARG2);
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Term arg_passwd = Deref(ARG3);
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Term arg_database = Deref(ARG4);
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Term arg_port = Deref(ARG5);
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Term arg_socket = Deref(ARG6);
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Term arg_conn = ARG7;
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Term tempty = MkAtomTerm(Yap_LookupAtom(""));
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Term tzero = MkIntTerm(0);
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const char *keywords[8], *values[8];
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char ports[16];
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if (IsApplTerm(arg_host)) {
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keywords[i] = "hostaddr";
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values[i++] = RepAtom(AtomOfTerm(ArgOfTerm(1, arg_host)))->StrOfAE;
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} else {
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keywords[i] = "host";
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values[i++] = RepAtom(AtomOfTerm(arg_host))->StrOfAE;
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}
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if (IsNonVarTerm(arg_user) && arg_user != tempty && IsAtomTerm(arg_user)) {
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keywords[i] = "user";
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values[i++] = RepAtom(AtomOfTerm(arg_user))->StrOfAE;
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}
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if (IsNonVarTerm(arg_user) && arg_passwd != tempty && IsAtomTerm(arg_passwd)) {
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||||
keywords[i] = "password";
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||||
values[i++] = RepAtom(AtomOfTerm(arg_passwd))->StrOfAE;
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||||
}
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||||
if (IsNonVarTerm(arg_user) && arg_database != tempty && IsAtomTerm(arg_database)) {
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||||
keywords[i] = "dbase";
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||||
values[i++] = RepAtom(AtomOfTerm(arg_database))->StrOfAE;
|
||||
}
|
||||
if (IsNonVarTerm(arg_user) && arg_port != tzero && IsIntTerm(arg_port)) {
|
||||
keywords[i] = "port";
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||||
snprintf(ports, sizeof(ports)-1, "%d", (int)IntOfTerm(arg_port));
|
||||
values[i++] = ports;
|
||||
} else if (IsNonVarTerm(arg_socket) && arg_socket != tempty && IsIntTerm(arg_socket)) {
|
||||
keywords[i] = "port";
|
||||
values[i++] = RepAtom(AtomOfTerm(arg_database))->StrOfAE;
|
||||
}
|
||||
keywords[i] = NULL;
|
||||
values[i++] = NULL;
|
||||
|
||||
/* Make a connection to the database */
|
||||
PGconn *db = PQconnectdbParams(keywords, values, 0);
|
||||
|
||||
/* Check to see that the backend c onnection was successfully made */
|
||||
if (PQstatus(db) != CONNECTION_OK)
|
||||
{
|
||||
fprintf(stderr, "Connection to database failed: %s",
|
||||
PQerrorMessage(db));
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
if (!Yap_unify(arg_conn, MkAddressTerm(db)))
|
||||
return FALSE;
|
||||
else
|
||||
{
|
||||
/* Criar um novo no na lista de ligacoes*/
|
||||
MYDDAS_UTIL_CONNECTION cnew = myddas_util_add_connection(db,NULL,MYDDAS_POSTGRES);
|
||||
|
||||
if (cnew == NULL){
|
||||
#ifdef DEBUG
|
||||
printf("ERROR: ** c_db_my_connect ** Error allocating memory\n");
|
||||
#endif
|
||||
return FALSE;
|
||||
}
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
|
||||
|
||||
static MYDDAS_STATS_TIME
|
||||
myddas_stat_init_query( PGconn *db )
|
||||
{
|
||||
#ifdef MYDDAS_STATS
|
||||
MYDDAS_UTIL_connecTION node = myddas_util_search_connection(db);
|
||||
MyddasULInt count = 0;
|
||||
|
||||
/* Count the number of querys made to the server */
|
||||
MyddasULInt number_querys;
|
||||
MYDDAS_STATS_CON_GET_NUMBER_QUERIES_MADE(node,number_querys);
|
||||
MYDDAS_STATS_CON_SET_NUMBER_QUERIES_MADE(node,++number_querys);
|
||||
MYDDAS_STATS_CON_GET_NUMBER_QUERIES_MADE_COUNT(node,count);
|
||||
MYDDAS_STATS_CON_SET_NUMBER_QUERIES_MADE_COUNT(node,++count);
|
||||
/* Measure time spent by the PG Server
|
||||
processing the SQL Query */
|
||||
return myddas_stats_walltime();
|
||||
#else
|
||||
return NULL;
|
||||
#endif
|
||||
}
|
||||
|
||||
|
||||
static MYDDAS_STATS_TIME
|
||||
myddas_stat_end_query( MYDDAS_STATS_TIME start )
|
||||
{
|
||||
MYDDAS_STATS_TIME diff = NULL;
|
||||
#ifdef MYDDAS_STATS
|
||||
/* Measure time spent by the PG Server
|
||||
processing the SQL Query */
|
||||
MYDDAS_STATS_TIME end = myddas_stats_walltime();
|
||||
|
||||
MYDDAS_STATS_INITIALIZE_TIME_STRUCT(diff,time_copy);
|
||||
myddas_stats_subtract_time(diff,end,start);
|
||||
diff = myddas_stats_time_copy_to_final(diff);
|
||||
|
||||
MYDDAS_FREE(end,struct myddas_stats_time_struct);
|
||||
MYDDAS_FREE(start,struct myddas_stats_time_struct);
|
||||
|
||||
MYDDAS_STATS_CON_GET_TOTAL_TIME_DBSERVER(node,total_time);
|
||||
/* Automacally updates the MYDDAS_STRUCTURE */
|
||||
myddas_stats_add_time(total_time,diff,total_time);
|
||||
MYDDAS_STATS_CON_GET_TOTAL_TIME_DBSERVER_COUNT(node,count);
|
||||
MYDDAS_STATS_CON_SET_TOTAL_TIME_DBSERVER_COUNT(node,++count);
|
||||
|
||||
MYDDAS_STATS_TIME time = NULL;
|
||||
MYDDAS_STATS_CON_GET_LAST_TIME_DBSERVER(node,time);
|
||||
myddas_stats_move_time(diff,time);
|
||||
MYDDAS_STATS_CON_GET_LAST_TIME_DBSERVER_COUNT(node,count);
|
||||
MYDDAS_STATS_CON_SET_LAST_TIME_DBSERVER_COUNT(node,++count);
|
||||
#endif
|
||||
return diff;
|
||||
}
|
||||
|
||||
#ifdef MYDDAS_STATS
|
||||
/* measure transfer time */
|
||||
static void
|
||||
myddas_stat_transfer_query( MYDDAS_STATS_TIME diff )
|
||||
{
|
||||
/* Measure time spent by the PG Server
|
||||
transferring the result of the last query
|
||||
back to the client */
|
||||
start = myddas_stats_walltime();
|
||||
/* Measure time spent by the PG Server
|
||||
transferring the result of the last query
|
||||
back to the client */
|
||||
end = myddas_stats_walltime();
|
||||
|
||||
MYDDAS_STATS_INITIALIZE_TIME_STRUCT(diff,time_copy);
|
||||
myddas_stats_subtract_time(diff,end,start);
|
||||
diff = MYDDAS_STATS_TIME_copy_to_final(diff);
|
||||
|
||||
MYDDAS_FREE(end,struct myddas_stats_time_struct);
|
||||
MYDDAS_FREE(start,struct myddas_stats_time_struct);
|
||||
|
||||
MYDDAS_STATS_CON_GET_TOTAL_TIME_TRANSFERING(node,total_time);
|
||||
/* Automacally updates the MYDDAS_STRUCTURE */
|
||||
myddas_stats_add_time(total_time,diff,total_time);
|
||||
MYDDAS_STATS_CON_GET_TOTAL_TIME_TRANSFERING_COUNT(node,count);
|
||||
MYDDAS_STATS_CON_SET_TOTAL_TIME_TRANSFERING_COUNT(node,++count);
|
||||
|
||||
time = NULL;
|
||||
MYDDAS_STATS_CON_GET_LAST_TIME_TRANSFERING(node,time);
|
||||
MYDDAS_STATS_CON_GET_LAST_TIME_TRANSFERING_COUNT(node,count);
|
||||
MYDDAS_STATS_CON_SET_LAST_TIME_TRANSFERING_COUNT(node,++count);
|
||||
myddas_stats_move_time(diff,time);
|
||||
|
||||
/* Measure the number of Rows returned from the server */
|
||||
if (res_set != NULL)
|
||||
{
|
||||
/* With an INSERT statement, PG_(use or store)_result()
|
||||
returns a NULL pointer*/
|
||||
|
||||
/* This is only works if we use PG_store_result */
|
||||
MyddasUInt numberRows = PG_num_rows(res_set);
|
||||
MyddasUInt rows;
|
||||
myddas_stat_transfer_query( diff );
|
||||
|
||||
MYDDAS_STATS_CON_GET_TOTAL_ROWS(node,rows);
|
||||
numberRows = numberRows + rows;
|
||||
MYDDAS_STATS_CON_SET_TOTAL_ROWS(node,numberRows);
|
||||
MYDDAS_STATS_CON_GET_TOTAL_ROWS_COUNT(node,count);
|
||||
MYDDAS_STATS_CON_SET_TOTAL_ROWS_COUNT(node,++count);
|
||||
|
||||
/* Calculate the ammount of data sent by the server */
|
||||
MyddasUInt total,number_fields = PG_num_fields(res_set);
|
||||
PG_ROW row;
|
||||
MyddasULInt i;
|
||||
total=0;
|
||||
while ((row = PG_fetch_row(res_set)) != NULL){
|
||||
PG_field_seek(res_set,0);
|
||||
|
||||
for(i=0;i<number_fields;i++){
|
||||
if (row[i] != NULL)
|
||||
total = total + strlen(row[i]);
|
||||
}
|
||||
}
|
||||
MYDDAS_STATS_CON_SET_LAST_BYTES_TRANSFERING_FROM_DBSERVER(node,total);
|
||||
MYDDAS_STATS_CON_GET_LAST_BYTES_TRANSFERING_FROM_DBSERVER_COUNT(node,count);
|
||||
MYDDAS_STATS_CON_SET_LAST_BYTES_TRANSFERING_FROM_DBSERVER_COUNT(node,++count);
|
||||
|
||||
MyddasUInt bytes = 0;
|
||||
MYDDAS_STATS_CON_GET_TOTAL_BYTES_TRANSFERING_FROM_DBSERVER(node,bytes);
|
||||
total = total + bytes;
|
||||
MYDDAS_STATS_CON_SET_TOTAL_BYTES_TRANSFERING_FROM_DBSERVER(node,total);
|
||||
MYDDAS_STATS_CON_GET_TOTAL_BYTES_TRANSFERING_FROM_DBSERVER_COUNT(node,count);
|
||||
MYDDAS_STATS_CON_SET_TOTAL_BYTES_TRANSFERING_FROM_DBSERVER_COUNT(node,++count);
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
/* db_query: SQLQuery x ResultSet x connection */
|
||||
static Int
|
||||
c_postgres_query( USES_REGS1 ) {
|
||||
Term arg_sql_query = Deref(ARG1);
|
||||
Term arg_result_set = Deref(ARG2);
|
||||
Term arg_db = Deref(ARG3);
|
||||
Term arg_mode = Deref(ARG4);
|
||||
Term arg_arity = ARG5;
|
||||
|
||||
const char *sql = AtomName(AtomOfTerm(arg_sql_query));
|
||||
const char *mode = AtomName(AtomOfTerm(arg_mode));
|
||||
PGresult *res;
|
||||
PGconn *db = AddressOfTerm(arg_db);
|
||||
|
||||
struct result_set *rs = malloc(sizeof( struct result_set));
|
||||
if (!rs)
|
||||
return FALSE;
|
||||
rs->db = db;
|
||||
rs->i = 0;
|
||||
|
||||
|
||||
MYDDAS_STATS_TIME start, end;
|
||||
start = myddas_stat_init_query( db );
|
||||
|
||||
const char *stmt = AtomName(Yap_LookupAtom(sql));
|
||||
|
||||
/* Send query to server and process it */
|
||||
if (strcmp(mode,"store_result")!=0) {
|
||||
// Leave data for extraction
|
||||
CALL_POSTGRES (prepare(db, stmt, sql, 0, NULL) );
|
||||
GET_POSTGRES (describePrepared(db, stmt) , res );
|
||||
rs->stmt = stmt;
|
||||
rs->res = NULL;
|
||||
rs->nrows = -1;
|
||||
rs->ncols = PQnfields(res);
|
||||
if (!Yap_unify(arg_arity, MkIntegerTerm(rs->ncols)))
|
||||
{
|
||||
free(rs);
|
||||
return FALSE;
|
||||
}
|
||||
if (!Yap_unify(arg_result_set, MkAddressTerm( rs)))
|
||||
{
|
||||
free(rs);
|
||||
return FALSE;
|
||||
}
|
||||
return TRUE;
|
||||
} else {
|
||||
// construct an intermediate table, res_set
|
||||
int nrows, ncols;
|
||||
|
||||
GET_POSTGRES (exec(db, sql), res );
|
||||
end = myddas_stat_end_query( start );
|
||||
ncols = PQnfields(res);
|
||||
nrows = PQntuples(res);
|
||||
//INSERT statements don't return any res_set
|
||||
if (nrows == 0) {
|
||||
return TRUE;
|
||||
}
|
||||
if (!Yap_unify(arg_arity, MkIntegerTerm(nrows))){
|
||||
/*
|
||||
* Should PGclear PGresult whenever it is no longer needed to avoid memory
|
||||
* leaks
|
||||
*/
|
||||
free(rs);
|
||||
PQclear(res);
|
||||
return FALSE;
|
||||
}
|
||||
rs->stmt = NULL;
|
||||
rs->res = res;
|
||||
rs->nrows = nrows;
|
||||
rs->ncols = ncols;
|
||||
if (!Yap_unify(arg_result_set, MkAddressTerm( rs)))
|
||||
{
|
||||
free(rs);
|
||||
PQclear(res);
|
||||
return FALSE;
|
||||
}
|
||||
}
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
|
||||
static Int
|
||||
c_postgres_number_of_fields( USES_REGS1 ) {
|
||||
Term arg_relation = Deref(ARG1);
|
||||
Term arg_db = Deref(ARG2);
|
||||
Term arg_fields = ARG3;
|
||||
|
||||
const char *relation = AtomName(AtomOfTerm(arg_relation));
|
||||
PGconn *db = AddressOfTerm(arg_db);
|
||||
const char *stmt;
|
||||
PGresult *res;
|
||||
|
||||
char sql[256];
|
||||
|
||||
snprintf(sql, 255, "SELECT * FROM TABLE `%s`",relation);
|
||||
// Leave data for extraction
|
||||
stmt = AtomName(Yap_LookupAtom(sql));
|
||||
CALL_POSTGRES (prepare(db, stmt, sql, 0, NULL) );
|
||||
|
||||
/* executar a query SQL */
|
||||
|
||||
int nrows = PQntuples(res);
|
||||
|
||||
PQclear( res );
|
||||
|
||||
return Yap_unify(arg_fields, MkIntegerTerm( nrows ));
|
||||
}
|
||||
|
||||
|
||||
/* db_get_attributes_types: RelName x connection -> TypesList */
|
||||
static Int
|
||||
c_postgres_get_attributes_types( USES_REGS1 ) {
|
||||
Term arg_relation = Deref(ARG1);
|
||||
Term arg_db = Deref(ARG2);
|
||||
Term arg_types_list = Deref(ARG3);
|
||||
Term list, head;
|
||||
|
||||
const char *relation = AtomName(AtomOfTerm(arg_relation));
|
||||
PGconn *db = AddressOfTerm(arg_db);
|
||||
char sql[256];
|
||||
//int row;
|
||||
PGresult *res;
|
||||
|
||||
const char *stmt;
|
||||
Int rc = TRUE;
|
||||
|
||||
sprintf(sql,"SELECT * FROM TABLE `%s`",relation);
|
||||
// Leave data for extraction
|
||||
stmt = AtomName(Yap_LookupAtom(sql));
|
||||
// Leave data for extraction
|
||||
GET_POSTGRES (prepare(db, stmt, sql, 0, NULL), res );
|
||||
|
||||
/* executar a query SQL */
|
||||
|
||||
|
||||
int cols = PQnfields( res ), col;
|
||||
|
||||
list = arg_types_list;
|
||||
|
||||
for (col = 0; col < cols; col++)
|
||||
{
|
||||
const char *tm;
|
||||
|
||||
|
||||
head = HeadOfTerm(list);
|
||||
rc = (
|
||||
rc && Yap_unify(head, MkAtomTerm(Yap_LookupAtom(PQfname(res, col))) ) );
|
||||
list = TailOfTerm(list);
|
||||
head = HeadOfTerm(list);
|
||||
list = TailOfTerm(list);
|
||||
|
||||
Oid type = PQftype(res, col);
|
||||
switch(type) {
|
||||
case BYTEOID:
|
||||
case CHAROID:
|
||||
case INT2OID:
|
||||
case INT4OID:
|
||||
case INT8OID:
|
||||
tm = "integer";
|
||||
break;
|
||||
case FLOAT4OID:
|
||||
case FLOAT8OID:
|
||||
tm = "real";
|
||||
break;
|
||||
case NAMEOID:
|
||||
tm = "atom";
|
||||
break;
|
||||
case TEXTOID:
|
||||
tm = "string";
|
||||
break;
|
||||
default:
|
||||
tm = "unknown type";
|
||||
break;
|
||||
}
|
||||
if (!Yap_unify(head, MkAtomTerm(Yap_LookupAtom(tm))) )
|
||||
rc = FALSE;
|
||||
}
|
||||
|
||||
PQclear( res );
|
||||
|
||||
return rc;
|
||||
|
||||
}
|
||||
|
||||
/* db_disconnect */
|
||||
static Int
|
||||
c_postgres_disconnect( USES_REGS1 ) {
|
||||
Term arg_db = Deref(ARG1);
|
||||
|
||||
PGconn *db = AddressOfTerm(arg_db);
|
||||
|
||||
if ((myddas_util_search_connection(db)) != NULL)
|
||||
{
|
||||
myddas_util_delete_connection(db);
|
||||
PQfinish(db);
|
||||
return TRUE;
|
||||
}
|
||||
else
|
||||
{
|
||||
return FALSE;
|
||||
}
|
||||
}
|
||||
|
||||
/* db_table_write: Result Set */
|
||||
static Int
|
||||
c_postgres_table_write( USES_REGS1 ) {
|
||||
/*
|
||||
Term arg_res_set = Deref(ARG1);
|
||||
PG_RES *res_set = (PG_RES *) IntegerOfTerm(arg_res_set);
|
||||
|
||||
mydas_util_table_write(res_set);
|
||||
PG_free_result(res_set);
|
||||
*/
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
static Int
|
||||
c_postgres_get_fields_properties( USES_REGS1 ) {
|
||||
Term nome_relacao = Deref(ARG1);
|
||||
Term arg_db = Deref(ARG2);
|
||||
Term fields_properties_list = Deref(ARG3);
|
||||
Term head, list;
|
||||
PGresult *res;
|
||||
|
||||
const char *relation = AtomName(AtomOfTerm(nome_relacao));
|
||||
char sql[256];
|
||||
Int num_fields,i;
|
||||
PGconn *db = AddressOfTerm(arg_db);
|
||||
|
||||
sprintf(sql,"\\d+ `%s`",relation);
|
||||
|
||||
GET_POSTGRES (exec(db, sql), res );
|
||||
|
||||
#if MYDDAS_STATS
|
||||
end = myddas_stat_end_query( start );
|
||||
#endif
|
||||
|
||||
Functor functor = Yap_MkFunctor(Yap_LookupAtom("property"),4);
|
||||
|
||||
list = fields_properties_list;
|
||||
|
||||
num_fields = PQntuples(res);
|
||||
|
||||
int coln;
|
||||
const char *propname;
|
||||
|
||||
if (( coln = PQfnumber(res,"Column")) < 0)
|
||||
return FALSE;
|
||||
if (( propname = PQfname(res,2)) == NULL)
|
||||
return FALSE;
|
||||
if (!strstr(propname, "Table") || !strstr(propname, "Modifiers") )
|
||||
return FALSE;
|
||||
|
||||
for (i=0;i<num_fields;i++)
|
||||
{
|
||||
Term properties[4];
|
||||
|
||||
head = HeadOfTerm(list);
|
||||
|
||||
if (!PQgetisnull(res, i, coln)) {
|
||||
const char *col = PQgetvalue(res, i, coln);
|
||||
properties[0] = MkAtomTerm(Yap_LookupAtom(col));
|
||||
}
|
||||
if (!PQgetisnull(res, i, 2)) {
|
||||
const char *props = PQgetvalue(res, i, 2);
|
||||
properties[1] = MkIntegerTerm(strstr(props, "not null") != NULL); //Can't be NULL
|
||||
properties[2] = MkIntegerTerm(strstr(props, "prim") != NULL); //Can't be NULL
|
||||
properties[3] = MkIntegerTerm(strstr(props, "nextval") != NULL); //Can't be NULL
|
||||
}
|
||||
list = TailOfTerm(list);
|
||||
if (!Yap_unify(head, Yap_MkApplTerm(functor,4,properties))){
|
||||
return FALSE;
|
||||
}
|
||||
}
|
||||
|
||||
PQclear(res);
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
/* c_postgres_get_next_result_set: connection * NextResSet */
|
||||
static Int
|
||||
c_postgres_get_next_result_set( USES_REGS1 ) {
|
||||
//Term arg_db = Deref(ARG1);
|
||||
//Term arg_next_res_set = Deref(ARG2);
|
||||
|
||||
//PGconn *db = AddressOfTerm(arg_db);
|
||||
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
static Int
|
||||
c_postgres_get_database( USES_REGS1 ) {
|
||||
Term arg_con = Deref(ARG1);
|
||||
Term arg_database = Deref(ARG2);
|
||||
|
||||
if (!Yap_unify(arg_database,arg_con))
|
||||
return FALSE;
|
||||
|
||||
return TRUE;
|
||||
|
||||
}
|
||||
|
||||
static Int
|
||||
c_postgres_change_database( USES_REGS1 ) {
|
||||
/* no-op for now */
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
static Int
|
||||
c_postgres_row_cut( USES_REGS1 ) {
|
||||
struct result_set *res_set=NULL;
|
||||
PGconn *db = res_set->db;
|
||||
|
||||
res_set = AddressOfTerm(EXTRA_CBACK_CUT_ARG(Term,1));
|
||||
PQclear( res_set->res );
|
||||
PQfinish( db );
|
||||
free(res_set);
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
#define cvt( s ) cvt__( s PASS_REGS )
|
||||
|
||||
static Term
|
||||
cvt__(const char *s USES_REGS) {
|
||||
return Yap_CharsToTDQ( s, CurrentModule, ENC_ISO_LATIN1 PASS_REGS);
|
||||
}
|
||||
|
||||
/* db_row: ResultSet x Arity_ListOfArgs x ListOfArgs -> */
|
||||
static Int
|
||||
c_postgres_row( USES_REGS1 ) {
|
||||
#ifdef MYDDAS_STATS
|
||||
/* Measure time used by the */
|
||||
/* c_postgres_row function */
|
||||
//MYDDAS_STATS_TIME start,end,total_time,diff;
|
||||
MyddasULInt count = 0;
|
||||
MYDDAS_STATS_TIME start, end;
|
||||
start = myddas_stats_walltime();
|
||||
#endif
|
||||
Term arg_result_set = Deref(ARG1);
|
||||
Term arg_arity = Deref(ARG2);
|
||||
Term arg_list_args = Deref(ARG3);
|
||||
Int rc = TRUE;
|
||||
|
||||
if (IsVarTerm( arg_result_set ) ) {
|
||||
if (!c_postgres_query( PASS_REGS1 ) ) {
|
||||
cut_fail();
|
||||
}
|
||||
arg_result_set = Deref(ARG1);
|
||||
EXTRA_CBACK_ARG(3,1)= arg_result_set ;
|
||||
EXTRA_CBACK_ARG(3,2)= MkIntegerTerm(0) ;
|
||||
}
|
||||
struct result_set *res_set = AddressOfTerm(arg_result_set);
|
||||
|
||||
Term head, list, NULL_atom[1];
|
||||
Int arity;
|
||||
list = arg_list_args;
|
||||
arity = IntegerOfTerm(arg_arity);
|
||||
PGconn *db = res_set->db;
|
||||
if (res_set->stmt == NULL ) {
|
||||
CACHE_REGS
|
||||
Int i= IntegerOfTerm(EXTRA_CBACK_CUT_ARG(Term,2)), j;
|
||||
Int rc = true;
|
||||
// data needs to be copied to Prolog
|
||||
// row by row
|
||||
#ifdef MYDDAS_STATS
|
||||
MYDDAS_STATS_TIME diff;
|
||||
|
||||
MYDDAS_STATS_INITIALIZE_TIME_STRUCT(diff,time_copy);
|
||||
#endif
|
||||
for (j = 0; j < arity; j++)
|
||||
{
|
||||
/* Ts -> List */
|
||||
const char *field = PQgetvalue(res_set->res, i, j);
|
||||
head = HeadOfTerm(list);
|
||||
list = TailOfTerm(list);
|
||||
rc = (rc && Yap_unify(head, cvt( field )) );
|
||||
}
|
||||
if (rc) {
|
||||
EXTRA_CBACK_ARG(3,2)= MkIntegerTerm(i+1);
|
||||
return rc;
|
||||
}
|
||||
#ifdef MYDDAS_STATS
|
||||
myddas_stat_transfer_query( diff );
|
||||
#endif
|
||||
cut_fail();
|
||||
}
|
||||
// busy-waiting
|
||||
if (!PQsetnonblocking(res_set->db, 1)) {
|
||||
fprintf(stderr, "Connection to database failed: %s",
|
||||
PQerrorMessage(db));
|
||||
return FALSE;
|
||||
|
||||
}
|
||||
if (!PQsendQueryPrepared(res_set->db, res_set->stmt, 0, NULL, NULL, NULL, 0)) {
|
||||
fprintf(stderr, "Connection to database failed: %s",
|
||||
PQerrorMessage(db));
|
||||
return FALSE;
|
||||
|
||||
}
|
||||
PGresult *res;
|
||||
while((res = PQgetResult(res_set->db)) != NULL);
|
||||
int i;
|
||||
if ((i = res_set->nrows) == 0) {
|
||||
// no more data
|
||||
PQfinish( res_set->db );
|
||||
free(res_set);
|
||||
#ifdef MYDDAS_STATS
|
||||
end = myddas_stats_walltime();
|
||||
|
||||
MYDDAS_STATS_INITIALIZE_TIME_STRUCT(diff,time_copy);
|
||||
myddas_stats_subtract_time(diff,end,start);
|
||||
diff = myddas_stats_time_copy_to_final(diff);
|
||||
|
||||
MYDDAS_FREE(end,struct myddas_stats_time_struct);
|
||||
MYDDAS_FREE(start,struct myddas_stats_time_struct);
|
||||
|
||||
MYDDAS_STATS_GET_DB_ROW_FUNCTION(total_time);
|
||||
myddas_stats_add_time(total_time,diff,total_time);
|
||||
MYDDAS_STATS_GET_DB_ROW_FUNCTION_COUNT(count);
|
||||
MYDDAS_STATS_SET_DB_ROW_FUNCTION_COUNT(++count);
|
||||
|
||||
MYDDAS_FREE(diff,struct myddas_stats_time_struct);
|
||||
#endif /* MYDDAS_STATS */
|
||||
cut_fail(); /* This macro already does a return FALSE */
|
||||
|
||||
} else if (i < res_set->nrows) {
|
||||
list = arg_list_args;
|
||||
Term tf;
|
||||
int j;
|
||||
|
||||
for (j = 0; j < arity; j++)
|
||||
{
|
||||
/* convert data types here */
|
||||
head = HeadOfTerm(list);
|
||||
list = TailOfTerm(list);
|
||||
|
||||
if (!PQgetisnull(res, i, j)) {
|
||||
const char *col = PQgetvalue(res, i, j);
|
||||
tf = MkAtomTerm(Yap_LookupAtom(col));
|
||||
} else {
|
||||
NULL_atom[0] = MkIntegerTerm(NULL_id++);
|
||||
tf = Yap_MkApplTerm(Yap_MkFunctor(Yap_LookupAtom("NULL"),1),1,NULL_atom);
|
||||
}
|
||||
}
|
||||
if (!Yap_unify(head, tf))
|
||||
rc = FALSE;
|
||||
#ifdef MYDDAS_STATS
|
||||
end = myddas_stats_walltime();
|
||||
|
||||
myddas_stats_subtract_time(diff,end,start);
|
||||
diff = myddas_stats_time_copy_to_final(diff);
|
||||
|
||||
MYDDAS_FREE(end,struct myddas_stats_time_struct);
|
||||
MYDDAS_FREE(start,struct myddas_stats_time_struct);
|
||||
|
||||
MYDDAS_STATS_GET_DB_ROW_FUNCTION(total_time);
|
||||
myddas_stats_add_time(total_time,diff,total_time);
|
||||
MYDDAS_STATS_GET_DB_ROW_FUNCTION_COUNT(count);
|
||||
MYDDAS_STATS_SET_DB_ROW_FUNCTION_COUNT(++count);
|
||||
|
||||
MYDDAS_FREE(diff,struct myddas_stats_time_struct);
|
||||
#endif /* MYDDAS_STATS */
|
||||
} return rc;
|
||||
}
|
||||
|
||||
#else
|
||||
|
||||
void Yap_InitMYDDAS_PGPreds(void);
|
||||
void Yap_InitBackMYDDAS_PGPreds(void);
|
||||
|
||||
void Yap_InitMYDDAS_PGPreds(void)
|
||||
{
|
||||
}
|
||||
|
||||
void Yap_InitBackMYDDAS_PGPreds(void)
|
||||
{
|
||||
}
|
||||
|
||||
#endif
|
||||
Reference in New Issue
Block a user